view tests/test-install.t @ 29787:80df04266a16

hgweb: profile HTTP requests

Currently, running `hg serve --profile` doesn't yield anything useful:
when the process is terminated the profiling output displays results
from the main thread, which typically spends most of its time in
select.select(). Furthermore, it has no meaningful results from
mercurial.* modules because the threads serving HTTP requests don't
actually get profiled.

This patch teaches the hgweb wsgi applications to profile individual
requests. If profiling is enabled, the profiler kicks in after
HTTP/WSGI environment processing but before Mercurial's main request
processing.

The profile results are printed to the configured profiling output.
If running `hg serve` from a shell, they will be printed to stderr,
just before the HTTP request line is logged. If profiling to a file,
we only write a single profile to the file because the file is not
opened in append mode. We could add support for appending to files
in a future patch if someone wants it.

Per request profiling doesn't work with the statprof profiler because
internally that profiler collects samples from the thread that
*initially* requested profiling be enabled. I have plans to address
this by vendoring Facebook's customized statprof and then improving
it.

hg debuginstall
  $ hg debuginstall
  checking encoding (ascii)...
  checking Python executable (*) (glob)
  checking Python version (2.*) (glob)
  checking Python lib (*lib*)... (glob)
  checking Mercurial version (*) (glob)
  checking Mercurial custom build (*) (glob)
  checking module policy (*) (glob)
  checking installed modules (*mercurial)... (glob)
  checking templates (*mercurial?templates)... (glob)
  checking default template (*mercurial?templates?map-cmdline.default) (glob)
  checking commit editor... (* -c "import sys; sys.exit(0)") (glob)
  checking username (test)
  no problems detected

hg debuginstall JSON
  $ hg debuginstall -Tjson | sed 's|\\\\|\\|g'
  [
   {
    "defaulttemplate": "*mercurial?templates?map-cmdline.default", (glob)
    "defaulttemplateerror": null,
    "defaulttemplatenotfound": "default",
    "editor": "* -c \"import sys; sys.exit(0)\"", (glob)
    "editornotfound": false,
    "encoding": "ascii",
    "encodingerror": null,
    "extensionserror": null,
    "hgmodulepolicy": "*", (glob)
    "hgmodules": "*mercurial", (glob)
    "hgver": "*", (glob)
    "hgverextra": "*", (glob)
    "problems": 0,
    "pythonexe": "*", (glob)
    "pythonlib": "*", (glob)
    "pythonver": "*.*.*", (glob)
    "templatedirs": "*mercurial?templates", (glob)
    "username": "test",
    "usernameerror": null,
    "vinotfound": false
   }
  ]

hg debuginstall with no username
  $ HGUSER= hg debuginstall
  checking encoding (ascii)...
  checking Python executable (*) (glob)
  checking Python version (2.*) (glob)
  checking Python lib (*lib*)... (glob)
  checking Mercurial version (*) (glob)
  checking Mercurial custom build (*) (glob)
  checking module policy (*) (glob)
  checking installed modules (*mercurial)... (glob)
  checking templates (*mercurial?templates)... (glob)
  checking default template (*mercurial?templates?map-cmdline.default) (glob)
  checking commit editor... (* -c "import sys; sys.exit(0)") (glob)
  checking username...
   no username supplied
   (specify a username in your configuration file)
  1 problems detected, please check your install!
  [1]

path variables are expanded (~ is the same as $TESTTMP)
  $ mkdir tools
  $ touch tools/testeditor.exe
#if execbit
  $ chmod 755 tools/testeditor.exe
#endif
  $ hg debuginstall --config ui.editor=~/tools/testeditor.exe
  checking encoding (ascii)...
  checking Python executable (*) (glob)
  checking Python version (*) (glob)
  checking Python lib (*lib*)... (glob)
  checking Mercurial version (*) (glob)
  checking Mercurial custom build (*) (glob)
  checking module policy (*) (glob)
  checking installed modules (*mercurial)... (glob)
  checking templates (*mercurial?templates)... (glob)
  checking default template (*mercurial?templates?map-cmdline.default) (glob)
  checking commit editor... (* -c "import sys; sys.exit(0)") (glob)
  checking username (test)
  no problems detected

#if test-repo
  $ . "$TESTDIR/helpers-testrepo.sh"

  $ cat >> wixxml.py << EOF
  > import os, subprocess, sys
  > import xml.etree.ElementTree as ET
  > 
  > # MSYS mangles the path if it expands $TESTDIR
  > testdir = os.environ['TESTDIR']
  > ns = {'wix' : 'http://schemas.microsoft.com/wix/2006/wi'}
  > 
  > def directory(node, relpath):
  >     '''generator of files in the xml node, rooted at relpath'''
  >     dirs = node.findall('./{%(wix)s}Directory' % ns)
  > 
  >     for d in dirs:
  >         for subfile in directory(d, relpath + d.attrib['Name'] + '/'):
  >             yield subfile
  > 
  >     files = node.findall('./{%(wix)s}Component/{%(wix)s}File' % ns)
  > 
  >     for f in files:
  >         yield relpath + f.attrib['Name']
  > 
  > def hgdirectory(relpath):
  >     '''generator of tracked files, rooted at relpath'''
  >     hgdir = "%s/../mercurial" % (testdir)
  >     args = ['hg', '--cwd', hgdir, 'files', relpath]
  >     proc = subprocess.Popen(args, stdout=subprocess.PIPE,
  >                             stderr=subprocess.PIPE)
  >     output = proc.communicate()[0]
  > 
  >     slash = '/'
  >     for line in output.splitlines():
  >         if os.name == 'nt':
  >             yield line.replace(os.sep, slash)
  >         else:
  >             yield line
  > 
  > tracked = [f for f in hgdirectory(sys.argv[1])]
  > 
  > xml = ET.parse("%s/../contrib/wix/%s.wxs" % (testdir, sys.argv[1]))
  > root = xml.getroot()
  > dir = root.find('.//{%(wix)s}DirectoryRef' % ns)
  > 
  > installed = [f for f in directory(dir, '')]
  > 
  > print('Not installed:')
  > for f in sorted(set(tracked) - set(installed)):
  >     print('  %s' % f)
  > 
  > print('Not tracked:')
  > for f in sorted(set(installed) - set(tracked)):
  >     print('  %s' % f)
  > EOF

  $ python wixxml.py help
  Not installed:
    help/common.txt
    help/hg-ssh.8.txt
    help/hg.1.txt
    help/hgignore.5.txt
    help/hgrc.5.txt
  Not tracked:

  $ python wixxml.py templates
  Not installed:
  Not tracked:

#endif