[PATCH] Give show-files the ability to process exclusion pattern.
This can be used with the famous dontdiff file as follows to find out about uncommitted files just like dontdiff is used with the diff command: show-files --others --exclude-from=dontdiff and the exclude list can be reversed with the --ignore switch. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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show-files.c
105
show-files.c
@ -6,6 +6,7 @@
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include <dirent.h>
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#include <fnmatch.h>
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#include "cache.h"
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@ -17,6 +18,70 @@ static int show_stage = 0;
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static int show_unmerged = 0;
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static int line_terminator = '\n';
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static int nr_excludes;
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static const char **excludes;
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static int excludes_alloc;
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static void add_exclude(const char *string)
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{
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if (nr_excludes == excludes_alloc) {
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excludes_alloc = alloc_nr(excludes_alloc);
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excludes = realloc(excludes, excludes_alloc*sizeof(char *));
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}
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excludes[nr_excludes++] = string;
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}
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static void add_excludes_from_file(const char *fname)
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{
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int fd, i;
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long size;
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char *buf, *entry;
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fd = open(fname, O_RDONLY);
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if (fd < 0)
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goto err;
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size = lseek(fd, 0, SEEK_END);
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if (size < 0)
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goto err;
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lseek(fd, 0, SEEK_SET);
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if (size == 0) {
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close(fd);
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return;
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}
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buf = xmalloc(size);
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if (read(fd, buf, size) != size)
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goto err;
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close(fd);
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entry = buf;
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for (i = 0; i < size; i++) {
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if (buf[i] == '\n') {
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if (entry != buf + i) {
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buf[i] = 0;
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add_exclude(entry);
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}
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entry = buf + i + 1;
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}
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}
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return;
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err: perror(fname);
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exit(1);
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}
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static int excluded(const char *pathname)
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{
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int i;
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if (nr_excludes) {
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const char *basename = strrchr(pathname, '/');
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basename = (basename) ? basename+1 : pathname;
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for (i = 0; i < nr_excludes; i++)
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if (fnmatch(excludes[i], basename, 0) == 0)
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return 1;
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}
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return 0;
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}
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static const char **dir;
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static int nr_dir;
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static int dir_alloc;
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@ -59,6 +124,8 @@ static void read_directory(const char *path, const char *base, int baselen)
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if (de->d_name[0] == '.')
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continue;
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if (excluded(de->d_name) != show_ignored)
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continue;
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len = strlen(de->d_name);
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memcpy(fullname + baselen, de->d_name, len+1);
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@ -101,17 +168,17 @@ static void show_files(void)
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int i;
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/* For cached/deleted files we don't need to even do the readdir */
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if (show_others | show_ignored) {
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if (show_others) {
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read_directory(".", "", 0);
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qsort(dir, nr_dir, sizeof(char *), cmp_name);
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}
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if (show_others) {
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for (i = 0; i < nr_dir; i++)
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printf("%s%c", dir[i], line_terminator);
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}
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if (show_cached | show_stage) {
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for (i = 0; i < active_nr; i++) {
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struct cache_entry *ce = active_cache[i];
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if (excluded(ce->name) != show_ignored)
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continue;
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if (show_unmerged && !ce_stage(ce))
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continue;
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if (!show_stage)
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@ -130,14 +197,13 @@ static void show_files(void)
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for (i = 0; i < active_nr; i++) {
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struct cache_entry *ce = active_cache[i];
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struct stat st;
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if (excluded(ce->name) != show_ignored)
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continue;
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if (!stat(ce->name, &st))
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continue;
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printf("%s%c", ce->name, line_terminator);
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}
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}
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if (show_ignored) {
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/* We don't have any "ignore" list yet */
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}
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}
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int main(int argc, char **argv)
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@ -179,11 +245,34 @@ int main(int argc, char **argv)
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continue;
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}
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usage("show-files [-z] (--[cached|deleted|others|ignored|stage])*");
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if (!strcmp(arg, "-x") && i+1 < argc) {
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add_exclude(argv[++i]);
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continue;
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}
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if (!strncmp(arg, "--exclude=", 10)) {
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add_exclude(arg+10);
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continue;
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}
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if (!strcmp(arg, "-X") && i+1 < argc) {
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add_excludes_from_file(argv[++i]);
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continue;
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}
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if (!strncmp(arg, "--exclude-from=", 15)) {
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add_excludes_from_file(arg+15);
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continue;
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}
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usage("show-files [-z] (--[cached|deleted|others|stage])* "
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"[ --ignored [--exclude=<pattern>] [--exclude-from=<file>) ]");
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}
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if (show_ignored && !nr_excludes) {
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fprintf(stderr, "%s: --ignored needs some exclude pattern\n", argv[0]);
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exit(1);
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}
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/* With no flags, we default to showing the cached files */
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if (!(show_stage | show_deleted | show_others | show_ignored | show_unmerged))
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if (!(show_stage | show_deleted | show_others | show_unmerged))
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show_cached = 1;
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read_cache();
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