gitformat-bundle.html

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   5 <head>
   6 <meta http-equiv="Content-Type" content="application/xhtml+xml; charset=UTF-8" />
   7 <meta name="generator" content="AsciiDoc 10.2.0" />
   8 <title>gitformat-bundle(5)</title>
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  18 h1, h2, h3, h4, h5, h6,
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  80 p {
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 342
 343 @media print {
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 347 #toc {
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 419
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 421  * xhtml11 specific
 422  *
 423  * */
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 451
 452
 453 /*
 454  * html5 specific
 455  *
 456  * */
 457
 458 table.tableblock {
 459   margin-top: 1.0em;
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 461 }
 462 thead, p.tableblock.header {
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 515
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 518  *
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 533
 534 @media print {
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 537
 538
 539 </style>
 540 <script type="text/javascript">
 541 /*<![CDATA[*/
 542 var asciidoc = {  // Namespace.
 543
 544 /////////////////////////////////////////////////////////////////////
 545 // Table Of Contents generator
 546 /////////////////////////////////////////////////////////////////////
 547
 548 /* Author: Mihai Bazon, September 2002
 549  * http://students.infoiasi.ro/~mishoo
 550  *
 551  * Table Of Content generator
 552  * Version: 0.4
 553  *
 554  * Feel free to use this script under the terms of the GNU General Public
 555  * License, as long as you do not remove or alter this notice.
 556  */
 557
 558  /* modified by Troy D. Hanson, September 2006. License: GPL */
 559  /* modified by Stuart Rackham, 2006, 2009. License: GPL */
 560
 561 // toclevels = 1..4.
 562 toc: function (toclevels) {
 563
 564   function getText(el) {
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 566     for (var i = el.firstChild; i != null; i = i.nextSibling) {
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 571     }
 572     return text;
 573   }
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 583     var re = new RegExp('[hH]([1-'+(toclevels+1)+'])');
 584     // Function that scans the DOM tree for header elements (the DOM2
 585     // nodeIterator API would be a better technique but not supported by all
 586     // browsers).
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 592             result[result.length] = new TocEntry(i, getText(i), mo[1]-1);
 593           }
 594           iterate(i);
 595         }
 596       }
 597     }
 598     iterate(el);
 599     return result;
 600   }
 601
 602   var toc = document.getElementById("toc");
 603   if (!toc) {
 604     return;
 605   }
 606
 607   // Delete existing TOC entries in case we're reloading the TOC.
 608   var tocEntriesToRemove = [];
 609   var i;
 610   for (i = 0; i < toc.childNodes.length; i++) {
 611     var entry = toc.childNodes[i];
 612     if (entry.nodeName.toLowerCase() == 'div'
 613      && entry.getAttribute("class")
 614      && entry.getAttribute("class").match(/^toclevel/))
 615       tocEntriesToRemove.push(entry);
 616   }
 617   for (i = 0; i < tocEntriesToRemove.length; i++) {
 618     toc.removeChild(tocEntriesToRemove[i]);
 619   }
 620
 621   // Rebuild TOC entries.
 622   var entries = tocEntries(document.getElementById("content"), toclevels);
 623   for (var i = 0; i < entries.length; ++i) {
 624     var entry = entries[i];
 625     if (entry.element.id == "")
 626       entry.element.id = "_toc_" + i;
 627     var a = document.createElement("a");
 628     a.href = "#" + entry.element.id;
 629     a.appendChild(document.createTextNode(entry.text));
 630     var div = document.createElement("div");
 631     div.appendChild(a);
 632     div.className = "toclevel" + entry.toclevel;
 633     toc.appendChild(div);
 634   }
 635   if (entries.length == 0)
 636     toc.parentNode.removeChild(toc);
 637 },
 638
 639
 640 /////////////////////////////////////////////////////////////////////
 641 // Footnotes generator
 642 /////////////////////////////////////////////////////////////////////
 643
 644 /* Based on footnote generation code from:
 645  * http://www.brandspankingnew.net/archive/2005/07/format_footnote.html
 646  */
 647
 648 footnotes: function () {
 649   // Delete existing footnote entries in case we're reloading the footnodes.
 650   var i;
 651   var noteholder = document.getElementById("footnotes");
 652   if (!noteholder) {
 653     return;
 654   }
 655   var entriesToRemove = [];
 656   for (i = 0; i < noteholder.childNodes.length; i++) {
 657     var entry = noteholder.childNodes[i];
 658     if (entry.nodeName.toLowerCase() == 'div' && entry.getAttribute("class") == "footnote")
 659       entriesToRemove.push(entry);
 660   }
 661   for (i = 0; i < entriesToRemove.length; i++) {
 662     noteholder.removeChild(entriesToRemove[i]);
 663   }
 664
 665   // Rebuild footnote entries.
 666   var cont = document.getElementById("content");
 667   var spans = cont.getElementsByTagName("span");
 668   var refs = {};
 669   var n = 0;
 670   for (i=0; i<spans.length; i++) {
 671     if (spans[i].className == "footnote") {
 672       n++;
 673       var note = spans[i].getAttribute("data-note");
 674       if (!note) {
 675         // Use [\s\S] in place of . so multi-line matches work.
 676         // Because JavaScript has no s (dotall) regex flag.
 677         note = spans[i].innerHTML.match(/\s*\[([\s\S]*)]\s*/)[1];
 678         spans[i].innerHTML =
 679           "[<a id='_footnoteref_" + n + "' href='#_footnote_" + n +
 680           "' title='View footnote' class='footnote'>" + n + "</a>]";
 681         spans[i].setAttribute("data-note", note);
 682       }
 683       noteholder.innerHTML +=
 684         "<div class='footnote' id='_footnote_" + n + "'>" +
 685         "<a href='#_footnoteref_" + n + "' title='Return to text'>" +
 686         n + "</a>. " + note + "</div>";
 687       var id =spans[i].getAttribute("id");
 688       if (id != null) refs["#"+id] = n;
 689     }
 690   }
 691   if (n == 0)
 692     noteholder.parentNode.removeChild(noteholder);
 693   else {
 694     // Process footnoterefs.
 695     for (i=0; i<spans.length; i++) {
 696       if (spans[i].className == "footnoteref") {
 697         var href = spans[i].getElementsByTagName("a")[0].getAttribute("href");
 698         href = href.match(/#.*/)[0];  // Because IE return full URL.
 699         n = refs[href];
 700         spans[i].innerHTML =
 701           "[<a href='#_footnote_" + n +
 702           "' title='View footnote' class='footnote'>" + n + "</a>]";
 703       }
 704     }
 705   }
 706 },
 707
 708 install: function(toclevels) {
 709   var timerId;
 710
 711   function reinstall() {
 712     asciidoc.footnotes();
 713     if (toclevels) {
 714       asciidoc.toc(toclevels);
 715     }
 716   }
 717
 718   function reinstallAndRemoveTimer() {
 719     clearInterval(timerId);
 720     reinstall();
 721   }
 722
 723   timerId = setInterval(reinstall, 500);
 724   if (document.addEventListener)
 725     document.addEventListener("DOMContentLoaded", reinstallAndRemoveTimer, false);
 726   else
 727     window.onload = reinstallAndRemoveTimer;
 728 }
 729
 730 }
 731 asciidoc.install();
 732 /*]]>*/
 733 </script>
 734 </head>
 735 <body class="manpage">
 736 <div id="header">
 737 <h1>
 738 gitformat-bundle(5) Manual Page
 739 </h1>
 740 <h2>NAME</h2>
 741 <div class="sectionbody">
 742 <p>gitformat-bundle -
 743    The bundle file format
 744 </p>
 745 </div>
 746 </div>
 747 <div id="content">
 748 <div class="sect1">
 749 <h2 id="_synopsis">SYNOPSIS</h2>
 750 <div class="sectionbody">
 751 <div class="verseblock">
 752 <pre class="content">*.bundle
 753 *.bdl</pre>
 754 <div class="attribution">
 755 </div></div>
 756 </div>
 757 </div>
 758 <div class="sect1">
 759 <h2 id="_description">DESCRIPTION</h2>
 760 <div class="sectionbody">
 761 <div class="paragraph"><p>The Git bundle format is a format that represents both refs and Git
 762 objects. A bundle is a header in a format similar to
 763 <a href="git-show-ref.html">git-show-ref(1)</a> followed by a pack in *.pack format.</p></div>
 764 <div class="paragraph"><p>The format is created and read by the <a href="git-bundle.html">git-bundle(1)</a> command,
 765 and supported by e.g. <a href="git-fetch.html">git-fetch(1)</a> and <a href="git-clone.html">git-clone(1)</a>.</p></div>
 766 </div>
 767 </div>
 768 <div class="sect1">
 769 <h2 id="_format">FORMAT</h2>
 770 <div class="sectionbody">
 771 <div class="paragraph"><p>We will use ABNF notation to define the Git bundle format. See
 772 <a href="gitprotocol-common.html">gitprotocol-common(5)</a> for the details.</p></div>
 773 <div class="paragraph"><p>A v2 bundle looks like this:</p></div>
 774 <div class="listingblock">
 775 <div class="content">
 776 <pre><code>bundle    = signature *prerequisite *reference LF pack
 777 signature = "# v2 git bundle" LF
 778
 779 prerequisite = "-" obj-id SP comment LF
 780 comment      = *CHAR
 781 reference    = obj-id SP refname LF
 782
 783 pack         = ... ; packfile</code></pre>
 784 </div></div>
 785 <div class="paragraph"><p>A v3 bundle looks like this:</p></div>
 786 <div class="listingblock">
 787 <div class="content">
 788 <pre><code>bundle    = signature *capability *prerequisite *reference LF pack
 789 signature = "# v3 git bundle" LF
 790
 791 capability   = "@" key ["=" value] LF
 792 prerequisite = "-" obj-id SP comment LF
 793 comment      = *CHAR
 794 reference    = obj-id SP refname LF
 795 key          = 1*(ALPHA / DIGIT / "-")
 796 value        = *(%01-09 / %0b-FF)
 797
 798 pack         = ... ; packfile</code></pre>
 799 </div></div>
 800 </div>
 801 </div>
 802 <div class="sect1">
 803 <h2 id="_semantics">SEMANTICS</h2>
 804 <div class="sectionbody">
 805 <div class="paragraph"><p>A Git bundle consists of several parts.</p></div>
 806 <div class="ulist"><ul>
 807 <li>
 808 <p>
 809 "Capabilities", which are only in the v3 format, indicate functionality that
 810         the bundle requires to be read properly.
 811 </p>
 812 </li>
 813 <li>
 814 <p>
 815 "Prerequisites" list the objects that are NOT included in the bundle and the
 816   reader of the bundle MUST already have, in order to use the data in the
 817   bundle. The objects stored in the bundle may refer to prerequisite objects and
 818   anything reachable from them (e.g. a tree object in the bundle can reference
 819   a blob that is reachable from a prerequisite) and/or expressed as a delta
 820   against prerequisite objects.
 821 </p>
 822 </li>
 823 <li>
 824 <p>
 825 "References" record the tips of the history graph, iow, what the reader of the
 826   bundle CAN "git fetch" from it.
 827 </p>
 828 </li>
 829 <li>
 830 <p>
 831 "Pack" is the pack data stream "git fetch" would send, if you fetch from a
 832   repository that has the references recorded in the "References" above into a
 833   repository that has references pointing at the objects listed in
 834   "Prerequisites" above.
 835 </p>
 836 </li>
 837 </ul></div>
 838 <div class="paragraph"><p>In the bundle format, there can be a comment following a prerequisite obj-id.
 839 This is a comment and it has no specific meaning. The writer of the bundle MAY
 840 put any string here. The reader of the bundle MUST ignore the comment.</p></div>
 841 <div class="sect2">
 842 <h3 id="_note_on_shallow_clones_and_git_bundles">Note on shallow clones and Git bundles</h3>
 843 <div class="paragraph"><p>Note that the prerequisites do not represent a shallow-clone boundary. The
 844 semantics of the prerequisites and the shallow-clone boundaries are different,
 845 and the Git bundle v2 format cannot represent a shallow clone repository.</p></div>
 846 </div>
 847 </div>
 848 </div>
 849 <div class="sect1">
 850 <h2 id="_capabilities">CAPABILITIES</h2>
 851 <div class="sectionbody">
 852 <div class="paragraph"><p>Because there is no opportunity for negotiation, unknown capabilities cause <em>git
 853 bundle</em> to abort.</p></div>
 854 <div class="ulist"><ul>
 855 <li>
 856 <p>
 857 <code>object-format</code> specifies the hash algorithm in use, and can take the same
 858   values as the <code>extensions.objectFormat</code> configuration value.
 859 </p>
 860 </li>
 861 <li>
 862 <p>
 863 <code>filter</code> specifies an object filter as in the <code>--filter</code> option in
 864   <a href="git-rev-list.html">git-rev-list(1)</a>. The resulting pack-file must be marked as a
 865   <code>.promisor</code> pack-file after it is unbundled.
 866 </p>
 867 </li>
 868 </ul></div>
 869 </div>
 870 </div>
 871 <div class="sect1">
 872 <h2 id="_git">GIT</h2>
 873 <div class="sectionbody">
 874 <div class="paragraph"><p>Part of the <a href="git.html">git(1)</a> suite</p></div>
 875 </div>
 876 </div>
 877 </div>
 878 <div id="footnotes"><hr /></div>
 879 <div id="footer">
 880 <div id="footer-text">
 881 Last updated
 882  2023-10-23 14:43:46 PDT
 883 </div>
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