diff options
Diffstat (limited to 'diff-no-index.c')
| -rw-r--r-- | diff-no-index.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/diff-no-index.c b/diff-no-index.c new file mode 100644 index 000000000..b60d3455d --- /dev/null +++ b/diff-no-index.c @@ -0,0 +1,264 @@ +/* + * "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(e->d_name, list); + + closedir(dir); + return 0; +} + +static int get_mode(const char *path, int *mode) +{ + struct stat st; + + if (!path || !strcmp(path, "/dev/null")) + *mode = 0; + else if (!strcmp(path, "-")) + *mode = create_ce_mode(0666); + else if (stat(path, &st)) + return error("Could not access '%s'", path); + else + *mode = st.st_mode; + return 0; +} + +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)) { + char buffer1[PATH_MAX], buffer2[PATH_MAX]; + struct string_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)) { + string_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].string, + p2.items[i2].string); + + if (comp > 0) + n1 = NULL; + else { + n1 = buffer1; + strncpy(buffer1 + len1, p1.items[i1++].string, + PATH_MAX - len1); + } + + if (comp < 0) + n2 = NULL; + else { + n2 = buffer2; + strncpy(buffer2 + len2, p2.items[i2++].string, + PATH_MAX - len2); + } + + ret = queue_diff(o, n1, n2); + } + string_list_clear(&p1, 0); + string_list_clear(&p2, 0); + + 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; + } + + 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 path_outside_repo(const char *path) +{ + /* + * We have already done setup_git_directory_gently() so we + * know we are inside a git work tree already. + */ + const char *work_tree; + size_t len; + + if (!is_absolute_path(path)) + return 0; + work_tree = get_git_work_tree(); + len = strlen(work_tree); + if (strncmp(path, work_tree, len) || + (path[len] != '\0' && path[len] != '/')) + return 1; + return 0; +} + +void diff_no_index(struct rev_info *revs, + int argc, const char **argv, + int nongit, const char *prefix) +{ + int i; + int no_index = 0; + unsigned options = 0; + + /* Were we asked to do --no-index explicitly? */ + for (i = 1; i < argc; i++) { + if (!strcmp(argv[i], "--")) + return; + if (!strcmp(argv[i], "--no-index")) + no_index = 1; + if (argv[i][0] != '-') + break; + } + + if (!no_index && !nongit) { + /* + * Inside a git repository, without --no-index. Only + * when a path outside the repository is given, + * e.g. "git diff /var/tmp/[12]", or "git diff + * Makefile /var/tmp/Makefile", allow it to be used as + * a colourful "diff" replacement. + */ + if ((argc != i + 2) || + (!path_outside_repo(argv[i]) && + !path_outside_repo(argv[i+1]))) + return; + } + if (argc != i + 2) + die("git diff %s takes two paths", + no_index ? "--no-index" : "[--no-index]"); + + /* + * If the user asked for our exit code then don't start a + * pager or we would end up reporting its exit code instead. + */ + if (!DIFF_OPT_TST(&revs->diffopt, EXIT_WITH_STATUS)) + setup_pager(); + + diff_setup(&revs->diffopt); + if (!revs->diffopt.output_format) + revs->diffopt.output_format = DIFF_FORMAT_PATCH; + for (i = 1; i < argc - 2; ) { + int j; + if (!strcmp(argv[i], "--no-index")) + i++; + else if (!strcmp(argv[1], "-q")) + options |= DIFF_SILENT_ON_REMOVED; + else { + j = diff_opt_parse(&revs->diffopt, argv + i, argc - i); + if (!j) + die("invalid diff option/value: %s", argv[i]); + i += j; + } + } + + if (prefix) { + int len = strlen(prefix); + + revs->diffopt.paths = xcalloc(2, sizeof(char*)); + for (i = 0; i < 2; i++) { + const char *p = argv[argc - 2 + i]; + /* + * stdin should be spelled as '-'; if you have + * path that is '-', spell it as ./-. + */ + p = (strcmp(p, "-") + ? xstrdup(prefix_filename(prefix, len, p)) + : p); + revs->diffopt.paths[i] = p; + } + } + else + revs->diffopt.paths = argv + argc - 2; + revs->diffopt.nr_paths = 2; + + DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS); + DIFF_OPT_SET(&revs->diffopt, NO_INDEX); + + revs->max_count = -2; + if (diff_setup_done(&revs->diffopt) < 0) + die("diff_setup_done failed"); + + if (queue_diff(&revs->diffopt, revs->diffopt.paths[0], + revs->diffopt.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(revs->diffopt.found_changes); +} |