| /* |
| * "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" |
| #include "dir.h" |
| |
| static int read_directory_contents(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 (!is_dot_or_dotdot(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_contents(name1, &p1)) |
| return -1; |
| if (name2 && read_directory_contents(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; |
| 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], "--")) |
| i++; |
| else { |
| j = diff_opt_parse(&revs->diffopt, argv + i, argc - i); |
| if (j <= 0) |
| 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); |
| |
| 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)); |
| } |