Add "show-files" command to show the list of managed (or non-managed) files.

You want things like this to check in a patch..

Makefile

@@ -2,7 +2,7 @@ CFLAGS=-g -O3 -Wall
 CC=gcc
 
 PROG=	update-cache show-diff init-db write-tree read-tree commit-tree \
-	cat-file fsck-cache checkout-cache diff-tree rev-tree
+	cat-file fsck-cache checkout-cache diff-tree rev-tree show-files
 
 all: $(PROG)
 
@@ -43,6 +43,9 @@ diff-tree: diff-tree.o read-cache.o
 rev-tree: rev-tree.o read-cache.o
 	$(CC) $(CFLAGS) -o rev-tree rev-tree.o read-cache.o $(LIBS)
 
+show-files: show-files.o read-cache.o
+	$(CC) $(CFLAGS) -o show-files show-files.o read-cache.o $(LIBS)
+
 read-cache.o: cache.h
 show-diff.o: cache.h
 

show-files.c

@@ -0,0 +1,164 @@
+/*
+ * 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 <sys/param.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 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 = realloc(dir, dir_alloc*sizeof(char *));
+	}
+	name = malloc(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;
+			len = strlen(de->d_name);
+			memcpy(fullname + baselen, de->d_name, len+1);
+
+			switch (de->d_type) {
+			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 | show_ignored) {
+		read_directory(".", "", 0);
+		qsort(dir, nr_dir, sizeof(char *), cmp_name);
+	}
+	if (show_others) {
+		for (i = 0; i < nr_dir; i++)
+			printf("%s\n", dir[i]);
+	}
+	if (show_cached) {
+		for (i = 0; i < active_nr; i++) {
+			struct cache_entry *ce = active_cache[i];
+			printf("%s\n", ce->name);
+		}
+	}
+	if (show_deleted) {
+		for (i = 0; i < active_nr; i++) {
+			struct cache_entry *ce = active_cache[i];
+			struct stat st;
+			if (!stat(ce->name, &st))
+				continue;
+			printf("%s\n", ce->name);
+		}
+	}
+	if (show_ignored) {
+		/* We don't have any "ignore" list yet */
+	}
+}
+
+int main(int argc, char **argv)
+{
+	int i;
+
+	for (i = 1; i < argc; i++) {
+		char *arg = argv[i];
+
+		if (!strcmp(arg, "--cached")) {
+			show_cached = 1;
+			continue;
+		}
+		if (!strcmp(arg, "--deleted")) {
+			show_deleted = 1;
+			continue;
+		}
+		if (!strcmp(arg, "--others")) {
+			show_others = 1;
+			continue;
+		}
+		if (!strcmp(arg, "--ignored")) {
+			show_ignored = 1;
+			continue;
+		}
+
+		usage("show-files (--[cached|deleted|others|ignoded])*");
+	}
+
+	/* With no flags, we default to showing the cached files */
+	if (!(show_cached | show_deleted | show_others | show_ignored))
+		show_cached = 1;
+
+	read_cache();
+	show_files();
+	return 0;
+}