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https://github.com/git/git
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fee8825613
Pasky and others raised many valid points on the problems initial exclude pattern enhancement work had. Based on the list discussion, rework the exclude logic to use "last match determines its fate" rule, and order the list by exclude-from (the fallback default pattern file), exclude-per-directory (shallower to deeper, so deeper ones can override), and then command line exclude patterns. Signed-off-by: Junio C Hamano <junkio@cox.net>
476 lines
11 KiB
C
476 lines
11 KiB
C
/*
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* This merges the file listing in the directory cache index
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* with the actual working directory list, and shows different
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* combinations of the two.
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*
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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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static int show_deleted = 0;
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static int show_cached = 0;
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static int show_others = 0;
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static int show_ignored = 0;
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static int show_stage = 0;
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static int show_unmerged = 0;
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static int show_killed = 0;
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static int line_terminator = '\n';
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static const char *tag_cached = "";
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static const char *tag_unmerged = "";
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static const char *tag_removed = "";
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static const char *tag_other = "";
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static const char *tag_killed = "";
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static char *exclude_per_dir = NULL;
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/* We maintain three exclude pattern lists:
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* EXC_CMDL lists patterns explicitly given on the command line.
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* EXC_DIRS lists patterns obtained from per-directory ignore files.
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* EXC_FILE lists patterns from fallback ignore files.
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*/
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#define EXC_CMDL 0
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#define EXC_DIRS 1
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#define EXC_FILE 2
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static struct exclude_list {
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int nr;
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int alloc;
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struct exclude {
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const char *pattern;
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const char *base;
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int baselen;
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} **excludes;
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} exclude_list[3];
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static void add_exclude(const char *string, const char *base,
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int baselen, struct exclude_list *which)
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{
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struct exclude *x = xmalloc(sizeof (*x));
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x->pattern = string;
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x->base = base;
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x->baselen = baselen;
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if (which->nr == which->alloc) {
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which->alloc = alloc_nr(which->alloc);
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which->excludes = realloc(which->excludes,
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which->alloc * sizeof(x));
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}
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which->excludes[which->nr++] = x;
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}
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static int add_excludes_from_file_1(const char *fname,
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const char *base,
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int baselen,
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struct exclude_list *which)
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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 0;
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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 && entry[0] != '#') {
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buf[i] = 0;
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add_exclude(entry, base, baselen, which);
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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 0;
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err:
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if (0 <= fd)
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close(fd);
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return -1;
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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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if (add_excludes_from_file_1(fname, "", 0,
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&exclude_list[EXC_FILE]) < 0)
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die("cannot use %s as an exclude file", fname);
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}
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static int push_exclude_per_directory(const char *base, int baselen)
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{
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char exclude_file[PATH_MAX];
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struct exclude_list *el = &exclude_list[EXC_DIRS];
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int current_nr = el->nr;
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if (exclude_per_dir) {
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memcpy(exclude_file, base, baselen);
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strcpy(exclude_file + baselen, exclude_per_dir);
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add_excludes_from_file_1(exclude_file, base, baselen, el);
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}
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return current_nr;
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}
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static void pop_exclude_per_directory(int stk)
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{
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struct exclude_list *el = &exclude_list[EXC_DIRS];
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while (stk < el->nr)
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free(el->excludes[--el->nr]);
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}
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/* Scan the list and let the last match determines the fate.
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* Return 1 for exclude, 0 for include and -1 for undecided.
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*/
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static int excluded_1(const char *pathname,
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int pathlen,
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struct exclude_list *el)
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{
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int i;
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if (el->nr) {
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for (i = el->nr - 1; 0 <= i; i--) {
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struct exclude *x = el->excludes[i];
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const char *exclude = x->pattern;
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int to_exclude = 1;
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if (*exclude == '!') {
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to_exclude = 0;
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exclude++;
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}
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if (!strchr(exclude, '/')) {
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/* match basename */
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const char *basename = strrchr(pathname, '/');
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basename = (basename) ? basename+1 : pathname;
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if (fnmatch(exclude, basename, 0) == 0)
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return to_exclude;
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}
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else {
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/* match with FNM_PATHNAME:
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* exclude has base (baselen long) inplicitly
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* in front of it.
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*/
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int baselen = x->baselen;
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if (*exclude == '/')
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exclude++;
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if (pathlen < baselen ||
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(baselen && pathname[baselen-1] != '/') ||
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strncmp(pathname, x->base, baselen))
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continue;
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if (fnmatch(exclude, pathname+baselen,
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FNM_PATHNAME) == 0)
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return to_exclude;
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}
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}
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}
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return -1; /* undecided */
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}
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static int excluded(const char *pathname)
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{
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int pathlen = strlen(pathname);
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int st;
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for (st = EXC_CMDL; st <= EXC_FILE; st++) {
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switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
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case 0:
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return 0;
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case 1:
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return 1;
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}
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}
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return 0;
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}
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struct nond_on_fs {
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int len;
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char name[0];
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};
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static struct nond_on_fs **dir;
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static int nr_dir;
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static int dir_alloc;
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static void add_name(const char *pathname, int len)
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{
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struct nond_on_fs *ent;
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if (cache_name_pos(pathname, len) >= 0)
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return;
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if (nr_dir == dir_alloc) {
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dir_alloc = alloc_nr(dir_alloc);
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dir = xrealloc(dir, dir_alloc*sizeof(ent));
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}
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ent = xmalloc(sizeof(*ent) + len + 1);
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ent->len = len;
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memcpy(ent->name, pathname, len);
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dir[nr_dir++] = ent;
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}
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/*
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* Read a directory tree. We currently ignore anything but
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* directories, regular files and symlinks. That's because git
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* doesn't handle them at all yet. Maybe that will change some
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* day.
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*
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* Also, we ignore the name ".git" (even if it is not a directory).
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* That likely will not change.
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*/
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static void read_directory(const char *path, const char *base, int baselen)
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{
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DIR *dir = opendir(path);
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if (dir) {
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int exclude_stk;
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struct dirent *de;
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char fullname[MAXPATHLEN + 1];
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memcpy(fullname, base, baselen);
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exclude_stk = push_exclude_per_directory(base, baselen);
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while ((de = readdir(dir)) != NULL) {
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int len;
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if ((de->d_name[0] == '.') &&
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(de->d_name[1] == 0 ||
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!strcmp(de->d_name + 1, ".") ||
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!strcmp(de->d_name + 1, "git")))
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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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if (excluded(fullname) != show_ignored)
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continue;
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switch (DTYPE(de)) {
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struct stat st;
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default:
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continue;
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case DT_UNKNOWN:
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if (lstat(fullname, &st))
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continue;
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if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
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break;
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if (!S_ISDIR(st.st_mode))
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continue;
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/* fallthrough */
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case DT_DIR:
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memcpy(fullname + baselen + len, "/", 2);
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read_directory(fullname, fullname,
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baselen + len + 1);
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continue;
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case DT_REG:
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case DT_LNK:
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break;
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}
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add_name(fullname, baselen + len);
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}
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closedir(dir);
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pop_exclude_per_directory(exclude_stk);
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}
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}
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static int cmp_name(const void *p1, const void *p2)
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{
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const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
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const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
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return cache_name_compare(e1->name, e1->len,
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e2->name, e2->len);
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}
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static void show_killed_files(void)
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{
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int i;
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for (i = 0; i < nr_dir; i++) {
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struct nond_on_fs *ent = dir[i];
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char *cp, *sp;
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int pos, len, killed = 0;
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for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
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sp = strchr(cp, '/');
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if (!sp) {
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/* If ent->name is prefix of an entry in the
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* cache, it will be killed.
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*/
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pos = cache_name_pos(ent->name, ent->len);
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if (0 <= pos)
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die("bug in show-killed-files");
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pos = -pos - 1;
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while (pos < active_nr &&
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ce_stage(active_cache[pos]))
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pos++; /* skip unmerged */
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if (active_nr <= pos)
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break;
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/* pos points at a name immediately after
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* ent->name in the cache. Does it expect
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* ent->name to be a directory?
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*/
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len = ce_namelen(active_cache[pos]);
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if ((ent->len < len) &&
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!strncmp(active_cache[pos]->name,
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ent->name, ent->len) &&
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active_cache[pos]->name[ent->len] == '/')
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killed = 1;
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break;
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}
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if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
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/* If any of the leading directories in
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* ent->name is registered in the cache,
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* ent->name will be killed.
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*/
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killed = 1;
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break;
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}
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}
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if (killed)
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printf("%s%.*s%c", tag_killed,
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dir[i]->len, dir[i]->name,
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line_terminator);
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}
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}
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static void show_files(void)
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{
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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_killed) {
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read_directory(".", "", 0);
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qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
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if (show_others)
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for (i = 0; i < nr_dir; i++)
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printf("%s%.*s%c", tag_other,
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dir[i]->len, dir[i]->name,
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line_terminator);
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if (show_killed)
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show_killed_files();
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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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printf("%s%s%c",
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ce_stage(ce) ? tag_unmerged :
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tag_cached,
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ce->name, line_terminator);
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else
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printf("%s%06o %s %d\t%s%c",
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ce_stage(ce) ? tag_unmerged :
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tag_cached,
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ntohl(ce->ce_mode),
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sha1_to_hex(ce->sha1),
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ce_stage(ce),
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ce->name, line_terminator);
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}
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}
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if (show_deleted) {
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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 (!lstat(ce->name, &st))
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continue;
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printf("%s%s%c", tag_removed, ce->name,
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line_terminator);
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}
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}
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}
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static const char *ls_files_usage =
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"git-ls-files [-z] [-t] (--[cached|deleted|others|stage|unmerged|killed])* "
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"[ --ignored ] [--exclude=<pattern>] [--exclude-from=<file>] "
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"[ --exclude-per-directory=<filename> ]";
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;
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int main(int argc, char **argv)
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{
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int i;
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int exc_given = 0;
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for (i = 1; i < argc; i++) {
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char *arg = argv[i];
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if (!strcmp(arg, "-z")) {
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line_terminator = 0;
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} else if (!strcmp(arg, "-t")) {
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tag_cached = "H ";
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tag_unmerged = "M ";
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tag_removed = "R ";
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tag_other = "? ";
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tag_killed = "K ";
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} else if (!strcmp(arg, "-c") || !strcmp(arg, "--cached")) {
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show_cached = 1;
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} else if (!strcmp(arg, "-d") || !strcmp(arg, "--deleted")) {
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show_deleted = 1;
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} else if (!strcmp(arg, "-o") || !strcmp(arg, "--others")) {
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show_others = 1;
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} else if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
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show_ignored = 1;
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} else if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
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show_stage = 1;
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} else if (!strcmp(arg, "-k") || !strcmp(arg, "--killed")) {
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show_killed = 1;
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} else if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
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/* There's no point in showing unmerged unless
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* you also show the stage information.
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*/
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show_stage = 1;
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show_unmerged = 1;
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} else if (!strcmp(arg, "-x") && i+1 < argc) {
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exc_given = 1;
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add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
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} else if (!strncmp(arg, "--exclude=", 10)) {
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exc_given = 1;
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add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
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} else if (!strcmp(arg, "-X") && i+1 < argc) {
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exc_given = 1;
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add_excludes_from_file(argv[++i]);
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} else if (!strncmp(arg, "--exclude-from=", 15)) {
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exc_given = 1;
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add_excludes_from_file(arg+15);
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} else if (!strncmp(arg, "--exclude-per-directory=", 24)) {
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exc_given = 1;
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exclude_per_dir = arg + 24;
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} else
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usage(ls_files_usage);
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}
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if (show_ignored && !exc_given) {
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fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
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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_unmerged | show_killed))
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show_cached = 1;
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read_cache();
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show_files();
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return 0;
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}
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