1066 lines
52 KiB
HTML
1066 lines
52 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge"><![endif]-->
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta name="generator" content="Asciidoctor 1.5.8">
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<title>git-bisect(1)</title>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700">
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<style>
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/* Asciidoctor default stylesheet | MIT License | http://asciidoctor.org */
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/* Uncomment @import statement below to use as custom stylesheet */
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/*@import "https://fonts.googleapis.com/css?family=Open+Sans:300,300italic,400,400italic,600,600italic%7CNoto+Serif:400,400italic,700,700italic%7CDroid+Sans+Mono:400,700";*/
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article,aside,details,figcaption,figure,footer,header,hgroup,main,nav,section,summary{display:block}
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audio,canvas,video{display:inline-block}
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audio:not([controls]){display:none;height:0}
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script{display:none!important}
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html{font-family:sans-serif;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}
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a{background:transparent}
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a:focus{outline:thin dotted}
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a:active,a:hover{outline:0}
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h1{font-size:2em;margin:.67em 0}
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abbr[title]{border-bottom:1px dotted}
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b,strong{font-weight:bold}
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dfn{font-style:italic}
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hr{-moz-box-sizing:content-box;box-sizing:content-box;height:0}
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mark{background:#ff0;color:#000}
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code,kbd,pre,samp{font-family:monospace;font-size:1em}
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pre{white-space:pre-wrap}
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q{quotes:"\201C" "\201D" "\2018" "\2019"}
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small{font-size:80%}
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sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}
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sup{top:-.5em}
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sub{bottom:-.25em}
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img{border:0}
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svg:not(:root){overflow:hidden}
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figure{margin:0}
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fieldset{border:1px solid silver;margin:0 2px;padding:.35em .625em .75em}
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legend{border:0;padding:0}
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button,input,select,textarea{font-family:inherit;font-size:100%;margin:0}
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button,input{line-height:normal}
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button,select{text-transform:none}
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button,html input[type="button"],input[type="reset"],input[type="submit"]{-webkit-appearance:button;cursor:pointer}
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button[disabled],html input[disabled]{cursor:default}
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input[type="checkbox"],input[type="radio"]{box-sizing:border-box;padding:0}
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button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}
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textarea{overflow:auto;vertical-align:top}
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table{border-collapse:collapse;border-spacing:0}
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*,*::before,*::after{-moz-box-sizing:border-box;-webkit-box-sizing:border-box;box-sizing:border-box}
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html,body{font-size:100%}
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body{background:#fff;color:rgba(0,0,0,.8);padding:0;margin:0;font-family:"Noto Serif","DejaVu Serif",serif;font-weight:400;font-style:normal;line-height:1;position:relative;cursor:auto;tab-size:4;-moz-osx-font-smoothing:grayscale;-webkit-font-smoothing:antialiased}
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a:hover{cursor:pointer}
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img,object,embed{max-width:100%;height:auto}
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object,embed{height:100%}
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img{-ms-interpolation-mode:bicubic}
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.left{float:left!important}
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.right{float:right!important}
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.text-left{text-align:left!important}
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.text-right{text-align:right!important}
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.text-center{text-align:center!important}
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.text-justify{text-align:justify!important}
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.hide{display:none}
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img,object,svg{display:inline-block;vertical-align:middle}
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textarea{height:auto;min-height:50px}
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select{width:100%}
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.center{margin-left:auto;margin-right:auto}
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.stretch{width:100%}
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.subheader,.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{line-height:1.45;color:#7a2518;font-weight:400;margin-top:0;margin-bottom:.25em}
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div,dl,dt,dd,ul,ol,li,h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6,pre,form,p,blockquote,th,td{margin:0;padding:0;direction:ltr}
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a{color:#2156a5;text-decoration:underline;line-height:inherit}
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a:hover,a:focus{color:#1d4b8f}
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a img{border:none}
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p{font-family:inherit;font-weight:400;font-size:1em;line-height:1.6;margin-bottom:1.25em;text-rendering:optimizeLegibility}
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p aside{font-size:.875em;line-height:1.35;font-style:italic}
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h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{font-family:"Open Sans","DejaVu Sans",sans-serif;font-weight:300;font-style:normal;color:#ba3925;text-rendering:optimizeLegibility;margin-top:1em;margin-bottom:.5em;line-height:1.0125em}
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h1 small,h2 small,h3 small,#toctitle small,.sidebarblock>.content>.title small,h4 small,h5 small,h6 small{font-size:60%;color:#e99b8f;line-height:0}
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h1{font-size:2.125em}
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h2{font-size:1.6875em}
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h3,#toctitle,.sidebarblock>.content>.title{font-size:1.375em}
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h4,h5{font-size:1.125em}
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h6{font-size:1em}
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hr{border:solid #dddddf;border-width:1px 0 0;clear:both;margin:1.25em 0 1.1875em;height:0}
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em,i{font-style:italic;line-height:inherit}
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strong,b{font-weight:bold;line-height:inherit}
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small{font-size:60%;line-height:inherit}
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code{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;font-weight:400;color:rgba(0,0,0,.9)}
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ul,ol,dl{font-size:1em;line-height:1.6;margin-bottom:1.25em;list-style-position:outside;font-family:inherit}
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ul,ol{margin-left:1.5em}
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ul li ul,ul li ol{margin-left:1.25em;margin-bottom:0;font-size:1em}
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ul.square li ul,ul.circle li ul,ul.disc li ul{list-style:inherit}
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ul.square{list-style-type:square}
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ul.circle{list-style-type:circle}
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ul.disc{list-style-type:disc}
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ol li ul,ol li ol{margin-left:1.25em;margin-bottom:0}
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dl dt{margin-bottom:.3125em;font-weight:bold}
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dl dd{margin-bottom:1.25em}
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abbr,acronym{text-transform:uppercase;font-size:90%;color:rgba(0,0,0,.8);border-bottom:1px dotted #ddd;cursor:help}
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abbr{text-transform:none}
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blockquote{margin:0 0 1.25em;padding:.5625em 1.25em 0 1.1875em;border-left:1px solid #ddd}
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blockquote cite{display:block;font-size:.9375em;color:rgba(0,0,0,.6)}
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blockquote cite::before{content:"\2014 \0020"}
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blockquote cite a,blockquote cite a:visited{color:rgba(0,0,0,.6)}
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blockquote,blockquote p{line-height:1.6;color:rgba(0,0,0,.85)}
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@media screen and (min-width:768px){h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2}
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h1{font-size:2.75em}
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h2{font-size:2.3125em}
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h3,#toctitle,.sidebarblock>.content>.title{font-size:1.6875em}
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h4{font-size:1.4375em}}
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table{background:#fff;margin-bottom:1.25em;border:solid 1px #dedede}
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table thead,table tfoot{background:#f7f8f7}
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table thead tr th,table thead tr td,table tfoot tr th,table tfoot tr td{padding:.5em .625em .625em;font-size:inherit;color:rgba(0,0,0,.8);text-align:left}
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table tr th,table tr td{padding:.5625em .625em;font-size:inherit;color:rgba(0,0,0,.8)}
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table tr.even,table tr.alt,table tr:nth-of-type(even){background:#f8f8f7}
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table thead tr th,table tfoot tr th,table tbody tr td,table tr td,table tfoot tr td{display:table-cell;line-height:1.6}
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h1,h2,h3,#toctitle,.sidebarblock>.content>.title,h4,h5,h6{line-height:1.2;word-spacing:-.05em}
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h1 strong,h2 strong,h3 strong,#toctitle strong,.sidebarblock>.content>.title strong,h4 strong,h5 strong,h6 strong{font-weight:400}
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.clearfix::before,.clearfix::after,.float-group::before,.float-group::after{content:" ";display:table}
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.clearfix::after,.float-group::after{clear:both}
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*:not(pre)>code{font-size:.9375em;font-style:normal!important;letter-spacing:0;padding:.1em .5ex;word-spacing:-.15em;background-color:#f7f7f8;-webkit-border-radius:4px;border-radius:4px;line-height:1.45;text-rendering:optimizeSpeed;word-wrap:break-word}
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*:not(pre)>code.nobreak{word-wrap:normal}
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*:not(pre)>code.nowrap{white-space:nowrap}
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pre,pre>code{line-height:1.45;color:rgba(0,0,0,.9);font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;font-weight:400;text-rendering:optimizeSpeed}
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em em{font-style:normal}
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strong strong{font-weight:400}
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.keyseq{color:rgba(51,51,51,.8)}
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kbd{font-family:"Droid Sans Mono","DejaVu Sans Mono",monospace;display:inline-block;color:rgba(0,0,0,.8);font-size:.65em;line-height:1.45;background-color:#f7f7f7;border:1px solid #ccc;-webkit-border-radius:3px;border-radius:3px;-webkit-box-shadow:0 1px 0 rgba(0,0,0,.2),0 0 0 .1em white inset;box-shadow:0 1px 0 rgba(0,0,0,.2),0 0 0 .1em #fff inset;margin:0 .15em;padding:.2em .5em;vertical-align:middle;position:relative;top:-.1em;white-space:nowrap}
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.keyseq kbd:first-child{margin-left:0}
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.keyseq kbd:last-child{margin-right:0}
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.menuseq,.menuref{color:#000}
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.menuseq b:not(.caret),.menuref{font-weight:inherit}
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.menuseq{word-spacing:-.02em}
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.menuseq b.caret{font-size:1.25em;line-height:.8}
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.menuseq i.caret{font-weight:bold;text-align:center;width:.45em}
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b.button::before,b.button::after{position:relative;top:-1px;font-weight:400}
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b.button::before{content:"[";padding:0 3px 0 2px}
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b.button::after{content:"]";padding:0 2px 0 3px}
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p a>code:hover{color:rgba(0,0,0,.9)}
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#header,#content,#footnotes,#footer{width:100%;margin-left:auto;margin-right:auto;margin-top:0;margin-bottom:0;max-width:62.5em;*zoom:1;position:relative;padding-left:.9375em;padding-right:.9375em}
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#header::before,#header::after,#content::before,#content::after,#footnotes::before,#footnotes::after,#footer::before,#footer::after{content:" ";display:table}
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#header::after,#content::after,#footnotes::after,#footer::after{clear:both}
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#content{margin-top:1.25em}
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#content::before{content:none}
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#header>h1:first-child{color:rgba(0,0,0,.85);margin-top:2.25rem;margin-bottom:0}
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#header>h1:first-child+#toc{margin-top:8px;border-top:1px solid #dddddf}
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#header>h1:only-child,body.toc2 #header>h1:nth-last-child(2){border-bottom:1px solid #dddddf;padding-bottom:8px}
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#header .details{border-bottom:1px solid #dddddf;line-height:1.45;padding-top:.25em;padding-bottom:.25em;padding-left:.25em;color:rgba(0,0,0,.6);display:-ms-flexbox;display:-webkit-flex;display:flex;-ms-flex-flow:row wrap;-webkit-flex-flow:row wrap;flex-flow:row wrap}
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#header .details span:first-child{margin-left:-.125em}
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#header .details span.email a{color:rgba(0,0,0,.85)}
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#header .details br{display:none}
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#header .details br+span::before{content:"\00a0\2013\00a0"}
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#header .details br+span.author::before{content:"\00a0\22c5\00a0";color:rgba(0,0,0,.85)}
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#header .details br+span#revremark::before{content:"\00a0|\00a0"}
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#header #revnumber{text-transform:capitalize}
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#header #revnumber::after{content:"\00a0"}
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#content>h1:first-child:not([class]){color:rgba(0,0,0,.85);border-bottom:1px solid #dddddf;padding-bottom:8px;margin-top:0;padding-top:1rem;margin-bottom:1.25rem}
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#toc{border-bottom:1px solid #e7e7e9;padding-bottom:.5em}
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#toc>ul{margin-left:.125em}
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#toc ul.sectlevel0>li>a{font-style:italic}
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#toc ul.sectlevel0 ul.sectlevel1{margin:.5em 0}
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#toc ul{font-family:"Open Sans","DejaVu Sans",sans-serif;list-style-type:none}
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#toc li{line-height:1.3334;margin-top:.3334em}
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#toc a{text-decoration:none}
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#toc a:active{text-decoration:underline}
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#toctitle{color:#7a2518;font-size:1.2em}
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@media screen and (min-width:768px){#toctitle{font-size:1.375em}
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body.toc2{padding-left:15em;padding-right:0}
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#toc.toc2{margin-top:0!important;background-color:#f8f8f7;position:fixed;width:15em;left:0;top:0;border-right:1px solid #e7e7e9;border-top-width:0!important;border-bottom-width:0!important;z-index:1000;padding:1.25em 1em;height:100%;overflow:auto}
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#toc.toc2 #toctitle{margin-top:0;margin-bottom:.8rem;font-size:1.2em}
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#toc.toc2>ul{font-size:.9em;margin-bottom:0}
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#toc.toc2 ul ul{margin-left:0;padding-left:1em}
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#toc.toc2 ul.sectlevel0 ul.sectlevel1{padding-left:0;margin-top:.5em;margin-bottom:.5em}
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body.toc2.toc-right{padding-left:0;padding-right:15em}
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body.toc2.toc-right #toc.toc2{border-right-width:0;border-left:1px solid #e7e7e9;left:auto;right:0}}
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@media screen and (min-width:1280px){body.toc2{padding-left:20em;padding-right:0}
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#toc.toc2{width:20em}
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#toc.toc2 #toctitle{font-size:1.375em}
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||
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#toc.toc2>ul{font-size:.95em}
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#toc.toc2 ul ul{padding-left:1.25em}
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body.toc2.toc-right{padding-left:0;padding-right:20em}}
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#content #toc{border-style:solid;border-width:1px;border-color:#e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;-webkit-border-radius:4px;border-radius:4px}
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#content #toc>:first-child{margin-top:0}
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#content #toc>:last-child{margin-bottom:0}
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#footer{max-width:100%;background-color:rgba(0,0,0,.8);padding:1.25em}
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||
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#footer-text{color:rgba(255,255,255,.8);line-height:1.44}
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#content{margin-bottom:.625em}
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.sect1{padding-bottom:.625em}
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@media screen and (min-width:768px){#content{margin-bottom:1.25em}
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.sect1{padding-bottom:1.25em}}
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||
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.sect1:last-child{padding-bottom:0}
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.sect1+.sect1{border-top:1px solid #e7e7e9}
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#content h1>a.anchor,h2>a.anchor,h3>a.anchor,#toctitle>a.anchor,.sidebarblock>.content>.title>a.anchor,h4>a.anchor,h5>a.anchor,h6>a.anchor{position:absolute;z-index:1001;width:1.5ex;margin-left:-1.5ex;display:block;text-decoration:none!important;visibility:hidden;text-align:center;font-weight:400}
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#content h1>a.anchor::before,h2>a.anchor::before,h3>a.anchor::before,#toctitle>a.anchor::before,.sidebarblock>.content>.title>a.anchor::before,h4>a.anchor::before,h5>a.anchor::before,h6>a.anchor::before{content:"\00A7";font-size:.85em;display:block;padding-top:.1em}
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#content h1:hover>a.anchor,#content h1>a.anchor:hover,h2:hover>a.anchor,h2>a.anchor:hover,h3:hover>a.anchor,#toctitle:hover>a.anchor,.sidebarblock>.content>.title:hover>a.anchor,h3>a.anchor:hover,#toctitle>a.anchor:hover,.sidebarblock>.content>.title>a.anchor:hover,h4:hover>a.anchor,h4>a.anchor:hover,h5:hover>a.anchor,h5>a.anchor:hover,h6:hover>a.anchor,h6>a.anchor:hover{visibility:visible}
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#content h1>a.link,h2>a.link,h3>a.link,#toctitle>a.link,.sidebarblock>.content>.title>a.link,h4>a.link,h5>a.link,h6>a.link{color:#ba3925;text-decoration:none}
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#content h1>a.link:hover,h2>a.link:hover,h3>a.link:hover,#toctitle>a.link:hover,.sidebarblock>.content>.title>a.link:hover,h4>a.link:hover,h5>a.link:hover,h6>a.link:hover{color:#a53221}
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.audioblock,.imageblock,.literalblock,.listingblock,.stemblock,.videoblock{margin-bottom:1.25em}
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.admonitionblock td.content>.title,.audioblock>.title,.exampleblock>.title,.imageblock>.title,.listingblock>.title,.literalblock>.title,.stemblock>.title,.openblock>.title,.paragraph>.title,.quoteblock>.title,table.tableblock>.title,.verseblock>.title,.videoblock>.title,.dlist>.title,.olist>.title,.ulist>.title,.qlist>.title,.hdlist>.title{text-rendering:optimizeLegibility;text-align:left;font-family:"Noto Serif","DejaVu Serif",serif;font-size:1rem;font-style:italic}
|
||
|
|
table.tableblock.fit-content>caption.title{white-space:nowrap;width:0}
|
||
|
|
.paragraph.lead>p,#preamble>.sectionbody>[class="paragraph"]:first-of-type p{font-size:1.21875em;line-height:1.6;color:rgba(0,0,0,.85)}
|
||
|
|
table.tableblock #preamble>.sectionbody>[class="paragraph"]:first-of-type p{font-size:inherit}
|
||
|
|
.admonitionblock>table{border-collapse:separate;border:0;background:none;width:100%}
|
||
|
|
.admonitionblock>table td.icon{text-align:center;width:80px}
|
||
|
|
.admonitionblock>table td.icon img{max-width:none}
|
||
|
|
.admonitionblock>table td.icon .title{font-weight:bold;font-family:"Open Sans","DejaVu Sans",sans-serif;text-transform:uppercase}
|
||
|
|
.admonitionblock>table td.content{padding-left:1.125em;padding-right:1.25em;border-left:1px solid #dddddf;color:rgba(0,0,0,.6)}
|
||
|
|
.admonitionblock>table td.content>:last-child>:last-child{margin-bottom:0}
|
||
|
|
.exampleblock>.content{border-style:solid;border-width:1px;border-color:#e6e6e6;margin-bottom:1.25em;padding:1.25em;background:#fff;-webkit-border-radius:4px;border-radius:4px}
|
||
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.exampleblock>.content>:first-child{margin-top:0}
|
||
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|
.exampleblock>.content>:last-child{margin-bottom:0}
|
||
|
|
.sidebarblock{border-style:solid;border-width:1px;border-color:#e0e0dc;margin-bottom:1.25em;padding:1.25em;background:#f8f8f7;-webkit-border-radius:4px;border-radius:4px}
|
||
|
|
.sidebarblock>:first-child{margin-top:0}
|
||
|
|
.sidebarblock>:last-child{margin-bottom:0}
|
||
|
|
.sidebarblock>.content>.title{color:#7a2518;margin-top:0;text-align:center}
|
||
|
|
.exampleblock>.content>:last-child>:last-child,.exampleblock>.content .olist>ol>li:last-child>:last-child,.exampleblock>.content .ulist>ul>li:last-child>:last-child,.exampleblock>.content .qlist>ol>li:last-child>:last-child,.sidebarblock>.content>:last-child>:last-child,.sidebarblock>.content .olist>ol>li:last-child>:last-child,.sidebarblock>.content .ulist>ul>li:last-child>:last-child,.sidebarblock>.content .qlist>ol>li:last-child>:last-child{margin-bottom:0}
|
||
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.literalblock pre,.listingblock pre:not(.highlight),.listingblock pre[class="highlight"],.listingblock pre[class^="highlight "],.listingblock pre.CodeRay,.listingblock pre.prettyprint{background:#f7f7f8}
|
||
|
|
.sidebarblock .literalblock pre,.sidebarblock .listingblock pre:not(.highlight),.sidebarblock .listingblock pre[class="highlight"],.sidebarblock .listingblock pre[class^="highlight "],.sidebarblock .listingblock pre.CodeRay,.sidebarblock .listingblock pre.prettyprint{background:#f2f1f1}
|
||
|
|
.literalblock pre,.literalblock pre[class],.listingblock pre,.listingblock pre[class]{-webkit-border-radius:4px;border-radius:4px;word-wrap:break-word;overflow-x:auto;padding:1em;font-size:.8125em}
|
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@media screen and (min-width:768px){.literalblock pre,.literalblock pre[class],.listingblock pre,.listingblock pre[class]{font-size:.90625em}}
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@media screen and (min-width:1280px){.literalblock pre,.literalblock pre[class],.listingblock pre,.listingblock pre[class]{font-size:1em}}
|
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.literalblock pre.nowrap,.literalblock pre.nowrap pre,.listingblock pre.nowrap,.listingblock pre.nowrap pre{white-space:pre;word-wrap:normal}
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.literalblock.output pre{color:#f7f7f8;background-color:rgba(0,0,0,.9)}
|
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.listingblock pre.highlightjs{padding:0}
|
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.listingblock pre.highlightjs>code{padding:1em;-webkit-border-radius:4px;border-radius:4px}
|
||
|
|
.listingblock pre.prettyprint{border-width:0}
|
||
|
|
.listingblock>.content{position:relative}
|
||
|
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.listingblock code[data-lang]::before{display:none;content:attr(data-lang);position:absolute;font-size:.75em;top:.425rem;right:.5rem;line-height:1;text-transform:uppercase;color:#999}
|
||
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.listingblock:hover code[data-lang]::before{display:block}
|
||
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.listingblock.terminal pre .command::before{content:attr(data-prompt);padding-right:.5em;color:#999}
|
||
|
|
.listingblock.terminal pre .command:not([data-prompt])::before{content:"$"}
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||
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table.pyhltable{border-collapse:separate;border:0;margin-bottom:0;background:none}
|
||
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table.pyhltable td{vertical-align:top;padding-top:0;padding-bottom:0;line-height:1.45}
|
||
|
|
table.pyhltable td.code{padding-left:.75em;padding-right:0}
|
||
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pre.pygments .lineno,table.pyhltable td:not(.code){color:#999;padding-left:0;padding-right:.5em;border-right:1px solid #dddddf}
|
||
|
|
pre.pygments .lineno{display:inline-block;margin-right:.25em}
|
||
|
|
table.pyhltable .linenodiv{background:none!important;padding-right:0!important}
|
||
|
|
.quoteblock{margin:0 1em 1.25em 1.5em;display:table}
|
||
|
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.quoteblock>.title{margin-left:-1.5em;margin-bottom:.75em}
|
||
|
|
.quoteblock blockquote,.quoteblock p{color:rgba(0,0,0,.85);font-size:1.15rem;line-height:1.75;word-spacing:.1em;letter-spacing:0;font-style:italic;text-align:justify}
|
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.quoteblock blockquote{margin:0;padding:0;border:0}
|
||
|
|
.quoteblock blockquote::before{content:"\201c";float:left;font-size:2.75em;font-weight:bold;line-height:.6em;margin-left:-.6em;color:#7a2518;text-shadow:0 1px 2px rgba(0,0,0,.1)}
|
||
|
|
.quoteblock blockquote>.paragraph:last-child p{margin-bottom:0}
|
||
|
|
.quoteblock .attribution{margin-top:.75em;margin-right:.5ex;text-align:right}
|
||
|
|
.verseblock{margin:0 1em 1.25em}
|
||
|
|
.verseblock pre{font-family:"Open Sans","DejaVu Sans",sans;font-size:1.15rem;color:rgba(0,0,0,.85);font-weight:300;text-rendering:optimizeLegibility}
|
||
|
|
.verseblock pre strong{font-weight:400}
|
||
|
|
.verseblock .attribution{margin-top:1.25rem;margin-left:.5ex}
|
||
|
|
.quoteblock .attribution,.verseblock .attribution{font-size:.9375em;line-height:1.45;font-style:italic}
|
||
|
|
.quoteblock .attribution br,.verseblock .attribution br{display:none}
|
||
|
|
.quoteblock .attribution cite,.verseblock .attribution cite{display:block;letter-spacing:-.025em;color:rgba(0,0,0,.6)}
|
||
|
|
.quoteblock.abstract blockquote::before,.quoteblock.excerpt blockquote::before,.quoteblock .quoteblock blockquote::before{display:none}
|
||
|
|
.quoteblock.abstract blockquote,.quoteblock.abstract p,.quoteblock.excerpt blockquote,.quoteblock.excerpt p,.quoteblock .quoteblock blockquote,.quoteblock .quoteblock p{line-height:1.6;word-spacing:0}
|
||
|
|
.quoteblock.abstract{margin:0 1em 1.25em;display:block}
|
||
|
|
.quoteblock.abstract>.title{margin:0 0 .375em;font-size:1.15em;text-align:center}
|
||
|
|
.quoteblock.excerpt,.quoteblock .quoteblock{margin:0 0 1.25em;padding:0 0 .25em 1em;border-left:.25em solid #dddddf}
|
||
|
|
.quoteblock.excerpt blockquote,.quoteblock.excerpt p,.quoteblock .quoteblock blockquote,.quoteblock .quoteblock p{color:inherit;font-size:1.0625rem}
|
||
|
|
.quoteblock.excerpt .attribution,.quoteblock .quoteblock .attribution{color:inherit;text-align:left;margin-right:0}
|
||
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|
table.tableblock{max-width:100%;border-collapse:separate}
|
||
|
|
p.tableblock:last-child{margin-bottom:0}
|
||
|
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td.tableblock>.content{margin-bottom:-1.25em}
|
||
|
|
table.tableblock,th.tableblock,td.tableblock{border:0 solid #dedede}
|
||
|
|
table.grid-all>thead>tr>.tableblock,table.grid-all>tbody>tr>.tableblock{border-width:0 1px 1px 0}
|
||
|
|
table.grid-all>tfoot>tr>.tableblock{border-width:1px 1px 0 0}
|
||
|
|
table.grid-cols>*>tr>.tableblock{border-width:0 1px 0 0}
|
||
|
|
table.grid-rows>thead>tr>.tableblock,table.grid-rows>tbody>tr>.tableblock{border-width:0 0 1px}
|
||
|
|
table.grid-rows>tfoot>tr>.tableblock{border-width:1px 0 0}
|
||
|
|
table.grid-all>*>tr>.tableblock:last-child,table.grid-cols>*>tr>.tableblock:last-child{border-right-width:0}
|
||
|
|
table.grid-all>tbody>tr:last-child>.tableblock,table.grid-all>thead:last-child>tr>.tableblock,table.grid-rows>tbody>tr:last-child>.tableblock,table.grid-rows>thead:last-child>tr>.tableblock{border-bottom-width:0}
|
||
|
|
table.frame-all{border-width:1px}
|
||
|
|
table.frame-sides{border-width:0 1px}
|
||
|
|
table.frame-topbot,table.frame-ends{border-width:1px 0}
|
||
|
|
table.stripes-all tr,table.stripes-odd tr:nth-of-type(odd){background:#f8f8f7}
|
||
|
|
table.stripes-none tr,table.stripes-odd tr:nth-of-type(even){background:none}
|
||
|
|
th.halign-left,td.halign-left{text-align:left}
|
||
|
|
th.halign-right,td.halign-right{text-align:right}
|
||
|
|
th.halign-center,td.halign-center{text-align:center}
|
||
|
|
th.valign-top,td.valign-top{vertical-align:top}
|
||
|
|
th.valign-bottom,td.valign-bottom{vertical-align:bottom}
|
||
|
|
th.valign-middle,td.valign-middle{vertical-align:middle}
|
||
|
|
table thead th,table tfoot th{font-weight:bold}
|
||
|
|
tbody tr th{display:table-cell;line-height:1.6;background:#f7f8f7}
|
||
|
|
tbody tr th,tbody tr th p,tfoot tr th,tfoot tr th p{color:rgba(0,0,0,.8);font-weight:bold}
|
||
|
|
p.tableblock>code:only-child{background:none;padding:0}
|
||
|
|
p.tableblock{font-size:1em}
|
||
|
|
td>div.verse{white-space:pre}
|
||
|
|
ol{margin-left:1.75em}
|
||
|
|
ul li ol{margin-left:1.5em}
|
||
|
|
dl dd{margin-left:1.125em}
|
||
|
|
dl dd:last-child,dl dd:last-child>:last-child{margin-bottom:0}
|
||
|
|
ol>li p,ul>li p,ul dd,ol dd,.olist .olist,.ulist .ulist,.ulist .olist,.olist .ulist{margin-bottom:.625em}
|
||
|
|
ul.checklist,ul.none,ol.none,ul.no-bullet,ol.no-bullet,ol.unnumbered,ul.unstyled,ol.unstyled{list-style-type:none}
|
||
|
|
ul.no-bullet,ol.no-bullet,ol.unnumbered{margin-left:.625em}
|
||
|
|
ul.unstyled,ol.unstyled{margin-left:0}
|
||
|
|
ul.checklist{margin-left:.625em}
|
||
|
|
ul.checklist li>p:first-child>.fa-square-o:first-child,ul.checklist li>p:first-child>.fa-check-square-o:first-child{width:1.25em;font-size:.8em;position:relative;bottom:.125em}
|
||
|
|
ul.checklist li>p:first-child>input[type="checkbox"]:first-child{margin-right:.25em}
|
||
|
|
ul.inline{display:-ms-flexbox;display:-webkit-box;display:flex;-ms-flex-flow:row wrap;-webkit-flex-flow:row wrap;flex-flow:row wrap;list-style:none;margin:0 0 .625em -1.25em}
|
||
|
|
ul.inline>li{margin-left:1.25em}
|
||
|
|
.unstyled dl dt{font-weight:400;font-style:normal}
|
||
|
|
ol.arabic{list-style-type:decimal}
|
||
|
|
ol.decimal{list-style-type:decimal-leading-zero}
|
||
|
|
ol.loweralpha{list-style-type:lower-alpha}
|
||
|
|
ol.upperalpha{list-style-type:upper-alpha}
|
||
|
|
ol.lowerroman{list-style-type:lower-roman}
|
||
|
|
ol.upperroman{list-style-type:upper-roman}
|
||
|
|
ol.lowergreek{list-style-type:lower-greek}
|
||
|
|
.hdlist>table,.colist>table{border:0;background:none}
|
||
|
|
.hdlist>table>tbody>tr,.colist>table>tbody>tr{background:none}
|
||
|
|
td.hdlist1,td.hdlist2{vertical-align:top;padding:0 .625em}
|
||
|
|
td.hdlist1{font-weight:bold;padding-bottom:1.25em}
|
||
|
|
.literalblock+.colist,.listingblock+.colist{margin-top:-.5em}
|
||
|
|
.colist td:not([class]):first-child{padding:.4em .75em 0;line-height:1;vertical-align:top}
|
||
|
|
.colist td:not([class]):first-child img{max-width:none}
|
||
|
|
.colist td:not([class]):last-child{padding:.25em 0}
|
||
|
|
.thumb,.th{line-height:0;display:inline-block;border:solid 4px #fff;-webkit-box-shadow:0 0 0 1px #ddd;box-shadow:0 0 0 1px #ddd}
|
||
|
|
.imageblock.left{margin:.25em .625em 1.25em 0}
|
||
|
|
.imageblock.right{margin:.25em 0 1.25em .625em}
|
||
|
|
.imageblock>.title{margin-bottom:0}
|
||
|
|
.imageblock.thumb,.imageblock.th{border-width:6px}
|
||
|
|
.imageblock.thumb>.title,.imageblock.th>.title{padding:0 .125em}
|
||
|
|
.image.left,.image.right{margin-top:.25em;margin-bottom:.25em;display:inline-block;line-height:0}
|
||
|
|
.image.left{margin-right:.625em}
|
||
|
|
.image.right{margin-left:.625em}
|
||
|
|
a.image{text-decoration:none;display:inline-block}
|
||
|
|
a.image object{pointer-events:none}
|
||
|
|
sup.footnote,sup.footnoteref{font-size:.875em;position:static;vertical-align:super}
|
||
|
|
sup.footnote a,sup.footnoteref a{text-decoration:none}
|
||
|
|
sup.footnote a:active,sup.footnoteref a:active{text-decoration:underline}
|
||
|
|
#footnotes{padding-top:.75em;padding-bottom:.75em;margin-bottom:.625em}
|
||
|
|
#footnotes hr{width:20%;min-width:6.25em;margin:-.25em 0 .75em;border-width:1px 0 0}
|
||
|
|
#footnotes .footnote{padding:0 .375em 0 .225em;line-height:1.3334;font-size:.875em;margin-left:1.2em;margin-bottom:.2em}
|
||
|
|
#footnotes .footnote a:first-of-type{font-weight:bold;text-decoration:none;margin-left:-1.05em}
|
||
|
|
#footnotes .footnote:last-of-type{margin-bottom:0}
|
||
|
|
#content #footnotes{margin-top:-.625em;margin-bottom:0;padding:.75em 0}
|
||
|
|
.gist .file-data>table{border:0;background:#fff;width:100%;margin-bottom:0}
|
||
|
|
.gist .file-data>table td.line-data{width:99%}
|
||
|
|
div.unbreakable{page-break-inside:avoid}
|
||
|
|
.big{font-size:larger}
|
||
|
|
.small{font-size:smaller}
|
||
|
|
.underline{text-decoration:underline}
|
||
|
|
.overline{text-decoration:overline}
|
||
|
|
.line-through{text-decoration:line-through}
|
||
|
|
.aqua{color:#00bfbf}
|
||
|
|
.aqua-background{background-color:#00fafa}
|
||
|
|
.black{color:#000}
|
||
|
|
.black-background{background-color:#000}
|
||
|
|
.blue{color:#0000bf}
|
||
|
|
.blue-background{background-color:#0000fa}
|
||
|
|
.fuchsia{color:#bf00bf}
|
||
|
|
.fuchsia-background{background-color:#fa00fa}
|
||
|
|
.gray{color:#606060}
|
||
|
|
.gray-background{background-color:#7d7d7d}
|
||
|
|
.green{color:#006000}
|
||
|
|
.green-background{background-color:#007d00}
|
||
|
|
.lime{color:#00bf00}
|
||
|
|
.lime-background{background-color:#00fa00}
|
||
|
|
.maroon{color:#600000}
|
||
|
|
.maroon-background{background-color:#7d0000}
|
||
|
|
.navy{color:#000060}
|
||
|
|
.navy-background{background-color:#00007d}
|
||
|
|
.olive{color:#606000}
|
||
|
|
.olive-background{background-color:#7d7d00}
|
||
|
|
.purple{color:#600060}
|
||
|
|
.purple-background{background-color:#7d007d}
|
||
|
|
.red{color:#bf0000}
|
||
|
|
.red-background{background-color:#fa0000}
|
||
|
|
.silver{color:#909090}
|
||
|
|
.silver-background{background-color:#bcbcbc}
|
||
|
|
.teal{color:#006060}
|
||
|
|
.teal-background{background-color:#007d7d}
|
||
|
|
.white{color:#bfbfbf}
|
||
|
|
.white-background{background-color:#fafafa}
|
||
|
|
.yellow{color:#bfbf00}
|
||
|
|
.yellow-background{background-color:#fafa00}
|
||
|
|
span.icon>.fa{cursor:default}
|
||
|
|
a span.icon>.fa{cursor:inherit}
|
||
|
|
.admonitionblock td.icon [class^="fa icon-"]{font-size:2.5em;text-shadow:1px 1px 2px rgba(0,0,0,.5);cursor:default}
|
||
|
|
.admonitionblock td.icon .icon-note::before{content:"\f05a";color:#19407c}
|
||
|
|
.admonitionblock td.icon .icon-tip::before{content:"\f0eb";text-shadow:1px 1px 2px rgba(155,155,0,.8);color:#111}
|
||
|
|
.admonitionblock td.icon .icon-warning::before{content:"\f071";color:#bf6900}
|
||
|
|
.admonitionblock td.icon .icon-caution::before{content:"\f06d";color:#bf3400}
|
||
|
|
.admonitionblock td.icon .icon-important::before{content:"\f06a";color:#bf0000}
|
||
|
|
.conum[data-value]{display:inline-block;color:#fff!important;background-color:rgba(0,0,0,.8);-webkit-border-radius:100px;border-radius:100px;text-align:center;font-size:.75em;width:1.67em;height:1.67em;line-height:1.67em;font-family:"Open Sans","DejaVu Sans",sans-serif;font-style:normal;font-weight:bold}
|
||
|
|
.conum[data-value] *{color:#fff!important}
|
||
|
|
.conum[data-value]+b{display:none}
|
||
|
|
.conum[data-value]::after{content:attr(data-value)}
|
||
|
|
pre .conum[data-value]{position:relative;top:-.125em}
|
||
|
|
b.conum *{color:inherit!important}
|
||
|
|
.conum:not([data-value]):empty{display:none}
|
||
|
|
dt,th.tableblock,td.content,div.footnote{text-rendering:optimizeLegibility}
|
||
|
|
h1,h2,p,td.content,span.alt{letter-spacing:-.01em}
|
||
|
|
p strong,td.content strong,div.footnote strong{letter-spacing:-.005em}
|
||
|
|
p,blockquote,dt,td.content,span.alt{font-size:1.0625rem}
|
||
|
|
p{margin-bottom:1.25rem}
|
||
|
|
.sidebarblock p,.sidebarblock dt,.sidebarblock td.content,p.tableblock{font-size:1em}
|
||
|
|
.exampleblock>.content{background-color:#fffef7;border-color:#e0e0dc;-webkit-box-shadow:0 1px 4px #e0e0dc;box-shadow:0 1px 4px #e0e0dc}
|
||
|
|
.print-only{display:none!important}
|
||
|
|
@page{margin:1.25cm .75cm}
|
||
|
|
@media print{*{-webkit-box-shadow:none!important;box-shadow:none!important;text-shadow:none!important}
|
||
|
|
html{font-size:80%}
|
||
|
|
a{color:inherit!important;text-decoration:underline!important}
|
||
|
|
a.bare,a[href^="#"],a[href^="mailto:"]{text-decoration:none!important}
|
||
|
|
a[href^="http:"]:not(.bare)::after,a[href^="https:"]:not(.bare)::after{content:"(" attr(href) ")";display:inline-block;font-size:.875em;padding-left:.25em}
|
||
|
|
abbr[title]::after{content:" (" attr(title) ")"}
|
||
|
|
pre,blockquote,tr,img,object,svg{page-break-inside:avoid}
|
||
|
|
thead{display:table-header-group}
|
||
|
|
svg{max-width:100%}
|
||
|
|
p,blockquote,dt,td.content{font-size:1em;orphans:3;widows:3}
|
||
|
|
h2,h3,#toctitle,.sidebarblock>.content>.title{page-break-after:avoid}
|
||
|
|
#toc,.sidebarblock,.exampleblock>.content{background:none!important}
|
||
|
|
#toc{border-bottom:1px solid #dddddf!important;padding-bottom:0!important}
|
||
|
|
body.book #header{text-align:center}
|
||
|
|
body.book #header>h1:first-child{border:0!important;margin:2.5em 0 1em}
|
||
|
|
body.book #header .details{border:0!important;display:block;padding:0!important}
|
||
|
|
body.book #header .details span:first-child{margin-left:0!important}
|
||
|
|
body.book #header .details br{display:block}
|
||
|
|
body.book #header .details br+span::before{content:none!important}
|
||
|
|
body.book #toc{border:0!important;text-align:left!important;padding:0!important;margin:0!important}
|
||
|
|
body.book #toc,body.book #preamble,body.book h1.sect0,body.book .sect1>h2{page-break-before:always}
|
||
|
|
.listingblock code[data-lang]::before{display:block}
|
||
|
|
#footer{padding:0 .9375em}
|
||
|
|
.hide-on-print{display:none!important}
|
||
|
|
.print-only{display:block!important}
|
||
|
|
.hide-for-print{display:none!important}
|
||
|
|
.show-for-print{display:inherit!important}}
|
||
|
|
@media print,amzn-kf8{#header>h1:first-child{margin-top:1.25rem}
|
||
|
|
.sect1{padding:0!important}
|
||
|
|
.sect1+.sect1{border:0}
|
||
|
|
#footer{background:none}
|
||
|
|
#footer-text{color:rgba(0,0,0,.6);font-size:.9em}}
|
||
|
|
@media amzn-kf8{#header,#content,#footnotes,#footer{padding:0}}
|
||
|
|
</style>
|
||
|
|
</head>
|
||
|
|
<body class="manpage">
|
||
|
|
<div id="header">
|
||
|
|
<h1>git-bisect(1) Manual Page</h1>
|
||
|
|
<h2 id="_name">NAME</h2>
|
||
|
|
<div class="sectionbody">
|
||
|
|
<p>git-bisect - Use binary search to find the commit that introduced a bug</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div id="content">
|
||
|
|
<div class="sect1">
|
||
|
|
<h2 id="_synopsis">SYNOPSIS</h2>
|
||
|
|
<div class="sectionbody">
|
||
|
|
<div class="verseblock">
|
||
|
|
<pre class="content"><em>git bisect</em> <subcommand> <options></pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect1">
|
||
|
|
<h2 id="_description">DESCRIPTION</h2>
|
||
|
|
<div class="sectionbody">
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>The command takes various subcommands, and different options depending
|
||
|
|
on the subcommand:</p>
|
||
|
|
</div>
|
||
|
|
<div class="literalblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>git bisect start [--term-{old,good}=<term> --term-{new,bad}=<term>]
|
||
|
|
[--no-checkout] [<bad> [<good>...]] [--] [<paths>...]
|
||
|
|
git bisect (bad|new|<term-new>) [<rev>]
|
||
|
|
git bisect (good|old|<term-old>) [<rev>...]
|
||
|
|
git bisect terms [--term-good | --term-bad]
|
||
|
|
git bisect skip [(<rev>|<range>)...]
|
||
|
|
git bisect reset [<commit>]
|
||
|
|
git bisect (visualize|view)
|
||
|
|
git bisect replay <logfile>
|
||
|
|
git bisect log
|
||
|
|
git bisect run <cmd>...
|
||
|
|
git bisect help</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>This command uses a binary search algorithm to find which commit in
|
||
|
|
your project’s history introduced a bug. You use it by first telling
|
||
|
|
it a "bad" commit that is known to contain the bug, and a "good"
|
||
|
|
commit that is known to be before the bug was introduced. Then <code>git
|
||
|
|
bisect</code> picks a commit between those two endpoints and asks you
|
||
|
|
whether the selected commit is "good" or "bad". It continues narrowing
|
||
|
|
down the range until it finds the exact commit that introduced the
|
||
|
|
change.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>In fact, <code>git bisect</code> can be used to find the commit that changed
|
||
|
|
<strong>any</strong> property of your project; e.g., the commit that fixed a bug, or
|
||
|
|
the commit that caused a benchmark’s performance to improve. To
|
||
|
|
support this more general usage, the terms "old" and "new" can be used
|
||
|
|
in place of "good" and "bad", or you can choose your own terms. See
|
||
|
|
section "Alternate terms" below for more information.</p>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_basic_bisect_commands_start_bad_good">Basic bisect commands: start, bad, good</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>As an example, suppose you are trying to find the commit that broke a
|
||
|
|
feature that was known to work in version <code>v2.6.13-rc2</code> of your
|
||
|
|
project. You start a bisect session as follows:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start
|
||
|
|
$ git bisect bad # Current version is bad
|
||
|
|
$ git bisect good v2.6.13-rc2 # v2.6.13-rc2 is known to be good</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Once you have specified at least one bad and one good commit, <code>git
|
||
|
|
bisect</code> selects a commit in the middle of that range of history,
|
||
|
|
checks it out, and outputs something similar to the following:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>Bisecting: 675 revisions left to test after this (roughly 10 steps)</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>You should now compile the checked-out version and test it. If that
|
||
|
|
version works correctly, type</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect good</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If that version is broken, type</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect bad</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Then <code>git bisect</code> will respond with something like</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>Bisecting: 337 revisions left to test after this (roughly 9 steps)</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Keep repeating the process: compile the tree, test it, and depending
|
||
|
|
on whether it is good or bad run <code>git bisect good</code> or <code>git bisect bad</code>
|
||
|
|
to ask for the next commit that needs testing.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Eventually there will be no more revisions left to inspect, and the
|
||
|
|
command will print out a description of the first bad commit. The
|
||
|
|
reference <code>refs/bisect/bad</code> will be left pointing at that commit.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_bisect_reset">Bisect reset</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>After a bisect session, to clean up the bisection state and return to
|
||
|
|
the original HEAD, issue the following command:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect reset</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>By default, this will return your tree to the commit that was checked
|
||
|
|
out before <code>git bisect start</code>. (A new <code>git bisect start</code> will also do
|
||
|
|
that, as it cleans up the old bisection state.)</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>With an optional argument, you can return to a different commit
|
||
|
|
instead:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect reset <commit></pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>For example, <code>git bisect reset bisect/bad</code> will check out the first
|
||
|
|
bad revision, while <code>git bisect reset HEAD</code> will leave you on the
|
||
|
|
current bisection commit and avoid switching commits at all.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_alternate_terms">Alternate terms</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Sometimes you are not looking for the commit that introduced a
|
||
|
|
breakage, but rather for a commit that caused a change between some
|
||
|
|
other "old" state and "new" state. For example, you might be looking
|
||
|
|
for the commit that introduced a particular fix. Or you might be
|
||
|
|
looking for the first commit in which the source-code filenames were
|
||
|
|
finally all converted to your company’s naming standard. Or whatever.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>In such cases it can be very confusing to use the terms "good" and
|
||
|
|
"bad" to refer to "the state before the change" and "the state after
|
||
|
|
the change". So instead, you can use the terms "old" and "new",
|
||
|
|
respectively, in place of "good" and "bad". (But note that you cannot
|
||
|
|
mix "good" and "bad" with "old" and "new" in a single session.)</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>In this more general usage, you provide <code>git bisect</code> with a "new"
|
||
|
|
commit that has some property and an "old" commit that doesn’t have that
|
||
|
|
property. Each time <code>git bisect</code> checks out a commit, you test if that
|
||
|
|
commit has the property. If it does, mark the commit as "new";
|
||
|
|
otherwise, mark it as "old". When the bisection is done, <code>git bisect</code>
|
||
|
|
will report which commit introduced the property.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>To use "old" and "new" instead of "good" and bad, you must run <code>git
|
||
|
|
bisect start</code> without commits as argument and then run the following
|
||
|
|
commands to add the commits:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>git bisect old [<rev>]</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>to indicate that a commit was before the sought change, or</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>git bisect new [<rev>...]</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>to indicate that it was after.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>To get a reminder of the currently used terms, use</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>git bisect terms</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>You can get just the old (respectively new) term with <code>git bisect terms
|
||
|
|
--term-old</code> or <code>git bisect terms --term-good</code>.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If you would like to use your own terms instead of "bad"/"good" or
|
||
|
|
"new"/"old", you can choose any names you like (except existing bisect
|
||
|
|
subcommands like <code>reset</code>, <code>start</code>, …​) by starting the
|
||
|
|
bisection using</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>git bisect start --term-old <term-old> --term-new <term-new></pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>For example, if you are looking for a commit that introduced a
|
||
|
|
performance regression, you might use</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>git bisect start --term-old fast --term-new slow</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Or if you are looking for the commit that fixed a bug, you might use</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>git bisect start --term-new fixed --term-old broken</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Then, use <code>git bisect <term-old></code> and <code>git bisect <term-new></code> instead
|
||
|
|
of <code>git bisect good</code> and <code>git bisect bad</code> to mark commits.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_bisect_visualizeview">Bisect visualize/view</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>To see the currently remaining suspects in <em>gitk</em>, issue the following
|
||
|
|
command during the bisection process (the subcommand <code>view</code> can be used
|
||
|
|
as an alternative to <code>visualize</code>):</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect visualize</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If the <code>DISPLAY</code> environment variable is not set, <em>git log</em> is used
|
||
|
|
instead. You can also give command-line options such as <code>-p</code> and
|
||
|
|
<code>--stat</code>.</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect visualize --stat</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_bisect_log_and_bisect_replay">Bisect log and bisect replay</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>After having marked revisions as good or bad, issue the following
|
||
|
|
command to show what has been done so far:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect log</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If you discover that you made a mistake in specifying the status of a
|
||
|
|
revision, you can save the output of this command to a file, edit it to
|
||
|
|
remove the incorrect entries, and then issue the following commands to
|
||
|
|
return to a corrected state:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect reset
|
||
|
|
$ git bisect replay that-file</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_avoiding_testing_a_commit">Avoiding testing a commit</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If, in the middle of a bisect session, you know that the suggested
|
||
|
|
revision is not a good one to test (e.g. it fails to build and you
|
||
|
|
know that the failure does not have anything to do with the bug you
|
||
|
|
are chasing), you can manually select a nearby commit and test that
|
||
|
|
one instead.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>For example:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect good/bad # previous round was good or bad.
|
||
|
|
Bisecting: 337 revisions left to test after this (roughly 9 steps)
|
||
|
|
$ git bisect visualize # oops, that is uninteresting.
|
||
|
|
$ git reset --hard HEAD~3 # try 3 revisions before what
|
||
|
|
# was suggested</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Then compile and test the chosen revision, and afterwards mark
|
||
|
|
the revision as good or bad in the usual manner.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_bisect_skip">Bisect skip</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Instead of choosing a nearby commit by yourself, you can ask Git to do
|
||
|
|
it for you by issuing the command:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect skip # Current version cannot be tested</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>However, if you skip a commit adjacent to the one you are looking for,
|
||
|
|
Git will be unable to tell exactly which of those commits was the
|
||
|
|
first bad one.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>You can also skip a range of commits, instead of just one commit,
|
||
|
|
using range notation. For example:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect skip v2.5..v2.6</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>This tells the bisect process that no commit after <code>v2.5</code>, up to and
|
||
|
|
including <code>v2.6</code>, should be tested.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Note that if you also want to skip the first commit of the range you
|
||
|
|
would issue the command:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect skip v2.5 v2.5..v2.6</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>This tells the bisect process that the commits between <code>v2.5</code> and
|
||
|
|
<code>v2.6</code> (inclusive) should be skipped.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_cutting_down_bisection_by_giving_more_parameters_to_bisect_start">Cutting down bisection by giving more parameters to bisect start</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>You can further cut down the number of trials, if you know what part of
|
||
|
|
the tree is involved in the problem you are tracking down, by specifying
|
||
|
|
path parameters when issuing the <code>bisect start</code> command:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start -- arch/i386 include/asm-i386</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If you know beforehand more than one good commit, you can narrow the
|
||
|
|
bisect space down by specifying all of the good commits immediately after
|
||
|
|
the bad commit when issuing the <code>bisect start</code> command:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start v2.6.20-rc6 v2.6.20-rc4 v2.6.20-rc1 --
|
||
|
|
# v2.6.20-rc6 is bad
|
||
|
|
# v2.6.20-rc4 and v2.6.20-rc1 are good</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_bisect_run">Bisect run</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If you have a script that can tell if the current source code is good
|
||
|
|
or bad, you can bisect by issuing the command:</p>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect run my_script arguments</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Note that the script (<code>my_script</code> in the above example) should exit
|
||
|
|
with code 0 if the current source code is good/old, and exit with a
|
||
|
|
code between 1 and 127 (inclusive), except 125, if the current source
|
||
|
|
code is bad/new.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Any other exit code will abort the bisect process. It should be noted
|
||
|
|
that a program that terminates via <code>exit(-1)</code> leaves $? = 255, (see the
|
||
|
|
exit(3) manual page), as the value is chopped with <code>& 0377</code>.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>The special exit code 125 should be used when the current source code
|
||
|
|
cannot be tested. If the script exits with this code, the current
|
||
|
|
revision will be skipped (see <code>git bisect skip</code> above). 125 was chosen
|
||
|
|
as the highest sensible value to use for this purpose, because 126 and 127
|
||
|
|
are used by POSIX shells to signal specific error status (127 is for
|
||
|
|
command not found, 126 is for command found but not executable—​these
|
||
|
|
details do not matter, as they are normal errors in the script, as far as
|
||
|
|
<code>bisect run</code> is concerned).</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>You may often find that during a bisect session you want to have
|
||
|
|
temporary modifications (e.g. s/#define DEBUG 0/#define DEBUG 1/ in a
|
||
|
|
header file, or "revision that does not have this commit needs this
|
||
|
|
patch applied to work around another problem this bisection is not
|
||
|
|
interested in") applied to the revision being tested.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>To cope with such a situation, after the inner <em>git bisect</em> finds the
|
||
|
|
next revision to test, the script can apply the patch
|
||
|
|
before compiling, run the real test, and afterwards decide if the
|
||
|
|
revision (possibly with the needed patch) passed the test and then
|
||
|
|
rewind the tree to the pristine state. Finally the script should exit
|
||
|
|
with the status of the real test to let the <code>git bisect run</code> command loop
|
||
|
|
determine the eventual outcome of the bisect session.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect1">
|
||
|
|
<h2 id="_options">OPTIONS</h2>
|
||
|
|
<div class="sectionbody">
|
||
|
|
<div class="dlist">
|
||
|
|
<dl>
|
||
|
|
<dt class="hdlist1">--no-checkout</dt>
|
||
|
|
<dd>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Do not checkout the new working tree at each iteration of the bisection
|
||
|
|
process. Instead just update a special reference named <code>BISECT_HEAD</code> to make
|
||
|
|
it point to the commit that should be tested.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>This option may be useful when the test you would perform in each step
|
||
|
|
does not require a checked out tree.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>If the repository is bare, <code>--no-checkout</code> is assumed.</p>
|
||
|
|
</div>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect1">
|
||
|
|
<h2 id="_examples">EXAMPLES</h2>
|
||
|
|
<div class="sectionbody">
|
||
|
|
<div class="ulist">
|
||
|
|
<ul>
|
||
|
|
<li>
|
||
|
|
<p>Automatically bisect a broken build between v1.2 and HEAD:</p>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start HEAD v1.2 -- # HEAD is bad, v1.2 is good
|
||
|
|
$ git bisect run make # "make" builds the app
|
||
|
|
$ git bisect reset # quit the bisect session</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<p>Automatically bisect a test failure between origin and HEAD:</p>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start HEAD origin -- # HEAD is bad, origin is good
|
||
|
|
$ git bisect run make test # "make test" builds and tests
|
||
|
|
$ git bisect reset # quit the bisect session</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<p>Automatically bisect a broken test case:</p>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ cat ~/test.sh
|
||
|
|
#!/bin/sh
|
||
|
|
make || exit 125 # this skips broken builds
|
||
|
|
~/check_test_case.sh # does the test case pass?
|
||
|
|
$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10
|
||
|
|
$ git bisect run ~/test.sh
|
||
|
|
$ git bisect reset # quit the bisect session</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Here we use a <code>test.sh</code> custom script. In this script, if <code>make</code>
|
||
|
|
fails, we skip the current commit.
|
||
|
|
<code>check_test_case.sh</code> should <code>exit 0</code> if the test case passes,
|
||
|
|
and <code>exit 1</code> otherwise.</p>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>It is safer if both <code>test.sh</code> and <code>check_test_case.sh</code> are
|
||
|
|
outside the repository to prevent interactions between the bisect,
|
||
|
|
make and test processes and the scripts.</p>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<p>Automatically bisect with temporary modifications (hot-fix):</p>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ cat ~/test.sh
|
||
|
|
#!/bin/sh
|
||
|
|
|
||
|
|
# tweak the working tree by merging the hot-fix branch
|
||
|
|
# and then attempt a build
|
||
|
|
if git merge --no-commit hot-fix &&
|
||
|
|
make
|
||
|
|
then
|
||
|
|
# run project specific test and report its status
|
||
|
|
~/check_test_case.sh
|
||
|
|
status=$?
|
||
|
|
else
|
||
|
|
# tell the caller this is untestable
|
||
|
|
status=125
|
||
|
|
fi
|
||
|
|
|
||
|
|
# undo the tweak to allow clean flipping to the next commit
|
||
|
|
git reset --hard
|
||
|
|
|
||
|
|
# return control
|
||
|
|
exit $status</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>This applies modifications from a hot-fix branch before each test run,
|
||
|
|
e.g. in case your build or test environment changed so that older
|
||
|
|
revisions may need a fix which newer ones have already. (Make sure the
|
||
|
|
hot-fix branch is based off a commit which is contained in all revisions
|
||
|
|
which you are bisecting, so that the merge does not pull in too much, or
|
||
|
|
use <code>git cherry-pick</code> instead of <code>git merge</code>.)</p>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<p>Automatically bisect a broken test case:</p>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start HEAD HEAD~10 -- # culprit is among the last 10
|
||
|
|
$ git bisect run sh -c "make || exit 125; ~/check_test_case.sh"
|
||
|
|
$ git bisect reset # quit the bisect session</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>This shows that you can do without a run script if you write the test
|
||
|
|
on a single line.</p>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<p>Locate a good region of the object graph in a damaged repository</p>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start HEAD <known-good-commit> [ <boundary-commit> ... ] --no-checkout
|
||
|
|
$ git bisect run sh -c '
|
||
|
|
GOOD=$(git for-each-ref "--format=%(objectname)" refs/bisect/good-*) &&
|
||
|
|
git rev-list --objects BISECT_HEAD --not $GOOD >tmp.$$ &&
|
||
|
|
git pack-objects --stdout >/dev/null <tmp.$$
|
||
|
|
rc=$?
|
||
|
|
rm -f tmp.$$
|
||
|
|
test $rc = 0'
|
||
|
|
|
||
|
|
$ git bisect reset # quit the bisect session</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>In this case, when <em>git bisect run</em> finishes, bisect/bad will refer to a commit that
|
||
|
|
has at least one parent whose reachable graph is fully traversable in the sense
|
||
|
|
required by <em>git pack objects</em>.</p>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
<li>
|
||
|
|
<p>Look for a fix instead of a regression in the code</p>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start
|
||
|
|
$ git bisect new HEAD # current commit is marked as new
|
||
|
|
$ git bisect old HEAD~10 # the tenth commit from now is marked as old</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>or:</p>
|
||
|
|
</div>
|
||
|
|
</li>
|
||
|
|
</ul>
|
||
|
|
</div>
|
||
|
|
<div class="listingblock">
|
||
|
|
<div class="content">
|
||
|
|
<pre>$ git bisect start --term-old broken --term-new fixed
|
||
|
|
$ git bisect fixed
|
||
|
|
$ git bisect broken HEAD~10</pre>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect2">
|
||
|
|
<h3 id="_getting_help">Getting help</h3>
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Use <code>git bisect</code> to get a short usage description, and <code>git bisect
|
||
|
|
help</code> or <code>git bisect -h</code> to get a long usage description.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect1">
|
||
|
|
<h2 id="_see_also">SEE ALSO</h2>
|
||
|
|
<div class="sectionbody">
|
||
|
|
<div class="paragraph">
|
||
|
|
<p><a href="git-bisect-lk2009.html">Fighting regressions with git bisect</a>,
|
||
|
|
<a href="git-blame.html">git-blame</a>(1).</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="sect1">
|
||
|
|
<h2 id="_git">GIT</h2>
|
||
|
|
<div class="sectionbody">
|
||
|
|
<div class="paragraph">
|
||
|
|
<p>Part of the <a href="git.html">git</a>(1) suite</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div id="footer">
|
||
|
|
<div id="footer-text">
|
||
|
|
Last updated 2019-02-26 19:31:11 UTC
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|