#include "cache.h" #include "config.h" #include "diff.h" #include "commit.h" #include "log-tree.h" #include "builtin.h" #include "submodule.h" static struct rev_info log_tree_opt; static int diff_tree_commit_oid(const struct object_id *oid) { struct commit *commit = lookup_commit_reference(oid); if (!commit) return -1; return log_tree_commit(&log_tree_opt, commit); } /* Diff one or more commits. */ static int stdin_diff_commit(struct commit *commit, const char *p) { struct object_id oid; struct commit_list **pptr = NULL; /* Graft the fake parents locally to the commit */ while (isspace(*p++) && !parse_oid_hex(p, &oid, &p)) { struct commit *parent = lookup_commit(&oid); if (!pptr) { /* Free the real parent list */ free_commit_list(commit->parents); commit->parents = NULL; pptr = &(commit->parents); } if (parent) { pptr = &commit_list_insert(parent, pptr)->next; } } return log_tree_commit(&log_tree_opt, commit); } /* Diff two trees. */ static int stdin_diff_trees(struct tree *tree1, const char *p) { struct object_id oid; struct tree *tree2; if (!isspace(*p++) || parse_oid_hex(p, &oid, &p) || *p) return error("Need exactly two trees, separated by a space"); tree2 = lookup_tree(&oid); if (!tree2 || parse_tree(tree2)) return -1; printf("%s %s\n", oid_to_hex(&tree1->object.oid), oid_to_hex(&tree2->object.oid)); diff_tree_oid(&tree1->object.oid, &tree2->object.oid, "", &log_tree_opt.diffopt); log_tree_diff_flush(&log_tree_opt); return 0; } static int diff_tree_stdin(char *line) { int len = strlen(line); struct object_id oid; struct object *obj; const char *p; if (!len || line[len-1] != '\n') return -1; line[len-1] = 0; if (parse_oid_hex(line, &oid, &p)) return -1; obj = parse_object(&oid); if (!obj) return -1; if (obj->type == OBJ_COMMIT) return stdin_diff_commit((struct commit *)obj, p); if (obj->type == OBJ_TREE) return stdin_diff_trees((struct tree *)obj, p); error("Object %s is a %s, not a commit or tree", oid_to_hex(&oid), type_name(obj->type)); return -1; } static const char diff_tree_usage[] = "git diff-tree [--stdin] [-m] [-c] [--cc] [-s] [-v] [--pretty] [-t] [-r] [--root] " "[<common-diff-options>] <tree-ish> [<tree-ish>] [<path>...]\n" " -r diff recursively\n" " --root include the initial commit as diff against /dev/null\n" COMMON_DIFF_OPTIONS_HELP; static void diff_tree_tweak_rev(struct rev_info *rev, struct setup_revision_opt *opt) { if (!rev->diffopt.output_format) { if (rev->dense_combined_merges) rev->diffopt.output_format = DIFF_FORMAT_PATCH; else rev->diffopt.output_format = DIFF_FORMAT_RAW; } } int cmd_diff_tree(int argc, const char **argv, const char *prefix) { char line[1000]; struct object *tree1, *tree2; static struct rev_info *opt = &log_tree_opt; struct setup_revision_opt s_r_opt; int read_stdin = 0; if (argc == 2 && !strcmp(argv[1], "-h")) usage(diff_tree_usage); git_config(git_diff_basic_config, NULL); /* no "diff" UI options */ init_revisions(opt, prefix); if (read_cache() < 0) die(_("index file corrupt")); opt->abbrev = 0; opt->diff = 1; opt->disable_stdin = 1; memset(&s_r_opt, 0, sizeof(s_r_opt)); s_r_opt.tweak = diff_tree_tweak_rev; precompose_argv(argc, argv); argc = setup_revisions(argc, argv, opt, &s_r_opt); while (--argc > 0) { const char *arg = *++argv; if (!strcmp(arg, "--stdin")) { read_stdin = 1; continue; } usage(diff_tree_usage); } /* * NOTE! We expect "a..b" to expand to "^a b" but it is * perfectly valid for revision range parser to yield "b ^a", * which means the same thing. If we get the latter, i.e. the * second one is marked UNINTERESTING, we recover the original * order the user gave, i.e. "a..b", by swapping the trees. */ switch (opt->pending.nr) { case 0: if (!read_stdin) usage(diff_tree_usage); break; case 1: tree1 = opt->pending.objects[0].item; diff_tree_commit_oid(&tree1->oid); break; case 2: tree1 = opt->pending.objects[0].item; tree2 = opt->pending.objects[1].item; if (tree2->flags & UNINTERESTING) { SWAP(tree2, tree1); } diff_tree_oid(&tree1->oid, &tree2->oid, "", &opt->diffopt); log_tree_diff_flush(opt); break; } if (read_stdin) { int saved_nrl = 0; int saved_dcctc = 0; if (opt->diffopt.detect_rename) opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE | DIFF_SETUP_USE_CACHE); while (fgets(line, sizeof(line), stdin)) { struct object_id oid; if (get_oid_hex(line, &oid)) { fputs(line, stdout); fflush(stdout); } else { diff_tree_stdin(line); if (saved_nrl < opt->diffopt.needed_rename_limit) saved_nrl = opt->diffopt.needed_rename_limit; if (opt->diffopt.degraded_cc_to_c) saved_dcctc = 1; } } opt->diffopt.degraded_cc_to_c = saved_dcctc; opt->diffopt.needed_rename_limit = saved_nrl; } return diff_result_code(&opt->diffopt, 0); }