fileset: use decorator to mark a function as fileset predicate
Using decorator can localize changes for adding (or removing) a
fileset predicate function in source code.
It is also useful to pick predicates up for specific purpose. For
example, subsequent patches marks predicates as "call status" or "use
existing" via decorator.
To avoid (1) redundancy between "predicate name" and (the beginning
of) help document, and (2) accidental typo of help document, this
patch also makes decorator put predicate declration into the beginning
of help.
#require pygments serve
$ cat <<EOF >> $HGRCPATH
> [extensions]
> highlight =
> [web]
> pygments_style = friendly
> highlightfiles = **.py and size('<100KB')
> EOF
$ hg init test
$ cd test
create random Python file to exercise Pygments
$ cat <<EOF > primes.py
> #!/usr/bin/env python
>
> """Fun with generators. Corresponding Haskell implementation:
>
> primes = 2 : sieve [3, 5..]
> where sieve (p:ns) = p : sieve [n | n <- ns, mod n p /= 0]
> """
>
> from itertools import dropwhile, ifilter, islice, count, chain
>
> 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 = ifilter(lambda n: n % p != 0, ns)
> for n in sieve(ns):
> yield n
>
> odds = ifilter(lambda i: i % 2 == 1, count())
> return 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(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') \
> | sed "s/class=\"k\"/class=\"kn\"/g" | sed "s/class=\"mf\"/class=\"mi\"/g"
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<span id="l1"><span class="c">#!/usr/bin/env python</span></span><a href="#l1"></a>
<span id="l2"></span><a href="#l2"></a>
<span id="l3"><span class="sd">"""Fun with generators. Corresponding Haskell implementation:</span></span><a href="#l3"></a>
<span id="l4"></span><a href="#l4"></a>
<span id="l5"><span class="sd">primes = 2 : sieve [3, 5..]</span></span><a href="#l5"></a>
<span id="l6"><span class="sd"> where sieve (p:ns) = p : sieve [n | n <- ns, mod n p /= 0]</span></span><a href="#l6"></a>
<span id="l7"><span class="sd">"""</span></span><a href="#l7"></a>
<span id="l8"></span><a href="#l8"></a>
<span id="l9"><span class="kn">from</span> <span class="nn">itertools</span> <span class="kn">import</span> <span class="n">dropwhile</span><span class="p">,</span> <span class="n">ifilter</span><span class="p">,</span> <span class="n">islice</span><span class="p">,</span> <span class="n">count</span><span class="p">,</span> <span class="n">chain</span></span><a href="#l9"></a>
<span id="l10"></span><a href="#l10"></a>
<span id="l11"><span class="kn">def</span> <span class="nf">primes</span><span class="p">():</span></span><a href="#l11"></a>
<span id="l12"> <span class="sd">"""Generate all primes."""</span></span><a href="#l12"></a>
<span id="l13"> <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="#l13"></a>
<span id="l14"> <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="#l14"></a>
<span id="l15"> <span class="c"># It is important to yield *here* in order to stop the</span></span><a href="#l15"></a>
<span id="l16"> <span class="c"># infinite recursion.</span></span><a href="#l16"></a>
<span id="l17"> <span class="kn">yield</span> <span class="n">p</span></span><a href="#l17"></a>
<span id="l18"> <span class="n">ns</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="#l18"></a>
<span id="l19"> <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="#l19"></a>
<span id="l20"> <span class="kn">yield</span> <span class="n">n</span></span><a href="#l20"></a>
<span id="l21"></span><a href="#l21"></a>
<span id="l22"> <span class="n">odds</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">count</span><span class="p">())</span></span><a href="#l22"></a>
<span id="l23"> <span class="kn">return</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="#l23"></a>
<span id="l24"></span><a href="#l24"></a>
<span id="l25"><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="#l25"></a>
<span id="l26"> <span class="kn">import</span> <span class="nn">sys</span></span><a href="#l26"></a>
<span id="l27"> <span class="kn">try</span><span class="p">:</span></span><a href="#l27"></a>
<span id="l28"> <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="#l28"></a>
<span id="l29"> <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="#l29"></a>
<span id="l30"> <span class="n">n</span> <span class="o">=</span> <span class="mi">10</span></span><a href="#l30"></a>
<span id="l31"> <span class="n">p</span> <span class="o">=</span> <span class="n">primes</span><span class="p">()</span></span><a href="#l31"></a>
<span id="l32"> <span class="kn">print</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">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="#l32"></a>
<span id="l33"></span><a href="#l33"></a></pre>
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<tr id="l1">
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<a href="/annotate/06824edf55d0/primes.py#l1"
title="06824edf55d0: a">test@0</a>
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<td class="source"><a href="#l1"> 1</a> <span class="c">#!/usr/bin/env python</span></td>
</tr>
<tr id="l2">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l2"
title="06824edf55d0: a">test@0</a>
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<td class="source"><a href="#l2"> 2</a> </td>
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<a href="/annotate/06824edf55d0/primes.py#l3"
title="06824edf55d0: a">test@0</a>
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<td class="source"><a href="#l3"> 3</a> <span class="sd">"""Fun with generators. Corresponding Haskell implementation:</span></td>
</tr>
<tr id="l4">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l4"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l4"> 4</a> </td>
</tr>
<tr id="l5">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l5"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l5"> 5</a> <span class="sd">primes = 2 : sieve [3, 5..]</span></td>
</tr>
<tr id="l6">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l6"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l6"> 6</a> <span class="sd"> where sieve (p:ns) = p : sieve [n | n <- ns, mod n p /= 0]</span></td>
</tr>
<tr id="l7">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l7"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l7"> 7</a> <span class="sd">"""</span></td>
</tr>
<tr id="l8">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l8"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l8"> 8</a> </td>
</tr>
<tr id="l9">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l9"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l9"> 9</a> <span class="kn">from</span> <span class="nn">itertools</span> <span class="kn">import</span> <span class="n">dropwhile</span><span class="p">,</span> <span class="n">ifilter</span><span class="p">,</span> <span class="n">islice</span><span class="p">,</span> <span class="n">count</span><span class="p">,</span> <span class="n">chain</span></td>
</tr>
<tr id="l10">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l10"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l10"> 10</a> </td>
</tr>
<tr id="l11">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l11"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l11"> 11</a> <span class="kn">def</span> <span class="nf">primes</span><span class="p">():</span></td>
</tr>
<tr id="l12">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l12"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l12"> 12</a> <span class="sd">"""Generate all primes."""</span></td>
</tr>
<tr id="l13">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l13"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l13"> 13</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="l14">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l14"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l14"> 14</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="l15">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l15"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l15"> 15</a> <span class="c"># It is important to yield *here* in order to stop the</span></td>
</tr>
<tr id="l16">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l16"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l16"> 16</a> <span class="c"># infinite recursion.</span></td>
</tr>
<tr id="l17">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l17"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l17"> 17</a> <span class="kn">yield</span> <span class="n">p</span></td>
</tr>
<tr id="l18">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l18"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l18"> 18</a> <span class="n">ns</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="mf">0</span><span class="p">,</span> <span class="n">ns</span><span class="p">)</span></td>
</tr>
<tr id="l19">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l19"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l19"> 19</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="l20">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l20"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l20"> 20</a> <span class="kn">yield</span> <span class="n">n</span></td>
</tr>
<tr id="l21">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l21"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l21"> 21</a> </td>
</tr>
<tr id="l22">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l22"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l22"> 22</a> <span class="n">odds</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="mf">2</span> <span class="o">==</span> <span class="mf">1</span><span class="p">,</span> <span class="n">count</span><span class="p">())</span></td>
</tr>
<tr id="l23">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l23"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l23"> 23</a> <span class="kn">return</span> <span class="n">chain</span><span class="p">([</span><span class="mf">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="mf">3</span><span class="p">,</span> <span class="n">odds</span><span class="p">)))</span></td>
</tr>
<tr id="l24">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l24"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l24"> 24</a> </td>
</tr>
<tr id="l25">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l25"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l25"> 25</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="l26">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l26"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l26"> 26</a> <span class="kn">import</span> <span class="nn">sys</span></td>
</tr>
<tr id="l27">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l27"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l27"> 27</a> <span class="kn">try</span><span class="p">:</span></td>
</tr>
<tr id="l28">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l28"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l28"> 28</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="mf">1</span><span class="p">])</span></td>
</tr>
<tr id="l29">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l29"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l29"> 29</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="l30">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l30"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l30"> 30</a> <span class="n">n</span> <span class="o">=</span> <span class="mf">10</span></td>
</tr>
<tr id="l31">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l31"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l31"> 31</a> <span class="n">p</span> <span class="o">=</span> <span class="n">primes</span><span class="p">()</span></td>
</tr>
<tr id="l32">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l32"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l32"> 32</a> <span class="kn">print</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">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="l33">
<td class="annotate">
<a href="/annotate/06824edf55d0/primes.py#l33"
title="06824edf55d0: a">test@0</a>
</td>
<td class="source"><a href="#l33"> 33</a> </td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<script type="text/javascript">process_dates()</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 primes():</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
> #!/usr/bin/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 ..