revlog: automatically read from opened file handles
The revlog reading code commonly opens a new file handle for
reading on demand. There is support for passing a file handle
to revlog.revision(). But it is marked as an internal argument.
When revlogs are written, we write() data as it is available. But
we don't flush() data until all revisions are written.
Putting these two traits together, it is possible for an in-process
revlog reader during active writes to trigger the opening of a new
file handle on a file with unflushed writes. The reader won't have
access to all "available" revlog data (as it hasn't been flushed).
And with the introduction of the previous patch, this can lead to
the revlog raising an error due to a partial read.
I witnessed this behavior when applying changegroup data (via
`hg pull`) before issue6006 was fixed via different means. Having
this and the previous patch in play would have helped cause errors
earlier rather than manifesting as hash verification failures.
While this has been a long-standing issue, I believe the relatively
new delta computation code has tickled it into being more common.
This is because the new delta computation code will compute deltas
in more scenarios. This can lead to revlog reading. While the delta
computation code is probably supposed to reuse file handles, it
appears it isn't doing so in all circumstances.
But the issue runs deeper than that. Theoretically, any code can
access revision data during revlog writes. It appears we were just
getting lucky that it wasn't. (The "add revision callback" passed to
addgroup() provides an avenue to do this.)
If I changed the revlog's behavior to not cache the full revision
text or to clear caches after revision insertion during addgroup(),
I was able to produce crashes 100% of the time when writing changelog
revisions. This is because changelog's add revision callback attempts
to resolve the revision data to access the changed files list. And
without the revision's fulltext being cached, we performed a revlog
read, which required opening a new file handle. This attempted to read
unflushed data, leading to a partial read and a crash.
This commit teaches the revlog to store the file handles used for
writing multiple revisions during addgroup(). It also teaches the
code for resolving a file handle when reading to use these handles,
if available. This ensures that *any* reads (regardless of their
source) use the active writing file handles, if available. These
file handles have access to the unflushed data because they wrote it.
This allows reads to complete without issue.
Differential Revision: https://phab.mercurial-scm.org/D5267
#require pygments serve
$ cat <<EOF >> $HGRCPATH
> [extensions]
> highlight =
> [web]
> pygments_style = friendly
> highlightfiles = **.py and size('<100KB')
> EOF
$ hg init test
$ cd test
$ filterhtml () {
> sed -e "s/class=\"k\"/class=\"kn\"/g" \
> -e "s/class=\"mf\"/class=\"mi\"/g" \
> -e "s/class=\"vm\"/class=\"n\"/g" \
> -e "s/class=\"\([cs]\)[h12]\"/class=\"\1\"/g"
> }
create random Python file to exercise Pygments
$ cat <<EOF > primes.py
> """Fun with generators. Corresponding Haskell implementation:
>
> primes = 2 : sieve [3, 5..]
> where sieve (p:ns) = p : sieve [n | n <- ns, mod n p /= 0]
> """
>
> import itertools
>
> def primes():
> """Generate all primes."""
> def sieve(ns):
> p = ns.next()
> # It is important to yield *here* in order to stop the
> # infinite recursion.
> yield p
> ns = itertools.ifilter(lambda n: n % p != 0, ns)
> for n in sieve(ns):
> yield n
>
> odds = itertools.ifilter(lambda i: i % 2 == 1, itertools.count())
> dropwhile = itertools.dropwhile
> return itertools.chain([2], sieve(dropwhile(lambda n: n < 3, odds)))
>
> if __name__ == "__main__":
> import sys
> try:
> n = int(sys.argv[1])
> except (ValueError, IndexError):
> n = 10
> p = primes()
> print("The first %d primes: %s" % (n, list(itertools.islice(p, n))))
> EOF
$ echo >> primes.py # to test html markup with an empty line just before EOF
$ hg ci -Ama
adding primes.py
hg serve
$ hg serve -p $HGPORT -d -n test --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
hgweb filerevision, html
$ (get-with-headers.py localhost:$HGPORT 'file/tip/primes.py') | filterhtml
200 Script output follows
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view primes.py @ 0:<a href="/rev/687f2d169546">687f2d169546</a>
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<pre class="sourcelines stripes4 wrap bottomline"
data-logurl="/log/tip/primes.py"
data-selectabletag="SPAN"
data-ishead="1">
<span id="l1"><span class="sd">"""Fun with generators. Corresponding Haskell implementation:</span></span><a href="#l1"></a>
<span id="l2"></span><a href="#l2"></a>
<span id="l3"><span class="sd">primes = 2 : sieve [3, 5..]</span></span><a href="#l3"></a>
<span id="l4"><span class="sd"> where sieve (p:ns) = p : sieve [n | n <- ns, mod n p /= 0]</span></span><a href="#l4"></a>
<span id="l5"><span class="sd">"""</span></span><a href="#l5"></a>
<span id="l6"></span><a href="#l6"></a>
<span id="l7"><span class="kn">import</span> <span class="nn">itertools</span></span><a href="#l7"></a>
<span id="l8"></span><a href="#l8"></a>
<span id="l9"><span class="kn">def</span> <span class="nf">primes</span><span class="p">():</span></span><a href="#l9"></a>
<span id="l10"> <span class="sd">"""Generate all primes."""</span></span><a href="#l10"></a>
<span id="l11"> <span class="kn">def</span> <span class="nf">sieve</span><span class="p">(</span><span class="n">ns</span><span class="p">):</span></span><a href="#l11"></a>
<span id="l12"> <span class="n">p</span> <span class="o">=</span> <span class="n">ns</span><span class="o">.</span><span class="n">next</span><span class="p">()</span></span><a href="#l12"></a>
<span id="l13"> <span class="c"># It is important to yield *here* in order to stop the</span></span><a href="#l13"></a>
<span id="l14"> <span class="c"># infinite recursion.</span></span><a href="#l14"></a>
<span id="l15"> <span class="kn">yield</span> <span class="n">p</span></span><a href="#l15"></a>
<span id="l16"> <span class="n">ns</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">ifilter</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span> <span class="o">%</span> <span class="n">p</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">ns</span><span class="p">)</span></span><a href="#l16"></a>
<span id="l17"> <span class="kn">for</span> <span class="n">n</span> <span class="ow">in</span> <span class="n">sieve</span><span class="p">(</span><span class="n">ns</span><span class="p">):</span></span><a href="#l17"></a>
<span id="l18"> <span class="kn">yield</span> <span class="n">n</span></span><a href="#l18"></a>
<span id="l19"></span><a href="#l19"></a>
<span id="l20"> <span class="n">odds</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">ifilter</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">i</span><span class="p">:</span> <span class="n">i</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">1</span><span class="p">,</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">())</span></span><a href="#l20"></a>
<span id="l21"> <span class="n">dropwhile</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">dropwhile</span></span><a href="#l21"></a>
<span id="l22"> <span class="kn">return</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">([</span><span class="mi">2</span><span class="p">],</span> <span class="n">sieve</span><span class="p">(</span><span class="n">dropwhile</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span> <span class="o"><</span> <span class="mi">3</span><span class="p">,</span> <span class="n">odds</span><span class="p">)))</span></span><a href="#l22"></a>
<span id="l23"></span><a href="#l23"></a>
<span id="l24"><span class="kn">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">"__main__"</span><span class="p">:</span></span><a href="#l24"></a>
<span id="l25"> <span class="kn">import</span> <span class="nn">sys</span></span><a href="#l25"></a>
<span id="l26"> <span class="kn">try</span><span class="p">:</span></span><a href="#l26"></a>
<span id="l27"> <span class="n">n</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></span><a href="#l27"></a>
<span id="l28"> <span class="kn">except</span> <span class="p">(</span><span class="ne">ValueError</span><span class="p">,</span> <span class="ne">IndexError</span><span class="p">):</span></span><a href="#l28"></a>
<span id="l29"> <span class="n">n</span> <span class="o">=</span> <span class="mi">10</span></span><a href="#l29"></a>
<span id="l30"> <span class="n">p</span> <span class="o">=</span> <span class="n">primes</span><span class="p">()</span></span><a href="#l30"></a>
<span id="l31"> <span class="kn">print</span><span class="p">(</span><span class="s">"The first </span><span class="si">%d</span><span class="s"> primes: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">n</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="n">itertools</span><span class="o">.</span><span class="n">islice</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">n</span><span class="p">))))</span></span><a href="#l31"></a>
<span id="l32"></span><a href="#l32"></a>
</pre>
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<td class="source followlines-btn-parent"><a href="#l1"> 1</a> <span class="sd">"""Fun with generators. Corresponding Haskell implementation:</span></td>
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<td class="source followlines-btn-parent"><a href="#l2"> 2</a> </td>
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<td class="source followlines-btn-parent"><a href="#l3"> 3</a> <span class="sd">primes = 2 : sieve [3, 5..]</span></td>
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<td class="source followlines-btn-parent"><a href="#l4"> 4</a> <span class="sd"> where sieve (p:ns) = p : sieve [n | n <- ns, mod n p /= 0]</span></td>
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<td class="source followlines-btn-parent"><a href="#l5"> 5</a> <span class="sd">"""</span></td>
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<td class="source followlines-btn-parent"><a href="#l6"> 6</a> </td>
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<td class="source followlines-btn-parent"><a href="#l7"> 7</a> <span class="kn">import</span> <span class="nn">itertools</span></td>
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<td class="source followlines-btn-parent"><a href="#l8"> 8</a> </td>
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<td class="source followlines-btn-parent"><a href="#l9"> 9</a> <span class="kn">def</span> <span class="nf">primes</span><span class="p">():</span></td>
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<td class="source followlines-btn-parent"><a href="#l10"> 10</a> <span class="sd">"""Generate all primes."""</span></td>
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<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l11"> 11</a> <span class="kn">def</span> <span class="nf">sieve</span><span class="p">(</span><span class="n">ns</span><span class="p">):</span></td>
</tr>
<tr id="l12" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l12">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l12"> 12</a> <span class="n">p</span> <span class="o">=</span> <span class="n">ns</span><span class="o">.</span><span class="n">next</span><span class="p">()</span></td>
</tr>
<tr id="l13" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l13">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l13"> 13</a> <span class="c"># It is important to yield *here* in order to stop the</span></td>
</tr>
<tr id="l14" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l14">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l14"> 14</a> <span class="c"># infinite recursion.</span></td>
</tr>
<tr id="l15" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l15">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l15"> 15</a> <span class="kn">yield</span> <span class="n">p</span></td>
</tr>
<tr id="l16" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l16">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l16"> 16</a> <span class="n">ns</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">ifilter</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span> <span class="o">%</span> <span class="n">p</span> <span class="o">!=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">ns</span><span class="p">)</span></td>
</tr>
<tr id="l17" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l17">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l17"> 17</a> <span class="kn">for</span> <span class="n">n</span> <span class="ow">in</span> <span class="n">sieve</span><span class="p">(</span><span class="n">ns</span><span class="p">):</span></td>
</tr>
<tr id="l18" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l18">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l18"> 18</a> <span class="kn">yield</span> <span class="n">n</span></td>
</tr>
<tr id="l19" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l19">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l19"> 19</a> </td>
</tr>
<tr id="l20" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l20">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l20"> 20</a> <span class="n">odds</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">ifilter</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">i</span><span class="p">:</span> <span class="n">i</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">1</span><span class="p">,</span> <span class="n">itertools</span><span class="o">.</span><span class="n">count</span><span class="p">())</span></td>
</tr>
<tr id="l21" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l21">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l21"> 21</a> <span class="n">dropwhile</span> <span class="o">=</span> <span class="n">itertools</span><span class="o">.</span><span class="n">dropwhile</span></td>
</tr>
<tr id="l22" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l22">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l22"> 22</a> <span class="kn">return</span> <span class="n">itertools</span><span class="o">.</span><span class="n">chain</span><span class="p">([</span><span class="mi">2</span><span class="p">],</span> <span class="n">sieve</span><span class="p">(</span><span class="n">dropwhile</span><span class="p">(</span><span class="kn">lambda</span> <span class="n">n</span><span class="p">:</span> <span class="n">n</span> <span class="o"><</span> <span class="mi">3</span><span class="p">,</span> <span class="n">odds</span><span class="p">)))</span></td>
</tr>
<tr id="l23" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l23">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l23"> 23</a> </td>
</tr>
<tr id="l24" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l24">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l24"> 24</a> <span class="kn">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">"__main__"</span><span class="p">:</span></td>
</tr>
<tr id="l25" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l25">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l25"> 25</a> <span class="kn">import</span> <span class="nn">sys</span></td>
</tr>
<tr id="l26" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l26">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l26"> 26</a> <span class="kn">try</span><span class="p">:</span></td>
</tr>
<tr id="l27" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l27">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l27"> 27</a> <span class="n">n</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">sys</span><span class="o">.</span><span class="n">argv</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span></td>
</tr>
<tr id="l28" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l28">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l28"> 28</a> <span class="kn">except</span> <span class="p">(</span><span class="ne">ValueError</span><span class="p">,</span> <span class="ne">IndexError</span><span class="p">):</span></td>
</tr>
<tr id="l29" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l29">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l29"> 29</a> <span class="n">n</span> <span class="o">=</span> <span class="mi">10</span></td>
</tr>
<tr id="l30" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l30">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l30"> 30</a> <span class="n">p</span> <span class="o">=</span> <span class="n">primes</span><span class="p">()</span></td>
</tr>
<tr id="l31" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l31">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l31"> 31</a> <span class="kn">print</span><span class="p">(</span><span class="s">"The first </span><span class="si">%d</span><span class="s"> primes: </span><span class="si">%s</span><span class="s">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">n</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="n">itertools</span><span class="o">.</span><span class="n">islice</span><span class="p">(</span><span class="n">p</span><span class="p">,</span> <span class="n">n</span><span class="p">))))</span></td>
</tr>
<tr id="l32" class="thisrev">
<td class="annotate parity0">
<div class="annotate-info">
<div>
<a href="/annotate/687f2d169546/primes.py#l32">
687f2d169546</a>
a
</div>
<div><em>test</em></div>
<div>parents: </div>
<a href="/diff/687f2d169546/primes.py">diff</a>
<a href="/rev/687f2d169546">changeset</a>
</div>
</td>
<td class="source followlines-btn-parent"><a href="#l32"> 32</a> </td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<script type="text/javascript" src="/static/followlines.js"></script>
</body>
</html>
hgweb fileannotate, raw
$ (get-with-headers.py localhost:$HGPORT 'annotate/tip/primes.py?style=raw') \
> | sed "s/test@//" > a
$ echo "200 Script output follows" > b
$ echo "" >> b
$ echo "" >> b
$ hg annotate "primes.py" >> b
$ echo "" >> b
$ echo "" >> b
$ echo "" >> b
$ echo "" >> b
$ cmp b a || diff -u b a
hgweb filerevision, raw
$ (get-with-headers.py localhost:$HGPORT 'file/tip/primes.py?style=raw') \
> > a
$ echo "200 Script output follows" > b
$ echo "" >> b
$ hg cat primes.py >> b
$ cmp b a || diff -u b a
hgweb highlightcss friendly
$ get-with-headers.py localhost:$HGPORT 'highlightcss' > out
$ head -n 4 out
200 Script output follows
/* pygments_style = friendly */
$ rm out
errors encountered
$ cat errors.log
$ killdaemons.py
Change the pygments style
$ cat > .hg/hgrc <<EOF
> [web]
> pygments_style = fruity
> EOF
hg serve again
$ hg serve -p $HGPORT -d -n test --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
hgweb highlightcss fruity
$ get-with-headers.py localhost:$HGPORT 'highlightcss' > out
$ head -n 4 out
200 Script output follows
/* pygments_style = fruity */
$ rm out
errors encountered
$ cat errors.log
$ killdaemons.py
only highlight C source files
$ cat > .hg/hgrc <<EOF
> [web]
> highlightfiles = **.c
> EOF
hg serve again
$ hg serve -p $HGPORT -d -n test --pid-file=hg.pid -A access.log -E errors.log
$ cat hg.pid >> $DAEMON_PIDS
test that fileset in highlightfiles works and primes.py is not highlighted
$ get-with-headers.py localhost:$HGPORT 'file/tip/primes.py' | grep 'id="l11"'
<span id="l11"> def sieve(ns):</span><a href="#l11"></a>
errors encountered
$ cat errors.log
$ cd ..
$ hg init eucjp
$ cd eucjp
$ "$PYTHON" -c 'print("\265\376")' >> eucjp.txt # Japanese kanji "Kyo"
$ hg ci -Ama
adding eucjp.txt
$ hgserveget () {
> killdaemons.py
> echo % HGENCODING="$1" hg serve
> HGENCODING="$1" hg serve -p $HGPORT -d -n test --pid-file=hg.pid -E errors.log
> cat hg.pid >> $DAEMON_PIDS
>
> echo % hgweb filerevision, html
> get-with-headers.py localhost:$HGPORT "file/tip/$2" \
> | grep '<div class="parity0 source">'
> echo % errors encountered
> cat errors.log
> }
$ hgserveget euc-jp eucjp.txt
% HGENCODING=euc-jp hg serve
% hgweb filerevision, html
% errors encountered
$ hgserveget utf-8 eucjp.txt
% HGENCODING=utf-8 hg serve
% hgweb filerevision, html
% errors encountered
$ hgserveget us-ascii eucjp.txt
% HGENCODING=us-ascii hg serve
% hgweb filerevision, html
% errors encountered
We attempt to highlight unknown files by default
$ killdaemons.py
$ cat > .hg/hgrc << EOF
> [web]
> highlightfiles = **
> EOF
$ cat > unknownfile << EOF
> #!$PYTHON
> def foo():
> pass
> EOF
$ hg add unknownfile
$ hg commit -m unknown unknownfile
$ hg serve -p $HGPORT -d -n test --pid-file=hg.pid
$ cat hg.pid >> $DAEMON_PIDS
$ get-with-headers.py localhost:$HGPORT 'file/tip/unknownfile' | grep l2
<span id="l2"><span class="k">def</span> <span class="nf">foo</span><span class="p">():</span></span><a href="#l2"></a>
We can prevent Pygments from falling back to a non filename-based
detection mode
$ cat > .hg/hgrc << EOF
> [web]
> highlightfiles = **
> highlightonlymatchfilename = true
> EOF
$ killdaemons.py
$ hg serve -p $HGPORT -d -n test --pid-file=hg.pid
$ cat hg.pid >> $DAEMON_PIDS
$ get-with-headers.py localhost:$HGPORT 'file/tip/unknownfile' | grep l2
<span id="l2">def foo():</span><a href="#l2"></a>
$ cd ..