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![Brandon Williams](/assets/img/avatar_default.png)
The old callchain used to take an array of attr_check_item items. Instead pass the 'attr_check' container object to 'collect_some_attrs()' and access the fields in the data structure directly. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
938 lines
23 KiB
C
938 lines
23 KiB
C
/*
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* Handle git attributes. See gitattributes(5) for a description of
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* the file syntax, and Documentation/technical/api-gitattributes.txt
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* for a description of the API.
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*
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* One basic design decision here is that we are not going to support
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* an insanely large number of attributes.
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*/
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#define NO_THE_INDEX_COMPATIBILITY_MACROS
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#include "cache.h"
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#include "exec_cmd.h"
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#include "attr.h"
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#include "dir.h"
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#include "utf8.h"
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#include "quote.h"
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const char git_attr__true[] = "(builtin)true";
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const char git_attr__false[] = "\0(builtin)false";
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static const char git_attr__unknown[] = "(builtin)unknown";
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#define ATTR__TRUE git_attr__true
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#define ATTR__FALSE git_attr__false
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#define ATTR__UNSET NULL
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#define ATTR__UNKNOWN git_attr__unknown
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/* This is a randomly chosen prime. */
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#define HASHSIZE 257
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#ifndef DEBUG_ATTR
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#define DEBUG_ATTR 0
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#endif
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/*
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* NEEDSWORK: the global dictionary of the interned attributes
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* must stay a singleton even after we become thread-ready.
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* Access to these must be surrounded with mutex when it happens.
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*/
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struct git_attr {
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struct git_attr *next;
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unsigned h;
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int attr_nr;
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int maybe_macro;
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int maybe_real;
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char name[FLEX_ARRAY];
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};
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static int attr_nr;
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static struct git_attr *(git_attr_hash[HASHSIZE]);
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/*
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* NEEDSWORK: maybe-real, maybe-macro are not property of
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* an attribute, as it depends on what .gitattributes are
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* read. Once we introduce per git_attr_check attr_stack
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* and check_all_attr, the optimization based on them will
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* become unnecessary and can go away. So is this variable.
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*/
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static int cannot_trust_maybe_real;
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/* NEEDSWORK: This will become per git_attr_check */
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static struct attr_check_item *check_all_attr;
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const char *git_attr_name(const struct git_attr *attr)
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{
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return attr->name;
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}
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static unsigned hash_name(const char *name, int namelen)
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{
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unsigned val = 0, c;
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while (namelen--) {
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c = *name++;
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val = ((val << 7) | (val >> 22)) ^ c;
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}
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return val;
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}
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static int invalid_attr_name(const char *name, int namelen)
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{
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/*
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* Attribute name cannot begin with '-' and must consist of
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* characters from [-A-Za-z0-9_.].
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*/
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if (namelen <= 0 || *name == '-')
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return -1;
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while (namelen--) {
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char ch = *name++;
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if (! (ch == '-' || ch == '.' || ch == '_' ||
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('0' <= ch && ch <= '9') ||
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('a' <= ch && ch <= 'z') ||
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('A' <= ch && ch <= 'Z')) )
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return -1;
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}
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return 0;
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}
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static struct git_attr *git_attr_internal(const char *name, int len)
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{
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unsigned hval = hash_name(name, len);
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unsigned pos = hval % HASHSIZE;
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struct git_attr *a;
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for (a = git_attr_hash[pos]; a; a = a->next) {
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if (a->h == hval &&
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!memcmp(a->name, name, len) && !a->name[len])
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return a;
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}
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if (invalid_attr_name(name, len))
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return NULL;
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FLEX_ALLOC_MEM(a, name, name, len);
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a->h = hval;
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a->next = git_attr_hash[pos];
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a->attr_nr = attr_nr++;
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a->maybe_macro = 0;
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a->maybe_real = 0;
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git_attr_hash[pos] = a;
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/*
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* NEEDSWORK: per git_attr_check check_all_attr
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* will be initialized a lot more lazily, not
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* like this, and not here.
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*/
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REALLOC_ARRAY(check_all_attr, attr_nr);
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check_all_attr[a->attr_nr].attr = a;
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check_all_attr[a->attr_nr].value = ATTR__UNKNOWN;
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return a;
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}
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struct git_attr *git_attr(const char *name)
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{
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return git_attr_internal(name, strlen(name));
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}
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/* What does a matched pattern decide? */
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struct attr_state {
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struct git_attr *attr;
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const char *setto;
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};
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struct pattern {
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const char *pattern;
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int patternlen;
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int nowildcardlen;
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unsigned flags; /* EXC_FLAG_* */
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};
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/*
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* One rule, as from a .gitattributes file.
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*
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* If is_macro is true, then u.attr is a pointer to the git_attr being
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* defined.
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*
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* If is_macro is false, then u.pat is the filename pattern to which the
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* rule applies.
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*
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* In either case, num_attr is the number of attributes affected by
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* this rule, and state is an array listing them. The attributes are
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* listed as they appear in the file (macros unexpanded).
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*/
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struct match_attr {
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union {
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struct pattern pat;
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struct git_attr *attr;
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} u;
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char is_macro;
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unsigned num_attr;
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struct attr_state state[FLEX_ARRAY];
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};
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static const char blank[] = " \t\r\n";
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/*
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* Parse a whitespace-delimited attribute state (i.e., "attr",
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* "-attr", "!attr", or "attr=value") from the string starting at src.
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* If e is not NULL, write the results to *e. Return a pointer to the
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* remainder of the string (with leading whitespace removed), or NULL
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* if there was an error.
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*/
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static const char *parse_attr(const char *src, int lineno, const char *cp,
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struct attr_state *e)
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{
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const char *ep, *equals;
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int len;
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ep = cp + strcspn(cp, blank);
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equals = strchr(cp, '=');
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if (equals && ep < equals)
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equals = NULL;
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if (equals)
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len = equals - cp;
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else
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len = ep - cp;
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if (!e) {
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if (*cp == '-' || *cp == '!') {
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cp++;
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len--;
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}
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if (invalid_attr_name(cp, len)) {
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fprintf(stderr,
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"%.*s is not a valid attribute name: %s:%d\n",
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len, cp, src, lineno);
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return NULL;
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}
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} else {
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/*
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* As this function is always called twice, once with
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* e == NULL in the first pass and then e != NULL in
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* the second pass, no need for invalid_attr_name()
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* check here.
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*/
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if (*cp == '-' || *cp == '!') {
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e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;
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cp++;
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len--;
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}
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else if (!equals)
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e->setto = ATTR__TRUE;
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else {
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e->setto = xmemdupz(equals + 1, ep - equals - 1);
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}
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e->attr = git_attr_internal(cp, len);
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}
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return ep + strspn(ep, blank);
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}
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static struct match_attr *parse_attr_line(const char *line, const char *src,
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int lineno, int macro_ok)
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{
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int namelen;
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int num_attr, i;
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const char *cp, *name, *states;
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struct match_attr *res = NULL;
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int is_macro;
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struct strbuf pattern = STRBUF_INIT;
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cp = line + strspn(line, blank);
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if (!*cp || *cp == '#')
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return NULL;
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name = cp;
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if (*cp == '"' && !unquote_c_style(&pattern, name, &states)) {
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name = pattern.buf;
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namelen = pattern.len;
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} else {
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namelen = strcspn(name, blank);
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states = name + namelen;
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}
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if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
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starts_with(name, ATTRIBUTE_MACRO_PREFIX)) {
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if (!macro_ok) {
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fprintf(stderr, "%s not allowed: %s:%d\n",
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name, src, lineno);
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goto fail_return;
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}
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is_macro = 1;
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name += strlen(ATTRIBUTE_MACRO_PREFIX);
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name += strspn(name, blank);
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namelen = strcspn(name, blank);
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if (invalid_attr_name(name, namelen)) {
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fprintf(stderr,
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"%.*s is not a valid attribute name: %s:%d\n",
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namelen, name, src, lineno);
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goto fail_return;
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}
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}
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else
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is_macro = 0;
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states += strspn(states, blank);
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/* First pass to count the attr_states */
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for (cp = states, num_attr = 0; *cp; num_attr++) {
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cp = parse_attr(src, lineno, cp, NULL);
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if (!cp)
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goto fail_return;
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}
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res = xcalloc(1,
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sizeof(*res) +
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sizeof(struct attr_state) * num_attr +
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(is_macro ? 0 : namelen + 1));
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if (is_macro) {
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res->u.attr = git_attr_internal(name, namelen);
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res->u.attr->maybe_macro = 1;
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} else {
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char *p = (char *)&(res->state[num_attr]);
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memcpy(p, name, namelen);
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res->u.pat.pattern = p;
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parse_exclude_pattern(&res->u.pat.pattern,
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&res->u.pat.patternlen,
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&res->u.pat.flags,
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&res->u.pat.nowildcardlen);
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if (res->u.pat.flags & EXC_FLAG_NEGATIVE) {
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warning(_("Negative patterns are ignored in git attributes\n"
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"Use '\\!' for literal leading exclamation."));
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goto fail_return;
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}
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}
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res->is_macro = is_macro;
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res->num_attr = num_attr;
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/* Second pass to fill the attr_states */
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for (cp = states, i = 0; *cp; i++) {
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cp = parse_attr(src, lineno, cp, &(res->state[i]));
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if (!is_macro)
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res->state[i].attr->maybe_real = 1;
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if (res->state[i].attr->maybe_macro)
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cannot_trust_maybe_real = 1;
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}
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strbuf_release(&pattern);
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return res;
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fail_return:
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strbuf_release(&pattern);
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free(res);
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return NULL;
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}
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/*
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* Like info/exclude and .gitignore, the attribute information can
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* come from many places.
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*
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* (1) .gitattribute file of the same directory;
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* (2) .gitattribute file of the parent directory if (1) does not have
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* any match; this goes recursively upwards, just like .gitignore.
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* (3) $GIT_DIR/info/attributes, which overrides both of the above.
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*
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* In the same file, later entries override the earlier match, so in the
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* global list, we would have entries from info/attributes the earliest
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* (reading the file from top to bottom), .gitattribute of the root
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* directory (again, reading the file from top to bottom) down to the
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* current directory, and then scan the list backwards to find the first match.
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* This is exactly the same as what is_excluded() does in dir.c to deal with
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* .gitignore file and info/excludes file as a fallback.
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*/
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/* NEEDSWORK: This will become per git_attr_check */
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static struct attr_stack {
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struct attr_stack *prev;
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char *origin;
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size_t originlen;
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unsigned num_matches;
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unsigned alloc;
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struct match_attr **attrs;
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} *attr_stack;
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static void free_attr_elem(struct attr_stack *e)
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{
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int i;
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free(e->origin);
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for (i = 0; i < e->num_matches; i++) {
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struct match_attr *a = e->attrs[i];
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int j;
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for (j = 0; j < a->num_attr; j++) {
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const char *setto = a->state[j].setto;
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if (setto == ATTR__TRUE ||
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setto == ATTR__FALSE ||
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setto == ATTR__UNSET ||
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setto == ATTR__UNKNOWN)
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;
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else
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free((char *) setto);
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}
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free(a);
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}
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free(e->attrs);
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free(e);
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}
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struct attr_check *attr_check_alloc(void)
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{
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return xcalloc(1, sizeof(struct attr_check));
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}
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struct attr_check *attr_check_initl(const char *one, ...)
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{
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struct attr_check *check;
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int cnt;
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va_list params;
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const char *param;
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va_start(params, one);
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for (cnt = 1; (param = va_arg(params, const char *)) != NULL; cnt++)
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;
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va_end(params);
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check = attr_check_alloc();
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check->nr = cnt;
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check->alloc = cnt;
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check->items = xcalloc(cnt, sizeof(struct attr_check_item));
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check->items[0].attr = git_attr(one);
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va_start(params, one);
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for (cnt = 1; cnt < check->nr; cnt++) {
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const struct git_attr *attr;
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param = va_arg(params, const char *);
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if (!param)
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die("BUG: counted %d != ended at %d",
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check->nr, cnt);
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attr = git_attr(param);
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if (!attr)
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die("BUG: %s: not a valid attribute name", param);
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check->items[cnt].attr = attr;
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}
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va_end(params);
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return check;
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}
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struct attr_check_item *attr_check_append(struct attr_check *check,
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const struct git_attr *attr)
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{
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struct attr_check_item *item;
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ALLOC_GROW(check->items, check->nr + 1, check->alloc);
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item = &check->items[check->nr++];
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item->attr = attr;
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return item;
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}
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void attr_check_reset(struct attr_check *check)
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{
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check->nr = 0;
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}
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void attr_check_clear(struct attr_check *check)
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{
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free(check->items);
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check->items = NULL;
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check->alloc = 0;
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check->nr = 0;
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}
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void attr_check_free(struct attr_check *check)
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{
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attr_check_clear(check);
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free(check);
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}
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static const char *builtin_attr[] = {
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"[attr]binary -diff -merge -text",
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NULL,
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};
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static void handle_attr_line(struct attr_stack *res,
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const char *line,
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const char *src,
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int lineno,
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int macro_ok)
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{
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struct match_attr *a;
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a = parse_attr_line(line, src, lineno, macro_ok);
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if (!a)
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return;
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ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc);
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res->attrs[res->num_matches++] = a;
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}
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|
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static struct attr_stack *read_attr_from_array(const char **list)
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{
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struct attr_stack *res;
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const char *line;
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int lineno = 0;
|
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|
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res = xcalloc(1, sizeof(*res));
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while ((line = *(list++)) != NULL)
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handle_attr_line(res, line, "[builtin]", ++lineno, 1);
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return res;
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}
|
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|
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/*
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* NEEDSWORK: these two are tricky. The callers assume there is a
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* single, system-wide global state "where we read attributes from?"
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* and when the state is flipped by calling git_attr_set_direction(),
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* attr_stack is discarded so that subsequent attr_check will lazily
|
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* read from the right place. And they do not know or care who called
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* by them uses the attribute subsystem, hence have no knowledge of
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* existing git_attr_check instances or future ones that will be
|
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* created).
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*
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* Probably we need a thread_local that holds these two variables,
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* and a list of git_attr_check instances (which need to be maintained
|
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* by hooking into git_attr_check_alloc(), git_attr_check_initl(), and
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* git_attr_check_clear(). Then git_attr_set_direction() updates the
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|
* fields in that thread_local for these two variables, iterate over
|
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* all the active git_attr_check instances and discard the attr_stack
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* they hold. Yuck, but it sounds doable.
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*/
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static enum git_attr_direction direction;
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static struct index_state *use_index;
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|
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static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
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|
{
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FILE *fp = fopen(path, "r");
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struct attr_stack *res;
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char buf[2048];
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int lineno = 0;
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|
|
|
if (!fp) {
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|
if (errno != ENOENT && errno != ENOTDIR)
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warn_on_inaccessible(path);
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return NULL;
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}
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res = xcalloc(1, sizeof(*res));
|
|
while (fgets(buf, sizeof(buf), fp)) {
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char *bufp = buf;
|
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if (!lineno)
|
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skip_utf8_bom(&bufp, strlen(bufp));
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handle_attr_line(res, bufp, path, ++lineno, macro_ok);
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}
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fclose(fp);
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return res;
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}
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|
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static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
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|
{
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struct attr_stack *res;
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char *buf, *sp;
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int lineno = 0;
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|
|
buf = read_blob_data_from_index(use_index ? use_index : &the_index, path, NULL);
|
|
if (!buf)
|
|
return NULL;
|
|
|
|
res = xcalloc(1, sizeof(*res));
|
|
for (sp = buf; *sp; ) {
|
|
char *ep;
|
|
int more;
|
|
|
|
ep = strchrnul(sp, '\n');
|
|
more = (*ep == '\n');
|
|
*ep = '\0';
|
|
handle_attr_line(res, sp, path, ++lineno, macro_ok);
|
|
sp = ep + more;
|
|
}
|
|
free(buf);
|
|
return res;
|
|
}
|
|
|
|
static struct attr_stack *read_attr(const char *path, int macro_ok)
|
|
{
|
|
struct attr_stack *res;
|
|
|
|
if (direction == GIT_ATTR_CHECKOUT) {
|
|
res = read_attr_from_index(path, macro_ok);
|
|
if (!res)
|
|
res = read_attr_from_file(path, macro_ok);
|
|
}
|
|
else if (direction == GIT_ATTR_CHECKIN) {
|
|
res = read_attr_from_file(path, macro_ok);
|
|
if (!res)
|
|
/*
|
|
* There is no checked out .gitattributes file there, but
|
|
* we might have it in the index. We allow operation in a
|
|
* sparsely checked out work tree, so read from it.
|
|
*/
|
|
res = read_attr_from_index(path, macro_ok);
|
|
}
|
|
else
|
|
res = read_attr_from_index(path, macro_ok);
|
|
if (!res)
|
|
res = xcalloc(1, sizeof(*res));
|
|
return res;
|
|
}
|
|
|
|
#if DEBUG_ATTR
|
|
static void debug_info(const char *what, struct attr_stack *elem)
|
|
{
|
|
fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()");
|
|
}
|
|
static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v)
|
|
{
|
|
const char *value = v;
|
|
|
|
if (ATTR_TRUE(value))
|
|
value = "set";
|
|
else if (ATTR_FALSE(value))
|
|
value = "unset";
|
|
else if (ATTR_UNSET(value))
|
|
value = "unspecified";
|
|
|
|
fprintf(stderr, "%s: %s => %s (%s)\n",
|
|
what, attr->name, (char *) value, match);
|
|
}
|
|
#define debug_push(a) debug_info("push", (a))
|
|
#define debug_pop(a) debug_info("pop", (a))
|
|
#else
|
|
#define debug_push(a) do { ; } while (0)
|
|
#define debug_pop(a) do { ; } while (0)
|
|
#define debug_set(a,b,c,d) do { ; } while (0)
|
|
#endif /* DEBUG_ATTR */
|
|
|
|
static void drop_attr_stack(void)
|
|
{
|
|
while (attr_stack) {
|
|
struct attr_stack *elem = attr_stack;
|
|
attr_stack = elem->prev;
|
|
free_attr_elem(elem);
|
|
}
|
|
}
|
|
|
|
static const char *git_etc_gitattributes(void)
|
|
{
|
|
static const char *system_wide;
|
|
if (!system_wide)
|
|
system_wide = system_path(ETC_GITATTRIBUTES);
|
|
return system_wide;
|
|
}
|
|
|
|
static int git_attr_system(void)
|
|
{
|
|
return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
|
|
}
|
|
|
|
static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE)
|
|
|
|
static void push_stack(struct attr_stack **attr_stack_p,
|
|
struct attr_stack *elem, char *origin, size_t originlen)
|
|
{
|
|
if (elem) {
|
|
elem->origin = origin;
|
|
if (origin)
|
|
elem->originlen = originlen;
|
|
elem->prev = *attr_stack_p;
|
|
*attr_stack_p = elem;
|
|
}
|
|
}
|
|
|
|
static void bootstrap_attr_stack(void)
|
|
{
|
|
struct attr_stack *elem;
|
|
|
|
if (attr_stack)
|
|
return;
|
|
|
|
push_stack(&attr_stack, read_attr_from_array(builtin_attr), NULL, 0);
|
|
|
|
if (git_attr_system())
|
|
push_stack(&attr_stack,
|
|
read_attr_from_file(git_etc_gitattributes(), 1),
|
|
NULL, 0);
|
|
|
|
if (!git_attributes_file)
|
|
git_attributes_file = xdg_config_home("attributes");
|
|
if (git_attributes_file)
|
|
push_stack(&attr_stack,
|
|
read_attr_from_file(git_attributes_file, 1),
|
|
NULL, 0);
|
|
|
|
if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
|
|
elem = read_attr(GITATTRIBUTES_FILE, 1);
|
|
push_stack(&attr_stack, elem, xstrdup(""), 0);
|
|
debug_push(elem);
|
|
}
|
|
|
|
if (startup_info->have_repository)
|
|
elem = read_attr_from_file(git_path_info_attributes(), 1);
|
|
else
|
|
elem = NULL;
|
|
|
|
if (!elem)
|
|
elem = xcalloc(1, sizeof(*elem));
|
|
push_stack(&attr_stack, elem, NULL, 0);
|
|
}
|
|
|
|
static void prepare_attr_stack(const char *path, int dirlen)
|
|
{
|
|
struct attr_stack *elem, *info;
|
|
const char *cp;
|
|
|
|
/*
|
|
* At the bottom of the attribute stack is the built-in
|
|
* set of attribute definitions, followed by the contents
|
|
* of $(prefix)/etc/gitattributes and a file specified by
|
|
* core.attributesfile. Then, contents from
|
|
* .gitattribute files from directories closer to the
|
|
* root to the ones in deeper directories are pushed
|
|
* to the stack. Finally, at the very top of the stack
|
|
* we always keep the contents of $GIT_DIR/info/attributes.
|
|
*
|
|
* When checking, we use entries from near the top of the
|
|
* stack, preferring $GIT_DIR/info/attributes, then
|
|
* .gitattributes in deeper directories to shallower ones,
|
|
* and finally use the built-in set as the default.
|
|
*/
|
|
bootstrap_attr_stack();
|
|
|
|
/*
|
|
* Pop the "info" one that is always at the top of the stack.
|
|
*/
|
|
info = attr_stack;
|
|
attr_stack = info->prev;
|
|
|
|
/*
|
|
* Pop the ones from directories that are not the prefix of
|
|
* the path we are checking. Break out of the loop when we see
|
|
* the root one (whose origin is an empty string "") or the builtin
|
|
* one (whose origin is NULL) without popping it.
|
|
*/
|
|
while (attr_stack->origin) {
|
|
int namelen = strlen(attr_stack->origin);
|
|
|
|
elem = attr_stack;
|
|
if (namelen <= dirlen &&
|
|
!strncmp(elem->origin, path, namelen) &&
|
|
(!namelen || path[namelen] == '/'))
|
|
break;
|
|
|
|
debug_pop(elem);
|
|
attr_stack = elem->prev;
|
|
free_attr_elem(elem);
|
|
}
|
|
|
|
/*
|
|
* Read from parent directories and push them down
|
|
*/
|
|
if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
|
|
/*
|
|
* bootstrap_attr_stack() should have added, and the
|
|
* above loop should have stopped before popping, the
|
|
* root element whose attr_stack->origin is set to an
|
|
* empty string.
|
|
*/
|
|
struct strbuf pathbuf = STRBUF_INIT;
|
|
|
|
assert(attr_stack->origin);
|
|
while (1) {
|
|
size_t len = strlen(attr_stack->origin);
|
|
char *origin;
|
|
|
|
if (dirlen <= len)
|
|
break;
|
|
cp = memchr(path + len + 1, '/', dirlen - len - 1);
|
|
if (!cp)
|
|
cp = path + dirlen;
|
|
strbuf_addf(&pathbuf,
|
|
"%.*s/%s", (int)(cp - path), path,
|
|
GITATTRIBUTES_FILE);
|
|
elem = read_attr(pathbuf.buf, 0);
|
|
strbuf_setlen(&pathbuf, cp - path);
|
|
origin = strbuf_detach(&pathbuf, &len);
|
|
push_stack(&attr_stack, elem, origin, len);
|
|
debug_push(elem);
|
|
}
|
|
|
|
strbuf_release(&pathbuf);
|
|
}
|
|
|
|
/*
|
|
* Finally push the "info" one at the top of the stack.
|
|
*/
|
|
push_stack(&attr_stack, info, NULL, 0);
|
|
}
|
|
|
|
static int path_matches(const char *pathname, int pathlen,
|
|
int basename_offset,
|
|
const struct pattern *pat,
|
|
const char *base, int baselen)
|
|
{
|
|
const char *pattern = pat->pattern;
|
|
int prefix = pat->nowildcardlen;
|
|
int isdir = (pathlen && pathname[pathlen - 1] == '/');
|
|
|
|
if ((pat->flags & EXC_FLAG_MUSTBEDIR) && !isdir)
|
|
return 0;
|
|
|
|
if (pat->flags & EXC_FLAG_NODIR) {
|
|
return match_basename(pathname + basename_offset,
|
|
pathlen - basename_offset - isdir,
|
|
pattern, prefix,
|
|
pat->patternlen, pat->flags);
|
|
}
|
|
return match_pathname(pathname, pathlen - isdir,
|
|
base, baselen,
|
|
pattern, prefix, pat->patternlen, pat->flags);
|
|
}
|
|
|
|
static int macroexpand_one(int attr_nr, int rem);
|
|
|
|
static int fill_one(const char *what, struct match_attr *a, int rem)
|
|
{
|
|
struct attr_check_item *check = check_all_attr;
|
|
int i;
|
|
|
|
for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) {
|
|
struct git_attr *attr = a->state[i].attr;
|
|
const char **n = &(check[attr->attr_nr].value);
|
|
const char *v = a->state[i].setto;
|
|
|
|
if (*n == ATTR__UNKNOWN) {
|
|
debug_set(what,
|
|
a->is_macro ? a->u.attr->name : a->u.pat.pattern,
|
|
attr, v);
|
|
*n = v;
|
|
rem--;
|
|
rem = macroexpand_one(attr->attr_nr, rem);
|
|
}
|
|
}
|
|
return rem;
|
|
}
|
|
|
|
static int fill(const char *path, int pathlen, int basename_offset,
|
|
struct attr_stack *stk, int rem)
|
|
{
|
|
int i;
|
|
const char *base = stk->origin ? stk->origin : "";
|
|
|
|
for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) {
|
|
struct match_attr *a = stk->attrs[i];
|
|
if (a->is_macro)
|
|
continue;
|
|
if (path_matches(path, pathlen, basename_offset,
|
|
&a->u.pat, base, stk->originlen))
|
|
rem = fill_one("fill", a, rem);
|
|
}
|
|
return rem;
|
|
}
|
|
|
|
static int macroexpand_one(int nr, int rem)
|
|
{
|
|
struct attr_stack *stk;
|
|
int i;
|
|
|
|
if (check_all_attr[nr].value != ATTR__TRUE ||
|
|
!check_all_attr[nr].attr->maybe_macro)
|
|
return rem;
|
|
|
|
for (stk = attr_stack; stk; stk = stk->prev) {
|
|
for (i = stk->num_matches - 1; 0 <= i; i--) {
|
|
struct match_attr *ma = stk->attrs[i];
|
|
if (!ma->is_macro)
|
|
continue;
|
|
if (ma->u.attr->attr_nr == nr)
|
|
return fill_one("expand", ma, rem);
|
|
}
|
|
}
|
|
|
|
return rem;
|
|
}
|
|
|
|
/*
|
|
* Collect attributes for path into the array pointed to by
|
|
* check_all_attr. If num is non-zero, only attributes in check[] are
|
|
* collected. Otherwise all attributes are collected.
|
|
*/
|
|
static void collect_some_attrs(const char *path, struct attr_check *check)
|
|
{
|
|
struct attr_stack *stk;
|
|
int i, pathlen, rem, dirlen;
|
|
const char *cp, *last_slash = NULL;
|
|
int basename_offset;
|
|
|
|
for (cp = path; *cp; cp++) {
|
|
if (*cp == '/' && cp[1])
|
|
last_slash = cp;
|
|
}
|
|
pathlen = cp - path;
|
|
if (last_slash) {
|
|
basename_offset = last_slash + 1 - path;
|
|
dirlen = last_slash - path;
|
|
} else {
|
|
basename_offset = 0;
|
|
dirlen = 0;
|
|
}
|
|
|
|
prepare_attr_stack(path, dirlen);
|
|
for (i = 0; i < attr_nr; i++)
|
|
check_all_attr[i].value = ATTR__UNKNOWN;
|
|
if (check->nr && !cannot_trust_maybe_real) {
|
|
rem = 0;
|
|
for (i = 0; i < check->nr; i++) {
|
|
const struct git_attr *a = check->items[i].attr;
|
|
if (!a->maybe_real) {
|
|
struct attr_check_item *c;
|
|
c = check_all_attr + a->attr_nr;
|
|
c->value = ATTR__UNSET;
|
|
rem++;
|
|
}
|
|
}
|
|
if (rem == check->nr)
|
|
return;
|
|
}
|
|
|
|
rem = attr_nr;
|
|
for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
|
|
rem = fill(path, pathlen, basename_offset, stk, rem);
|
|
}
|
|
|
|
int git_check_attr(const char *path, struct attr_check *check)
|
|
{
|
|
int i;
|
|
|
|
collect_some_attrs(path, check);
|
|
|
|
for (i = 0; i < check->nr; i++) {
|
|
const char *value = check_all_attr[check->items[i].attr->attr_nr].value;
|
|
if (value == ATTR__UNKNOWN)
|
|
value = ATTR__UNSET;
|
|
check->items[i].value = value;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void git_all_attrs(const char *path, struct attr_check *check)
|
|
{
|
|
int i;
|
|
|
|
attr_check_reset(check);
|
|
collect_some_attrs(path, check);
|
|
|
|
for (i = 0; i < attr_nr; i++) {
|
|
const char *name = check_all_attr[i].attr->name;
|
|
const char *value = check_all_attr[i].value;
|
|
struct attr_check_item *item;
|
|
if (value == ATTR__UNSET || value == ATTR__UNKNOWN)
|
|
continue;
|
|
item = attr_check_append(check, git_attr(name));
|
|
item->value = value;
|
|
}
|
|
}
|
|
|
|
void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate)
|
|
{
|
|
enum git_attr_direction old = direction;
|
|
|
|
if (is_bare_repository() && new != GIT_ATTR_INDEX)
|
|
die("BUG: non-INDEX attr direction in a bare repo");
|
|
|
|
direction = new;
|
|
if (new != old)
|
|
drop_attr_stack();
|
|
use_index = istate;
|
|
}
|