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diff --git a/tree-diff.c b/tree-diff.c
index 852498eb49fe0cba5e1cd21661288e8321a4b20e..e1e2e6c6ce3c4effffb26e9aed7c6bdd2b00a5ae 100644 (file)
--- a/tree-diff.c
+++ b/tree-diff.c
*/
#include "cache.h"
#include "diff.h"
+#include "diffcore.h"
#include "tree.h"
static char *malloc_base(const char *base, int baselen, const char *path, int pathlen)
show_entry(opt, "+", t2, base, baselen);
return 1;
}
- if (!opt->find_copies_harder && !hashcmp(sha1, sha2) && mode1 == mode2)
+ if (!DIFF_OPT_TST(opt, FIND_COPIES_HARDER) && !hashcmp(sha1, sha2) && mode1 == mode2)
return 0;
/*
return 0;
}
- if (opt->recursive && S_ISDIR(mode1)) {
+ if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode1)) {
int retval;
char *newbase = malloc_base(base, baselen, path1, pathlen1);
- if (opt->tree_in_recursive)
+ if (DIFF_OPT_TST(opt, TREE_IN_RECURSIVE))
opt->change(opt, mode1, mode2,
sha1, sha2, base, path1);
retval = diff_tree_sha1(sha1, sha2, newbase, opt);
@@ -205,7 +206,7 @@ static void show_entry(struct diff_options *opt, const char *prefix, struct tree
const char *path;
const unsigned char *sha1 = tree_entry_extract(desc, &path, &mode);
- if (opt->recursive && S_ISDIR(mode)) {
+ if (DIFF_OPT_TST(opt, RECURSIVE) && S_ISDIR(mode)) {
enum object_type type;
int pathlen = tree_entry_len(path, sha1);
char *newbase = malloc_base(base, baselen, path, pathlen);
@@ -256,7 +257,7 @@ int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, stru
int baselen = strlen(base);
for (;;) {
- if (opt->quiet && opt->has_changes)
+ if (DIFF_OPT_TST(opt, QUIET) && DIFF_OPT_TST(opt, HAS_CHANGES))
break;
if (opt->nr_paths) {
skip_uninteresting(t1, base, baselen, opt);
@@ -290,6 +291,81 @@ int diff_tree(struct tree_desc *t1, struct tree_desc *t2, const char *base, stru
return 0;
}
+/*
+ * Does it look like the resulting diff might be due to a rename?
+ * - single entry
+ * - not a valid previous file
+ */
+static inline int diff_might_be_rename(void)
+{
+ return diff_queued_diff.nr == 1 &&
+ !DIFF_FILE_VALID(diff_queued_diff.queue[0]->one);
+}
+
+static void try_to_follow_renames(struct tree_desc *t1, struct tree_desc *t2, const char *base, struct diff_options *opt)
+{
+ struct diff_options diff_opts;
+ struct diff_queue_struct *q = &diff_queued_diff;
+ struct diff_filepair *choice;
+ const char *paths[1];
+ int i;
+
+ /* Remove the file creation entry from the diff queue, and remember it */
+ choice = q->queue[0];
+ q->nr = 0;
+
+ diff_setup(&diff_opts);
+ DIFF_OPT_SET(&diff_opts, RECURSIVE);
+ diff_opts.detect_rename = DIFF_DETECT_RENAME;
+ diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
+ diff_opts.single_follow = opt->paths[0];
+ diff_opts.break_opt = opt->break_opt;
+ paths[0] = NULL;
+ diff_tree_setup_paths(paths, &diff_opts);
+ if (diff_setup_done(&diff_opts) < 0)
+ die("unable to set up diff options to follow renames");
+ diff_tree(t1, t2, base, &diff_opts);
+ diffcore_std(&diff_opts);
+ diff_tree_release_paths(&diff_opts);
+
+ /* Go through the new set of filepairing, and see if we find a more interesting one */
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+
+ /*
+ * Found a source? Not only do we use that for the new
+ * diff_queued_diff, we will also use that as the path in
+ * the future!
+ */
+ if ((p->status == 'R' || p->status == 'C') && !strcmp(p->two->path, opt->paths[0])) {
+ /* Switch the file-pairs around */
+ q->queue[i] = choice;
+ choice = p;
+
+ /* Update the path we use from now on.. */
+ diff_tree_release_paths(opt);
+ opt->paths[0] = xstrdup(p->one->path);
+ diff_tree_setup_paths(opt->paths, opt);
+ break;
+ }
+ }
+
+ /*
+ * Then, discard all the non-relevane file pairs...
+ */
+ for (i = 0; i < q->nr; i++) {
+ struct diff_filepair *p = q->queue[i];
+ diff_free_filepair(p);
+ }
+
+ /*
+ * .. and re-instate the one we want (which might be either the
+ * original one, or the rename/copy we found)
+ */
+ q->queue[0] = choice;
+ q->nr = 1;
+}
+
int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const char *base, struct diff_options *opt)
{
void *tree1, *tree2;
@@ -306,6 +382,11 @@ int diff_tree_sha1(const unsigned char *old, const unsigned char *new, const cha
init_tree_desc(&t1, tree1, size1);
init_tree_desc(&t2, tree2, size2);
retval = diff_tree(&t1, &t2, base, opt);
+ if (DIFF_OPT_TST(opt, FOLLOW_RENAMES) && diff_might_be_rename()) {
+ init_tree_desc(&t1, tree1, size1);
+ init_tree_desc(&t2, tree2, size2);
+ try_to_follow_renames(&t1, &t2, base, opt);
+ }
free(tree1);
free(tree2);
return retval;