git/ls-files.c
Junio C Hamano 9ef2b3cbf6 write_name_quoted(): make one of the path a counted string.
This is to prepare for ls-tree updates.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-11-28 22:55:25 -08:00

690 lines
15 KiB
C

/*
* 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"
#include "quote.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 show_modified = 0;
static int show_killed = 0;
static int line_terminator = '\n';
static int prefix_len = 0, prefix_offset = 0;
static const char *prefix = NULL;
static const char **pathspec = NULL;
static const char *tag_cached = "";
static const char *tag_unmerged = "";
static const char *tag_removed = "";
static const char *tag_other = "";
static const char *tag_killed = "";
static const char *tag_modified = "";
static const char *exclude_per_dir = NULL;
/* We maintain three exclude pattern lists:
* EXC_CMDL lists patterns explicitly given on the command line.
* EXC_DIRS lists patterns obtained from per-directory ignore files.
* EXC_FILE lists patterns from fallback ignore files.
*/
#define EXC_CMDL 0
#define EXC_DIRS 1
#define EXC_FILE 2
static struct exclude_list {
int nr;
int alloc;
struct exclude {
const char *pattern;
const char *base;
int baselen;
} **excludes;
} exclude_list[3];
static void add_exclude(const char *string, const char *base,
int baselen, struct exclude_list *which)
{
struct exclude *x = xmalloc(sizeof (*x));
x->pattern = string;
x->base = base;
x->baselen = baselen;
if (which->nr == which->alloc) {
which->alloc = alloc_nr(which->alloc);
which->excludes = realloc(which->excludes,
which->alloc * sizeof(x));
}
which->excludes[which->nr++] = x;
}
static int add_excludes_from_file_1(const char *fname,
const char *base,
int baselen,
struct exclude_list *which)
{
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 0;
}
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 && entry[0] != '#') {
buf[i - (i && buf[i-1] == '\r')] = 0;
add_exclude(entry, base, baselen, which);
}
entry = buf + i + 1;
}
}
return 0;
err:
if (0 <= fd)
close(fd);
return -1;
}
static void add_excludes_from_file(const char *fname)
{
if (add_excludes_from_file_1(fname, "", 0,
&exclude_list[EXC_FILE]) < 0)
die("cannot use %s as an exclude file", fname);
}
static int push_exclude_per_directory(const char *base, int baselen)
{
char exclude_file[PATH_MAX];
struct exclude_list *el = &exclude_list[EXC_DIRS];
int current_nr = el->nr;
if (exclude_per_dir) {
memcpy(exclude_file, base, baselen);
strcpy(exclude_file + baselen, exclude_per_dir);
add_excludes_from_file_1(exclude_file, base, baselen, el);
}
return current_nr;
}
static void pop_exclude_per_directory(int stk)
{
struct exclude_list *el = &exclude_list[EXC_DIRS];
while (stk < el->nr)
free(el->excludes[--el->nr]);
}
/* Scan the list and let the last match determines the fate.
* Return 1 for exclude, 0 for include and -1 for undecided.
*/
static int excluded_1(const char *pathname,
int pathlen,
struct exclude_list *el)
{
int i;
if (el->nr) {
for (i = el->nr - 1; 0 <= i; i--) {
struct exclude *x = el->excludes[i];
const char *exclude = x->pattern;
int to_exclude = 1;
if (*exclude == '!') {
to_exclude = 0;
exclude++;
}
if (!strchr(exclude, '/')) {
/* match basename */
const char *basename = strrchr(pathname, '/');
basename = (basename) ? basename+1 : pathname;
if (fnmatch(exclude, basename, 0) == 0)
return to_exclude;
}
else {
/* match with FNM_PATHNAME:
* exclude has base (baselen long) inplicitly
* in front of it.
*/
int baselen = x->baselen;
if (*exclude == '/')
exclude++;
if (pathlen < baselen ||
(baselen && pathname[baselen-1] != '/') ||
strncmp(pathname, x->base, baselen))
continue;
if (fnmatch(exclude, pathname+baselen,
FNM_PATHNAME) == 0)
return to_exclude;
}
}
}
return -1; /* undecided */
}
static int excluded(const char *pathname)
{
int pathlen = strlen(pathname);
int st;
for (st = EXC_CMDL; st <= EXC_FILE; st++) {
switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
case 0:
return 0;
case 1:
return 1;
}
}
return 0;
}
struct nond_on_fs {
int len;
char name[0];
};
static struct nond_on_fs **dir;
static int nr_dir;
static int dir_alloc;
static void add_name(const char *pathname, int len)
{
struct nond_on_fs *ent;
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(ent));
}
ent = xmalloc(sizeof(*ent) + len + 1);
ent->len = len;
memcpy(ent->name, pathname, len);
ent->name[len] = 0;
dir[nr_dir++] = ent;
}
/*
* Read a directory tree. We currently ignore anything but
* directories, regular files and symlinks. That's because git
* doesn't handle them at all yet. Maybe that will change some
* day.
*
* Also, we ignore the name ".git" (even if it is not a directory).
* That likely will not change.
*/
static void read_directory(const char *path, const char *base, int baselen)
{
DIR *dir = opendir(path);
if (dir) {
int exclude_stk;
struct dirent *de;
char fullname[MAXPATHLEN + 1];
memcpy(fullname, base, baselen);
exclude_stk = push_exclude_per_directory(base, baselen);
while ((de = readdir(dir)) != NULL) {
int len;
if ((de->d_name[0] == '.') &&
(de->d_name[1] == 0 ||
!strcmp(de->d_name + 1, ".") ||
!strcmp(de->d_name + 1, "git")))
continue;
len = strlen(de->d_name);
memcpy(fullname + baselen, de->d_name, len+1);
if (excluded(fullname) != show_ignored)
continue;
switch (DTYPE(de)) {
struct stat st;
default:
continue;
case DT_UNKNOWN:
if (lstat(fullname, &st))
continue;
if (S_ISREG(st.st_mode) || S_ISLNK(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:
case DT_LNK:
break;
}
add_name(fullname, baselen + len);
}
closedir(dir);
pop_exclude_per_directory(exclude_stk);
}
}
static int cmp_name(const void *p1, const void *p2)
{
const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
return cache_name_compare(e1->name, e1->len,
e2->name, e2->len);
}
/*
* Match a pathspec against a filename. The first "len" characters
* are the common prefix
*/
static int match(const char **spec, const char *filename, int len)
{
const char *m;
while ((m = *spec++) != NULL) {
int matchlen = strlen(m + len);
if (!matchlen)
return 1;
if (!strncmp(m + len, filename + len, matchlen)) {
if (m[len + matchlen - 1] == '/')
return 1;
switch (filename[len + matchlen]) {
case '/': case '\0':
return 1;
}
}
if (!fnmatch(m + len, filename + len, 0))
return 1;
}
return 0;
}
static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
{
int len = prefix_len;
int offset = prefix_offset;
if (len >= ent->len)
die("git-ls-files: internal error - directory entry not superset of prefix");
if (pathspec && !match(pathspec, ent->name, len))
return;
fputs(tag, stdout);
write_name_quoted("", 0, ent->name + offset, line_terminator, stdout);
putchar(line_terminator);
}
static void show_other_files(void)
{
int i;
for (i = 0; i < nr_dir; i++) {
/* We should not have a matching entry, but we
* may have an unmerged entry for this path.
*/
struct nond_on_fs *ent = dir[i];
int pos = cache_name_pos(ent->name, ent->len);
struct cache_entry *ce;
if (0 <= pos)
die("bug in show-other-files");
pos = -pos - 1;
if (pos < active_nr) {
ce = active_cache[pos];
if (ce_namelen(ce) == ent->len &&
!memcmp(ce->name, ent->name, ent->len))
continue; /* Yup, this one exists unmerged */
}
show_dir_entry(tag_other, ent);
}
}
static void show_killed_files(void)
{
int i;
for (i = 0; i < nr_dir; i++) {
struct nond_on_fs *ent = dir[i];
char *cp, *sp;
int pos, len, killed = 0;
for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
sp = strchr(cp, '/');
if (!sp) {
/* If ent->name is prefix of an entry in the
* cache, it will be killed.
*/
pos = cache_name_pos(ent->name, ent->len);
if (0 <= pos)
die("bug in show-killed-files");
pos = -pos - 1;
while (pos < active_nr &&
ce_stage(active_cache[pos]))
pos++; /* skip unmerged */
if (active_nr <= pos)
break;
/* pos points at a name immediately after
* ent->name in the cache. Does it expect
* ent->name to be a directory?
*/
len = ce_namelen(active_cache[pos]);
if ((ent->len < len) &&
!strncmp(active_cache[pos]->name,
ent->name, ent->len) &&
active_cache[pos]->name[ent->len] == '/')
killed = 1;
break;
}
if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
/* If any of the leading directories in
* ent->name is registered in the cache,
* ent->name will be killed.
*/
killed = 1;
break;
}
}
if (killed)
show_dir_entry(tag_killed, dir[i]);
}
}
static void show_ce_entry(const char *tag, struct cache_entry *ce)
{
int len = prefix_len;
int offset = prefix_offset;
if (len >= ce_namelen(ce))
die("git-ls-files: internal error - cache entry not superset of prefix");
if (pathspec && !match(pathspec, ce->name, len))
return;
if (!show_stage) {
fputs(tag, stdout);
write_name_quoted("", 0, ce->name + offset,
line_terminator, stdout);
putchar(line_terminator);
}
else {
printf("%s%06o %s %d\t",
tag,
ntohl(ce->ce_mode),
sha1_to_hex(ce->sha1),
ce_stage(ce));
write_name_quoted("", 0, ce->name + offset,
line_terminator, stdout);
putchar(line_terminator);
}
}
static void show_files(void)
{
int i;
/* For cached/deleted files we don't need to even do the readdir */
if (show_others || show_killed) {
const char *path = ".", *base = "";
int baselen = prefix_len;
if (baselen)
path = base = prefix;
read_directory(path, base, baselen);
qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
if (show_others)
show_other_files();
if (show_killed)
show_killed_files();
}
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;
show_ce_entry(ce_stage(ce) ? tag_unmerged : tag_cached, ce);
}
}
if (show_deleted | show_modified) {
for (i = 0; i < active_nr; i++) {
struct cache_entry *ce = active_cache[i];
struct stat st;
int err;
if (excluded(ce->name) != show_ignored)
continue;
err = lstat(ce->name, &st);
if (show_deleted && err)
show_ce_entry(tag_removed, ce);
if (show_modified && ce_modified(ce, &st))
show_ce_entry(tag_modified, ce);
}
}
}
/*
* Prune the index to only contain stuff starting with "prefix"
*/
static void prune_cache(void)
{
int pos = cache_name_pos(prefix, prefix_len);
unsigned int first, last;
if (pos < 0)
pos = -pos-1;
active_cache += pos;
active_nr -= pos;
first = 0;
last = active_nr;
while (last > first) {
int next = (last + first) >> 1;
struct cache_entry *ce = active_cache[next];
if (!strncmp(ce->name, prefix, prefix_len)) {
first = next+1;
continue;
}
last = next;
}
active_nr = last;
}
static void verify_pathspec(void)
{
const char **p, *n, *prev;
char *real_prefix;
unsigned long max;
prev = NULL;
max = PATH_MAX;
for (p = pathspec; (n = *p) != NULL; p++) {
int i, len = 0;
for (i = 0; i < max; i++) {
char c = n[i];
if (prev && prev[i] != c)
break;
if (!c || c == '*' || c == '?')
break;
if (c == '/')
len = i+1;
}
prev = n;
if (len < max) {
max = len;
if (!max)
break;
}
}
if (prefix_offset > max || memcmp(prev, prefix, prefix_offset))
die("git-ls-files: cannot generate relative filenames containing '..'");
real_prefix = NULL;
prefix_len = max;
if (max) {
real_prefix = xmalloc(max + 1);
memcpy(real_prefix, prev, max);
real_prefix[max] = 0;
}
prefix = real_prefix;
}
static const char ls_files_usage[] =
"git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed|modified])* "
"[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
"[ --exclude-per-directory=<filename> ] [--] [<file>]*";
int main(int argc, const char **argv)
{
int i;
int exc_given = 0;
prefix = setup_git_directory();
if (prefix)
prefix_offset = strlen(prefix);
git_config(git_default_config);
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--")) {
i++;
break;
}
if (!strcmp(arg, "-z")) {
line_terminator = 0;
continue;
}
if (!strcmp(arg, "-t")) {
tag_cached = "H ";
tag_unmerged = "M ";
tag_removed = "R ";
tag_modified = "C ";
tag_other = "? ";
tag_killed = "K ";
continue;
}
if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
show_cached = 1;
continue;
}
if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
show_deleted = 1;
continue;
}
if (!strcmp(arg, "-m") || !strcmp(arg, "--modified")) {
show_modified = 1;
continue;
}
if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
show_others = 1;
continue;
}
if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
show_ignored = 1;
continue;
}
if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
show_stage = 1;
continue;
}
if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
show_killed = 1;
continue;
}
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;
continue;
}
if (!strcmp(arg, "-x") && i+1 < argc) {
exc_given = 1;
add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
continue;
}
if (!strncmp(arg, "--exclude=", 10)) {
exc_given = 1;
add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
continue;
}
if (!strcmp(arg, "-X") && i+1 < argc) {
exc_given = 1;
add_excludes_from_file(argv[++i]);
continue;
}
if (!strncmp(arg, "--exclude-from=", 15)) {
exc_given = 1;
add_excludes_from_file(arg+15);
continue;
}
if (!strncmp(arg, "--exclude-per-directory=", 24)) {
exc_given = 1;
exclude_per_dir = arg + 24;
continue;
}
if (!strcmp(arg, "--full-name")) {
prefix_offset = 0;
continue;
}
if (*arg == '-')
usage(ls_files_usage);
break;
}
pathspec = get_pathspec(prefix, argv + i);
/* Verify that the pathspec matches the prefix */
if (pathspec)
verify_pathspec();
if (show_ignored && !exc_given) {
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_killed | show_modified))
show_cached = 1;
read_cache();
if (prefix)
prune_cache();
show_files();
return 0;
}