mirror of
https://github.com/git/git.git
synced 2024-10-30 05:47:53 +01:00
b991625611
This makes "git-ls-files --others --directory --ignored" behave as documented and consequently also fixes "git-clean -d -X". Previously, git-clean would remove non-excluded directories even when using the -X option. Signed-off-by: Michael Spang <mspang@uwaterloo.ca> Signed-off-by: Junio C Hamano <junkio@cox.net>
621 lines
14 KiB
C
621 lines
14 KiB
C
/*
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* This handles recursive filename detection with exclude
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* files, index knowledge etc..
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*
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* Copyright (C) Linus Torvalds, 2005-2006
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* Junio Hamano, 2005-2006
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*/
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#include "cache.h"
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#include "dir.h"
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#include "refs.h"
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struct path_simplify {
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int len;
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const char *path;
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};
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static int read_directory_recursive(struct dir_struct *dir,
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const char *path, const char *base, int baselen,
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int check_only, const struct path_simplify *simplify);
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int common_prefix(const char **pathspec)
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{
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const char *path, *slash, *next;
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int prefix;
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if (!pathspec)
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return 0;
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path = *pathspec;
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slash = strrchr(path, '/');
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if (!slash)
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return 0;
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prefix = slash - path + 1;
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while ((next = *++pathspec) != NULL) {
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int len = strlen(next);
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if (len >= prefix && !memcmp(path, next, prefix))
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continue;
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len = prefix - 1;
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for (;;) {
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if (!len)
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return 0;
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if (next[--len] != '/')
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continue;
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if (memcmp(path, next, len+1))
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continue;
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prefix = len + 1;
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break;
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}
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}
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return prefix;
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}
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/*
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* Does 'match' matches the given name?
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* A match is found if
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*
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* (1) the 'match' string is leading directory of 'name', or
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* (2) the 'match' string is a wildcard and matches 'name', or
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* (3) the 'match' string is exactly the same as 'name'.
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*
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* and the return value tells which case it was.
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*
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* It returns 0 when there is no match.
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*/
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static int match_one(const char *match, const char *name, int namelen)
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{
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int matchlen;
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/* If the match was just the prefix, we matched */
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matchlen = strlen(match);
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if (!matchlen)
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return MATCHED_RECURSIVELY;
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/*
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* If we don't match the matchstring exactly,
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* we need to match by fnmatch
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*/
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if (strncmp(match, name, matchlen))
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return !fnmatch(match, name, 0) ? MATCHED_FNMATCH : 0;
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if (!name[matchlen])
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return MATCHED_EXACTLY;
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if (match[matchlen-1] == '/' || name[matchlen] == '/')
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return MATCHED_RECURSIVELY;
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return 0;
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}
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/*
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* Given a name and a list of pathspecs, see if the name matches
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* any of the pathspecs. The caller is also interested in seeing
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* all pathspec matches some names it calls this function with
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* (otherwise the user could have mistyped the unmatched pathspec),
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* and a mark is left in seen[] array for pathspec element that
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* actually matched anything.
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*/
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int match_pathspec(const char **pathspec, const char *name, int namelen, int prefix, char *seen)
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{
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int retval;
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const char *match;
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name += prefix;
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namelen -= prefix;
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for (retval = 0; (match = *pathspec++) != NULL; seen++) {
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int how;
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if (retval && *seen == MATCHED_EXACTLY)
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continue;
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match += prefix;
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how = match_one(match, name, namelen);
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if (how) {
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if (retval < how)
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retval = how;
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if (*seen < how)
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*seen = how;
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}
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}
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return retval;
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}
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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 = xrealloc(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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struct stat st;
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int fd, i;
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size_t size;
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char *buf, *entry;
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fd = open(fname, O_RDONLY);
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if (fd < 0 || fstat(fd, &st) < 0)
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goto err;
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size = xsize_t(st.st_size);
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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+1);
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if (read_in_full(fd, buf, size) != size)
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goto err;
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close(fd);
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buf[size++] = '\n';
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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 - (i && buf[i-1] == '\r')] = 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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void add_excludes_from_file(struct dir_struct *dir, const char *fname)
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{
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if (add_excludes_from_file_1(fname, "", 0,
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&dir->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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int push_exclude_per_directory(struct dir_struct *dir, 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 = &dir->exclude_list[EXC_DIRS];
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int current_nr = el->nr;
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if (dir->exclude_per_dir) {
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memcpy(exclude_file, base, baselen);
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strcpy(exclude_file + baselen, dir->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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void pop_exclude_per_directory(struct dir_struct *dir, int stk)
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{
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struct exclude_list *el = &dir->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) implicitly
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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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int excluded(struct dir_struct *dir, 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, &dir->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 dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
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{
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struct dir_entry *ent;
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if (cache_name_pos(pathname, len) >= 0)
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return NULL;
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if (dir->nr == dir->alloc) {
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int alloc = alloc_nr(dir->alloc);
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dir->alloc = alloc;
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dir->entries = xrealloc(dir->entries, alloc*sizeof(ent));
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}
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ent = xmalloc(sizeof(*ent) + len + 1);
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ent->ignored = ent->ignored_dir = 0;
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ent->len = len;
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memcpy(ent->name, pathname, len);
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ent->name[len] = 0;
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dir->entries[dir->nr++] = ent;
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return ent;
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}
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enum exist_status {
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index_nonexistent = 0,
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index_directory,
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index_gitdir,
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};
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/*
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* The index sorts alphabetically by entry name, which
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* means that a gitlink sorts as '\0' at the end, while
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* a directory (which is defined not as an entry, but as
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* the files it contains) will sort with the '/' at the
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* end.
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*/
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static enum exist_status directory_exists_in_index(const char *dirname, int len)
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{
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int pos = cache_name_pos(dirname, len);
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if (pos < 0)
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pos = -pos-1;
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while (pos < active_nr) {
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struct cache_entry *ce = active_cache[pos++];
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unsigned char endchar;
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if (strncmp(ce->name, dirname, len))
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break;
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endchar = ce->name[len];
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if (endchar > '/')
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break;
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if (endchar == '/')
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return index_directory;
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if (!endchar && S_ISDIRLNK(ntohl(ce->ce_mode)))
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return index_gitdir;
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}
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return index_nonexistent;
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}
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/*
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* When we find a directory when traversing the filesystem, we
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* have three distinct cases:
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*
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* - ignore it
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* - see it as a directory
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* - recurse into it
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*
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* and which one we choose depends on a combination of existing
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* git index contents and the flags passed into the directory
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* traversal routine.
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*
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* Case 1: If we *already* have entries in the index under that
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* directory name, we always recurse into the directory to see
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* all the files.
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*
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* Case 2: If we *already* have that directory name as a gitlink,
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* we always continue to see it as a gitlink, regardless of whether
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* there is an actual git directory there or not (it might not
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* be checked out as a subproject!)
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*
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* Case 3: if we didn't have it in the index previously, we
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* have a few sub-cases:
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*
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* (a) if "show_other_directories" is true, we show it as
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* just a directory, unless "hide_empty_directories" is
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* also true and the directory is empty, in which case
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* we just ignore it entirely.
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* (b) if it looks like a git directory, and we don't have
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* 'no_dirlinks' set we treat it as a gitlink, and show it
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* as a directory.
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* (c) otherwise, we recurse into it.
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*/
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enum directory_treatment {
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show_directory,
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ignore_directory,
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recurse_into_directory,
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};
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static enum directory_treatment treat_directory(struct dir_struct *dir,
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const char *dirname, int len,
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const struct path_simplify *simplify)
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{
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/* The "len-1" is to strip the final '/' */
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switch (directory_exists_in_index(dirname, len-1)) {
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case index_directory:
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return recurse_into_directory;
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case index_gitdir:
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if (dir->show_other_directories)
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return ignore_directory;
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return show_directory;
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case index_nonexistent:
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if (dir->show_other_directories)
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break;
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if (!dir->no_dirlinks) {
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unsigned char sha1[20];
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if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
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return show_directory;
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}
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return recurse_into_directory;
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}
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/* This is the "show_other_directories" case */
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if (!dir->hide_empty_directories)
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return show_directory;
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if (!read_directory_recursive(dir, dirname, dirname, len, 1, simplify))
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return ignore_directory;
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return show_directory;
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}
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/*
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* This is an inexact early pruning of any recursive directory
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* reading - if the path cannot possibly be in the pathspec,
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* return true, and we'll skip it early.
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*/
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static int simplify_away(const char *path, int pathlen, const struct path_simplify *simplify)
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{
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if (simplify) {
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for (;;) {
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const char *match = simplify->path;
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int len = simplify->len;
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if (!match)
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break;
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if (len > pathlen)
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len = pathlen;
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if (!memcmp(path, match, len))
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return 0;
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simplify++;
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}
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return 1;
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}
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return 0;
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}
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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 int read_directory_recursive(struct dir_struct *dir, const char *path, const char *base, int baselen, int check_only, const struct path_simplify *simplify)
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{
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DIR *fdir = opendir(path);
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int contents = 0;
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if (fdir) {
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int exclude_stk;
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struct dirent *de;
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char fullname[PATH_MAX + 1];
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memcpy(fullname, base, baselen);
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exclude_stk = push_exclude_per_directory(dir, base, baselen);
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while ((de = readdir(fdir)) != NULL) {
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int len;
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int exclude;
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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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/* Ignore overly long pathnames! */
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if (len + baselen + 8 > sizeof(fullname))
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continue;
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memcpy(fullname + baselen, de->d_name, len+1);
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if (simplify_away(fullname, baselen + len, simplify))
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continue;
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exclude = excluded(dir, fullname);
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if (exclude != dir->show_ignored) {
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if (!dir->show_ignored || DTYPE(de) != DT_DIR) {
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continue;
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}
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}
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|
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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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len++;
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switch (treat_directory(dir, fullname, baselen + len, simplify)) {
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case show_directory:
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if (exclude != dir->show_ignored)
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continue;
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break;
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case recurse_into_directory:
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contents += read_directory_recursive(dir,
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fullname, fullname, baselen + len, 0, simplify);
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continue;
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case ignore_directory:
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continue;
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}
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break;
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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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contents++;
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if (check_only)
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goto exit_early;
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else
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dir_add_name(dir, fullname, baselen + len);
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}
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exit_early:
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closedir(fdir);
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|
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pop_exclude_per_directory(dir, exclude_stk);
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}
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|
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return contents;
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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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const struct dir_entry *e1 = *(const struct dir_entry **)p1;
|
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const struct dir_entry *e2 = *(const struct dir_entry **)p2;
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|
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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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|
|
/*
|
|
* Return the length of the "simple" part of a path match limiter.
|
|
*/
|
|
static int simple_length(const char *match)
|
|
{
|
|
const char special[256] = {
|
|
[0] = 1, ['?'] = 1,
|
|
['\\'] = 1, ['*'] = 1,
|
|
['['] = 1
|
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};
|
|
int len = -1;
|
|
|
|
for (;;) {
|
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unsigned char c = *match++;
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len++;
|
|
if (special[c])
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return len;
|
|
}
|
|
}
|
|
|
|
static struct path_simplify *create_simplify(const char **pathspec)
|
|
{
|
|
int nr, alloc = 0;
|
|
struct path_simplify *simplify = NULL;
|
|
|
|
if (!pathspec)
|
|
return NULL;
|
|
|
|
for (nr = 0 ; ; nr++) {
|
|
const char *match;
|
|
if (nr >= alloc) {
|
|
alloc = alloc_nr(alloc);
|
|
simplify = xrealloc(simplify, alloc * sizeof(*simplify));
|
|
}
|
|
match = *pathspec++;
|
|
if (!match)
|
|
break;
|
|
simplify[nr].path = match;
|
|
simplify[nr].len = simple_length(match);
|
|
}
|
|
simplify[nr].path = NULL;
|
|
simplify[nr].len = 0;
|
|
return simplify;
|
|
}
|
|
|
|
static void free_simplify(struct path_simplify *simplify)
|
|
{
|
|
if (simplify)
|
|
free(simplify);
|
|
}
|
|
|
|
int read_directory(struct dir_struct *dir, const char *path, const char *base, int baselen, const char **pathspec)
|
|
{
|
|
struct path_simplify *simplify = create_simplify(pathspec);
|
|
|
|
/*
|
|
* Make sure to do the per-directory exclude for all the
|
|
* directories leading up to our base.
|
|
*/
|
|
if (baselen) {
|
|
if (dir->exclude_per_dir) {
|
|
char *p, *pp = xmalloc(baselen+1);
|
|
memcpy(pp, base, baselen+1);
|
|
p = pp;
|
|
while (1) {
|
|
char save = *p;
|
|
*p = 0;
|
|
push_exclude_per_directory(dir, pp, p-pp);
|
|
*p++ = save;
|
|
if (!save)
|
|
break;
|
|
p = strchr(p, '/');
|
|
if (p)
|
|
p++;
|
|
else
|
|
p = pp + baselen;
|
|
}
|
|
free(pp);
|
|
}
|
|
}
|
|
|
|
read_directory_recursive(dir, path, base, baselen, 0, simplify);
|
|
free_simplify(simplify);
|
|
qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name);
|
|
return dir->nr;
|
|
}
|
|
|
|
int
|
|
file_exists(const char *f)
|
|
{
|
|
struct stat sb;
|
|
return stat(f, &sb) == 0;
|
|
}
|