Builtin git-diff-files, git-diff-index, git-diff-stages, and git-diff-tree.

[git.git] / builtin-diff-files.c

diff --git a/builtin-diff-files.c b/builtin-diff-files.c
new file mode 100644 (file)
index 0000000..cebda82
--- /dev/null
+++ b/builtin-diff-files.c
@@ -0,0 +1,55 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "cache.h"
+#include "diff.h"
+#include "commit.h"
+#include "revision.h"
+#include "builtin.h"
+
+static const char diff_files_usage[] =
+"git-diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
+COMMON_DIFF_OPTIONS_HELP;
+
+int cmd_diff_files(int argc, const char **argv, char **envp)
+{
+       struct rev_info rev;
+       int silent = 0;
+
+       git_config(git_diff_config);
+       init_revisions(&rev);
+       rev.abbrev = 0;
+
+       argc = setup_revisions(argc, argv, &rev, NULL);
+       while (1 < argc && argv[1][0] == '-') {
+               if (!strcmp(argv[1], "--base"))
+                       rev.max_count = 1;
+               else if (!strcmp(argv[1], "--ours"))
+                       rev.max_count = 2;
+               else if (!strcmp(argv[1], "--theirs"))
+                       rev.max_count = 3;
+               else if (!strcmp(argv[1], "-q"))
+                       silent = 1;
+               else
+                       usage(diff_files_usage);
+               argv++; argc--;
+       }
+       /*
+        * Make sure there are NO revision (i.e. pending object) parameter,
+        * rev.max_count is reasonable (0 <= n <= 3),
+        * there is no other revision filtering parameters.
+        */
+       if (rev.pending_objects ||
+           rev.min_age != -1 || rev.max_age != -1)
+               usage(diff_files_usage);
+       /*
+        * Backward compatibility wart - "diff-files -s" used to
+        * defeat the common diff option "-s" which asked for
+        * DIFF_FORMAT_NO_OUTPUT.
+        */
+       if (rev.diffopt.output_format == DIFF_FORMAT_NO_OUTPUT)
+               rev.diffopt.output_format = DIFF_FORMAT_RAW;
+       return run_diff_files(&rev, silent);
+}