diff options
Diffstat (limited to 'tree-walk.c')
| -rw-r--r-- | tree-walk.c | 255 |
1 files changed, 216 insertions, 39 deletions
diff --git a/tree-walk.c b/tree-walk.c index 492c7cd744..5dd9a71804 100644 --- a/tree-walk.c +++ b/tree-walk.c @@ -3,6 +3,7 @@ #include "unpack-trees.h" #include "dir.h" #include "tree.h" +#include "pathspec.h" static const char *get_mode(const char *str, unsigned int *modep) { @@ -36,7 +37,7 @@ static void decode_tree_entry(struct tree_desc *desc, const char *buf, unsigned /* Initialize the descriptor entry */ desc->entry.path = path; - desc->entry.mode = mode; + desc->entry.mode = canon_mode(mode); desc->entry.sha1 = (const unsigned char *)(path + len); } @@ -143,16 +144,6 @@ struct tree_desc_x { struct tree_desc_skip *skip; }; -static int name_compare(const char *a, int a_len, - const char *b, int b_len) -{ - int len = (a_len < b_len) ? a_len : b_len; - int cmp = memcmp(a, b, len); - if (cmp) - return cmp; - return (a_len - b_len); -} - static int check_entry_match(const char *a, int a_len, const char *b, int b_len) { /* @@ -323,7 +314,6 @@ static inline int prune_traversal(struct name_entry *e, int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info) { - int ret = 0; int error = 0; struct name_entry *entry = xmalloc(n*sizeof(*entry)); int i; @@ -341,6 +331,7 @@ int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info) strbuf_setlen(&base, info->pathlen); } for (;;) { + int trees_used; unsigned long mask, dirmask; const char *first = NULL; int first_len = 0; @@ -404,15 +395,14 @@ int traverse_trees(int n, struct tree_desc *t, struct traverse_info *info) if (interesting < 0) break; if (interesting) { - ret = info->fn(n, mask, dirmask, entry, info); - if (ret < 0) { - error = ret; + trees_used = info->fn(n, mask, dirmask, entry, info); + if (trees_used < 0) { + error = trees_used; if (!info->show_all_errors) break; } - mask &= ret; + mask &= trees_used; } - ret = 0; for (i = 0; i < n; i++) if (mask & (1ul << i)) update_extended_entry(tx + i, entry + i); @@ -488,13 +478,25 @@ int get_tree_entry(const unsigned char *tree_sha1, const char *name, unsigned ch return retval; } -static int match_entry(const struct name_entry *entry, int pathlen, +static int match_entry(const struct pathspec_item *item, + const struct name_entry *entry, int pathlen, const char *match, int matchlen, - int *never_interesting) + enum interesting *never_interesting) { int m = -1; /* signals that we haven't called strncmp() */ - if (*never_interesting) { + if (item->magic & PATHSPEC_ICASE) + /* + * "Never interesting" trick requires exact + * matching. We could do something clever with inexact + * matching, but it's trickier (and not to forget that + * strcasecmp is locale-dependent, at least in + * glibc). Just disable it for now. It can't be worse + * than the wildcard's codepath of '[Tt][Hi][Is][Ss]' + * pattern. + */ + *never_interesting = entry_not_interesting; + else if (*never_interesting != entry_not_interesting) { /* * We have not seen any match that sorts later * than the current path. @@ -522,7 +524,7 @@ static int match_entry(const struct name_entry *entry, int pathlen, * the variable to -1 and that is what will be * returned, allowing the caller to terminate early. */ - *never_interesting = 0; + *never_interesting = entry_not_interesting; } if (pathlen > matchlen) @@ -531,7 +533,7 @@ static int match_entry(const struct name_entry *entry, int pathlen, if (matchlen > pathlen) { if (match[pathlen] != '/') return 0; - if (!S_ISDIR(entry->mode)) + if (!S_ISDIR(entry->mode) && !S_ISGITLINK(entry->mode)) return 0; } @@ -540,7 +542,7 @@ static int match_entry(const struct name_entry *entry, int pathlen, * we cheated and did not do strncmp(), so we do * that here. */ - m = strncmp(match, entry->path, pathlen); + m = ps_strncmp(item, match, entry->path, pathlen); /* * If common part matched earlier then it is a hit, @@ -548,15 +550,39 @@ static int match_entry(const struct name_entry *entry, int pathlen, * leading directory and is shorter than match. */ if (!m) + /* + * match_entry does not check if the prefix part is + * matched case-sensitively. If the entry is a + * directory and part of prefix, it'll be rematched + * eventually by basecmp with special treatment for + * the prefix. + */ return 1; return 0; } -static int match_dir_prefix(const char *base, +/* :(icase)-aware string compare */ +static int basecmp(const struct pathspec_item *item, + const char *base, const char *match, int len) +{ + if (item->magic & PATHSPEC_ICASE) { + int ret, n = len > item->prefix ? item->prefix : len; + ret = strncmp(base, match, n); + if (ret) + return ret; + base += n; + match += n; + len -= n; + } + return ps_strncmp(item, base, match, len); +} + +static int match_dir_prefix(const struct pathspec_item *item, + const char *base, const char *match, int matchlen) { - if (strncmp(base, match, matchlen)) + if (basecmp(item, base, match, matchlen)) return 0; /* @@ -573,22 +599,81 @@ static int match_dir_prefix(const char *base, } /* + * Perform matching on the leading non-wildcard part of + * pathspec. item->nowildcard_len must be greater than zero. Return + * non-zero if base is matched. + */ +static int match_wildcard_base(const struct pathspec_item *item, + const char *base, int baselen, + int *matched) +{ + const char *match = item->match; + /* the wildcard part is not considered in this function */ + int matchlen = item->nowildcard_len; + + if (baselen) { + int dirlen; + /* + * Return early if base is longer than the + * non-wildcard part but it does not match. + */ + if (baselen >= matchlen) { + *matched = matchlen; + return !basecmp(item, base, match, matchlen); + } + + dirlen = matchlen; + while (dirlen && match[dirlen - 1] != '/') + dirlen--; + + /* + * Return early if base is shorter than the + * non-wildcard part but it does not match. Note that + * base ends with '/' so we are sure it really matches + * directory + */ + if (basecmp(item, base, match, baselen)) + return 0; + *matched = baselen; + } else + *matched = 0; + /* + * we could have checked entry against the non-wildcard part + * that is not in base and does similar never_interesting + * optimization as in match_entry. For now just be happy with + * base comparison. + */ + return entry_interesting; +} + +/* * Is a tree entry interesting given the pathspec we have? * * Pre-condition: either baselen == base_offset (i.e. empty path) * or base[baselen-1] == '/' (i.e. with trailing slash). */ -enum interesting tree_entry_interesting(const struct name_entry *entry, - struct strbuf *base, int base_offset, - const struct pathspec *ps) +static enum interesting do_match(const struct name_entry *entry, + struct strbuf *base, int base_offset, + const struct pathspec *ps, + int exclude) { int i; int pathlen, baselen = base->len - base_offset; - int never_interesting = ps->has_wildcard ? + enum interesting never_interesting = ps->has_wildcard ? entry_not_interesting : all_entries_not_interesting; + GUARD_PATHSPEC(ps, + PATHSPEC_FROMTOP | + PATHSPEC_MAXDEPTH | + PATHSPEC_LITERAL | + PATHSPEC_GLOB | + PATHSPEC_ICASE | + PATHSPEC_EXCLUDE); + if (!ps->nr) { - if (!ps->recursive || ps->max_depth == -1) + if (!ps->recursive || + !(ps->magic & PATHSPEC_MAXDEPTH) || + ps->max_depth == -1) return all_entries_interesting; return within_depth(base->buf + base_offset, baselen, !!S_ISDIR(entry->mode), @@ -602,14 +687,20 @@ enum interesting tree_entry_interesting(const struct name_entry *entry, const struct pathspec_item *item = ps->items+i; const char *match = item->match; const char *base_str = base->buf + base_offset; - int matchlen = item->len; + int matchlen = item->len, matched = 0; + + if ((!exclude && item->magic & PATHSPEC_EXCLUDE) || + ( exclude && !(item->magic & PATHSPEC_EXCLUDE))) + continue; if (baselen >= matchlen) { /* If it doesn't match, move along... */ - if (!match_dir_prefix(base_str, match, matchlen)) + if (!match_dir_prefix(item, base_str, match, matchlen)) goto match_wildcards; - if (!ps->recursive || ps->max_depth == -1) + if (!ps->recursive || + !(ps->magic & PATHSPEC_MAXDEPTH) || + ps->max_depth == -1) return all_entries_interesting; return within_depth(base_str + matchlen + 1, @@ -620,14 +711,15 @@ enum interesting tree_entry_interesting(const struct name_entry *entry, } /* Either there must be no base, or the base must match. */ - if (baselen == 0 || !strncmp(base_str, match, baselen)) { - if (match_entry(entry, pathlen, + if (baselen == 0 || !basecmp(item, base_str, match, baselen)) { + if (match_entry(item, entry, pathlen, match + baselen, matchlen - baselen, &never_interesting)) return entry_interesting; - if (item->use_wildcard) { - if (!fnmatch(match + baselen, entry->path, 0)) + if (item->nowildcard_len < item->len) { + if (!git_fnmatch(item, match + baselen, entry->path, + item->nowildcard_len - baselen)) return entry_interesting; /* @@ -642,17 +734,33 @@ enum interesting tree_entry_interesting(const struct name_entry *entry, } match_wildcards: - if (!item->use_wildcard) + if (item->nowildcard_len == item->len) + continue; + + if (item->nowildcard_len && + !match_wildcard_base(item, base_str, baselen, &matched)) continue; /* * Concatenate base and entry->path into one and do * fnmatch() on it. + * + * While we could avoid concatenation in certain cases + * [1], which saves a memcpy and potentially a + * realloc, it turns out not worth it. Measurement on + * linux-2.6 does not show any clear improvements, + * partly because of the nowildcard_len optimization + * in git_fnmatch(). Avoid micro-optimizations here. + * + * [1] if match_wildcard_base() says the base + * directory is already matched, we only need to match + * the rest, which is shorter so _in theory_ faster. */ strbuf_add(base, entry->path, pathlen); - if (!fnmatch(match, base->buf + base_offset, 0)) { + if (!git_fnmatch(item, match, base->buf + base_offset, + item->nowildcard_len)) { strbuf_setlen(base, base_offset + baselen); return entry_interesting; } @@ -670,3 +778,72 @@ match_wildcards: } return never_interesting; /* No matches */ } + +/* + * Is a tree entry interesting given the pathspec we have? + * + * Pre-condition: either baselen == base_offset (i.e. empty path) + * or base[baselen-1] == '/' (i.e. with trailing slash). + */ +enum interesting tree_entry_interesting(const struct name_entry *entry, + struct strbuf *base, int base_offset, + const struct pathspec *ps) +{ + enum interesting positive, negative; + positive = do_match(entry, base, base_offset, ps, 0); + + /* + * case | entry | positive | negative | result + * -----+-------+----------+----------+------- + * 1 | file | -1 | -1..2 | -1 + * 2 | file | 0 | -1..2 | 0 + * 3 | file | 1 | -1 | 1 + * 4 | file | 1 | 0 | 1 + * 5 | file | 1 | 1 | 0 + * 6 | file | 1 | 2 | 0 + * 7 | file | 2 | -1 | 2 + * 8 | file | 2 | 0 | 2 + * 9 | file | 2 | 1 | 0 + * 10 | file | 2 | 2 | -1 + * -----+-------+----------+----------+------- + * 11 | dir | -1 | -1..2 | -1 + * 12 | dir | 0 | -1..2 | 0 + * 13 | dir | 1 | -1 | 1 + * 14 | dir | 1 | 0 | 1 + * 15 | dir | 1 | 1 | 1 (*) + * 16 | dir | 1 | 2 | 0 + * 17 | dir | 2 | -1 | 2 + * 18 | dir | 2 | 0 | 2 + * 19 | dir | 2 | 1 | 1 (*) + * 20 | dir | 2 | 2 | -1 + * + * (*) An exclude pattern interested in a directory does not + * necessarily mean it will exclude all of the directory. In + * wildcard case, it can't decide until looking at individual + * files inside. So don't write such directories off yet. + */ + + if (!(ps->magic & PATHSPEC_EXCLUDE) || + positive <= entry_not_interesting) /* #1, #2, #11, #12 */ + return positive; + + negative = do_match(entry, base, base_offset, ps, 1); + + /* #3, #4, #7, #8, #13, #14, #17, #18 */ + if (negative <= entry_not_interesting) + return positive; + + /* #15, #19 */ + if (S_ISDIR(entry->mode) && + positive >= entry_interesting && + negative == entry_interesting) + return entry_interesting; + + if ((positive == entry_interesting && + negative >= entry_interesting) || /* #5, #6, #16 */ + (positive == all_entries_interesting && + negative == entry_interesting)) /* #9 */ + return entry_not_interesting; + + return all_entries_not_interesting; /* #10, #20 */ +} |