diff options
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Documentation/git-for-each-ref.txt | 164 | ||||
| -rw-r--r-- | Makefile | 1 | ||||
| -rw-r--r-- | builtin-for-each-ref.c | 874 | ||||
| -rw-r--r-- | builtin.h | 3 | ||||
| -rw-r--r-- | git.c | 1 | ||||
| -rw-r--r-- | object.c | 68 | ||||
| -rw-r--r-- | object.h | 6 | ||||
| -rw-r--r-- | quote.c | 38 | ||||
| -rw-r--r-- | quote.h | 4 |
10 files changed, 1132 insertions, 28 deletions
diff --git a/.gitignore b/.gitignore index 0d608fe12a..0b08f37622 100644 --- a/.gitignore +++ b/.gitignore @@ -36,6 +36,7 @@ git-fetch git-fetch-pack git-findtags git-fmt-merge-msg +git-for-each-ref git-format-patch git-fsck-objects git-get-tar-commit-id diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt new file mode 100644 index 0000000000..6649f795e8 --- /dev/null +++ b/Documentation/git-for-each-ref.txt @@ -0,0 +1,164 @@ +git-for-each-ref(1) +=================== + +NAME +---- +git-for-each-ref - Output information on each ref + +SYNOPSIS +-------- +'git-for-each-ref' [--count=<count>]* [--shell|--perl|--python] [--sort=<key>]* [--format=<format>] [<pattern>] + +DESCRIPTION +----------- + +Iterate over all refs that match `<pattern>` and show them +according to the given `<format>`, after sorting them according +to the given set of `<key>`s. If `<max>` is given, stop after +showing that many refs. The interporated values in `<format>` +can optionally be quoted as string literals in the specified +host language. + +OPTIONS +------- +<count>:: + By default the command shows all refs that match + `<pattern>`. This option makes it stop after showing + that many refs. + +<key>:: + A field name to sort on. Prefix `-` to sort in + descending order of the value. When unspecified, + `refname` is used. More than one sort keys can be + given. + +<format>:: + A string that interpolates `%(fieldname)` from the + object pointed at by a ref being shown. If `fieldname` + is prefixed with an asterisk (`*`) and the ref points + at a tag object, the value for the field in the object + tag refers is used. When unspecified, defaults to + `%(refname)`. + +<pattern>:: + If given, the name of the ref is matched against this + using fnmatch(3). Refs that do not match the pattern + are not shown. + +--shell, --perl, --python:: + If given, strings that substitute `%(fieldname)` + placeholders are quoted as string literals suitable for + the specified host language. This is meant to produce + a scriptlet that can directly be `eval`ed. + + +FIELD NAMES +----------- + +Various values from structured fields in referenced objects can +be used to interpolate into the resulting output, or as sort +keys. + +For all objects, the following names can be used: + +refname:: + The name of the ref (the part after $GIT_DIR/refs/). + +objecttype:: + The type of the object (`blob`, `tree`, `commit`, `tag`). + +objectsize:: + The size of the object (the same as `git-cat-file -s` reports). + +objectname:: + The object name (aka SHA-1). + +In addition to the above, for commit and tag objects, the header +field names (`tree`, `parent`, `object`, `type`, and `tag`) can +be used to specify the value in the header field. + +Fields that have name-email-date tuple as its value (`author`, +`committer`, and `tagger`) can be suffixed with `name`, `email`, +and `date` to extract the named component. + +The first line of the message in a commit and tag object is +`subject`, the remaining lines are `body`. The whole message +is `contents`. + +For sorting purposes, fields with numeric values sort in numeric +order (`objectsize`, `authordate`, `committerdate`, `taggerdate`). +All other fields are used to sort in their byte-value order. + +In any case, a field name that refers to a field inapplicable to +the object referred by the ref does not cause an error. It +returns an empty string instead. + + +EXAMPLES +-------- + +Show the most recent 3 tagged commits:: + +------------ +#!/bin/sh + +git-for-each-ref --count=3 --sort='-*authordate' \ +--format='From: %(*authorname) %(*authoremail) +Subject: %(*subject) +Date: %(*authordate) +Ref: %(*refname) + +%(*body) +' 'refs/tags' +------------ + +A bit more elaborate report on tags:: +------------ +#!/bin/sh + +fmt=' + r=%(refname) + t=%(*objecttype) + T=${r#refs/tags/} + + o=%(*objectname) + n=%(*authorname) + e=%(*authoremail) + s=%(*subject) + d=%(*authordate) + b=%(*body) + + kind=Tag + if test "z$t" = z + then + # could be a lightweight tag + t=%(objecttype) + kind="Lightweight tag" + o=%(objectname) + n=%(authorname) + e=%(authoremail) + s=%(subject) + d=%(authordate) + b=%(body) + fi + echo "$kind $T points at a $t object $o" + if test "z$t" = zcommit + then + echo "The commit was authored by $n $e +at $d, and titled + + $s + +Its message reads as: +" + echo "$b" | sed -e "s/^/ /" + echo + fi +' + +eval=`git-for-each-ref -s --format="$fmt" \ + --sort='*objecttype' \ + --sort=-taggerdate \ + refs/tags` +eval "$eval" +------------ @@ -267,6 +267,7 @@ BUILTIN_OBJS = \ builtin-diff-stages.o \ builtin-diff-tree.o \ builtin-fmt-merge-msg.o \ + builtin-for-each-ref.o \ builtin-grep.o \ builtin-init-db.o \ builtin-log.o \ diff --git a/builtin-for-each-ref.c b/builtin-for-each-ref.c new file mode 100644 index 0000000000..698618b798 --- /dev/null +++ b/builtin-for-each-ref.c @@ -0,0 +1,874 @@ +#include "cache.h" +#include "refs.h" +#include "object.h" +#include "tag.h" +#include "commit.h" +#include "tree.h" +#include "blob.h" +#include "quote.h" +#include <fnmatch.h> + +/* Quoting styles */ +#define QUOTE_NONE 0 +#define QUOTE_SHELL 1 +#define QUOTE_PERL 2 +#define QUOTE_PYTHON 3 + +typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type; + +struct atom_value { + const char *s; + unsigned long ul; /* used for sorting when not FIELD_STR */ +}; + +struct ref_sort { + struct ref_sort *next; + int atom; /* index into used_atom array */ + unsigned reverse : 1; +}; + +struct refinfo { + char *refname; + unsigned char objectname[20]; + struct atom_value *value; +}; + +static struct { + const char *name; + cmp_type cmp_type; +} valid_atom[] = { + { "refname" }, + { "objecttype" }, + { "objectsize", FIELD_ULONG }, + { "objectname" }, + { "tree" }, + { "parent" }, /* NEEDSWORK: how to address 2nd and later parents? */ + { "numparent", FIELD_ULONG }, + { "object" }, + { "type" }, + { "tag" }, + { "author" }, + { "authorname" }, + { "authoremail" }, + { "authordate", FIELD_TIME }, + { "committer" }, + { "committername" }, + { "committeremail" }, + { "committerdate", FIELD_TIME }, + { "tagger" }, + { "taggername" }, + { "taggeremail" }, + { "taggerdate", FIELD_TIME }, + { "subject" }, + { "body" }, + { "contents" }, +}; + +/* + * An atom is a valid field atom listed above, possibly prefixed with + * a "*" to denote deref_tag(). + * + * We parse given format string and sort specifiers, and make a list + * of properties that we need to extract out of objects. refinfo + * structure will hold an array of values extracted that can be + * indexed with the "atom number", which is an index into this + * array. + */ +static const char **used_atom; +static cmp_type *used_atom_type; +static int used_atom_cnt, sort_atom_limit, need_tagged; + +/* + * Used to parse format string and sort specifiers + */ +static int parse_atom(const char *atom, const char *ep) +{ + const char *sp; + char *n; + int i, at; + + sp = atom; + if (*sp == '*' && sp < ep) + sp++; /* deref */ + if (ep <= sp) + die("malformed field name: %.*s", (int)(ep-atom), atom); + + /* Do we have the atom already used elsewhere? */ + for (i = 0; i < used_atom_cnt; i++) { + int len = strlen(used_atom[i]); + if (len == ep - atom && !memcmp(used_atom[i], atom, len)) + return i; + } + + /* Is the atom a valid one? */ + for (i = 0; i < ARRAY_SIZE(valid_atom); i++) { + int len = strlen(valid_atom[i].name); + if (len == ep - sp && !memcmp(valid_atom[i].name, sp, len)) + break; + } + + if (ARRAY_SIZE(valid_atom) <= i) + die("unknown field name: %.*s", (int)(ep-atom), atom); + + /* Add it in, including the deref prefix */ + at = used_atom_cnt; + used_atom_cnt++; + used_atom = xrealloc(used_atom, + (sizeof *used_atom) * used_atom_cnt); + used_atom_type = xrealloc(used_atom_type, + (sizeof(*used_atom_type) * used_atom_cnt)); + n = xmalloc(ep - atom + 1); + memcpy(n, atom, ep - atom); + n[ep-atom] = 0; + used_atom[at] = n; + used_atom_type[at] = valid_atom[i].cmp_type; + return at; +} + +/* + * In a format string, find the next occurrence of %(atom). + */ +static const char *find_next(const char *cp) +{ + while (*cp) { + if (*cp == '%') { + /* %( is the start of an atom; + * %% is a quoteed per-cent. + */ + if (cp[1] == '(') + return cp; + else if (cp[1] == '%') + cp++; /* skip over two % */ + /* otherwise this is a singleton, literal % */ + } + cp++; + } + return NULL; +} + +/* + * Make sure the format string is well formed, and parse out + * the used atoms. + */ +static void verify_format(const char *format) +{ + const char *cp, *sp; + for (cp = format; *cp && (sp = find_next(cp)); ) { + const char *ep = strchr(sp, ')'); + if (!ep) + die("malformatted format string %s", sp); + /* sp points at "%(" and ep points at the closing ")" */ + parse_atom(sp + 2, ep); + cp = ep + 1; + } +} + +/* + * Given an object name, read the object data and size, and return a + * "struct object". If the object data we are returning is also borrowed + * by the "struct object" representation, set *eaten as well---it is a + * signal from parse_object_buffer to us not to free the buffer. + */ +static void *get_obj(const unsigned char *sha1, struct object **obj, unsigned long *sz, int *eaten) +{ + char type[20]; + void *buf = read_sha1_file(sha1, type, sz); + + if (buf) + *obj = parse_object_buffer(sha1, type, *sz, buf, eaten); + else + *obj = NULL; + return buf; +} + +/* See grab_values */ +static void grab_common_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz) +{ + int i; + + for (i = 0; i < used_atom_cnt; i++) { + const char *name = used_atom[i]; + struct atom_value *v = &val[i]; + if (!!deref != (*name == '*')) + continue; + if (deref) + name++; + if (!strcmp(name, "objecttype")) + v->s = type_names[obj->type]; + else if (!strcmp(name, "objectsize")) { + char *s = xmalloc(40); + sprintf(s, "%lu", sz); + v->ul = sz; + v->s = s; + } + else if (!strcmp(name, "objectname")) { + char *s = xmalloc(41); + strcpy(s, sha1_to_hex(obj->sha1)); + v->s = s; + } + } +} + +/* See grab_values */ +static void grab_tag_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz) +{ + int i; + struct tag *tag = (struct tag *) obj; + + for (i = 0; i < used_atom_cnt; i++) { + const char *name = used_atom[i]; + struct atom_value *v = &val[i]; + if (!!deref != (*name == '*')) + continue; + if (deref) + name++; + if (!strcmp(name, "tag")) + v->s = tag->tag; + } +} + +static int num_parents(struct commit *commit) +{ + struct commit_list *parents; + int i; + + for (i = 0, parents = commit->parents; + parents; + parents = parents->next) + i++; + return i; +} + +/* See grab_values */ +static void grab_commit_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz) +{ + int i; + struct commit *commit = (struct commit *) obj; + + for (i = 0; i < used_atom_cnt; i++) { + const char *name = used_atom[i]; + struct atom_value *v = &val[i]; + if (!!deref != (*name == '*')) + continue; + if (deref) + name++; + if (!strcmp(name, "tree")) { + char *s = xmalloc(41); + strcpy(s, sha1_to_hex(commit->tree->object.sha1)); + v->s = s; + } + if (!strcmp(name, "numparent")) { + char *s = xmalloc(40); + sprintf(s, "%lu", v->ul); + v->s = s; + v->ul = num_parents(commit); + } + else if (!strcmp(name, "parent")) { + int num = num_parents(commit); + int i; + struct commit_list *parents; + char *s = xmalloc(42 * num); + v->s = s; + for (i = 0, parents = commit->parents; + parents; + parents = parents->next, i = i + 42) { + struct commit *parent = parents->item; + strcpy(s+i, sha1_to_hex(parent->object.sha1)); + if (parents->next) + s[i+40] = ' '; + } + } + } +} + +static const char *find_wholine(const char *who, int wholen, const char *buf, unsigned long sz) +{ + const char *eol; + while (*buf) { + if (!strncmp(buf, who, wholen) && + buf[wholen] == ' ') + return buf + wholen + 1; + eol = strchr(buf, '\n'); + if (!eol) + return ""; + eol++; + if (eol[1] == '\n') + return ""; /* end of header */ + buf = eol; + } + return ""; +} + +static char *copy_line(const char *buf) +{ + const char *eol = strchr(buf, '\n'); + char *line; + int len; + if (!eol) + return ""; + len = eol - buf; + line = xmalloc(len + 1); + memcpy(line, buf, len); + line[len] = 0; + return line; +} + +static char *copy_name(const char *buf) +{ + const char *eol = strchr(buf, '\n'); + const char *eoname = strstr(buf, " <"); + char *line; + int len; + if (!(eoname && eol && eoname < eol)) + return ""; + len = eoname - buf; + line = xmalloc(len + 1); + memcpy(line, buf, len); + line[len] = 0; + return line; +} + +static char *copy_email(const char *buf) +{ + const char *email = strchr(buf, '<'); + const char *eoemail = strchr(email, '>'); + char *line; + int len; + if (!email || !eoemail) + return ""; + eoemail++; + len = eoemail - email; + line = xmalloc(len + 1); + memcpy(line, email, len); + line[len] = 0; + return line; +} + +static void grab_date(const char *buf, struct atom_value *v) +{ + const char *eoemail = strstr(buf, "> "); + char *zone; + unsigned long timestamp; + long tz; + + if (!eoemail) + goto bad; + timestamp = strtoul(eoemail + 2, &zone, 10); + if (timestamp == ULONG_MAX) + goto bad; + tz = strtol(zone, NULL, 10); + if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE) + goto bad; + v->s = xstrdup(show_date(timestamp, tz, 0)); + v->ul = timestamp; + return; + bad: + v->s = ""; + v->ul = 0; +} + +/* See grab_values */ +static void grab_person(const char *who, struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz) +{ + int i; + int wholen = strlen(who); + const char *wholine = NULL; + + for (i = 0; i < used_atom_cnt; i++) { + const char *name = used_atom[i]; + struct atom_value *v = &val[i]; + if (!!deref != (*name == '*')) + continue; + if (deref) + name++; + if (strncmp(who, name, wholen)) + continue; + if (name[wholen] != 0 && + strcmp(name + wholen, "name") && + strcmp(name + wholen, "email") && + strcmp(name + wholen, "date")) + continue; + if (!wholine) + wholine = find_wholine(who, wholen, buf, sz); + if (!wholine) + return; /* no point looking for it */ + if (name[wholen] == 0) + v->s = copy_line(wholine); + else if (!strcmp(name + wholen, "name")) + v->s = copy_name(wholine); + else if (!strcmp(name + wholen, "email")) + v->s = copy_email(wholine); + else if (!strcmp(name + wholen, "date")) + grab_date(wholine, v); + } +} + +static void find_subpos(const char *buf, unsigned long sz, const char **sub, const char **body) +{ + while (*buf) { + const char *eol = strchr(buf, '\n'); + if (!eol) + return; + if (eol[1] == '\n') { + buf = eol + 1; + break; /* found end of header */ + } + buf = eol + 1; + } + while (*buf == '\n') + buf++; + if (!*buf) + return; + *sub = buf; /* first non-empty line */ + buf = strchr(buf, '\n'); + if (!buf) + return; /* no body */ + while (*buf == '\n') + buf++; /* skip blank between subject and body */ + *body = buf; +} + +/* See grab_values */ +static void grab_sub_body_contents(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz) +{ + int i; + const char *subpos = NULL, *bodypos = NULL; + + for (i = 0; i < used_atom_cnt; i++) { + const char *name = used_atom[i]; + struct atom_value *v = &val[i]; + if (!!deref != (*name == '*')) + continue; + if (deref) + name++; + if (strcmp(name, "subject") && + strcmp(name, "body") && + strcmp(name, "contents")) + continue; + if (!subpos) + find_subpos(buf, sz, &subpos, &bodypos); + if (!subpos) + return; + + if (!strcmp(name, "subject")) + v->s = copy_line(subpos); + else if (!strcmp(name, "body")) + v->s = bodypos; + else if (!strcmp(name, "contents")) + v->s = subpos; + } +} + +/* We want to have empty print-string for field requests + * that do not apply (e.g. "authordate" for a tag object) + */ +static void fill_missing_values(struct atom_value *val) +{ + int i; + for (i = 0; i < used_atom_cnt; i++) { + struct atom_value *v = &val[i]; + if (v->s == NULL) + v->s = ""; + } +} + +/* + * val is a list of atom_value to hold returned values. Extract + * the values for atoms in used_atom array out of (obj, buf, sz). + * when deref is false, (obj, buf, sz) is the object that is + * pointed at by the ref itself; otherwise it is the object the + * ref (which is a tag) refers to. + */ +static void grab_values(struct atom_value *val, int deref, struct object *obj, void *buf, unsigned long sz) +{ + grab_common_values(val, deref, obj, buf, sz); + switch (obj->type) { + case OBJ_TAG: + grab_tag_values(val, deref, obj, buf, sz); + grab_sub_body_contents(val, deref, obj, buf, sz); + grab_person("tagger", val, deref, obj, buf, sz); + break; + case OBJ_COMMIT: + grab_commit_values(val, deref, obj, buf, sz); + grab_sub_body_contents(val, deref, obj, buf, sz); + grab_person("author", val, deref, obj, buf, sz); + grab_person("committer", val, deref, obj, buf, sz); + break; + case OBJ_TREE: + // grab_tree_values(val, deref, obj, buf, sz); + break; + case OBJ_BLOB: + // grab_blob_values(val, deref, obj, buf, sz); + break; + default: + die("Eh? Object of type %d?", obj->type); + } +} + +/* + * Parse the object referred by ref, and grab needed value. + */ +static void populate_value(struct refinfo *ref) +{ + void *buf; + struct object *obj; + int eaten, i; + unsigned long size; + const unsigned char *tagged; + + ref->value = xcalloc(sizeof(struct atom_value), used_atom_cnt); + + buf = get_obj(ref->objectname, &obj, &size, &eaten); + if (!buf) + die("missing object %s for %s", + sha1_to_hex(ref->objectname), ref->refname); + if (!obj) + die("parse_object_buffer failed on %s for %s", + sha1_to_hex(ref->objectname), ref->refname); + + /* Fill in specials first */ + for (i = 0; i < used_atom_cnt; i++) { + const char *name = used_atom[i]; + struct atom_value *v = &ref->value[i]; + if (!strcmp(name, "refname")) + v->s = ref->refname; + else if (!strcmp(name, "*refname")) { + int len = strlen(ref->refname); + char *s = xmalloc(len + 4); + sprintf(s, "%s^{}", ref->refname); + v->s = s; + } + } + + grab_values(ref->value, 0, obj, buf, size); + if (!eaten) + free(buf); + + /* If there is no atom that wants to know about tagged + * object, we are done. + */ + if (!need_tagged || (obj->type != OBJ_TAG)) + return; + + /* If it is a tag object, see if we use a value that derefs + * the object, and if we do grab the object it refers to. + */ + tagged = ((struct tag *)obj)->tagged->sha1; + + /* NEEDSWORK: This derefs tag only once, which + * is good to deal with chains of trust, but + * is not consistent with what deref_tag() does + * which peels the onion to the core. + */ + buf = get_obj(tagged, &obj, &size, &eaten); + if (!buf) + die("missing object %s for %s", + sha1_to_hex(tagged), ref->refname); + if (!obj) + die("parse_object_buffer failed on %s for %s", + sha1_to_hex(tagged), ref->refname); + grab_values(ref->value, 1, obj, buf, size); + if (!eaten) + free(buf); +} + +/* + * Given a ref, return the value for the atom. This lazily gets value + * out of the object by calling populate value. + */ +static void get_value(struct refinfo *ref, int atom, struct atom_value **v) +{ + if (!ref->value) { + populate_value(ref); + fill_missing_values(ref->value); + } + *v = &ref->value[atom]; +} + +static struct refinfo **grab_array; +static const char **grab_pattern; +static int *grab_cnt; + +/* + * A call-back given to for_each_ref(). It is unfortunate that we + * need to use global variables to pass extra information to this + * function. + */ +static int grab_single_ref(const char *refname, const unsigned char *sha1) +{ + struct refinfo *ref; + int cnt; + + if (*grab_pattern) { + const char **pattern; + int namelen = strlen(refname); + for (pattern = grab_pattern; *pattern; pattern++) { + const char *p = *pattern; + int plen = strlen(p); + + if ((plen <= namelen) && + !strncmp(refname, p, plen) && + (refname[plen] == '\0' || + refname[plen] == '/')) + break; + if (!fnmatch(p, refname, FNM_PATHNAME)) + break; + } + if (!*pattern) + return 0; + } + + /* We do not open the object yet; sort may only need refname + * to do its job and the resulting list may yet to be pruned + * by maxcount logic. + */ + ref = xcalloc(1, sizeof(*ref)); + ref->refname = xstrdup(refname); + hashcpy(ref->objectname, sha1); + + cnt = *grab_cnt; + grab_array = xrealloc(grab_array, sizeof(*grab_array) * (cnt + 1)); + grab_array[cnt++] = ref; + *grab_cnt = cnt; + return 0; +} + +static struct refinfo **grab_refs(const char **pattern, int *cnt) +{ + /* Sheesh, we really should make for-each-ref to take + * callback data. + */ + *cnt = 0; + grab_pattern = pattern; + grab_cnt = cnt; + for_each_ref(grab_single_ref); + return grab_array; +} + +static int cmp_ref_sort(struct ref_sort *s, struct refinfo *a, struct refinfo *b) +{ + struct atom_value *va, *vb; + int cmp; + cmp_type cmp_type = used_atom_type[s->atom]; + + get_value(a, s->atom, &va); + get_value(b, s->atom, &vb); + switch (cmp_type) { + case FIELD_STR: + cmp = strcmp(va->s, vb->s); + break; + default: + if (va->ul < vb->ul) + cmp = -1; + else if (va->ul == vb->ul) + cmp = 0; + else + cmp = 1; + break; + } + return (s->reverse) ? -cmp : cmp; +} + +static struct ref_sort *ref_sort; +static int compare_refs(const void *a_, const void *b_) +{ + struct refinfo *a = *((struct refinfo **)a_); + struct refinfo *b = *((struct refinfo **)b_); + struct ref_sort *s; + + for (s = ref_sort; s; s = s->next) { + int cmp = cmp_ref_sort(s, a, b); + if (cmp) + return cmp; + } + return 0; +} + +static void sort_refs(struct ref_sort *sort, struct refinfo **refs, int num_refs) +{ + ref_sort = sort; + qsort(refs, num_refs, sizeof(struct refinfo *), compare_refs); +} + +static void print_value(struct refinfo *ref, int atom, int quote_style) +{ + struct atom_value *v; + get_value(ref, atom, &v); + switch (quote_style) { + case QUOTE_NONE: + fputs(v->s, stdout); + break; + case QUOTE_SHELL: + sq_quote_print(stdout, v->s); + break; + case QUOTE_PERL: + perl_quote_print(stdout, v->s); + break; + case QUOTE_PYTHON: + python_quote_print(stdout, v->s); + break; + } +} + +static int hex1(char ch) +{ + if ('0' <= ch && ch <= '9') + return ch - '0'; + else if ('a' <= ch && ch <= 'f') + return ch - 'a' + 10; + else if ('A' <= ch && ch <= 'F') + return ch - 'A' + 10; + return -1; +} +static int hex2(const char *cp) +{ + if (cp[0] && cp[1]) + return (hex1(cp[0]) << 4) | hex1(cp[1]); + else + return -1; +} + +static void emit(const char *cp, const char *ep) +{ + while (*cp && (!ep || cp < ep)) { + if (*cp == '%') { + if (cp[1] == '%') + cp++; + else { + int ch = hex2(cp + 1); + if (0 <= ch) { + putchar(ch); + cp += 3; + continue; + } + } + } + putchar(*cp); + cp++; + } +} + +static void show_ref(struct refinfo *info, const char *format, int quote_style) +{ + const char *cp, *sp, *ep; + + for (cp = format; *cp && (sp = find_next(cp)); cp = ep + 1) { + ep = strchr(sp, ')'); + if (cp < sp) + emit(cp, sp); + print_value(info, parse_atom(sp + 2, ep), quote_style); + } + if (*cp) { + sp = cp + strlen(cp); + emit(cp, sp); + } + putchar('\n'); +} + +static struct ref_sort *default_sort(void) +{ + static const char cstr_name[] = "refname"; + + struct ref_sort *sort = xcalloc(1, sizeof(*sort)); + + sort->next = NULL; + sort->atom = parse_atom(cstr_name, cstr_name + strlen(cstr_name)); + return sort; +} + +int cmd_for_each_ref(int ac, const char **av, char *prefix) +{ + int i, num_refs; + const char *format = NULL; + struct ref_sort *sort = NULL, **sort_tail = &sort; + int maxcount = 0; + int quote_style = -1; /* unspecified yet */ + struct refinfo **refs; + + for (i = 1; i < ac; i++) { + const char *arg = av[i]; + if (arg[0] != '-') + break; + if (!strcmp(arg, "--")) { + i++; + break; + } + if (!strncmp(arg, "--format=", 9)) { + if (format) + die("more than one --format?"); + format = arg + 9; + continue; + } + if (!strcmp(arg, "-s") || !strcmp(arg, "--shell") ) { + if (0 <= quote_style) + die("more than one quoting style?"); + quote_style = QUOTE_SHELL; + continue; + } + if (!strcmp(arg, "-p") || !strcmp(arg, "--perl") ) { + if (0 <= quote_style) + die("more than one quoting style?"); + quote_style = QUOTE_PERL; + continue; + } + if (!strcmp(arg, "--python") ) { + if (0 <= quote_style) + die("more than one quoting style?"); + quote_style = QUOTE_PYTHON; + continue; + } + if (!strncmp(arg, "--count=", 8)) { + if (maxcount) + die("more than one --count?"); + maxcount = atoi(arg + 8); + if (maxcount <= 0) + die("The number %s did not parse", arg); + continue; + } + if (!strncmp(arg, "--sort=", 7)) { + struct ref_sort *s = xcalloc(1, sizeof(*s)); + int len; + + s->next = NULL; + *sort_tail = s; + sort_tail = &s->next; + + arg += 7; + if (*arg == '-') { + s->reverse = 1; + arg++; + } + len = strlen(arg); + sort->atom = parse_atom(arg, arg+len); + continue; + } + break; + } + if (quote_style < 0) + quote_style = QUOTE_NONE; + + if (!sort) + sort = default_sort(); + sort_atom_limit = used_atom_cnt; + if (!format) + format = "%(objectname) %(objecttype)\t%(refname)"; + + verify_format(format); + + refs = grab_refs(av + i, &num_refs); + + for (i = 0; i < used_atom_cnt; i++) { + if (used_atom[i][0] == '*') { + need_tagged = 1; + break; + } + } + + sort_refs(sort, refs, num_refs); + + if (!maxcount || num_refs < maxcount) + maxcount = num_refs; + for (i = 0; i < maxcount; i++) + show_ref(refs[i], format, quote_style); + return 0; +} @@ -25,6 +25,7 @@ extern int cmd_diff(int argc, const char **argv, const char *prefix); extern int cmd_diff_stages(int argc, const char **argv, const char *prefix); extern int cmd_diff_tree(int argc, const char **argv, const char *prefix); extern int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix); +extern int cmd_for_each_ref(int argc, const char **argv, const char *prefix); extern int cmd_format_patch(int argc, const char **argv, const char *prefix); extern int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix); extern int cmd_grep(int argc, const char **argv, const char *prefix); @@ -46,8 +47,8 @@ extern int cmd_repo_config(int argc, const char **argv, const char *prefix); extern int cmd_rev_list(int argc, const char **argv, const char *prefix); extern int cmd_rev_parse(int argc, const char **argv, const char *prefix); extern int cmd_rm(int argc, const char **argv, const char *prefix); -extern int cmd_show_branch(int argc, const char **argv, const char *prefix); extern int cmd_show(int argc, const char **argv, const char *prefix); +extern int cmd_show_branch(int argc, const char **argv, const char *prefix); extern int cmd_stripspace(int argc, const char **argv, const char *prefix); extern int cmd_symbolic_ref(int argc, const char **argv, const char *prefix); extern int cmd_tar_tree(int argc, const char **argv, const char *prefix); @@ -231,6 +231,7 @@ static void handle_internal_command(int argc, const char **argv, char **envp) { "diff-stages", cmd_diff_stages, RUN_SETUP }, { "diff-tree", cmd_diff_tree, RUN_SETUP }, { "fmt-merge-msg", cmd_fmt_merge_msg, RUN_SETUP }, + { "for-each-ref", cmd_for_each_ref, RUN_SETUP }, { "format-patch", cmd_format_patch, RUN_SETUP }, { "get-tar-commit-id", cmd_get_tar_commit_id }, { "grep", cmd_grep, RUN_SETUP }, @@ -138,42 +138,56 @@ struct object *lookup_unknown_object(const unsigned char *sha1) return obj; } +struct object *parse_object_buffer(const unsigned char *sha1, const char *type, unsigned long size, void *buffer, int *eaten_p) +{ + struct object *obj; + int eaten = 0; + + if (!strcmp(type, blob_type)) { + struct blob *blob = lookup_blob(sha1); + parse_blob_buffer(blob, buffer, size); + obj = &blob->object; + } else if (!strcmp(type, tree_type)) { + struct tree *tree = lookup_tree(sha1); + obj = &tree->object; + if (!tree->object.parsed) { + parse_tree_buffer(tree, buffer, size); + eaten = 1; + } + } else if (!strcmp(type, commit_type)) { + struct commit *commit = lookup_commit(sha1); + parse_commit_buffer(commit, buffer, size); + if (!commit->buffer) { + commit->buffer = buffer; + eaten = 1; + } + obj = &commit->object; + } else if (!strcmp(type, tag_type)) { + struct tag *tag = lookup_tag(sha1); + parse_tag_buffer(tag, buffer, size); + obj = &tag->object; + } else { + obj = NULL; + } + *eaten_p = eaten; + return obj; +} + struct object *parse_object(const unsigned char *sha1) { unsigned long size; char type[20]; + int eaten; void *buffer = read_sha1_file(sha1, type, &size); + if (buffer) { struct object *obj; if (check_sha1_signature(sha1, buffer, size, type) < 0) printf("sha1 mismatch %s\n", sha1_to_hex(sha1)); - if (!strcmp(type, blob_type)) { - struct blob *blob = lookup_blob(sha1); - parse_blob_buffer(blob, buffer, size); - obj = &blob->object; - } else if (!strcmp(type, tree_type)) { - struct tree *tree = lookup_tree(sha1); - obj = &tree->object; - if (!tree->object.parsed) { - parse_tree_buffer(tree, buffer, size); - buffer = NULL; - } - } else if (!strcmp(type, commit_type)) { - struct commit *commit = lookup_commit(sha1); - parse_commit_buffer(commit, buffer, size); - if (!commit->buffer) { - commit->buffer = buffer; - buffer = NULL; - } - obj = &commit->object; - } else if (!strcmp(type, tag_type)) { - struct tag *tag = lookup_tag(sha1); - parse_tag_buffer(tag, buffer, size); - obj = &tag->object; - } else { - obj = NULL; - } - free(buffer); + + obj = parse_object_buffer(sha1, type, size, buffer, &eaten); + if (!eaten) + free(buffer); return obj; } return NULL; @@ -59,6 +59,12 @@ void created_object(const unsigned char *sha1, struct object *obj); /** Returns the object, having parsed it to find out what it is. **/ struct object *parse_object(const unsigned char *sha1); +/* Given the result of read_sha1_file(), returns the object after + * parsing it. eaten_p indicates if the object has a borrowed copy + * of buffer and the caller should not free() it. + */ +struct object *parse_object_buffer(const unsigned char *sha1, const char *type, unsigned long size, void *buffer, int *eaten_p); + /** Returns the object, with potentially excess memory allocated. **/ struct object *lookup_unknown_object(const unsigned char *sha1); @@ -349,3 +349,41 @@ void write_name_quoted(const char *prefix, int prefix_len, else goto no_quote; } + +/* quoting as a string literal for other languages */ + +void perl_quote_print(FILE *stream, const char *src) +{ + const char sq = '\''; + const char bq = '\\'; + char c; + + fputc(sq, stream); + while ((c = *src++)) { + if (c == sq || c == bq) + fputc(bq, stream); + fputc(c, stream); + } + fputc(sq, stream); +} + +void python_quote_print(FILE *stream, const char *src) +{ + const char sq = '\''; + const char bq = '\\'; + const char nl = '\n'; + char c; + + fputc(sq, stream); + while ((c = *src++)) { + if (c == nl) { + fputc(bq, stream); + fputc('n', stream); + continue; + } + if (c == sq || c == bq) + fputc(bq, stream); + fputc(c, stream); + } + fputc(sq, stream); +} @@ -52,4 +52,8 @@ extern char *unquote_c_style(const char *quoted, const char **endp); extern void write_name_quoted(const char *prefix, int prefix_len, const char *name, int quote, FILE *out); +/* quoting as a string literal for other languages */ +extern void perl_quote_print(FILE *stream, const char *src); +extern void python_quote_print(FILE *stream, const char *src); + #endif |