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diff-no-index.c
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/* * "diff --no-index" support * Copyright (c) 2007 by Johannes Schindelin * Copyright (c) 2008 by Junio C Hamano */ #include "cache.h" #include "color.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" #include "string-list.h" static int read_directory(const char *path, struct string_list *list) { DIR *dir; struct dirent *e; if (!(dir = opendir(path))) return error("Could not open directory %s", path); while ((e = readdir(dir))) if (strcmp(".", e->d_name) && strcmp("..", e->d_name)) string_list_insert(list, e->d_name); closedir(dir); return 0; } /* * This should be "(standard input)" or something, but it will * probably expose many more breakages in the way no-index code * is bolted onto the diff callchain. */ static const char file_from_standard_input[] = "-"; static int get_mode(const char *path, int *mode) { struct stat st; if (!path || !strcmp(path, "/dev/null")) *mode = 0; #ifdef GIT_WINDOWS_NATIVE else if (!strcasecmp(path, "nul")) *mode = 0; #endif else if (path == file_from_standard_input) *mode = create_ce_mode(0666); else if (lstat(path, &st)) return error("Could not access '%s'", path); else *mode = st.st_mode; return 0; } static int populate_from_stdin(struct diff_filespec *s) { struct strbuf buf = STRBUF_INIT; size_t size = 0; if (strbuf_read(&buf, 0, 0) < 0) return error("error while reading from stdin %s", strerror(errno)); s->should_munmap = 0; s->data = strbuf_detach(&buf, &size); s->size = size; s->should_free = 1; s->is_stdin = 1; return 0; } static struct diff_filespec *noindex_filespec(const char *name, int mode) { struct diff_filespec *s; if (!name) name = "/dev/null"; s = alloc_filespec(name); fill_filespec(s, null_sha1, 0, mode); if (name == file_from_standard_input) populate_from_stdin(s); return s; } static int queue_diff(struct diff_options *o, const char *name1, const char *name2) { int mode1 = 0, mode2 = 0; if (get_mode(name1, &mode1) || get_mode(name2, &mode2)) return -1; if (mode1 && mode2 && S_ISDIR(mode1) != S_ISDIR(mode2)) return error("file/directory conflict: %s, %s", name1, name2); if (S_ISDIR(mode1) || S_ISDIR(mode2)) { struct strbuf buffer1 = STRBUF_INIT; struct strbuf buffer2 = STRBUF_INIT; struct string_list p1 = STRING_LIST_INIT_DUP; struct string_list p2 = STRING_LIST_INIT_DUP; int i1, i2, ret = 0; size_t len1 = 0, len2 = 0; if (name1 && read_directory(name1, &p1)) return -1; if (name2 && read_directory(name2, &p2)) { string_list_clear(&p1, 0); return -1; } if (name1) { strbuf_addstr(&buffer1, name1); if (buffer1.len && buffer1.buf[buffer1.len - 1] != '/') strbuf_addch(&buffer1, '/'); len1 = buffer1.len; } if (name2) { strbuf_addstr(&buffer2, name2); if (buffer2.len && buffer2.buf[buffer2.len - 1] != '/') strbuf_addch(&buffer2, '/'); len2 = buffer2.len; } for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) { const char *n1, *n2; int comp; strbuf_setlen(&buffer1, len1); strbuf_setlen(&buffer2, len2); if (i1 == p1.nr) comp = 1; else if (i2 == p2.nr) comp = -1; else comp = strcmp(p1.items[i1].string, p2.items[i2].string); if (comp > 0) n1 = NULL; else { strbuf_addstr(&buffer1, p1.items[i1++].string); n1 = buffer1.buf; } if (comp < 0) n2 = NULL; else { strbuf_addstr(&buffer2, p2.items[i2++].string); n2 = buffer2.buf; } ret = queue_diff(o, n1, n2); } string_list_clear(&p1, 0); string_list_clear(&p2, 0); strbuf_release(&buffer1); strbuf_release(&buffer2); return ret; } else { struct diff_filespec *d1, *d2; if (DIFF_OPT_TST(o, REVERSE_DIFF)) { unsigned tmp; const char *tmp_c; tmp = mode1; mode1 = mode2; mode2 = tmp; tmp_c = name1; name1 = name2; name2 = tmp_c; } d1 = noindex_filespec(name1, mode1); d2 = noindex_filespec(name2, mode2); diff_queue(&diff_queued_diff, d1, d2); return 0; } } void diff_no_index(struct rev_info *revs, int argc, const char **argv, const char *prefix) { int i, prefixlen; unsigned deprecated_show_diff_q_option_used = 0; const char *paths[2]; diff_setup(&revs->diffopt); for (i = 1; i < argc - 2; ) { int j; if (!strcmp(argv[i], "--no-index")) i++; else if (!strcmp(argv[i], "-q")) { deprecated_show_diff_q_option_used = 1; i++; } else if (!strcmp(argv[i], "--")) i++; else { j = diff_opt_parse(&revs->diffopt, argv + i, argc - i); if (!j) die("invalid diff option/value: %s", argv[i]); i += j; } } prefixlen = prefix ? strlen(prefix) : 0; for (i = 0; i < 2; i++) { const char *p = argv[argc - 2 + i]; if (!strcmp(p, "-")) /* * stdin should be spelled as "-"; if you have * path that is "-", spell it as "./-". */ p = file_from_standard_input; else if (prefixlen) p = xstrdup(prefix_filename(prefix, prefixlen, p)); paths[i] = p; } revs->diffopt.skip_stat_unmatch = 1; if (!revs->diffopt.output_format) revs->diffopt.output_format = DIFF_FORMAT_PATCH; DIFF_OPT_SET(&revs->diffopt, NO_INDEX); revs->max_count = -2; diff_setup_done(&revs->diffopt); if (deprecated_show_diff_q_option_used) handle_deprecated_show_diff_q(&revs->diffopt); setup_diff_pager(&revs->diffopt); DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS); if (queue_diff(&revs->diffopt, paths[0], paths[1])) exit(1); diff_set_mnemonic_prefix(&revs->diffopt, "1/", "2/"); diffcore_std(&revs->diffopt); diff_flush(&revs->diffopt); /* * The return code for --no-index imitates diff(1): * 0 = no changes, 1 = changes, else error */ exit(diff_result_code(&revs->diffopt, 0)); }
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