diff options
Diffstat (limited to 'diff-lib.c')
| -rw-r--r-- | diff-lib.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/diff-lib.c b/diff-lib.c index 556d5345b..a9b5149d1 100644 --- a/diff-lib.c +++ b/diff-lib.c @@ -8,11 +8,218 @@ #include "diffcore.h" #include "revision.h" #include "cache-tree.h" +#include "path-list.h" /* * diff-files */ +static int read_directory(const char *path, struct path_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)) + path_list_insert(xstrdup(e->d_name), list); + + closedir(dir); + return 0; +} + +static int queue_diff(struct diff_options *o, + const char *name1, const char *name2) +{ + struct stat st; + int mode1 = 0, mode2 = 0; + + if (name1) { + if (stat(name1, &st)) + return error("Could not access '%s'", name1); + mode1 = st.st_mode; + } + if (name2) { + if (stat(name2, &st)) + return error("Could not access '%s'", name1); + mode2 = st.st_mode; + } + + 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)) { + char buffer1[PATH_MAX], buffer2[PATH_MAX]; + struct path_list p1 = {NULL, 0, 0, 1}, p2 = {NULL, 0, 0, 1}; + int len1 = 0, len2 = 0, i1, i2, ret = 0; + + if (name1 && read_directory(name1, &p1)) + return -1; + if (name2 && read_directory(name2, &p2)) { + path_list_clear(&p1, 0); + return -1; + } + + if (name1) { + len1 = strlen(name1); + if (len1 > 0 && name1[len1 - 1] == '/') + len1--; + memcpy(buffer1, name1, len1); + buffer1[len1++] = '/'; + } + + if (name2) { + len2 = strlen(name2); + if (len2 > 0 && name2[len2 - 1] == '/') + len2--; + memcpy(buffer2, name2, len2); + buffer2[len2++] = '/'; + } + + for (i1 = i2 = 0; !ret && (i1 < p1.nr || i2 < p2.nr); ) { + const char *n1, *n2; + int comp; + + if (i1 == p1.nr) + comp = 1; + else if (i2 == p2.nr) + comp = -1; + else + comp = strcmp(p1.items[i1].path, + p2.items[i2].path); + + if (comp > 0) + n1 = NULL; + else { + n1 = buffer1; + strncpy(buffer1 + len1, p1.items[i1++].path, + PATH_MAX - len1); + } + + if (comp < 0) + n2 = NULL; + else { + n2 = buffer2; + strncpy(buffer2 + len2, p2.items[i2++].path, + PATH_MAX - len2); + } + + ret = queue_diff(o, n1, n2); + } + path_list_clear(&p1, 0); + path_list_clear(&p2, 0); + + return ret; + } else { + struct diff_filespec *d1, *d2; + + if (o->reverse_diff) { + unsigned tmp; + const char *tmp_c; + tmp = mode1; mode1 = mode2; mode2 = tmp; + tmp_c = name1; name1 = name2; name2 = tmp_c; + } + + if (!name1) + name1 = "/dev/null"; + if (!name2) + name2 = "/dev/null"; + d1 = alloc_filespec(name1); + d2 = alloc_filespec(name2); + fill_filespec(d1, null_sha1, mode1); + fill_filespec(d2, null_sha1, mode2); + + diff_queue(&diff_queued_diff, d1, d2); + return 0; + } +} + +static int is_in_index(const char *path) +{ + int len = strlen(path); + int pos = cache_name_pos(path, len); + char c; + + if (pos < 0) + return 0; + if (strncmp(active_cache[pos]->name, path, len)) + return 0; + c = active_cache[pos]->name[len]; + return c == '\0' || c == '/'; +} + +static int handle_diff_files_args(struct rev_info *revs, + int argc, const char **argv, int *silent) +{ + *silent = 0; + + /* revs->max_count == -2 means --no-index */ + while (1 < argc && argv[1][0] == '-') { + if (!strcmp(argv[1], "--base")) + revs->max_count = 1; + else if (!strcmp(argv[1], "--ours")) + revs->max_count = 2; + else if (!strcmp(argv[1], "--theirs")) + revs->max_count = 3; + else if (!strcmp(argv[1], "-n") || + !strcmp(argv[1], "--no-index")) + revs->max_count = -2; + else if (!strcmp(argv[1], "-q")) + *silent = 1; + else + return error("invalid option: %s", argv[1]); + argv++; argc--; + } + + if (revs->max_count == -1 && revs->diffopt.nr_paths == 2) { + /* + * If two files are specified, and at least one is untracked, + * default to no-index. + */ + read_cache(); + if (!is_in_index(revs->diffopt.paths[0]) || + !is_in_index(revs->diffopt.paths[1])) + revs->max_count = -2; + } + + /* + * Make sure there are NO revision (i.e. pending object) parameter, + * rev.max_count is reasonable (0 <= n <= 3), + * there is no other revision filtering parameters. + */ + if (revs->pending.nr || revs->max_count > 3 || + revs->min_age != -1 || revs->max_age != -1) + return error("no revision allowed with diff-files"); + + if (revs->max_count == -1 && + (revs->diffopt.output_format & DIFF_FORMAT_PATCH)) + revs->combine_merges = revs->dense_combined_merges = 1; + + return 0; +} + +int run_diff_files_cmd(struct rev_info *revs, int argc, const char **argv) +{ + int silent_on_removed; + + if (handle_diff_files_args(revs, argc, argv, &silent_on_removed)) + return -1; + + if (revs->max_count == -2) { + if (revs->diffopt.nr_paths != 2) + return error("need two files/directories with --no-index"); + queue_diff(&revs->diffopt, revs->diffopt.paths[0], + revs->diffopt.paths[1]); + diffcore_std(&revs->diffopt); + diff_flush(&revs->diffopt); + return 0; + } + + return run_diff_files(revs, silent_on_removed); +} + int run_diff_files(struct rev_info *revs, int silent_on_removed) { int entries, i; |