diff options
Diffstat (limited to 'builtin-diff.c')
-rw-r--r-- | builtin-diff.c | 329 |
1 files changed, 0 insertions, 329 deletions
diff --git a/builtin-diff.c b/builtin-diff.c deleted file mode 100644 index 4efbb8237b..0000000000 --- a/builtin-diff.c +++ /dev/null @@ -1,329 +0,0 @@ -/* - * Builtin "git diff" - * - * Copyright (c) 2006 Junio C Hamano - */ -#include "cache.h" -#include "commit.h" -#include "blob.h" -#include "tag.h" -#include "diff.h" -#include "diffcore.h" -#include "revision.h" -#include "log-tree.h" -#include "builtin.h" - -/* NEEDSWORK: struct object has place for name but we _do_ - * know mode when we extracted the blob out of a tree, which - * we currently lose. - */ -struct blobinfo { - unsigned char sha1[20]; - const char *name; -}; - -static const char builtin_diff_usage[] = -"git-diff <options> <rev>{0,2} -- <path>*"; - -static void stuff_change(struct diff_options *opt, - unsigned old_mode, unsigned new_mode, - const unsigned char *old_sha1, - const unsigned char *new_sha1, - const char *old_name, - const char *new_name) -{ - struct diff_filespec *one, *two; - - if (!is_null_sha1(old_sha1) && !is_null_sha1(new_sha1) && - !hashcmp(old_sha1, new_sha1)) - return; - - if (opt->reverse_diff) { - unsigned tmp; - const unsigned char *tmp_u; - const char *tmp_c; - tmp = old_mode; old_mode = new_mode; new_mode = tmp; - tmp_u = old_sha1; old_sha1 = new_sha1; new_sha1 = tmp_u; - tmp_c = old_name; old_name = new_name; new_name = tmp_c; - } - one = alloc_filespec(old_name); - two = alloc_filespec(new_name); - fill_filespec(one, old_sha1, old_mode); - fill_filespec(two, new_sha1, new_mode); - - /* NEEDSWORK: shouldn't this part of diffopt??? */ - diff_queue(&diff_queued_diff, one, two); -} - -static int builtin_diff_b_f(struct rev_info *revs, - int argc, const char **argv, - struct blobinfo *blob, - const char *path) -{ - /* Blob vs file in the working tree*/ - struct stat st; - - if (argc > 1) - usage(builtin_diff_usage); - - if (lstat(path, &st)) - die("'%s': %s", path, strerror(errno)); - if (!(S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))) - die("'%s': not a regular file or symlink", path); - stuff_change(&revs->diffopt, - canon_mode(st.st_mode), canon_mode(st.st_mode), - blob[0].sha1, null_sha1, - path, path); - diffcore_std(&revs->diffopt); - diff_flush(&revs->diffopt); - return 0; -} - -static int builtin_diff_blobs(struct rev_info *revs, - int argc, const char **argv, - struct blobinfo *blob) -{ - unsigned mode = canon_mode(S_IFREG | 0644); - - if (argc > 1) - usage(builtin_diff_usage); - - stuff_change(&revs->diffopt, - mode, mode, - blob[0].sha1, blob[1].sha1, - blob[0].name, blob[1].name); - diffcore_std(&revs->diffopt); - diff_flush(&revs->diffopt); - return 0; -} - -static int builtin_diff_index(struct rev_info *revs, - int argc, const char **argv) -{ - int cached = 0; - while (1 < argc) { - const char *arg = argv[1]; - if (!strcmp(arg, "--cached")) - cached = 1; - else - usage(builtin_diff_usage); - argv++; argc--; - } - /* - * Make sure there is one revision (i.e. pending object), - * and there is no revision filtering parameters. - */ - if (revs->pending.nr != 1 || - revs->max_count != -1 || revs->min_age != -1 || - revs->max_age != -1) - usage(builtin_diff_usage); - if (read_cache() < 0) { - perror("read_cache"); - return -1; - } - return run_diff_index(revs, cached); -} - -static int builtin_diff_tree(struct rev_info *revs, - int argc, const char **argv, - struct object_array_entry *ent) -{ - const unsigned char *(sha1[2]); - int swap = 0; - - if (argc > 1) - usage(builtin_diff_usage); - - /* We saw two trees, ent[0] and ent[1]. - * if ent[1] is uninteresting, they are swapped - */ - if (ent[1].item->flags & UNINTERESTING) - swap = 1; - sha1[swap] = ent[0].item->sha1; - sha1[1-swap] = ent[1].item->sha1; - diff_tree_sha1(sha1[0], sha1[1], "", &revs->diffopt); - log_tree_diff_flush(revs); - return 0; -} - -static int builtin_diff_combined(struct rev_info *revs, - int argc, const char **argv, - struct object_array_entry *ent, - int ents) -{ - const unsigned char (*parent)[20]; - int i; - - if (argc > 1) - usage(builtin_diff_usage); - - if (!revs->dense_combined_merges && !revs->combine_merges) - revs->dense_combined_merges = revs->combine_merges = 1; - parent = xmalloc(ents * sizeof(*parent)); - /* Again, the revs are all reverse */ - for (i = 0; i < ents; i++) - hashcpy((unsigned char *)(parent + i), - ent[ents - 1 - i].item->sha1); - diff_tree_combined(parent[0], parent + 1, ents - 1, - revs->dense_combined_merges, revs); - return 0; -} - -void add_head(struct rev_info *revs) -{ - unsigned char sha1[20]; - struct object *obj; - if (get_sha1("HEAD", sha1)) - return; - obj = parse_object(sha1); - if (!obj) - return; - add_pending_object(revs, obj, "HEAD"); -} - -int cmd_diff(int argc, const char **argv, const char *prefix) -{ - int i; - struct rev_info rev; - struct object_array_entry ent[100]; - int ents = 0, blobs = 0, paths = 0; - const char *path = NULL; - struct blobinfo blob[2]; - int nongit = 0; - - /* - * We could get N tree-ish in the rev.pending_objects list. - * Also there could be M blobs there, and P pathspecs. - * - * N=0, M=0: - * cache vs files (diff-files) - * N=0, M=2: - * compare two random blobs. P must be zero. - * N=0, M=1, P=1: - * compare a blob with a working tree file. - * - * N=1, M=0: - * tree vs cache (diff-index --cached) - * - * N=2, M=0: - * tree vs tree (diff-tree) - * - * Other cases are errors. - */ - - prefix = setup_git_directory_gently(&nongit); - git_config(git_diff_ui_config); - init_revisions(&rev, prefix); - - if (!setup_diff_no_index(&rev, argc, argv, nongit, prefix)) - argc = 0; - else - argc = setup_revisions(argc, argv, &rev, NULL); - if (!rev.diffopt.output_format) { - rev.diffopt.output_format = DIFF_FORMAT_PATCH; - if (diff_setup_done(&rev.diffopt) < 0) - die("diff_setup_done failed"); - } - - /* Do we have --cached and not have a pending object, then - * default to HEAD by hand. Eek. - */ - if (!rev.pending.nr) { - int i; - for (i = 1; i < argc; i++) { - const char *arg = argv[i]; - if (!strcmp(arg, "--")) - break; - else if (!strcmp(arg, "--cached")) { - add_head(&rev); - if (!rev.pending.nr) - die("No HEAD commit to compare with (yet)"); - break; - } - } - } - - for (i = 0; i < rev.pending.nr; i++) { - struct object_array_entry *list = rev.pending.objects+i; - struct object *obj = list->item; - const char *name = list->name; - int flags = (obj->flags & UNINTERESTING); - if (!obj->parsed) - obj = parse_object(obj->sha1); - obj = deref_tag(obj, NULL, 0); - if (!obj) - die("invalid object '%s' given.", name); - if (obj->type == OBJ_COMMIT) - obj = &((struct commit *)obj)->tree->object; - if (obj->type == OBJ_TREE) { - if (ARRAY_SIZE(ent) <= ents) - die("more than %d trees given: '%s'", - (int) ARRAY_SIZE(ent), name); - obj->flags |= flags; - ent[ents].item = obj; - ent[ents].name = name; - ents++; - continue; - } - if (obj->type == OBJ_BLOB) { - if (2 <= blobs) - die("more than two blobs given: '%s'", name); - hashcpy(blob[blobs].sha1, obj->sha1); - blob[blobs].name = name; - blobs++; - continue; - - } - die("unhandled object '%s' given.", name); - } - if (rev.prune_data) { - const char **pathspec = rev.prune_data; - while (*pathspec) { - if (!path) - path = *pathspec; - paths++; - pathspec++; - } - } - - /* - * Now, do the arguments look reasonable? - */ - if (!ents) { - switch (blobs) { - case 0: - return run_diff_files_cmd(&rev, argc, argv); - break; - case 1: - if (paths != 1) - usage(builtin_diff_usage); - return builtin_diff_b_f(&rev, argc, argv, blob, path); - break; - case 2: - if (paths) - usage(builtin_diff_usage); - return builtin_diff_blobs(&rev, argc, argv, blob); - break; - default: - usage(builtin_diff_usage); - } - } - else if (blobs) - usage(builtin_diff_usage); - else if (ents == 1) - return builtin_diff_index(&rev, argc, argv); - else if (ents == 2) - return builtin_diff_tree(&rev, argc, argv, ent); - else if ((ents == 3) && (ent[0].item->flags & UNINTERESTING)) { - /* diff A...B where there is one sane merge base between - * A and B. We have ent[0] == merge-base, ent[1] == A, - * and ent[2] == B. Show diff between the base and B. - */ - ent[1] = ent[2]; - return builtin_diff_tree(&rev, argc, argv, ent); - } - else - return builtin_diff_combined(&rev, argc, argv, - ent, ents); - usage(builtin_diff_usage); -} |