[PATCH] Pickaxe fixes.

A bug in the command line argument parsing code was making
pickaxe not to work at all in diff-cache and diff-files commands.
Embarrassingly enough, the working pickaxe in diff-tree tells me
that it was not working in these two commands from day one.
This patch fixes it.

Also updates the documentation to describe the --pickaxe-all option.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

Documentation/git-diff-cache.txt

@@ -9,7 +9,7 @@ git-diff-cache - Compares content and mode of blobs between the cache and reposi
 
 SYNOPSIS
 --------
-'git-diff-cache' [-p] [-r] [-z] [-m] [-M] [-R] [-C] [-S<string>] [--cached] <tree-ish> [<path>...]
+'git-diff-cache' [-p] [-r] [-z] [-m] [-M] [-R] [-C] [-S<string>] [--pickaxe-all] [--cached] <tree-ish> [<path>...]
 
 DESCRIPTION
 -----------
@@ -44,6 +44,10 @@ OPTIONS
 -S<string>::
 	Look for differences that contains the change in <string>.
 
+--pickaxe-all::
+	When -S finds a change, show all the changes in that
+	changeset, not just the files that contains the change
+	in <string>.
 
 -R::
 	Output diff in reverse.

Documentation/git-diff-files.txt

@@ -9,7 +9,7 @@ git-diff-files - Compares files in the working tree and the cache
 
 SYNOPSIS
 --------
-'git-diff-files' [-p] [-q] [-r] [-z] [-M] [-C] [-R] [-S<string>] [<pattern>...]
+'git-diff-files' [-p] [-q] [-r] [-z] [-M] [-C] [-R] [-S<string>] [--pickaxe-all] [<pattern>...]
 
 DESCRIPTION
 -----------
@@ -38,6 +38,10 @@ OPTIONS
 -S<string>::
 	Look for differences that contains the change in <string>.
 
+--pickaxe-all::
+	When -S finds a change, show all the changes in that
+	changeset, not just the files that contains the change
+	in <string>.
 
 -r::
 	This flag does not mean anything.  It is there only to match

Documentation/git-diff-tree.txt

@@ -9,7 +9,7 @@ git-diff-tree - Compares the content and mode of blobs found via two tree object
 
 SYNOPSIS
 --------
-'git-diff-tree' [-p] [-r] [-z] [--stdin] [-M] [-R] [-C] [-S<string>] [-m] [-s] [-v] [-t] <tree-ish> <tree-ish> [<pattern>]\*
+'git-diff-tree' [-p] [-r] [-z] [--stdin] [-M] [-R] [-C] [-S<string>] [--pickaxe-all] [-m] [-s] [-v] [-t] <tree-ish> <tree-ish> [<pattern>]\*
 
 DESCRIPTION
 -----------
@@ -45,6 +45,11 @@ OPTIONS
 -S<string>::
 	Look for differences that contains the change in <string>.
 
+--pickaxe-all::
+	When -S finds a change, show all the changes in that
+	changeset, not just the files that contains the change
+	in <string>.
+
 -r::
 	recurse
 

diff-cache.c

@@ -206,7 +206,7 @@ int main(int argc, const char **argv)
 			diff_setup_opt |= DIFF_SETUP_REVERSE;
 			continue;
 		}
-		if (!strcmp(arg, "-S")) {
+		if (!strncmp(arg, "-S", 2)) {
 			pickaxe = arg + 2;
 			continue;
 		}

diff-files.c

@@ -53,7 +53,7 @@ int main(int argc, const char **argv)
 			diff_output_format = DIFF_FORMAT_MACHINE;
 		else if (!strcmp(argv[1], "-R"))
 			diff_setup_opt |= DIFF_SETUP_REVERSE;
-		else if (!strcmp(argv[1], "-S"))
+		else if (!strncmp(argv[1], "-S", 2))
 			pickaxe = argv[1] + 2;
 		else if (!strcmp(argv[1], "--pickaxe-all"))
 			pickaxe_opts = DIFF_PICKAXE_ALL;