Rename "show-files" to "ls-files"

As suggested by Nicolas Pitre

1 files changed, 260 insertions, 0 deletions

diff --git a/ls-files.c b/ls-files.c
new file mode 100644
index 000000000..c63c7aa4b
--- /dev/null
+++ b/ls-files.c
@@ -0,0 +1,260 @@
+/*
+ * This merges the file listing in the directory cache index
+ * with the actual working directory list, and shows different
+ * combinations of the two.
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include <dirent.h>
+#include <fnmatch.h>
+
+#include "cache.h"
+
+static int show_deleted = 0;
+static int show_cached = 0;
+static int show_others = 0;
+static int show_ignored = 0;
+static int show_stage = 0;
+static int show_unmerged = 0;
+static int line_terminator = '\n';
+
+static int nr_excludes;
+static const char **excludes;
+static int excludes_alloc;
+
+static void add_exclude(const char *string)
+{
+	if (nr_excludes == excludes_alloc) {
+		excludes_alloc = alloc_nr(excludes_alloc);
+		excludes = realloc(excludes, excludes_alloc*sizeof(char *));
+	}
+	excludes[nr_excludes++] = string;
+}
+
+static void add_excludes_from_file(const char *fname)
+{
+	int fd, i;
+	long size;
+	char *buf, *entry;
+
+	fd = open(fname, O_RDONLY);
+	if (fd < 0)
+		goto err;
+	size = lseek(fd, 0, SEEK_END);
+	if (size < 0)
+		goto err;
+	lseek(fd, 0, SEEK_SET);
+	if (size == 0) {
+		close(fd);
+		return;
+	}
+	buf = xmalloc(size);
+	if (read(fd, buf, size) != size)
+		goto err;
+	close(fd);
+
+	entry = buf;
+	for (i = 0; i < size; i++) {
+		if (buf[i] == '\n') {
+			if (entry != buf + i) {
+				buf[i] = 0;
+				add_exclude(entry);
+			}
+			entry = buf + i + 1;
+		}
+	}
+	return;
+
+err:	perror(fname);
+	exit(1);
+}
+
+static int excluded(const char *pathname)
+{
+	int i;
+	if (nr_excludes) {
+		const char *basename = strrchr(pathname, '/');
+		basename = (basename) ? basename+1 : pathname;
+		for (i = 0; i < nr_excludes; i++)
+			if (fnmatch(excludes[i], basename, 0) == 0)
+				return 1;
+	}
+	return 0;
+}
+
+static const char **dir;
+static int nr_dir;
+static int dir_alloc;
+
+static void add_name(const char *pathname, int len)
+{
+	char *name;
+
+	if (cache_name_pos(pathname, len) >= 0)
+		return;
+
+	if (nr_dir == dir_alloc) {
+		dir_alloc = alloc_nr(dir_alloc);
+		dir = xrealloc(dir, dir_alloc*sizeof(char *));
+	}
+	name = xmalloc(len + 1);
+	memcpy(name, pathname, len + 1);
+	dir[nr_dir++] = name;
+}
+
+/*
+ * Read a directory tree. We currently ignore anything but
+ * directories and regular files. That's because git doesn't
+ * handle them at all yet. Maybe that will change some day.
+ *
+ * Also, we currently ignore all names starting with a dot.
+ * That likely will not change.
+ */
+static void read_directory(const char *path, const char *base, int baselen)
+{
+	DIR *dir = opendir(path);
+
+	if (dir) {
+		struct dirent *de;
+		char fullname[MAXPATHLEN + 1];
+		memcpy(fullname, base, baselen);
+
+		while ((de = readdir(dir)) != NULL) {
+			int len;
+
+			if (de->d_name[0] == '.')
+				continue;
+			if (excluded(de->d_name) != show_ignored)
+				continue;
+			len = strlen(de->d_name);
+			memcpy(fullname + baselen, de->d_name, len+1);
+
+			switch (DTYPE(de)) {
+			struct stat st;
+			default:
+				continue;
+			case DT_UNKNOWN:
+				if (lstat(fullname, &st))
+					continue;
+				if (S_ISREG(st.st_mode))
+					break;
+				if (!S_ISDIR(st.st_mode))
+					continue;
+				/* fallthrough */
+			case DT_DIR:
+				memcpy(fullname + baselen + len, "/", 2);
+				read_directory(fullname, fullname, baselen + len + 1);
+				continue;
+			case DT_REG:
+				break;
+			}
+			add_name(fullname, baselen + len);
+		}
+		closedir(dir);
+	}
+}
+
+static int cmp_name(const void *p1, const void *p2)
+{
+	const char *n1 = *(const char **)p1;
+	const char *n2 = *(const char **)p2;
+	int l1 = strlen(n1), l2 = strlen(n2);
+
+	return cache_name_compare(n1, l1, n2, l2);
+}
+
+static void show_files(void)
+{
+	int i;
+
+	/* For cached/deleted files we don't need to even do the readdir */
+	if (show_others) {
+		read_directory(".", "", 0);
+		qsort(dir, nr_dir, sizeof(char *), cmp_name);
+		for (i = 0; i < nr_dir; i++)
+			printf("%s%c", dir[i], line_terminator);
+	}
+	if (show_cached | show_stage) {
+		for (i = 0; i < active_nr; i++) {
+			struct cache_entry *ce = active_cache[i];
+			if (excluded(ce->name) != show_ignored)
+				continue;
+			if (show_unmerged && !ce_stage(ce))
+				continue;
+			if (!show_stage)
+				printf("%s%c", ce->name, line_terminator);
+			else
+				printf(/* "%06o %s %d %10d %s%c", */
+				       "%06o %s %d %s%c",
+				       ntohl(ce->ce_mode),
+				       sha1_to_hex(ce->sha1),
+				       ce_stage(ce),
+				       /* ntohl(ce->ce_size), */
+				       ce->name, line_terminator); 
+		}
+	}
+	if (show_deleted) {
+		for (i = 0; i < active_nr; i++) {
+			struct cache_entry *ce = active_cache[i];
+			struct stat st;
+			if (excluded(ce->name) != show_ignored)
+				continue;
+			if (!stat(ce->name, &st))
+				continue;
+			printf("%s%c", ce->name, line_terminator);
+		}
+	}
+}
+
+static const char *show_files_usage =
+	"show-files [-z] (--[cached|deleted|others|stage|unmerged])* "
+	"[ --ignored [--exclude=<pattern>] [--exclude-from=<file>) ]";
+
+int main(int argc, char **argv)
+{
+	int i;
+
+	for (i = 1; i < argc; i++) {
+		char *arg = argv[i];
+
+		if (!strcmp(arg, "-z")) {
+			line_terminator = 0;
+		} else if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
+			show_cached = 1;
+		} else if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
+			show_deleted = 1;
+		} else if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
+			show_others = 1;
+		} else if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
+			show_ignored = 1;
+		} else if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
+			show_stage = 1;
+		} else if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
+			// There's no point in showing unmerged unless you also show the stage information
+			show_stage = 1;
+			show_unmerged = 1;
+		} else if (!strcmp(arg, "-x") && i+1 < argc) {
+			add_exclude(argv[++i]);
+		} else if (!strncmp(arg, "--exclude=", 10)) {
+			add_exclude(arg+10);
+		} else if (!strcmp(arg, "-X") && i+1 < argc) {
+			add_excludes_from_file(argv[++i]);
+		} else if (!strncmp(arg, "--exclude-from=", 15)) {
+			add_excludes_from_file(arg+15);
+		} else
+			usage(show_files_usage);
+	}
+
+	if (show_ignored && !nr_excludes) {
+		fprintf(stderr, "%s: --ignored needs some exclude pattern\n", argv[0]);
+		exit(1);
+	}
+
+	/* With no flags, we default to showing the cached files */
+	if (!(show_stage | show_deleted | show_others | show_unmerged))
+		show_cached = 1;
+
+	read_cache();
+	show_files();
+	return 0;
+}