status: prefer relative paths in Rust code … when the repository root is under the current directory, so the kernel needs to traverse fewer directory in every call to `read_dir` or `symlink_metadata`. Better yet would be to use libc functions like `openat` and `fstatat` to remove such repeated traversals entirely, but the standard library does not provide APIs based on those. Maybe with a crate like https://crates.io/crates/openat instead? Benchmarks of `rhg status` show that this patch is neutral in some configurations, and makes the command up to ~20% faster in others. Below is semi-arbitrary subset of results. The four numeric columns are: time (in seconds) with this changeset’s parent, time with this changeset, time difference (negative is better), time ratio (less than 1 is better). ``` mercurial-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.0061 -> 0.0059: -0.0002 (0.97) mercurial-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0029 -> 0.0028: -0.0001 (0.97) mozilla-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.2110 -> 0.2102: -0.0007 (1.00) mozilla-dirstate-v2 | default-copies-clean.ignored.pbr | 0.0489 -> 0.0401: -0.0088 (0.82) mozilla-dirstate-v2 | default-copies-clean.no-iu.pbr | 0.0479 -> 0.0393: -0.0085 (0.82) mozilla-dirstate-v2 | default-copies-large.all.pbr | 0.1262 -> 0.1210: -0.0051 (0.96) mozilla-dirstate-v2 | default-copies-small.ignored-unknown.pbr | 0.1262 -> 0.1200: -0.0062 (0.95) mozilla-dirstate-v2 | default-copies-small.ignored.pbr | 0.0536 -> 0.0417: -0.0119 (0.78) mozilla-dirstate-v2 | default-copies-small.no-iu.pbr | 0.0482 -> 0.0393: -0.0089 (0.81) mozilla-dirstate-v2 | default-plain-clean.ignored.pbr | 0.0518 -> 0.0402: -0.0116 (0.78) mozilla-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0481 -> 0.0392: -0.0088 (0.82) mozilla-dirstate-v2 | default-plain-large.all.pbr | 0.1271 -> 0.1218: -0.0052 (0.96) mozilla-dirstate-v2 | default-plain-small.ignored-unknown.pbr | 0.1225 -> 0.1202: -0.0022 (0.98) mozilla-dirstate-v2 | default-plain-small.ignored.pbr | 0.0510 -> 0.0418: -0.0092 (0.82) mozilla-dirstate-v2 | default-plain-small.no-iu.pbr | 0.0480 -> 0.0394: -0.0086 (0.82) netbeans-dirstate-v1 | default-plain-clean.no-iu.pbr | 0.1442 -> 0.1422: -0.0020 (0.99) netbeans-dirstate-v2 | default-plain-clean.no-iu.pbr | 0.0325 -> 0.0282: -0.0043 (0.87) ``` Differential Revision: https://phab.mercurial-scm.org/D12175

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

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This tests if CGI files from before d0db3462d568 still work.

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  $ hg init test

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  $ cat >hgweb.cgi <<HGWEB

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  > #!"$PYTHON"

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  > #

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  > # An example CGI script to use hgweb, edit as necessary

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  > 

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  > import cgitb, os, sys

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  > cgitb.enable()

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  > 

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  > # sys.path.insert(0, "/path/to/python/lib") # if not a system-wide install

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  > from mercurial import hgweb

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  > 

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  > h = hgweb.hgweb(b"test", b"Empty test repository")

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  > h.run()

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  > HGWEB

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  $ chmod 755 hgweb.cgi

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  $ cat >hgweb.config <<HGWEBDIRCONF

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  > [paths]

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  > test = test

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  > HGWEBDIRCONF

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  $ cat >hgwebdir.cgi <<HGWEBDIR

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  > #!"$PYTHON"

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  > #

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  > # An example CGI script to export multiple hgweb repos, edit as necessary

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  > 

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  > import cgitb, sys

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  > cgitb.enable()

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  > 

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  > # sys.path.insert(0, "/path/to/python/lib") # if not a system-wide install

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  > from mercurial import hgweb

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  > 

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  > # The config file looks like this.  You can have paths to individual

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  > # repos, collections of repos in a directory tree, or both.

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  > #

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  > # [paths]

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  > # virtual/path = /real/path

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  > # virtual/path = /real/path

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  > #

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  > # [collections]

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  > # /prefix/to/strip/off = /root/of/tree/full/of/repos

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  > #

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  > # collections example: say directory tree /foo contains repos /foo/bar,

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  > # /foo/quux/baz.  Give this config section:

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  > #   [collections]

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  > #   /foo = /foo

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  > # Then repos will list as bar and quux/baz.

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  > 

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  > # Alternatively you can pass a list of ('virtual/path', '/real/path') tuples

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  > # or use a dictionary with entries like 'virtual/path': '/real/path'

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  > 

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  > h = hgweb.hgwebdir(b"hgweb.config")

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  > h.run()

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  > HGWEBDIR

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  $ chmod 755 hgwebdir.cgi

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  $ . "$TESTDIR/cgienv"

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  $ "$PYTHON" hgweb.cgi > page1

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  $ "$PYTHON" hgwebdir.cgi > page2

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  $ PATH_INFO="/test/"

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  $ PATH_TRANSLATED="/var/something/test.cgi"

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  $ REQUEST_URI="/test/test/"

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  $ SCRIPT_URI="http://hg.omnifarious.org/test/test/"

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  $ SCRIPT_URL="/test/test/"

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  $ "$PYTHON" hgwebdir.cgi > page3

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  $ grep -i error page1 page2 page3

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