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| <title>git-rerere(1)</title> | |
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| /* | |
| * xhtml11 specific | |
| * | |
| * */ | |
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| /* | |
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| * | |
| * */ | |
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| } | |
| /* | |
| * manpage specific | |
| * | |
| * */ | |
| body.manpage h1 { | |
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| } | |
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| body.manpage div.sectionbody { | |
| margin-left: 3em; | |
| } | |
| @media print { | |
| body.manpage div#toc { display: none; } | |
| } | |
| </style> | |
| <script type="text/javascript"> | |
| /*<+'])'); | |
| // Function that scans the DOM tree for header elements (the DOM2 | |
| // nodeIterator API would be a better technique but not supported by all | |
| // browsers). | |
| var iterate = function (el) { | |
| for (var i = el.firstChild; i != null; i = i.nextSibling) { | |
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| if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") { | |
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| iterate(i); | |
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| } | |
| } | |
| iterate(el); | |
| return result; | |
| } | |
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| if (!toc) { | |
| return; | |
| } | |
| // Delete existing TOC entries in case we're reloading the TOC. | |
| var tocEntriesToRemove = []; | |
| var i; | |
| for (i = 0; i < toc.childNodes.length; i++) { | |
| var entry = toc.childNodes[i]; | |
| if (entry.nodeName.toLowerCase() == 'div' | |
| && entry.getAttribute("class") | |
| && entry.getAttribute("class").match(/^toclevel/)) | |
| tocEntriesToRemove.push(entry); | |
| } | |
| for (i = 0; i < tocEntriesToRemove.length; i++) { | |
| toc.removeChild(tocEntriesToRemove[i]); | |
| } | |
| // Rebuild TOC entries. | |
| var entries = tocEntries(document.getElementById("content"), toclevels); | |
| for (var i = 0; i < entries.length; ++i) { | |
| var entry = entries[i]; | |
| if (entry.element.id == "") | |
| entry.element.id = "_toc_" + i; | |
| var a = document.createElement("a"); | |
| a.href = "#" + entry.element.id; | |
| a.appendChild(document.createTextNode(entry.text)); | |
| var div = document.createElement("div"); | |
| div.appendChild(a); | |
| div.className = "toclevel" + entry.toclevel; | |
| toc.appendChild(div); | |
| } | |
| if (entries.length == 0) | |
| toc.parentNode.removeChild(toc); | |
| }, | |
| ///////////////////////////////////////////////////////////////////// | |
| // Footnotes generator | |
| ///////////////////////////////////////////////////////////////////// | |
| /* Based on footnote generation code from: | |
| * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html | |
| */ | |
| footnotes: function () { | |
| // Delete existing footnote entries in case we're reloading the footnodes. | |
| var i; | |
| var noteholder = document.getElementById("footnotes"); | |
| if (!noteholder) { | |
| return; | |
| } | |
| var entriesToRemove = []; | |
| for (i = 0; i < noteholder.childNodes.length; i++) { | |
| var entry = noteholder.childNodes[i]; | |
| if (entry.nodeName.toLowerCase() == 'div' && entry.getAttribute("class") == "footnote") | |
| entriesToRemove.push(entry); | |
| } | |
| for (i = 0; i < entriesToRemove.length; i++) { | |
| noteholder.removeChild(entriesToRemove[i]); | |
| } | |
| // Rebuild footnote entries. | |
| var cont = document.getElementById("content"); | |
| var spans = cont.getElementsByTagName("span"); | |
| var refs = {}; | |
| var n = 0; | |
| for (i=0; i<spans.length; i++) { | |
| if (spans[i].className == "footnote") { | |
| n++; | |
| var note = spans[i].getAttribute("data-note"); | |
| if (!note) { | |
| // Use [\s\S] in place of . so multi-line matches work. | |
| // Because JavaScript has no s (dotall) regex flag. | |
| note = spans[i].innerHTML.match(/\s*\[([\s\S]*)]\s*/)[1]; | |
| spans[i].innerHTML = | |
| "[<a id='_footnoteref_" + n + "' href='#_footnote_" + n + | |
| "' title='View footnote' class='footnote'>" + n + "</a>]"; | |
| spans[i].setAttribute("data-note", note); | |
| } | |
| noteholder.innerHTML += | |
| "<div class='footnote' id='_footnote_" + n + "'>" + | |
| "<a href='#_footnoteref_" + n + "' title='Return to text'>" + | |
| n + "</a>. " + note + "</div>"; | |
| var id =spans[i].getAttribute("id"); | |
| if (id != null) refs["#"+id] = n; | |
| } | |
| } | |
| if (n == 0) | |
| noteholder.parentNode.removeChild(noteholder); | |
| else { | |
| // Process footnoterefs. | |
| for (i=0; i<spans.length; i++) { | |
| if (spans[i].className == "footnoteref") { | |
| var href = spans[i].getElementsByTagName("a")[0].getAttribute("href"); | |
| href = href.match(/#.*/)[0]; // Because IE return full URL. | |
| n = refs[href]; | |
| spans[i].innerHTML = | |
| "[<a href='#_footnote_" + n + | |
| "' title='View footnote' class='footnote'>" + n + "</a>]"; | |
| } | |
| } | |
| } | |
| }, | |
| install: function(toclevels) { | |
| var timerId; | |
| function reinstall() { | |
| asciidoc.footnotes(); | |
| if (toclevels) { | |
| asciidoc.toc(toclevels); | |
| } | |
| } | |
| function reinstallAndRemoveTimer() { | |
| clearInterval(timerId); | |
| reinstall(); | |
| } | |
| timerId = setInterval(reinstall, 500); | |
| if (document.addEventListener) | |
| document.addEventListener("DOMContentLoaded", reinstallAndRemoveTimer, false); | |
| else | |
| window.onload = reinstallAndRemoveTimer; | |
| } | |
| } | |
| asciidoc.install(); | |
| /*]]>*/ | |
| </script> | |
| </head> | |
| <body class="manpage"> | |
| <div id="header"> | |
| <h1> | |
| git-rerere(1) Manual Page | |
| </h1> | |
| <h2>NAME</h2> | |
| <div class="sectionbody"> | |
| <p>git-rerere - | |
| Reuse recorded resolution of conflicted merges | |
| </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 rerere</em> [<em>clear</em>|<em>forget</em> <pathspec>|<em>diff</em>|<em>remaining</em>|<em>status</em>|<em>gc</em>]</pre> | |
| <div class="attribution"> | |
| </div></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_description">DESCRIPTION</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>In a workflow employing relatively long lived topic branches, | |
| the developer sometimes needs to resolve the same conflicts over | |
| and over again until the topic branches are done (either merged | |
| to the "release" branch, or sent out and accepted upstream).</p></div> | |
| <div class="paragraph"><p>This command assists the developer in this process by recording | |
| conflicted automerge results and corresponding hand resolve results | |
| on the initial manual merge, and applying previously recorded | |
| hand resolutions to their corresponding automerge results.</p></div> | |
| <div class="admonitionblock"> | |
| <table><tr> | |
| <td class="icon"> | |
| <div class="title">Note</div> | |
| </td> | |
| <td class="content">You need to set the configuration variable rerere.enabled in order to | |
| enable this command.</td> | |
| </tr></table> | |
| </div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_commands">COMMANDS</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>Normally, <em>git rerere</em> is run without arguments or user-intervention. | |
| However, it has several commands that allow it to interact with | |
| its working state.</p></div> | |
| <div class="dlist"><dl> | |
| <dt class="hdlist1"> | |
| <em>clear</em> | |
| </dt> | |
| <dd> | |
| <p> | |
| Reset the metadata used by rerere if a merge resolution is to be | |
| aborted. Calling <em>git am [--skip|--abort]</em> or <em>git rebase [--skip|--abort]</em> | |
| will automatically invoke this command. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <em>forget</em> <pathspec> | |
| </dt> | |
| <dd> | |
| <p> | |
| Reset the conflict resolutions which rerere has recorded for the current | |
| conflict in <pathspec>. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <em>diff</em> | |
| </dt> | |
| <dd> | |
| <p> | |
| Display diffs for the current state of the resolution. It is | |
| useful for tracking what has changed while the user is resolving | |
| conflicts. Additional arguments are passed directly to the system | |
| <em>diff</em> command installed in PATH. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <em>status</em> | |
| </dt> | |
| <dd> | |
| <p> | |
| Print paths with conflicts whose merge resolution rerere will record. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <em>remaining</em> | |
| </dt> | |
| <dd> | |
| <p> | |
| Print paths with conflicts that have not been autoresolved by rerere. | |
| This includes paths whose resolutions cannot be tracked by rerere, | |
| such as conflicting submodules. | |
| </p> | |
| </dd> | |
| <dt class="hdlist1"> | |
| <em>gc</em> | |
| </dt> | |
| <dd> | |
| <p> | |
| Prune records of conflicted merges that | |
| occurred a long time ago. By default, unresolved conflicts older | |
| than 15 days and resolved conflicts older than 60 | |
| days are pruned. These defaults are controlled via the | |
| <code>gc.rerereUnresolved</code> and <code>gc.rerereResolved</code> configuration | |
| variables respectively. | |
| </p> | |
| </dd> | |
| </dl></div> | |
| </div> | |
| </div> | |
| <div class="sect1"> | |
| <h2 id="_discussion">DISCUSSION</h2> | |
| <div class="sectionbody"> | |
| <div class="paragraph"><p>When your topic branch modifies an overlapping area that your | |
| master branch (or upstream) touched since your topic branch | |
| forked from it, you may want to test it with the latest master, | |
| even before your topic branch is ready to be pushed upstream:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code> o---*---o topic | |
| / | |
| o---o---o---*---o---o master</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>For such a test, you need to merge master and topic somehow. | |
| One way to do it is to pull master into the topic branch:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code> $ git checkout topic | |
| $ git merge master | |
| o---*---o---+ topic | |
| / / | |
| o---o---o---*---o---o master</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>The commits marked with <code>*</code> touch the same area in the same | |
| file; you need to resolve the conflicts when creating the commit | |
| marked with <code>+</code>. Then you can test the result to make sure your | |
| work-in-progress still works with what is in the latest master.</p></div> | |
| <div class="paragraph"><p>After this test merge, there are two ways to continue your work | |
| on the topic. The easiest is to build on top of the test merge | |
| commit <code>+</code>, and when your work in the topic branch is finally | |
| ready, pull the topic branch into master, and/or ask the | |
| upstream to pull from you. By that time, however, the master or | |
| the upstream might have been advanced since the test merge <code>+</code>, | |
| in which case the final commit graph would look like this:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code> $ git checkout topic | |
| $ git merge master | |
| $ ... work on both topic and master branches | |
| $ git checkout master | |
| $ git merge topic | |
| o---*---o---+---o---o topic | |
| / / \ | |
| o---o---o---*---o---o---o---o---+ master</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>When your topic branch is long-lived, however, your topic branch | |
| would end up having many such "Merge from master" commits on it, | |
| which would unnecessarily clutter the development history. | |
| Readers of the Linux kernel mailing list may remember that Linus | |
| complained about such too frequent test merges when a subsystem | |
| maintainer asked to pull from a branch full of "useless merges".</p></div> | |
| <div class="paragraph"><p>As an alternative, to keep the topic branch clean of test | |
| merges, you could blow away the test merge, and keep building on | |
| top of the tip before the test merge:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code> $ git checkout topic | |
| $ git merge master | |
| $ git reset --hard HEAD^ ;# rewind the test merge | |
| $ ... work on both topic and master branches | |
| $ git checkout master | |
| $ git merge topic | |
| o---*---o-------o---o topic | |
| / \ | |
| o---o---o---*---o---o---o---o---+ master</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>This would leave only one merge commit when your topic branch is | |
| finally ready and merged into the master branch. This merge | |
| would require you to resolve the conflict, introduced by the | |
| commits marked with <code>*</code>. However, this conflict is often the | |
| same conflict you resolved when you created the test merge you | |
| blew away. <em>git rerere</em> helps you resolve this final | |
| conflicted merge using the information from your earlier hand | |
| resolve.</p></div> | |
| <div class="paragraph"><p>Running the <em>git rerere</em> command immediately after a conflicted | |
| automerge records the conflicted working tree files, with the | |
| usual conflict markers <code><<<<<<<</code>, <code>=======</code>, and <code>>>>>>>></code> in | |
| them. Later, after you are done resolving the conflicts, | |
| running <em>git rerere</em> again will record the resolved state of these | |
| files. Suppose you did this when you created the test merge of | |
| master into the topic branch.</p></div> | |
| <div class="paragraph"><p>Next time, after seeing the same conflicted automerge, | |
| running <em>git rerere</em> will perform a three-way merge between the | |
| earlier conflicted automerge, the earlier manual resolution, and | |
| the current conflicted automerge. | |
| If this three-way merge resolves cleanly, the result is written | |
| out to your working tree file, so you do not have to manually | |
| resolve it. Note that <em>git rerere</em> leaves the index file alone, | |
| so you still need to do the final sanity checks with <code>git diff</code> | |
| (or <code>git diff -c</code>) and <em>git add</em> when you are satisfied.</p></div> | |
| <div class="paragraph"><p>As a convenience measure, <em>git merge</em> automatically invokes | |
| <em>git rerere</em> upon exiting with a failed automerge and <em>git rerere</em> | |
| records the hand resolve when it is a new conflict, or reuses the earlier hand | |
| resolve when it is not. <em>git commit</em> also invokes <em>git rerere</em> | |
| when committing a merge result. What this means is that you do | |
| not have to do anything special yourself (besides enabling | |
| the rerere.enabled config variable).</p></div> | |
| <div class="paragraph"><p>In our example, when you do the test merge, the manual | |
| resolution is recorded, and it will be reused when you do the | |
| actual merge later with the updated master and topic branch, as long | |
| as the recorded resolution is still applicable.</p></div> | |
| <div class="paragraph"><p>The information <em>git rerere</em> records is also used when running | |
| <em>git rebase</em>. After blowing away the test merge and continuing | |
| development on the topic branch:</p></div> | |
| <div class="listingblock"> | |
| <div class="content"> | |
| <pre><code> o---*---o-------o---o topic | |
| / | |
| o---o---o---*---o---o---o---o master | |
| $ git rebase master topic | |
| o---*---o-------o---o topic | |
| / | |
| o---o---o---*---o---o---o---o master</code></pre> | |
| </div></div> | |
| <div class="paragraph"><p>you could run <code>git rebase master topic</code>, to bring yourself | |
| up to date before your topic is ready to be sent upstream. | |
| This would result in falling back to a three-way merge, and it | |
| would conflict the same way as the test merge you resolved earlier. | |
| <em>git rerere</em> will be run by <em>git rebase</em> to help you resolve this | |
| conflict.</p></div> | |
| <div class="paragraph"><p>[NOTE] <em>git rerere</em> relies on the conflict markers in the file to | |
| detect the conflict. If the file already contains lines that look the | |
| same as lines with conflict markers, <em>git rerere</em> may fail to record a | |
| conflict resolution. To work around this, the <code>conflict-marker-size</code> | |
| setting in <a href="gitattributes.html">gitattributes(5)</a> can be used.</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(1)</a> suite</p></div> | |
| </div> | |
| </div> | |
| </div> | |
| <div id="footnotes"><hr /></div> | |
| <div id="footer"> | |
| <div id="footer-text"> | |
| Last updated | |
| 2018-09-18 07:45:24 JST | |
| </div> | |
| </div> | |
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