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-rw-r--r--builtin/diff-files.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/builtin/diff-files.c b/builtin/diff-files.c
new file mode 100644
index 0000000..dc991f7
--- /dev/null
+++ b/builtin/diff-files.c
@@ -0,0 +1,88 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "cache.h"
+#include "config.h"
+#include "diff.h"
+#include "diff-merges.h"
+#include "commit.h"
+#include "revision.h"
+#include "builtin.h"
+#include "submodule.h"
+
+static const char diff_files_usage[] =
+"git diff-files [-q] [-0 | -1 | -2 | -3 | -c | --cc] [<common-diff-options>] [<path>...]"
+"\n"
+COMMON_DIFF_OPTIONS_HELP;
+
+int cmd_diff_files(int argc, const char **argv, const char *prefix)
+{
+ struct rev_info rev;
+ int result;
+ unsigned options = 0;
+
+ if (argc == 2 && !strcmp(argv[1], "-h"))
+ usage(diff_files_usage);
+
+ git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
+ repo_init_revisions(the_repository, &rev, prefix);
+ rev.abbrev = 0;
+
+ /*
+ * Consider "intent-to-add" files as new by default, unless
+ * explicitly specified in the command line or anywhere else.
+ */
+ rev.diffopt.ita_invisible_in_index = 1;
+
+ prefix = precompose_argv_prefix(argc, argv, prefix);
+
+ 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"))
+ options |= DIFF_SILENT_ON_REMOVED;
+ else
+ usage(diff_files_usage);
+ argv++; argc--;
+ }
+ if (!rev.diffopt.output_format)
+ rev.diffopt.output_format = DIFF_FORMAT_RAW;
+ rev.diffopt.rotate_to_strict = 1;
+
+ /*
+ * Make sure there are NO revision (i.e. pending object) parameter,
+ * rev.max_count is reasonable (0 <= n <= 3), and
+ * there is no other revision filtering parameters.
+ */
+ if (rev.pending.nr ||
+ rev.min_age != -1 || rev.max_age != -1 ||
+ 3 < rev.max_count)
+ usage(diff_files_usage);
+
+ /*
+ * "diff-files --base -p" should not combine merges because it
+ * was not asked to. "diff-files -c -p" should not densify
+ * (the user should ask with "diff-files --cc" explicitly).
+ */
+ if (rev.max_count == -1 &&
+ (rev.diffopt.output_format & DIFF_FORMAT_PATCH))
+ diff_merges_set_dense_combined_if_unset(&rev);
+
+ if (repo_read_index_preload(the_repository, &rev.diffopt.pathspec, 0) < 0) {
+ perror("repo_read_index_preload");
+ result = -1;
+ goto cleanup;
+ }
+ result = run_diff_files(&rev, options);
+ result = diff_result_code(&rev.diffopt, result);
+cleanup:
+ release_revisions(&rev);
+ return result;
+}