Merge from master for misc fixes.

8 files changed, 78 insertions, 16 deletions

diff --git a/Documentation/git-cvsimport-script.txt b/Documentation/git-cvsimport-script.txt
index ae46b2f072..d01a15d8a3 100644
--- a/Documentation/git-cvsimport-script.txt
+++ b/Documentation/git-cvsimport-script.txt
@@ -12,7 +12,7 @@ SYNOPSIS
 'git-cvsimport-script' [ -o <branch-for-HEAD> ] [ -h ] [ -v ]
 			[ -d <CVSROOT> ] [ -p <options-for-cvsps> ]
 			[ -C <GIT_repository> ] [ -i ] [ -k ]
-			[ -s <subst> ] [ <CVS_module> ]
+			[ -s <subst> ] [ -m ] [ -M regex ] [ <CVS_module> ]
 
 
 DESCRIPTION
@@ -58,6 +58,16 @@ OPTIONS
 
 	If you need to pass multiple options, separate them with a comma.
 
+-m::    
+	Attempt to detect merges based on the commit message. This option
+	will enable default regexes that try to capture the name source 
+	branch name from the commit message. 
+
+-M <regex>::
+	Attempt to detect merges based on the commit message with a custom
+	regex. It can be used with -m to also see the default regexes. 
+	You must escape forward slashes. 
+
 -v::
 	Verbosity: let 'cvsimport' report what it is doing.
 
diff --git a/cache.h b/cache.h
index 6365381c17..742378f40f 100644
--- a/cache.h
+++ b/cache.h
@@ -142,6 +142,7 @@ extern char *get_graft_file(void);
 
 extern const char **get_pathspec(const char *prefix, char **pathspec);
 extern const char *setup_git_directory(void);
+extern char *prefix_path(const char *prefix, int len, char *path);
 
 #define alloc_nr(x) (((x)+16)*3/2)
 
diff --git a/git-clone-script b/git-clone-script
index 909ccc5301..99c2459631 100755
--- a/git-clone-script
+++ b/git-clone-script
@@ -81,7 +81,11 @@ yes,yes)
 	    ;;
 	yes)
 	    mkdir -p "$D/.git/objects/info"
-	    echo "$repo/objects" >"$D/.git/objects/info/alternates"
+	    {
+		test -f "$repo/objects/info/alternates" &&
+		cat "$repo/objects/info/alternates";
+		echo "$repo/objects"
+	    } >"$D/.git/objects/info/alternates"
 	    ;;
 	esac
 
diff --git a/git-commit-script b/git-commit-script
index f6cd75f024..15d03913d5 100755
--- a/git-commit-script
+++ b/git-commit-script
@@ -85,11 +85,13 @@ tt*)
   die "Only one of -c/-C/-F/-m can be used." ;;
 esac
 
-case "$all" in
-t)
+case "$all,$#" in
+t,*)
 	git-diff-files --name-only -z |
 	xargs -0 git-update-cache -q --
 	;;
+,0)
+	;;
 *)
 	git-diff-files --name-only -z "$@" |
 	xargs -0 git-update-cache -q --
diff --git a/git-cvsimport-script b/git-cvsimport-script
index 2f39af33d9..e3a8e584a5 100755
--- a/git-cvsimport-script
+++ b/git-cvsimport-script
@@ -28,19 +28,19 @@ use POSIX qw(strftime dup2);
 $SIG{'PIPE'}="IGNORE";
 $ENV{'TZ'}="UTC";
 
-our($opt_h,$opt_o,$opt_v,$opt_k,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_s);
+our($opt_h,$opt_o,$opt_v,$opt_k,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_s,$opt_m,$opt_M);
 
 sub usage() {
 	print STDERR <<END;
 Usage: ${\basename $0}     # fetch/update GIT from CVS
        [ -o branch-for-HEAD ] [ -h ] [ -v ] [ -d CVSROOT ]
        [ -p opts-for-cvsps ] [ -C GIT_repository ] [ -z fuzz ]
-       [ -i ] [ -k ] [-s subst] [ CVS_module ]
+       [ -i ] [ -k ] [-s subst] [ -m ] [ -M regex] [ CVS_module ]
 END
 	exit(1);
 }
 
-getopts("hivko:d:p:C:z:s:") or usage();
+getopts("hivmko:d:p:C:z:s:M:") or usage();
 usage if $opt_h;
 
 @ARGV <= 1 or usage();
@@ -71,11 +71,19 @@ if ($#ARGV == 0) {
 	    die 'Failed to open CVS/Repository';
 	$cvs_tree = <$f>;
 	chomp $cvs_tree;
-	close $f
+	close $f;
 } else {
 	usage();
 }
 
+our @mergerx = ();
+if ($opt_m) {
+	@mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
+}
+if ($opt_M) {
+	push (@mergerx, qr/$opt_M/);
+}
+
 select(STDERR); $|=1; select(STDOUT);
 
 
@@ -375,6 +383,22 @@ sub getwd() {
 	return $pwd;
 }
 
+
+sub get_headref($$) {
+    my $name    = shift;
+    my $git_dir = shift; 
+    my $sha;
+    
+    if (open(C,"$git_dir/refs/heads/$name")) {
+	chomp($sha = <C>);
+	close(C);
+	length($sha) == 40
+	    or die "Cannot get head id for $name ($sha): $!\n";
+    }
+    return $sha;
+}
+
+
 -d $git_tree
 	or mkdir($git_tree,0777)
 	or die "Could not create $git_tree: $!";
@@ -549,6 +573,22 @@ my $commit = sub {
 
 		my @par = ();
 		@par = ("-p",$parent) if $parent;
+
+		# loose detection of merges
+		# based on the commit msg
+		foreach my $rx (@mergerx) {
+			if ($logmsg =~ $rx) {
+				my $mparent = $1;
+				if ($mparent eq 'HEAD') { $mparent = $opt_o };
+				if ( -e "$git_dir/refs/heads/$mparent") {
+					$mparent = get_headref($mparent, $git_dir);
+					push @par, '-p', $mparent;
+					# printing here breaks import # 
+					# # print "Merge parent branch: $mparent\n" if $opt_v;
+				}
+		    	} 
+		}
+
 		exec("env",
 			"GIT_AUTHOR_NAME=$author",
 			"GIT_AUTHOR_EMAIL=$author",
diff --git a/git-rebase-script b/git-rebase-script
index 026225ab2c..7b1d4900bd 100755
--- a/git-rebase-script
+++ b/git-rebase-script
@@ -17,16 +17,19 @@ case "$#,$1" in
     shift ;;
 esac
 
+git-update-cache --refresh || exit
+
 case "$#" in
-1) upstream=`git-rev-parse --verify "$1"` &&
-   ours=`git-rev-parse --verify HEAD` || exit
-   ;;
-2) upstream=`git-rev-parse --verify "$1"` &&
-   ours=`git-rev-parse --verify "$2"` || exit
-   ;;
-*) echo >&2 "$usage"; exit 1 ;;
+1) ours_symbolic=HEAD ;;
+2) ours_symbolic="$2" ;;
+*) die "$usage" ;;
 esac
 
+upstream=`git-rev-parse --verify "$1"` &&
+ours=`git-rev-parse --verify "$ours_symbolic^` || exit
+test "$(git-diff-cache --cached "$ours")" = "" || 
+die "Your working tree does not match $ours_symbolic."
+
 git-read-tree -m -u $ours $upstream &&
 git-rev-parse --verify "$upstream^0" >"$GIT_DIR/HEAD" || exit
 
diff --git a/setup.c b/setup.c
index 1710b16854..b8789de5c5 100644
--- a/setup.c
+++ b/setup.c
@@ -1,6 +1,6 @@
 #include "cache.h"
 
-static char *prefix_path(const char *prefix, int len, char *path)
+char *prefix_path(const char *prefix, int len, char *path)
 {
 	char *orig = path;
 	for (;;) {
diff --git a/update-cache.c b/update-cache.c
index 1fcc59a9c0..63815ed658 100644
--- a/update-cache.c
+++ b/update-cache.c
@@ -321,6 +321,7 @@ int main(int argc, char **argv)
 {
 	int i, newfd, entries, has_errors = 0;
 	int allow_options = 1;
+	const char *prefix = setup_git_directory();
 
 	newfd = hold_index_file_for_update(&cache_file, get_index_file());
 	if (newfd < 0)
@@ -381,6 +382,7 @@ int main(int argc, char **argv)
 			}
 			die("unknown option %s", path);
 		}
+		path = prefix_path(prefix, prefix ? strlen(prefix) : 0, path);
 		if (!verify_path(path)) {
 			fprintf(stderr, "Ignoring path %s\n", argv[i]);
 			continue;