diff tests/test-hgignore.t @ 41282:4fab8a7d2d72

match: support rooted globs in hgignore

In a .hgignore, "glob:foo" always means "**/foo". This cannot be
avoided because there is no syntax like "^" in regexes to say you
don't want the implied "**/" (of course one can use regexes, but glob
syntax is nice).

When you have a long list of fairly specific globs like
path/to/some/thing, this has two consequences:
1. unintended files may be ignored (not too common though)
2. matching performance can suffer significantly
  Here is vanilla hg status timing on a private repository:

  Using syntax:glob everywhere
  real	0m2.199s
  user	0m1.545s
  sys	0m0.619s

  When rooting the appropriate globs
  real	0m1.434s
  user	0m0.847s
  sys	0m0.565s

  (tangentially, none of this shows up in --profile's output. It
   seems that C code doesn't play well with profiling)

The code already supports this but there is no syntax to make use of
it, so it seems reasonable to create such syntax. I create a new
hgignore syntax "rootglob".

Differential Revision: https://phab.mercurial-scm.org/D5493

--- a/tests/test-hgignore.t	Wed Nov 07 15:45:09 2018 -0800
+++ b/tests/test-hgignore.t	Thu Jan 03 19:02:46 2019 -0500
@@ -239,6 +239,17 @@
   dir/c.o is ignored
   (ignore rule in $TESTTMP/ignorerepo/.hgignore, line 2: 'dir/**/c.o') (glob)
 
+Check rooted globs
+
+  $ hg purge --all --config extensions.purge=
+  $ echo "syntax: rootglob" > .hgignore
+  $ echo "a/*.ext" >> .hgignore
+  $ for p in a b/a aa; do mkdir -p $p; touch $p/b.ext; done
+  $ hg status -A 'set:**.ext'
+  ? aa/b.ext
+  ? b/a/b.ext
+  I a/b.ext
+
 Check using 'include:' in ignore file
 
   $ hg purge --all --config extensions.purge=
@@ -257,10 +268,15 @@
 Check recursive uses of 'include:'
 
   $ echo "include:nested/ignore" >> otherignore
-  $ mkdir nested
+  $ mkdir nested nested/more
   $ echo "glob:*ignore" > nested/ignore
+  $ echo "rootglob:a" >> nested/ignore
+  $ touch a nested/a nested/more/a
   $ hg status
   A dir/b.o
+  ? nested/a
+  ? nested/more/a
+  $ rm a nested/a nested/more/a
 
   $ cp otherignore goodignore
   $ echo "include:badignore" >> otherignore
@@ -291,18 +307,26 @@
   ? dir1/file2
   ? dir2/file1
 
-Check including subincludes with regexs
+Check including subincludes with other patterns
 
   $ echo "subinclude:dir1/.hgignore" >> .hgignore
+
+  $ mkdir dir1/subdir
+  $ touch dir1/subdir/file1
+  $ echo "rootglob:f?le1" > dir1/.hgignore
+  $ hg status
+  ? dir1/file2
+  ? dir1/subdir/file1
+  ? dir2/file1
+  $ rm dir1/subdir/file1
+
   $ echo "regexp:f.le1" > dir1/.hgignore
-
   $ hg status
   ? dir1/file2
   ? dir2/file1
 
 Check multiple levels of sub-ignores
 
-  $ mkdir dir1/subdir
   $ touch dir1/subdir/subfile1 dir1/subdir/subfile3 dir1/subdir/subfile4
   $ echo "subinclude:subdir/.hgignore" >> dir1/.hgignore
   $ echo "glob:subfil*3" >> dir1/subdir/.hgignore