view tests/test-oldcgi.t @ 30446:b324b4e431e5

posix: give checkexec a fast path; keep the check files and test read only

Before, Mercurial would create a new temporary file every time, stat it, change
its exec mode, stat it again, and delete it. Most of this dance was done to
handle the rare and not-so-essential case of VFAT mounts on unix. The cost of
that was paid by the much more common and important case of using normal file
systems.

Instead, try to create and preserve .hg/cache/checkisexec and
.hg/cache/checknoexec with and without exec flag set. If the files exist and
have correct exec flags set, we can conclude that that file system supports the
exec flag. Best case, the whole exec check can thus be done with two stat
calls. Worst case, we delete the wrong files and check as usual. That will be
because temporary loss of exec bit or on file systems without support for the
exec bit. In that case we check as we did before, with the additional overhead
of one extra stat call.

It is possible that this different test algorithm in some cases on odd file
systems will give different behaviour. Again, I think it will be rare and
special cases and I think it is worth the risk.

test-clone.t happens to show the situation where checkisexec is left behind
from the old style check, while checknoexec only will be created next time a
exec check will be performed.

#require no-msys # MSYS will translate web paths as if they were file paths

This tests if CGI files from before d0db3462d568 still work.

  $ hg init test
  $ cat >hgweb.cgi <<HGWEB
  > #!/usr/bin/env python
  > #
  > # An example CGI script to use hgweb, edit as necessary
  > 
  > import cgitb, os, sys
  > cgitb.enable()
  > 
  > # sys.path.insert(0, "/path/to/python/lib") # if not a system-wide install
  > from mercurial import hgweb
  > 
  > h = hgweb.hgweb("test", "Empty test repository")
  > h.run()
  > HGWEB

  $ chmod 755 hgweb.cgi

  $ cat >hgweb.config <<HGWEBDIRCONF
  > [paths]
  > test = test
  > HGWEBDIRCONF

  $ cat >hgwebdir.cgi <<HGWEBDIR
  > #!/usr/bin/env python
  > #
  > # An example CGI script to export multiple hgweb repos, edit as necessary
  > 
  > import cgitb, sys
  > cgitb.enable()
  > 
  > # sys.path.insert(0, "/path/to/python/lib") # if not a system-wide install
  > from mercurial import hgweb
  > 
  > # The config file looks like this.  You can have paths to individual
  > # repos, collections of repos in a directory tree, or both.
  > #
  > # [paths]
  > # virtual/path = /real/path
  > # virtual/path = /real/path
  > #
  > # [collections]
  > # /prefix/to/strip/off = /root/of/tree/full/of/repos
  > #
  > # collections example: say directory tree /foo contains repos /foo/bar,
  > # /foo/quux/baz.  Give this config section:
  > #   [collections]
  > #   /foo = /foo
  > # Then repos will list as bar and quux/baz.
  > 
  > # Alternatively you can pass a list of ('virtual/path', '/real/path') tuples
  > # or use a dictionary with entries like 'virtual/path': '/real/path'
  > 
  > h = hgweb.hgwebdir("hgweb.config")
  > h.run()
  > HGWEBDIR

  $ chmod 755 hgwebdir.cgi

  $ . "$TESTDIR/cgienv"
  $ python hgweb.cgi > page1
  $ python hgwebdir.cgi > page2

  $ PATH_INFO="/test/"
  $ PATH_TRANSLATED="/var/something/test.cgi"
  $ REQUEST_URI="/test/test/"
  $ SCRIPT_URI="http://hg.omnifarious.org/test/test/"
  $ SCRIPT_URL="/test/test/"
  $ python hgwebdir.cgi > page3

  $ grep -i error page1 page2 page3
  [1]