Generate the command-line reference from bazel help.
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Change-Id: I277f81472520b7f490cb178bb14c9618553cc4b2
Reviewed-on: https://bazel-review.googlesource.com/#/c/3880/
MOS_MIGRATED_REVID=125657323
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+---
+layout: documentation
+title: Command-Line Reference
+---
+
+<h1>Command-Line Reference</h1>
+
+<pre>
+blaze [<startup options>] <command> [<args>]
+</pre>
+
+or
+
+<pre>
+blaze [<startup options>] <command> [<args>] -- [<target patterns>]
+</pre>
+
+<h2>Option Syntax</h2>
+
+<p>
+Options can be passed to Blaze in different ways. Options that require a value
+can be passed with either an equals sign or a space:
+<pre>
+--<option>=<value>
+--<option> <value>
+</pre>
+Some options have a single character short form; in that case, the short form
+has to be passed with a single dash and a space.
+<pre>
+-<short_form> <value>
+</pre>
+</p>
+
+<p>
+Boolean options can be enabled as follows:
+<pre>
+--<option>
+--<option>=[true|yes|1]
+</pre>
+
+and disabled as follows:
+<pre>
+--no<option>
+--no_<option>
+--<option>=[false|no|0]
+</pre>
+</p>
+
+<p>
+Tristate options are usually set to automatic by default, and can be
+force-enabled as follows:
+<pre>
+--<option>=[true|yes|1]
+</pre>
+or force-disabled as follows:
+<pre>
+--no<option>
+--no_<option>
+--<option>=[false|no|0]
+</pre>
+</p>
+
+<h2>Target Pattern Syntax</h2>
+
+<p>
+A target pattern refers to a single or more targets, which are source files,
+output files, or rules specified in BUILD files. In addition to plain labels,
+Blaze also supports working-directory-relative labels, recursive patterns, and
+target subtraction.
+</p>
+
+<p>
+All target patterns starting with '//' are resolved relative to the current
+workspace.
+<table>
+<tr>
+ <td><code>//foo/bar:wiz</code></td>
+ <td>Just the single target '//foo/bar:wiz'.</td>
+</tr>
+<tr>
+ <td><code>//foo/bar</code></td>
+ <td>Equivalent to '//foo/bar:bar'.</td>
+</tr>
+<tr>
+ <td><code>//foo/bar:all</code></td>
+ <td>All rules in the package 'foo/bar'.</td>
+</tr>
+<tr>
+ <td><code>//foo/...</code></td>
+ <td>All rules in all packages beneath the directory 'foo'.</td>
+</tr>
+<tr>
+ <td><code>//foo/...:all</code></td>
+ <td>All rules in all packages beneath the directory 'foo'.</td>
+</tr>
+<tr>
+ <td><code>//foo/...:*</code></td>
+ <td>All targets (rules and files) in all packages beneath the directory 'foo'.</td>
+</tr>
+<tr>
+ <td><code>//foo/...:all-targets</code></td>
+ <td>All targets (rules and files) in all packages beneath the directory 'foo'.</td>
+</tr>
+</table>
+</p>
+
+<p>
+Targets with <code>tags=["manual"]</code> are not included in wildcard
+target patterns (<code>...</code>, <code>:*</code>, <code>:all</code>, etc).
+Specify such test targets with explicit labels on the command line if
+you want Blaze to build/test them.
+</p>
+
+<p>
+Target patterns which do not begin with '//' are resolved relative to the
+current <em>working directory</em>. These examples assume a working directory of
+'foo':
+<table>
+<tr>
+ <td><code>:foo</code></td>
+ <td>Equivalent to '//foo:foo'.</td>
+</tr>
+<tr>
+ <td><code>bar:wiz</code></td>
+ <td>Equivalent to '//foo/bar:wiz'.</td>
+</tr>
+<tr>
+ <td><code>bar/wiz</code></td>
+ <td>Equivalent to:
+ '//foo/bar/wiz:wiz' if foo/bar/wiz is a package,
+ '//foo/bar:wiz' if foo/bar is a package,
+ '//foo:bar/wiz' otherwise.
+ </td>
+</tr>
+<tr>
+ <td><code>bar:all</code></td>
+ <td>Equivalent to '//foo/bar:all'.</td>
+</tr>
+<tr>
+ <td><code>:all</code></td>
+ <td>Equivalent to '//foo:all'.</td>
+</tr>
+<tr>
+ <td><code>...:all</code></td>
+ <td>Equivalent to '//foo/...:all'.</td>
+</tr>
+<tr>
+ <td><code>...</code></td>
+ <td>Equivalent to '//foo/...:all'.</td>
+</tr>
+<tr>
+ <td><code>bar/...:all</code></td>
+ <td>Equivalent to '//foo/bar/...:all'.</td>
+</tr>
+</table>
+</p>
+
+<p>
+By default, directory symlinks are followed for recursive target patterns,
+except those that point to under the output base, such as the convenience
+symlinks that are created in the root directory of the workspace.
+</p>
+
+<p>
+In addition, Blaze does not follow symlinks when evaluating recursive target
+patterns in any directory that contains a file named as follows:
+<pre>
+DONT_FOLLOW_SYMLINKS_WHEN_TRAVERSING_THIS_DIRECTORY_VIA_A_RECURSIVE_TARGET_PATTERN
+</pre>
+</p>
+
+<p>
+Target patterns may be preceded by a single dash ('<code>-</code>'), in which
+case Blaze subtracts them from the set of targets accumulated by preceding
+patterns. Note that this means <em>order matters</em>. In order to pass negative
+target patterns, you need to use '--' as an argument to prevent Blaze from
+interpreting it as an option, e.g.:
+<pre>
+blaze build -- foo/... -foo/contrib/...
+</pre>
+Note that Blaze may still build targets matched by a negative target pattern due
+to dependencies, and may also load the corresponding BUILD files, even if the
+targets are never built.
+</p>
+
+
+
