Merge branch 'maint'

* maint:
  Documentation: show-ref: document --exclude-existing
  cvsexportcommit -p : fix the usage of git-apply -C.

Documentation/git-show-ref.txt

@@ -10,6 +10,7 @@ SYNOPSIS
 [verse]
 'git-show-ref' [-q|--quiet] [--verify] [-h|--head] [-d|--dereference]
 	     [-s|--hash] [--abbrev] [--tags] [--heads] [--] <pattern>...
+'git-show-ref' --exclude-existing[=pattern]
 
 DESCRIPTION
 -----------
@@ -19,6 +20,9 @@ commit IDs. Results can be filtered using a pattern and tags can be
 dereferenced into object IDs. Additionally, it can be used to test whether a
 particular ref exists.
 
+The --exclude-existing form is a filter that does the inverse, it shows the
+refs from stdin that don't exist in the local repository.
+
 Use of this utility is encouraged in favor of directly accessing files under
 in the `.git` directory.
 
@@ -61,6 +65,18 @@ OPTIONS
 	Do not print any results to stdout. When combined with '--verify' this
 	can be used to silently check if a reference exists.
 
+--exclude-existing, --exclude-existing=pattern::
+
+	Make git-show-ref act as a filter that reads refs from stdin of the
+	form "^(?:<anything>\s)?<refname>(?:\^\{\})?$" and performs the
+	following actions on each:
+	(1) strip "^{}" at the end of line if any;
+	(2) ignore if pattern is provided and does not head-match refname;
+	(3) warn if refname is not a well-formed refname and skip;
+	(4) ignore if refname is a ref that exists in the local repository;
+	(5) otherwise output the line.
+
+
 <pattern>::
 
 	Show references matching one or more patterns.

git-cvsexportcommit.perl

@@ -124,12 +124,17 @@ close MSG;
 `git-diff-tree --binary -p $parent $commit >.cvsexportcommit.diff`;# || die "Cannot diff";
 
 ## apply non-binary changes
-my $fuzz = $opt_p ? 0 : 2;
+
+# In pedantic mode require all lines of context to match.  In normal
+# mode, be compatible with diff/patch: assume 3 lines of context and
+# require at least one line match, i.e. ignore at most 2 lines of
+# context, like diff/patch do by default.
+my $context = $opt_p ? '' : '-C1';
 
 print "Checking if patch will apply\n";
 
 my @stat;
-open APPLY, "GIT_DIR= git-apply -C$fuzz --binary --summary --numstat<.cvsexportcommit.diff|" || die "cannot patch";
+open APPLY, "GIT_DIR= git-apply $context --binary --summary --numstat<.cvsexportcommit.diff|" || die "cannot patch";
 @stat=<APPLY>;
 close APPLY || die "Cannot patch";
 my (@bfiles,@files,@afiles,@dfiles);
@@ -196,7 +201,7 @@ if ($dirty) {
 }
 
 print "Applying\n";
-`GIT_DIR= git-apply -C$fuzz --binary --summary --numstat --apply <.cvsexportcommit.diff` || die "cannot patch";
+`GIT_DIR= git-apply $context --binary --summary --numstat --apply <.cvsexportcommit.diff` || die "cannot patch";
 
 print "Patch applied successfully. Adding new files and directories to CVS\n";
 my $dirtypatch = 0;