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view tests/test-highlight.t @ 40326:fed697fa1734
sqlitestore: file storage backend using SQLite
This commit provides an extension which uses SQLite to store file
data (as opposed to revlogs).
As the inline documentation describes, there are still several
aspects to the extension that are incomplete. But it's a start.
The extension does support basic clone, checkout, and commit
workflows, which makes it suitable for simple use cases.
One notable missing feature is support for "bundlerepos." This is
probably responsible for the most test failures when the extension
is activated as part of the test suite.
All revision data is stored in SQLite. Data is stored as zstd
compressed chunks (default if zstd is available), zlib compressed
chunks (default if zstd is not available), or raw chunks (if
configured or if a compressed delta is not smaller than the raw
delta). This makes things very similar to revlogs.
Unlike revlogs, the extension doesn't yet enforce a limit on delta
chain length. This is an obvious limitation and should be addressed.
This is somewhat mitigated by the use of zstd, which is much faster
than zlib to decompress.
There is a dedicated table for storing deltas. Deltas are stored
by the SHA-1 hash of their uncompressed content. The "fileindex" table
has columns that reference the delta for each revision and the base
delta that delta should be applied against. A recursive SQL query
is used to resolve the delta chain along with the delta data.
By storing deltas by hash, we are able to de-duplicate delta storage!
With revlogs, the same deltas in different revlogs would result in
duplicate storage of that delta. In this scheme, inserting the
duplicate delta is a no-op and delta chains simply reference the
existing delta.
When initially implementing this extension, I did not have
content-indexed deltas and deltas could be duplicated across files
(just like revlogs). When I implemented content-indexed deltas, the
size of the SQLite database for a full clone of mozilla-unified
dropped:
before: 2,554,261,504 bytes
after: 2,488,754,176 bytes
Surprisingly, this is still larger than the bytes size of revlog
files:
revlog files: 2,104,861,230 bytes
du -b: 2,254,381,614
I would have expected storage to be smaller since we're not limiting
delta chain length and since we're using zstd instead of zlib. I
suspect the SQLite indexes and per-column overhead account for the
bulk of the differences. (Keep in mind that revlog uses a 64-byte
packed struct for revision index data and deltas are stored without
padding. Aside from the 12 unused bytes in the 32 byte node field,
revlogs are pretty efficient.) Another source of overhead is file
name storage. With revlogs, file names are stored in the filesystem.
But with SQLite, we need to store file names in the database. This is
roughly equivalent to the size of the fncache file, which for the
mozilla-unified repository is ~34MB.
Since the SQLite database isn't append-only and since delta chains
can reference any delta, this opens some interesting possibilities.
For example, we could store deltas in reverse, such that fulltexts
are stored for newer revisions and deltas are applied to reconstruct
older revisions. This is likely a more optimal storage strategy for
version control, as new data tends to be more frequently accessed
than old data. We would obviously need wire protocol support for
transferring revision data from newest to oldest. And we would
probably need some kind of mechanism for "re-encoding" stores. But
it should be doable.
This extension is very much experimental quality. There are a handful
of features that don't work. It probably isn't suitable for day-to-day
use. But it could be used in limited cases (e.g. read-only checkouts
like in CI). And it is also a good proving ground for alternate
storage backends. As we continue to define interfaces for all things
storage, it will be useful to have a viable alternate storage backend
to see how things shake out in practice.
test-storage.py passes on Python 2 and introduces no new test failures on
Python 3. Having the storage-level unit tests has proved to be insanely
useful when developing this extension. Those tests caught numerous bugs
during development and I'm convinced this style of testing is the way
forward for ensuring alternate storage backends work as intended. Of
course, test coverage isn't close to what it needs to be. But it is
a start. And what coverage we have gives me confidence that basic store
functionality is implemented properly.
Differential Revision: https://phab.mercurial-scm.org/D4928
| author | Gregory Szorc <gregory.szorc@gmail.com> |
|---|---|
| date | Tue, 09 Oct 2018 08:50:13 -0700 |
| parents | 5abc47d4ca6b |
| children | 3b84ef904aea |
line wrap: on
line source
#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] > """ > > 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') | filterhtml 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US"> <head> <link rel="icon" href="/static/hgicon.png" type="image/png" /> <meta name="robots" content="index, nofollow" /> <link rel="stylesheet" href="/static/style-paper.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <link rel="stylesheet" href="/highlightcss" type="text/css" /> <title>test: f4fca47b67e6 primes.py</title> </head> <body> <div class="container"> <div class="menu"> <div class="logo"> <a href="https://mercurial-scm.org/"> <img src="/static/hglogo.png" alt="mercurial" /></a> </div> <ul> <li><a href="/shortlog/tip">log</a></li> <li><a href="/graph/tip">graph</a></li> <li><a href="/tags">tags</a></li> <li><a href="/bookmarks">bookmarks</a></li> <li><a href="/branches">branches</a></li> </ul> <ul> <li><a href="/rev/tip">changeset</a></li> <li><a href="/file/tip/">browse</a></li> </ul> <ul> <li class="active">file</li> <li><a href="/file/tip/primes.py">latest</a></li> <li><a href="/diff/tip/primes.py">diff</a></li> <li><a href="/comparison/tip/primes.py">comparison</a></li> <li><a href="/annotate/tip/primes.py">annotate</a></li> <li><a href="/log/tip/primes.py">file log</a></li> <li><a href="/raw-file/tip/primes.py">raw</a></li> </ul> <ul> <li><a href="/help">help</a></li> </ul> </div> <div class="main"> <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2> <h3> view primes.py @ 0:<a href="/rev/f4fca47b67e6">f4fca47b67e6</a> <span class="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> </h3> <form class="search" action="/log"> <p><input name="rev" id="search1" type="text" size="30" value="" /></p> <div id="hint">Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="/help/revsets">revset expression</a>.</div> </form> <div class="description">a</div> <table id="changesetEntry"> <tr> <th class="author">author</th> <td class="author">test</td> </tr> <tr> <th class="date">date</th> <td class="date age">Thu, 01 Jan 1970 00:00:00 +0000</td> </tr> <tr> <th class="author">parents</th> <td class="author"></td> </tr> <tr> <th class="author">children</th> <td class="author"></td> </tr> </table> <div class="overflow"> <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div> <div class="sourcefirst"> line source</div> <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">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="#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">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">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="#l20"></a> <span id="l21"> <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="#l21"></a> <span id="l22"></span><a href="#l22"></a> <span id="l23"><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="#l23"></a> <span id="l24"> <span class="kn">import</span> <span class="nn">sys</span></span><a href="#l24"></a> <span id="l25"> <span class="kn">try</span><span class="p">:</span></span><a href="#l25"></a> <span id="l26"> <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="#l26"></a> <span id="l27"> <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="#l27"></a> <span id="l28"> <span class="n">n</span> <span class="o">=</span> <span class="mi">10</span></span><a href="#l28"></a> <span id="l29"> <span class="n">p</span> <span class="o">=</span> <span class="n">primes</span><span class="p">()</span></span><a href="#l29"></a> <span id="l30"> <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">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="#l30"></a> <span id="l31"></span><a href="#l31"></a> </pre> </div> <script type="text/javascript" src="/static/followlines.js"></script> </div> </div> </body> </html> hgweb fileannotate, html $ (get-with-headers.py localhost:$HGPORT 'annotate/tip/primes.py') | filterhtml 200 Script output follows <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US"> <head> <link rel="icon" href="/static/hgicon.png" type="image/png" /> <meta name="robots" content="index, nofollow" /> <link rel="stylesheet" href="/static/style-paper.css" type="text/css" /> <script type="text/javascript" src="/static/mercurial.js"></script> <link rel="stylesheet" href="/highlightcss" type="text/css" /> <title>test: primes.py annotate</title> </head> <body> <div class="container"> <div class="menu"> <div class="logo"> <a href="https://mercurial-scm.org/"> <img src="/static/hglogo.png" alt="mercurial" /></a> </div> <ul> <li><a href="/shortlog/tip">log</a></li> <li><a href="/graph/tip">graph</a></li> <li><a href="/tags">tags</a></li> <li><a href="/bookmarks">bookmarks</a></li> <li><a href="/branches">branches</a></li> </ul> <ul> <li><a href="/rev/tip">changeset</a></li> <li><a href="/file/tip/">browse</a></li> </ul> <ul> <li><a href="/file/tip/primes.py">file</a></li> <li><a href="/file/tip/primes.py">latest</a></li> <li><a href="/diff/tip/primes.py">diff</a></li> <li><a href="/comparison/tip/primes.py">comparison</a></li> <li class="active">annotate</li> <li><a href="/log/tip/primes.py">file log</a></li> <li><a href="/raw-file/tip/primes.py">raw</a></li> </ul> <ul> <li><a href="/help">help</a></li> </ul> </div> <div class="main"> <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2> <h3> annotate primes.py @ 0:<a href="/rev/f4fca47b67e6">f4fca47b67e6</a> <span class="phase">draft</span> <span class="branchhead">default</span> <span class="tag">tip</span> </h3> <form class="search" action="/log"> <p><input name="rev" id="search1" type="text" size="30" value="" /></p> <div id="hint">Find changesets by keywords (author, files, the commit message), revision number or hash, or <a href="/help/revsets">revset expression</a>.</div> </form> <div class="description">a</div> <table id="changesetEntry"> <tr> <th class="author">author</th> <td class="author">test</td> </tr> <tr> <th class="date">date</th> <td class="date age">Thu, 01 Jan 1970 00:00:00 +0000</td> </tr> <tr> <th class="author">parents</th> <td class="author"></td> </tr> <tr> <th class="author">children</th> <td class="author"></td> </tr> </table> <form id="diffopts-form" data-ignorews="0" data-ignorewsamount="0" data-ignorewseol="0" data-ignoreblanklines="0"> <span>Ignore whitespace changes - </span> <span>Everywhere:</span> <input id="ignorews-checkbox" type="checkbox" /> <span>Within whitespace:</span> <input id="ignorewsamount-checkbox" type="checkbox" /> <span>At end of lines:</span> <input id="ignorewseol-checkbox" type="checkbox" /> </form> <script type="text/javascript"> renderDiffOptsForm(); </script> <div class="overflow"> <table class="bigtable"> <thead> <tr> <th class="annotate">rev</th> <th class="line"> line source</th> </tr> </thead> <tbody class="stripes2 sourcelines" data-logurl="/log/tip/primes.py" data-selectabletag="TR" data-ishead="1"> <tr id="l1" class="thisrev"> <td class="annotate parity0"> <a href="/annotate/f4fca47b67e6/primes.py#l1"> 0 </a> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l1"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l1"> 1</a> <span class="sd">"""Fun with generators. Corresponding Haskell implementation:</span></td> </tr> <tr id="l2" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l2"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l2"> 2</a> </td> </tr> <tr id="l3" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l3"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l3"> 3</a> <span class="sd">primes = 2 : sieve [3, 5..]</span></td> </tr> <tr id="l4" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l4"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <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> </tr> <tr id="l5" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l5"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l5"> 5</a> <span class="sd">"""</span></td> </tr> <tr id="l6" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l6"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l6"> 6</a> </td> </tr> <tr id="l7" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l7"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l7"> 7</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="l8" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l8"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l8"> 8</a> </td> </tr> <tr id="l9" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l9"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <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> </tr> <tr id="l10" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l10"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l10"> 10</a> <span class="sd">"""Generate all primes."""</span></td> </tr> <tr id="l11" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l11"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l12"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l13"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l14"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l15"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l16"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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">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/f4fca47b67e6/primes.py#l17"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l18"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l19"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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/f4fca47b67e6/primes.py#l20"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">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">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></td> </tr> <tr id="l21" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l21"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l21"> 21</a> <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></td> </tr> <tr id="l22" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l22"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l22"> 22</a> </td> </tr> <tr id="l23" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l23"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l23"> 23</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="l24" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l24"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l24"> 24</a> <span class="kn">import</span> <span class="nn">sys</span></td> </tr> <tr id="l25" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l25"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l25"> 25</a> <span class="kn">try</span><span class="p">:</span></td> </tr> <tr id="l26" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l26"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l26"> 26</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="l27" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l27"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l27"> 27</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="l28" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l28"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l28"> 28</a> <span class="n">n</span> <span class="o">=</span> <span class="mi">10</span></td> </tr> <tr id="l29" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l29"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l29"> 29</a> <span class="n">p</span> <span class="o">=</span> <span class="n">primes</span><span class="p">()</span></td> </tr> <tr id="l30" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l30"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l30"> 30</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">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="l31" class="thisrev"> <td class="annotate parity0"> <div class="annotate-info"> <div> <a href="/annotate/f4fca47b67e6/primes.py#l31"> f4fca47b67e6</a> a </div> <div><em>test</em></div> <div>parents: </div> <a href="/diff/f4fca47b67e6/primes.py">diff</a> <a href="/rev/f4fca47b67e6">changeset</a> </div> </td> <td class="source followlines-btn-parent"><a href="#l31"> 31</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 ..