Autogenerated HTML docs for v2.38.0-rc0-52-gdda722
diff --git a/technical/scalar.html b/technical/scalar.html new file mode 100644 index 0000000..12b4355 --- /dev/null +++ b/technical/scalar.html
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i != null; i = i.nextSibling) { + if (i.nodeType == 1 /* Node.ELEMENT_NODE */) { + var mo = re.exec(i.tagName); + if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") { + result[result.length] = new TocEntry(i, getText(i), mo[1]-1); + } + iterate(i); + } + } + } + iterate(el); + return result; + } + + var toc = document.getElementById("toc"); + 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="article"> +<div id="header"> +<h1>Scalar</h1> +</div> +<div id="content"> +<div id="preamble"> +<div class="sectionbody"> +<div class="paragraph"><p>Scalar is a repository management tool that optimizes Git for use in large +repositories. It accomplishes this by helping users to take advantage of +advanced performance features in Git. Unlike most other Git built-in commands, +Scalar is not executed as a subcommand of <em>git</em>; rather, it is built as a +separate executable containing its own series of subcommands.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_background">Background</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Scalar was originally designed as an add-on to Git and implemented as a .NET +Core application. It was created based on the learnings from the VFS for Git +project (another application aimed at improving the experience of working with +large repositories). As part of its initial implementation, Scalar relied on +custom features in the Microsoft fork of Git that have since been integrated +into core Git:</p></div> +<div class="ulist"><ul> +<li> +<p> +partial clone, +</p> +</li> +<li> +<p> +commit graphs, +</p> +</li> +<li> +<p> +multi-pack index, +</p> +</li> +<li> +<p> +sparse checkout (cone mode), +</p> +</li> +<li> +<p> +scheduled background maintenance, +</p> +</li> +<li> +<p> +etc +</p> +</li> +</ul></div> +<div class="paragraph"><p>With the requisite Git functionality in place and a desire to bring the benefits +of Scalar to the larger Git community, the Scalar application itself was ported +from C# to C and integrated upstream.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_features">Features</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Scalar is comprised of two major pieces of functionality: automatically +configuring built-in Git performance features and managing repository +enlistments.</p></div> +<div class="paragraph"><p>The Git performance features configured by Scalar (see "Background" for +examples) confer substantial performance benefits to large repositories, but are +either too experimental to enable for all of Git yet, or only benefit large +repositories. As new features are introduced, Scalar should be updated +accordingly to incorporate them. This will prevent the tool from becoming stale +while also providing a path for more easily bringing features to the appropriate +users.</p></div> +<div class="paragraph"><p>Enlistments are how Scalar knows which repositories on a user’s system should +utilize Scalar-configured features. This allows it to update performance +settings when new ones are added to the tool, as well as centrally manage +repository maintenance. The enlistment structure - a root directory with a +<code>src/</code> subdirectory containing the cloned repository itself - is designed to +encourage users to route build outputs outside of the repository to avoid the +performance-limiting overhead of ignoring those files in Git.</p></div> +</div> +</div> +<div class="sect1"> +<h2 id="_design">Design</h2> +<div class="sectionbody"> +<div class="paragraph"><p>Scalar is implemented in C and interacts with Git via a mix of child process +invocations of Git and direct usage of <code>libgit.a</code>. Internally, it is structured +much like other built-ins with subcommands (e.g., <code>git stash</code>), containing a +<code>cmd_<subcommand>()</code> function for each subcommand, routed through a <code>cmd_main()</code> +function. Most options are unique to each subcommand, with <code>scalar</code> respecting +some "global" <code>git</code> options (e.g., <code>-c</code> and <code>-C</code>).</p></div> +<div class="paragraph"><p>Because <code>scalar</code> is not invoked as a Git subcommand (like <code>git scalar</code>), it is +built and installed as its own executable in the <code>bin/</code> directory, alongside +<code>git</code>, <code>git-gui</code>, etc.</p></div> +</div> +</div> +</div> +<div id="footnotes"><hr /></div> +<div id="footer"> +<div id="footer-text"> +Last updated + 2022-09-19 15:03:44 PDT +</div> +</div> +</body> +</html> 