Find files via git-grep instead of git-ls-files

It would be preferable to use git-ls-files as it is more suited for our
purposes, however git-grep allows us to filter out binary files.  It
makes no sense to regex match in a binary file, so this is crucial.

2 files changed, 13 insertions, 15 deletions

diff --git a/man/grab.1 b/man/grab.1
index ec03068..a5e3a32 100644
--- a/man/grab.1
+++ b/man/grab.1
@@ -1,4 +1,4 @@
-.Dd 23 January, 2024
+.Dd 24 January, 2024
 .Dt GRAB 1
 .Os Grab 2.1.1
 .Sh NAME
@@ -46,14 +46,11 @@ utility in all ways except for two exceptions.
 The first is that if no files
 .Pq globs in this case to be precise
 are specified,
-input is not read from the standard-input but instead all files returned
-by an invocation of
-.Xr git\-ls\-files 1
-are processed.
+input is not read from the standard-input but instead all non-binary
+files found in the current git-repository are processed.
 If the user provides one or more globs,
-only the files returned by
-.Xr git\-ls\-files 1
-that match one or more of the given globs will be processed.
+only the non-binary files in the current git-repository that match one or
+more of the given globs will be processed.
 Secondly, the
 .Fl f
 option is not available;
@@ -315,7 +312,7 @@ formatted manual pages:
 .Pp
 .Dl $ grab \-n 'x/^\e.Sh SYNOPSIS\en(^.*\en(?!^\e.Sh))+/' foo.1 bar.1
 .Sh SEE ALSO
-.Xr git\-ls\-files 1 ,
+.Xr git 1 ,
 .Xr grep 1 ,
 .Xr pcre2syntax 3 ,
 .Xr regex 7
diff --git a/src/grab.c b/src/grab.c
index 601d81e..300a787 100644
--- a/src/grab.c
+++ b/src/grab.c
@@ -804,7 +804,7 @@ getfstream(int argc, char *argv[argc])
 	case -1:
 		die("fork");
 	case 0:;
-		size_t len = argc + 5;
+		size_t len = argc + 6;
 		char **args;
 
 		close(fds[FD_R]);
@@ -815,14 +815,15 @@ getfstream(int argc, char *argv[argc])
 		if (!(args = malloc(len * sizeof(char *))))
 			die("malloc");
 		args[0] = "git";
-		args[1] = "ls-files";
-		args[2] = "-z";
-		args[3] = "--";
-		memcpy(args + 4, argv, argc * sizeof(char *));
+		args[1] = "grep";
+		args[2] = "--cached";
+		args[3] = "-Ilz";
+		args[4] = "";
+		memcpy(args + 5, argv, argc * sizeof(char *));
 		args[len - 1] = nullptr;
 
 		execvp("git", args);
-		die("execvp: git ls-files -z");
+		die("execvp: git grep --cached -Ilz ''");
 	}
 
 	close(fds[FD_W]);