debugignore: eliminate inconsistencies with `hg status` (issue5222)

debugignore: eliminate inconsistencies with `hg status` (issue5222)

Using a matcher for this command allows processing the named file(s) as
relative to cwd.  It also leverages the icasefs normalization logic the same
way the status command does.  (However, a false indicator is given for a
nonexistent file in some cases, e.g. passing 'foo.REJ' when that file doesn't
exist, and the rule is '*.rej'.  Maybe the regex itself needs to be case
insensitive on these platforms, at least for the debug command.)  Finally, the
file printed is relative to cwd and uses platform specific slashes, so a few
(glob)s were needed in seemingly unrelated tests.

--- a/mercurial/debugcommands.py	Sun Jul 16 04:39:32 2017 -0700
+++ b/mercurial/debugcommands.py	Sat Jul 15 15:23:29 2017 -0400
@@ -866,7 +866,8 @@
         # Show all the patterns
         ui.write("%s\n" % repr(ignore))
     else:
-        for f in files:
+        m = scmutil.match(repo[None], pats=files)
+        for f in m.files():
             nf = util.normpath(f)
             ignored = None
             ignoredata = None
@@ -882,16 +883,16 @@
                             break
             if ignored:
                 if ignored == nf:
-                    ui.write(_("%s is ignored\n") % f)
+                    ui.write(_("%s is ignored\n") % m.uipath(f))
                 else:
                     ui.write(_("%s is ignored because of "
                                "containing folder %s\n")
-                             % (f, ignored))
+                             % (m.uipath(f), ignored))
                 ignorefile, lineno, line = ignoredata
                 ui.write(_("(ignore rule in %s, line %d: '%s')\n")
                          % (ignorefile, lineno, line))
             else:
-                ui.write(_("%s is not ignored\n") % f)
+                ui.write(_("%s is not ignored\n") % m.uipath(f))
 
 @command('debugindex', cmdutil.debugrevlogopts +
     [('f', 'format', 0, _('revlog format'), _('FORMAT'))],

--- a/tests/test-hgignore.t	Sun Jul 16 04:39:32 2017 -0700
+++ b/tests/test-hgignore.t	Sat Jul 15 15:23:29 2017 -0400
@@ -52,6 +52,35 @@
   abort: $TESTTMP/ignorerepo/.hgignore: invalid pattern (relre): *.o (glob)
   [255]
 
+Ensure given files are relative to cwd
+
+  $ echo "dir/.*\.o" > .hgignore
+  $ hg status -i
+  I dir/c.o
+
+  $ hg debugignore dir/c.o dir/missing.o
+  dir/c.o is ignored (glob)
+  (ignore rule in $TESTTMP/ignorerepo/.hgignore, line 1: 'dir/.*\.o') (glob)
+  dir/missing.o is ignored (glob)
+  (ignore rule in $TESTTMP/ignorerepo/.hgignore, line 1: 'dir/.*\.o') (glob)
+  $ cd dir
+  $ hg debugignore c.o missing.o
+  c.o is ignored
+  (ignore rule in $TESTTMP/ignorerepo/.hgignore, line 1: 'dir/.*\.o') (glob)
+  missing.o is ignored
+  (ignore rule in $TESTTMP/ignorerepo/.hgignore, line 1: 'dir/.*\.o') (glob)
+
+For icasefs, inexact matches also work, except for missing files
+
+#if icasefs
+  $ hg debugignore c.O missing.O
+  c.o is ignored
+  (ignore rule in $TESTTMP/ignorerepo/.hgignore, line 1: 'dir/.*\.o') (glob)
+  missing.O is not ignored
+#endif
+
+  $ cd ..
+
   $ echo ".*\.o" > .hgignore
   $ hg status
   A dir/b.o
@@ -207,7 +236,7 @@
   $ hg debugignore a.c
   a.c is not ignored
   $ hg debugignore dir/c.o
-  dir/c.o is ignored
+  dir/c.o is ignored (glob)
   (ignore rule in $TESTTMP/ignorerepo/.hgignore, line 2: 'dir/**/c.o') (glob)
 
 Check using 'include:' in ignore file
@@ -293,7 +322,7 @@
   $ hg status | grep file2
   [1]
   $ hg debugignore dir1/file2
-  dir1/file2 is ignored
+  dir1/file2 is ignored (glob)
   (ignore rule in dir2/.hgignore, line 1: 'file*2')
 
 #if windows