diff options
Diffstat (limited to 'commit.c')
| -rw-r--r-- | commit.c | 1780 |
1 files changed, 723 insertions, 1057 deletions
@@ -3,70 +3,16 @@ #include "commit.h" #include "pkt-line.h" #include "utf8.h" -#include "interpolate.h" #include "diff.h" #include "revision.h" +#include "notes.h" +#include "gpg-interface.h" +#include "mergesort.h" int save_commit_buffer = 1; -struct sort_node -{ - /* - * the number of children of the associated commit - * that also occur in the list being sorted. - */ - unsigned int indegree; - - /* - * reference to original list item that we will re-use - * on output. - */ - struct commit_list * list_item; - -}; - const char *commit_type = "commit"; -static struct cmt_fmt_map { - const char *n; - size_t cmp_len; - enum cmit_fmt v; -} cmt_fmts[] = { - { "raw", 1, CMIT_FMT_RAW }, - { "medium", 1, CMIT_FMT_MEDIUM }, - { "short", 1, CMIT_FMT_SHORT }, - { "email", 1, CMIT_FMT_EMAIL }, - { "full", 5, CMIT_FMT_FULL }, - { "fuller", 5, CMIT_FMT_FULLER }, - { "oneline", 1, CMIT_FMT_ONELINE }, - { "format:", 7, CMIT_FMT_USERFORMAT}, -}; - -static char *user_format; - -enum cmit_fmt get_commit_format(const char *arg) -{ - int i; - - if (!arg || !*arg) - return CMIT_FMT_DEFAULT; - if (*arg == '=') - arg++; - if (!prefixcmp(arg, "format:")) { - if (user_format) - free(user_format); - user_format = xstrdup(arg + 7); - return CMIT_FMT_USERFORMAT; - } - for (i = 0; i < ARRAY_SIZE(cmt_fmts); i++) { - if (!strncmp(arg, cmt_fmts[i].n, cmt_fmts[i].cmp_len) && - !strncmp(arg, cmt_fmts[i].n, strlen(arg))) - return cmt_fmts[i].v; - } - - die("invalid --pretty format: %s", arg); -} - static struct commit *check_commit(struct object *obj, const unsigned char *sha1, int quiet) @@ -95,6 +41,18 @@ struct commit *lookup_commit_reference(const unsigned char *sha1) return lookup_commit_reference_gently(sha1, 0); } +struct commit *lookup_commit_or_die(const unsigned char *sha1, const char *ref_name) +{ + struct commit *c = lookup_commit_reference(sha1); + if (!c) + die(_("could not parse %s"), ref_name); + if (hashcmp(sha1, c->object.sha1)) { + warning(_("%s %s is not a commit!"), + ref_name, sha1_to_hex(sha1)); + } + return c; +} + struct commit *lookup_commit(const unsigned char *sha1) { struct object *obj = lookup_object(sha1); @@ -105,22 +63,44 @@ struct commit *lookup_commit(const unsigned char *sha1) return check_commit(obj, sha1, 0); } -static unsigned long parse_commit_date(const char *buf) +struct commit *lookup_commit_reference_by_name(const char *name) { - unsigned long date; + unsigned char sha1[20]; + struct commit *commit; + if (get_sha1(name, sha1)) + return NULL; + commit = lookup_commit_reference(sha1); + if (!commit || parse_commit(commit)) + return NULL; + return commit; +} + +static unsigned long parse_commit_date(const char *buf, const char *tail) +{ + const char *dateptr; + + if (buf + 6 >= tail) + return 0; if (memcmp(buf, "author", 6)) return 0; - while (*buf++ != '\n') + while (buf < tail && *buf++ != '\n') /* nada */; + if (buf + 9 >= tail) + return 0; if (memcmp(buf, "committer", 9)) return 0; - while (*buf++ != '>') + while (buf < tail && *buf++ != '>') + /* nada */; + if (buf >= tail) + return 0; + dateptr = buf; + while (buf < tail && *buf++ != '\n') /* nada */; - date = strtoul(buf, NULL, 10); - if (date == ULONG_MAX) - date = 0; - return date; + if (buf >= tail) + return 0; + /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */ + return strtoul(dateptr, NULL, 10); } static struct commit_graft **commit_graft; @@ -180,16 +160,12 @@ struct commit_graft *read_graft_line(char *buf, int len) int i; struct commit_graft *graft = NULL; - if (buf[len-1] == '\n') - buf[--len] = 0; + while (len && isspace(buf[len-1])) + buf[--len] = '\0'; if (buf[0] == '#' || buf[0] == '\0') return NULL; - if ((len + 1) % 41) { - bad_graft_data: - error("bad graft data: %s", buf); - free(graft); - return NULL; - } + if ((len + 1) % 41) + goto bad_graft_data; i = (len + 1) / 41 - 1; graft = xmalloc(sizeof(*graft) + 20 * i); graft->nr_parent = i; @@ -202,9 +178,14 @@ struct commit_graft *read_graft_line(char *buf, int len) goto bad_graft_data; } return graft; + +bad_graft_data: + error("bad graft data: %s", buf); + free(graft); + return NULL; } -int read_graft_file(const char *graft_file) +static int read_graft_file(const char *graft_file) { FILE *fp = fopen(graft_file, "r"); char buf[1024]; @@ -237,7 +218,7 @@ static void prepare_commit_graft(void) commit_graft_prepared = 1; } -static struct commit_graft *lookup_commit_graft(const unsigned char *sha1) +struct commit_graft *lookup_commit_graft(const unsigned char *sha1) { int pos; prepare_commit_graft(); @@ -247,24 +228,12 @@ static struct commit_graft *lookup_commit_graft(const unsigned char *sha1) return commit_graft[pos]; } -int write_shallow_commits(int fd, int use_pack_protocol) +int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data) { - int i, count = 0; - for (i = 0; i < commit_graft_nr; i++) - if (commit_graft[i]->nr_parent < 0) { - const char *hex = - sha1_to_hex(commit_graft[i]->sha1); - count++; - if (use_pack_protocol) - packet_write(fd, "shallow %s", hex); - else { - if (write_in_full(fd, hex, 40) != 40) - break; - if (write_in_full(fd, "\n", 1) != 1) - break; - } - } - return count; + int i, ret; + for (i = ret = 0; i < commit_graft_nr && !ret; i++) + ret = fn(commit_graft[i], cb_data); + return ret; } int unregister_shallow(const unsigned char *sha1) @@ -273,34 +242,31 @@ int unregister_shallow(const unsigned char *sha1) if (pos < 0) return -1; if (pos + 1 < commit_graft_nr) - memcpy(commit_graft + pos, commit_graft + pos + 1, + memmove(commit_graft + pos, commit_graft + pos + 1, sizeof(struct commit_graft *) * (commit_graft_nr - pos - 1)); commit_graft_nr--; return 0; } -int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size) +int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size) { - char *tail = buffer; - char *bufptr = buffer; + const char *tail = buffer; + const char *bufptr = buffer; unsigned char parent[20]; struct commit_list **pptr; struct commit_graft *graft; - unsigned n_refs = 0; if (item->object.parsed) return 0; item->object.parsed = 1; tail += size; - if (tail <= bufptr + 5 || memcmp(bufptr, "tree ", 5)) + if (tail <= bufptr + 46 || memcmp(bufptr, "tree ", 5) || bufptr[45] != '\n') return error("bogus commit object %s", sha1_to_hex(item->object.sha1)); - if (tail <= bufptr + 45 || get_sha1_hex(bufptr + 5, parent) < 0) + if (get_sha1_hex(bufptr + 5, parent) < 0) return error("bad tree pointer in commit %s", sha1_to_hex(item->object.sha1)); item->tree = lookup_tree(parent); - if (item->tree) - n_refs++; bufptr += 46; /* "tree " + "hex sha1" + "\n" */ pptr = &item->parents; @@ -313,13 +279,15 @@ int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size) bufptr[47] != '\n') return error("bad parents in commit %s", sha1_to_hex(item->object.sha1)); bufptr += 48; - if (graft) + /* + * The clone is shallow if nr_parent < 0, and we must + * not traverse its real parents even when we unhide them. + */ + if (graft && (graft->nr_parent < 0 || grafts_replace_parents)) continue; new_parent = lookup_commit(parent); - if (new_parent) { + if (new_parent) pptr = &commit_list_insert(new_parent, pptr)->next; - n_refs++; - } } if (graft) { int i; @@ -329,21 +297,9 @@ int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size) if (!new_parent) continue; pptr = &commit_list_insert(new_parent, pptr)->next; - n_refs++; } } - item->date = parse_commit_date(bufptr); - - if (track_object_refs) { - unsigned i = 0; - struct commit_list *p; - struct object_refs *refs = alloc_object_refs(n_refs); - if (item->tree) - refs->ref[i++] = &item->tree->object; - for (p = item->parents; p; p = p->next) - refs->ref[i++] = &p->item->object; - set_object_refs(&item->object, refs); - } + item->date = parse_commit_date(bufptr, tail); return 0; } @@ -355,6 +311,8 @@ int parse_commit(struct commit *item) unsigned long size; int ret; + if (!item) + return -1; if (item->object.parsed) return 0; buffer = read_sha1_file(item->object.sha1, &type, &size); @@ -375,6 +333,25 @@ int parse_commit(struct commit *item) return ret; } +int find_commit_subject(const char *commit_buffer, const char **subject) +{ + const char *eol; + const char *p = commit_buffer; + + while (*p && (*p != '\n' || p[1] != '\n')) + p++; + if (*p) { + p += 2; + for (eol = p; *eol && *eol != '\n'; eol++) + ; /* do nothing */ + } else + eol = p; + + *subject = p; + + return eol - p; +} + struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p) { struct commit_list *new_list = xmalloc(sizeof(struct commit_list)); @@ -384,6 +361,14 @@ struct commit_list *commit_list_insert(struct commit *item, struct commit_list * return new_list; } +unsigned commit_list_count(const struct commit_list *l) +{ + unsigned c = 0; + for (; l; l = l->next ) + c++; + return c; +} + void free_commit_list(struct commit_list *list) { while (list) { @@ -393,7 +378,7 @@ void free_commit_list(struct commit_list *list) } } -struct commit_list * insert_by_date(struct commit *item, struct commit_list **list) +struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list) { struct commit_list **pp = list; struct commit_list *p; @@ -406,15 +391,31 @@ struct commit_list * insert_by_date(struct commit *item, struct commit_list **li return commit_list_insert(item, pp); } +static int commit_list_compare_by_date(const void *a, const void *b) +{ + unsigned long a_date = ((const struct commit_list *)a)->item->date; + unsigned long b_date = ((const struct commit_list *)b)->item->date; + if (a_date < b_date) + return 1; + if (a_date > b_date) + return -1; + return 0; +} -void sort_by_date(struct commit_list **list) +static void *commit_list_get_next(const void *a) { - struct commit_list *ret = NULL; - while (*list) { - insert_by_date((*list)->item, &ret); - *list = (*list)->next; - } - *list = ret; + return ((const struct commit_list *)a)->next; +} + +static void commit_list_set_next(void *a, void *next) +{ + ((struct commit_list *)a)->next = next; +} + +void commit_list_sort_by_date(struct commit_list **list) +{ + *list = llist_mergesort(*list, commit_list_get_next, commit_list_set_next, + commit_list_compare_by_date); } struct commit *pop_most_recent_commit(struct commit_list **list, @@ -429,837 +430,57 @@ struct commit *pop_most_recent_commit(struct commit_list **list, while (parents) { struct commit *commit = parents->item; - parse_commit(commit); - if (!(commit->object.flags & mark)) { + if (!parse_commit(commit) && !(commit->object.flags & mark)) { commit->object.flags |= mark; - insert_by_date(commit, list); + commit_list_insert_by_date(commit, list); } parents = parents->next; } return ret; } -void clear_commit_marks(struct commit *commit, unsigned int mark) -{ - struct commit_list *parents; - - commit->object.flags &= ~mark; - parents = commit->parents; - while (parents) { - struct commit *parent = parents->item; - - /* Have we already cleared this? */ - if (mark & parent->object.flags) - clear_commit_marks(parent, mark); - parents = parents->next; - } -} - -/* - * Generic support for pretty-printing the header - */ -static int get_one_line(const char *msg, unsigned long len) -{ - int ret = 0; - - while (len--) { - char c = *msg++; - if (!c) - break; - ret++; - if (c == '\n') - break; - } - return ret; -} - -/* High bit set, or ISO-2022-INT */ -static int non_ascii(int ch) -{ - ch = (ch & 0xff); - return ((ch & 0x80) || (ch == 0x1b)); -} - -static int is_rfc2047_special(char ch) -{ - return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_')); -} - -static int add_rfc2047(char *buf, const char *line, int len, - const char *encoding) -{ - char *bp = buf; - int i, needquote; - char q_encoding[128]; - const char *q_encoding_fmt = "=?%s?q?"; - - for (i = needquote = 0; !needquote && i < len; i++) { - int ch = line[i]; - if (non_ascii(ch)) - needquote++; - if ((i + 1 < len) && - (ch == '=' && line[i+1] == '?')) - needquote++; - } - if (!needquote) - return sprintf(buf, "%.*s", len, line); - - i = snprintf(q_encoding, sizeof(q_encoding), q_encoding_fmt, encoding); - if (sizeof(q_encoding) < i) - die("Insanely long encoding name %s", encoding); - memcpy(bp, q_encoding, i); - bp += i; - for (i = 0; i < len; i++) { - unsigned ch = line[i] & 0xFF; - /* - * We encode ' ' using '=20' even though rfc2047 - * allows using '_' for readability. Unfortunately, - * many programs do not understand this and just - * leave the underscore in place. - */ - if (is_rfc2047_special(ch) || ch == ' ') { - sprintf(bp, "=%02X", ch); - bp += 3; - } - else - *bp++ = ch; - } - memcpy(bp, "?=", 2); - bp += 2; - return bp - buf; -} - -static unsigned long bound_rfc2047(unsigned long len, const char *encoding) -{ - /* upper bound of q encoded string of length 'len' */ - unsigned long elen = strlen(encoding); - - return len * 3 + elen + 100; -} - -static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf, - const char *line, enum date_mode dmode, - const char *encoding) -{ - char *date; - int namelen; - unsigned long time; - int tz, ret; - const char *filler = " "; - - if (fmt == CMIT_FMT_ONELINE) - return 0; - date = strchr(line, '>'); - if (!date) - return 0; - namelen = ++date - line; - time = strtoul(date, &date, 10); - tz = strtol(date, NULL, 10); - - if (fmt == CMIT_FMT_EMAIL) { - char *name_tail = strchr(line, '<'); - int display_name_length; - if (!name_tail) - return 0; - while (line < name_tail && isspace(name_tail[-1])) - name_tail--; - display_name_length = name_tail - line; - filler = ""; - strcpy(buf, "From: "); - ret = strlen(buf); - ret += add_rfc2047(buf + ret, line, display_name_length, - encoding); - memcpy(buf + ret, name_tail, namelen - display_name_length); - ret += namelen - display_name_length; - buf[ret++] = '\n'; - } - else { - ret = sprintf(buf, "%s: %.*s%.*s\n", what, - (fmt == CMIT_FMT_FULLER) ? 4 : 0, - filler, namelen, line); - } - switch (fmt) { - case CMIT_FMT_MEDIUM: - ret += sprintf(buf + ret, "Date: %s\n", - show_date(time, tz, dmode)); - break; - case CMIT_FMT_EMAIL: - ret += sprintf(buf + ret, "Date: %s\n", - show_date(time, tz, DATE_RFC2822)); - break; - case CMIT_FMT_FULLER: - ret += sprintf(buf + ret, "%sDate: %s\n", what, - show_date(time, tz, dmode)); - break; - default: - /* notin' */ - break; - } - return ret; -} - -static int is_empty_line(const char *line, int *len_p) -{ - int len = *len_p; - while (len && isspace(line[len-1])) - len--; - *len_p = len; - return !len; -} - -static int add_merge_info(enum cmit_fmt fmt, char *buf, const struct commit *commit, int abbrev) -{ - struct commit_list *parent = commit->parents; - int offset; - - if ((fmt == CMIT_FMT_ONELINE) || (fmt == CMIT_FMT_EMAIL) || - !parent || !parent->next) - return 0; - - offset = sprintf(buf, "Merge:"); - - while (parent) { - struct commit *p = parent->item; - const char *hex = NULL; - const char *dots; - if (abbrev) - hex = find_unique_abbrev(p->object.sha1, abbrev); - if (!hex) - hex = sha1_to_hex(p->object.sha1); - dots = (abbrev && strlen(hex) != 40) ? "..." : ""; - parent = parent->next; - - offset += sprintf(buf + offset, " %s%s", hex, dots); - } - buf[offset++] = '\n'; - return offset; -} - -static char *get_header(const struct commit *commit, const char *key) -{ - int key_len = strlen(key); - const char *line = commit->buffer; - - for (;;) { - const char *eol = strchr(line, '\n'), *next; - - if (line == eol) - return NULL; - if (!eol) { - eol = line + strlen(line); - next = NULL; - } else - next = eol + 1; - if (eol - line > key_len && - !strncmp(line, key, key_len) && - line[key_len] == ' ') { - int len = eol - line - key_len; - char *ret = xmalloc(len); - memcpy(ret, line + key_len + 1, len - 1); - ret[len - 1] = '\0'; - return ret; - } - line = next; - } -} - -static char *replace_encoding_header(char *buf, const char *encoding) -{ - char *encoding_header = strstr(buf, "\nencoding "); - char *header_end = strstr(buf, "\n\n"); - char *end_of_encoding_header; - int encoding_header_pos; - int encoding_header_len; - int new_len; - int need_len; - int buflen = strlen(buf) + 1; - - if (!header_end) - header_end = buf + buflen; - if (!encoding_header || encoding_header >= header_end) - return buf; - encoding_header++; - end_of_encoding_header = strchr(encoding_header, '\n'); - if (!end_of_encoding_header) - return buf; /* should not happen but be defensive */ - end_of_encoding_header++; - - encoding_header_len = end_of_encoding_header - encoding_header; - encoding_header_pos = encoding_header - buf; - - if (is_encoding_utf8(encoding)) { - /* we have re-coded to UTF-8; drop the header */ - memmove(encoding_header, end_of_encoding_header, - buflen - (encoding_header_pos + encoding_header_len)); - return buf; - } - new_len = strlen(encoding); - need_len = new_len + strlen("encoding \n"); - if (encoding_header_len < need_len) { - buf = xrealloc(buf, buflen + (need_len - encoding_header_len)); - encoding_header = buf + encoding_header_pos; - end_of_encoding_header = encoding_header + encoding_header_len; - } - memmove(end_of_encoding_header + (need_len - encoding_header_len), - end_of_encoding_header, - buflen - (encoding_header_pos + encoding_header_len)); - memcpy(encoding_header + 9, encoding, strlen(encoding)); - encoding_header[9 + new_len] = '\n'; - return buf; -} - -static char *logmsg_reencode(const struct commit *commit, - const char *output_encoding) -{ - static const char *utf8 = "utf-8"; - const char *use_encoding; - char *encoding; - char *out; - - if (!*output_encoding) - return NULL; - encoding = get_header(commit, "encoding"); - use_encoding = encoding ? encoding : utf8; - if (!strcmp(use_encoding, output_encoding)) - if (encoding) /* we'll strip encoding header later */ - out = xstrdup(commit->buffer); - else - return NULL; /* nothing to do */ - else - out = reencode_string(commit->buffer, - output_encoding, use_encoding); - if (out) - out = replace_encoding_header(out, output_encoding); - - free(encoding); - return out; -} - -static void fill_person(struct interp *table, const char *msg, int len) -{ - int start, end, tz = 0; - unsigned long date; - char *ep; - - /* parse name */ - for (end = 0; end < len && msg[end] != '<'; end++) - ; /* do nothing */ - start = end + 1; - while (end > 0 && isspace(msg[end - 1])) - end--; - table[0].value = xstrndup(msg, end); - - if (start >= len) - return; - - /* parse email */ - for (end = start + 1; end < len && msg[end] != '>'; end++) - ; /* do nothing */ - - if (end >= len) - return; - - table[1].value = xstrndup(msg + start, end - start); - - /* parse date */ - for (start = end + 1; start < len && isspace(msg[start]); start++) - ; /* do nothing */ - if (start >= len) - return; - date = strtoul(msg + start, &ep, 10); - if (msg + start == ep) - return; - - table[5].value = xstrndup(msg + start, ep - (msg + start)); - - /* parse tz */ - for (start = ep - msg + 1; start < len && isspace(msg[start]); start++) - ; /* do nothing */ - if (start + 1 < len) { - tz = strtoul(msg + start + 1, NULL, 10); - if (msg[start] == '-') - tz = -tz; - } - - interp_set_entry(table, 2, show_date(date, tz, DATE_NORMAL)); - interp_set_entry(table, 3, show_date(date, tz, DATE_RFC2822)); - interp_set_entry(table, 4, show_date(date, tz, DATE_RELATIVE)); - interp_set_entry(table, 6, show_date(date, tz, DATE_ISO8601)); -} - -static long format_commit_message(const struct commit *commit, - const char *msg, char **buf_p, unsigned long *space_p) +static void clear_commit_marks_1(struct commit_list **plist, + struct commit *commit, unsigned int mark) { - struct interp table[] = { - { "%H" }, /* commit hash */ - { "%h" }, /* abbreviated commit hash */ - { "%T" }, /* tree hash */ - { "%t" }, /* abbreviated tree hash */ - { "%P" }, /* parent hashes */ - { "%p" }, /* abbreviated parent hashes */ - { "%an" }, /* author name */ - { "%ae" }, /* author email */ - { "%ad" }, /* author date */ - { "%aD" }, /* author date, RFC2822 style */ - { "%ar" }, /* author date, relative */ - { "%at" }, /* author date, UNIX timestamp */ - { "%ai" }, /* author date, ISO 8601 */ - { "%cn" }, /* committer name */ - { "%ce" }, /* committer email */ - { "%cd" }, /* committer date */ - { "%cD" }, /* committer date, RFC2822 style */ - { "%cr" }, /* committer date, relative */ - { "%ct" }, /* committer date, UNIX timestamp */ - { "%ci" }, /* committer date, ISO 8601 */ - { "%e" }, /* encoding */ - { "%s" }, /* subject */ - { "%b" }, /* body */ - { "%Cred" }, /* red */ - { "%Cgreen" }, /* green */ - { "%Cblue" }, /* blue */ - { "%Creset" }, /* reset color */ - { "%n" }, /* newline */ - { "%m" }, /* left/right/bottom */ - }; - enum interp_index { - IHASH = 0, IHASH_ABBREV, - ITREE, ITREE_ABBREV, - IPARENTS, IPARENTS_ABBREV, - IAUTHOR_NAME, IAUTHOR_EMAIL, - IAUTHOR_DATE, IAUTHOR_DATE_RFC2822, IAUTHOR_DATE_RELATIVE, - IAUTHOR_TIMESTAMP, IAUTHOR_ISO8601, - ICOMMITTER_NAME, ICOMMITTER_EMAIL, - ICOMMITTER_DATE, ICOMMITTER_DATE_RFC2822, - ICOMMITTER_DATE_RELATIVE, ICOMMITTER_TIMESTAMP, - ICOMMITTER_ISO8601, - IENCODING, - ISUBJECT, - IBODY, - IRED, IGREEN, IBLUE, IRESET_COLOR, - INEWLINE, - ILEFT_RIGHT, - }; - struct commit_list *p; - char parents[1024]; - int i; - enum { HEADER, SUBJECT, BODY } state; - - if (ILEFT_RIGHT + 1 != ARRAY_SIZE(table)) - die("invalid interp table!"); - - /* these are independent of the commit */ - interp_set_entry(table, IRED, "\033[31m"); - interp_set_entry(table, IGREEN, "\033[32m"); - interp_set_entry(table, IBLUE, "\033[34m"); - interp_set_entry(table, IRESET_COLOR, "\033[m"); - interp_set_entry(table, INEWLINE, "\n"); - - /* these depend on the commit */ - if (!commit->object.parsed) - parse_object(commit->object.sha1); - interp_set_entry(table, IHASH, sha1_to_hex(commit->object.sha1)); - interp_set_entry(table, IHASH_ABBREV, - find_unique_abbrev(commit->object.sha1, - DEFAULT_ABBREV)); - interp_set_entry(table, ITREE, sha1_to_hex(commit->tree->object.sha1)); - interp_set_entry(table, ITREE_ABBREV, - find_unique_abbrev(commit->tree->object.sha1, - DEFAULT_ABBREV)); - interp_set_entry(table, ILEFT_RIGHT, - (commit->object.flags & BOUNDARY) - ? "-" - : (commit->object.flags & SYMMETRIC_LEFT) - ? "<" - : ">"); - - parents[1] = 0; - for (i = 0, p = commit->parents; - p && i < sizeof(parents) - 1; - p = p->next) - i += snprintf(parents + i, sizeof(parents) - i - 1, " %s", - sha1_to_hex(p->item->object.sha1)); - interp_set_entry(table, IPARENTS, parents + 1); - - parents[1] = 0; - for (i = 0, p = commit->parents; - p && i < sizeof(parents) - 1; - p = p->next) - i += snprintf(parents + i, sizeof(parents) - i - 1, " %s", - find_unique_abbrev(p->item->object.sha1, - DEFAULT_ABBREV)); - interp_set_entry(table, IPARENTS_ABBREV, parents + 1); - - for (i = 0, state = HEADER; msg[i] && state < BODY; i++) { - int eol; - for (eol = i; msg[eol] && msg[eol] != '\n'; eol++) - ; /* do nothing */ - - if (state == SUBJECT) { - table[ISUBJECT].value = xstrndup(msg + i, eol - i); - i = eol; - } - if (i == eol) { - state++; - /* strip empty lines */ - while (msg[eol + 1] == '\n') - eol++; - } else if (!prefixcmp(msg + i, "author ")) - fill_person(table + IAUTHOR_NAME, - msg + i + 7, eol - i - 7); - else if (!prefixcmp(msg + i, "committer ")) - fill_person(table + ICOMMITTER_NAME, - msg + i + 10, eol - i - 10); - else if (!prefixcmp(msg + i, "encoding ")) - table[IENCODING].value = - xstrndup(msg + i + 9, eol - i - 9); - i = eol; - } - if (msg[i]) - table[IBODY].value = xstrdup(msg + i); - for (i = 0; i < ARRAY_SIZE(table); i++) - if (!table[i].value) - interp_set_entry(table, i, "<unknown>"); - - do { - char *buf = *buf_p; - unsigned long space = *space_p; - - space = interpolate(buf, space, user_format, - table, ARRAY_SIZE(table)); - if (!space) - break; - buf = xrealloc(buf, space); - *buf_p = buf; - *space_p = space; - } while (1); - interp_clear_table(table, ARRAY_SIZE(table)); - - return strlen(*buf_p); -} - -static void pp_header(enum cmit_fmt fmt, - int abbrev, - enum date_mode dmode, - const char *encoding, - const struct commit *commit, - const char **msg_p, - unsigned long *len_p, - unsigned long *ofs_p, - char **buf_p, - unsigned long *space_p) -{ - int parents_shown = 0; - - for (;;) { - const char *line = *msg_p; - char *dst; - int linelen = get_one_line(*msg_p, *len_p); - unsigned long len; - - if (!linelen) - return; - *msg_p += linelen; - *len_p -= linelen; + while (commit) { + struct commit_list *parents; - if (linelen == 1) - /* End of header */ + if (!(mark & commit->object.flags)) return; - ALLOC_GROW(*buf_p, linelen + *ofs_p + 20, *space_p); - dst = *buf_p + *ofs_p; + commit->object.flags &= ~mark; - if (fmt == CMIT_FMT_RAW) { - memcpy(dst, line, linelen); - *ofs_p += linelen; - continue; - } - - if (!memcmp(line, "parent ", 7)) { - if (linelen != 48) - die("bad parent line in commit"); - continue; - } - - if (!parents_shown) { - struct commit_list *parent; - int num; - for (parent = commit->parents, num = 0; - parent; - parent = parent->next, num++) - ; - /* with enough slop */ - num = *ofs_p + num * 50 + 20; - ALLOC_GROW(*buf_p, num, *space_p); - dst = *buf_p + *ofs_p; - *ofs_p += add_merge_info(fmt, dst, commit, abbrev); - parents_shown = 1; - } - - /* - * MEDIUM == DEFAULT shows only author with dates. - * FULL shows both authors but not dates. - * FULLER shows both authors and dates. - */ - if (!memcmp(line, "author ", 7)) { - len = linelen; - if (fmt == CMIT_FMT_EMAIL) - len = bound_rfc2047(linelen, encoding); - ALLOC_GROW(*buf_p, *ofs_p + len + 80, *space_p); - dst = *buf_p + *ofs_p; - *ofs_p += add_user_info("Author", fmt, dst, - line + 7, dmode, encoding); - } - - if (!memcmp(line, "committer ", 10) && - (fmt == CMIT_FMT_FULL || fmt == CMIT_FMT_FULLER)) { - len = linelen; - if (fmt == CMIT_FMT_EMAIL) - len = bound_rfc2047(linelen, encoding); - ALLOC_GROW(*buf_p, *ofs_p + len + 80, *space_p); - dst = *buf_p + *ofs_p; - *ofs_p += add_user_info("Commit", fmt, dst, - line + 10, dmode, encoding); - } - } -} - -static void pp_title_line(enum cmit_fmt fmt, - const char **msg_p, - unsigned long *len_p, - unsigned long *ofs_p, - char **buf_p, - unsigned long *space_p, - int indent, - const char *subject, - const char *after_subject, - const char *encoding, - int plain_non_ascii) -{ - char *title; - unsigned long title_alloc, title_len; - unsigned long len; - - title_len = 0; - title_alloc = 80; - title = xmalloc(title_alloc); - for (;;) { - const char *line = *msg_p; - int linelen = get_one_line(line, *len_p); - *msg_p += linelen; - *len_p -= linelen; - - if (!linelen || is_empty_line(line, &linelen)) - break; + parents = commit->parents; + if (!parents) + return; - if (title_alloc <= title_len + linelen + 2) { - title_alloc = title_len + linelen + 80; - title = xrealloc(title, title_alloc); - } - len = 0; - if (title_len) { - if (fmt == CMIT_FMT_EMAIL) { - len++; - title[title_len++] = '\n'; - } - len++; - title[title_len++] = ' '; - } - memcpy(title + title_len, line, linelen); - title_len += linelen; - } + while ((parents = parents->next)) + commit_list_insert(parents->item, plist); - /* Enough slop for the MIME header and rfc2047 */ - len = bound_rfc2047(title_len, encoding)+ 1000; - if (subject) - len += strlen(subject); - if (after_subject) - len += strlen(after_subject); - if (encoding) - len += strlen(encoding); - ALLOC_GROW(*buf_p, title_len + *ofs_p + len, *space_p); - - if (subject) { - len = strlen(subject); - memcpy(*buf_p + *ofs_p, subject, len); - *ofs_p += len; - *ofs_p += add_rfc2047(*buf_p + *ofs_p, - title, title_len, encoding); - } else { - memcpy(*buf_p + *ofs_p, title, title_len); - *ofs_p += title_len; - } - (*buf_p)[(*ofs_p)++] = '\n'; - if (plain_non_ascii) { - const char *header_fmt = - "MIME-Version: 1.0\n" - "Content-Type: text/plain; charset=%s\n" - "Content-Transfer-Encoding: 8bit\n"; - *ofs_p += snprintf(*buf_p + *ofs_p, - *space_p - *ofs_p, - header_fmt, encoding); - } - if (after_subject) { - len = strlen(after_subject); - memcpy(*buf_p + *ofs_p, after_subject, len); - *ofs_p += len; - } - free(title); - if (fmt == CMIT_FMT_EMAIL) { - ALLOC_GROW(*buf_p, *ofs_p + 20, *space_p); - (*buf_p)[(*ofs_p)++] = '\n'; + commit = commit->parents->item; } } -static void pp_remainder(enum cmit_fmt fmt, - const char **msg_p, - unsigned long *len_p, - unsigned long *ofs_p, - char **buf_p, - unsigned long *space_p, - int indent) +void clear_commit_marks(struct commit *commit, unsigned int mark) { - int first = 1; - for (;;) { - const char *line = *msg_p; - int linelen = get_one_line(line, *len_p); - *msg_p += linelen; - *len_p -= linelen; - - if (!linelen) - break; - - if (is_empty_line(line, &linelen)) { - if (first) - continue; - if (fmt == CMIT_FMT_SHORT) - break; - } - first = 0; - - ALLOC_GROW(*buf_p, *ofs_p + linelen + indent + 20, *space_p); - if (indent) { - memset(*buf_p + *ofs_p, ' ', indent); - *ofs_p += indent; - } - memcpy(*buf_p + *ofs_p, line, linelen); - *ofs_p += linelen; - (*buf_p)[(*ofs_p)++] = '\n'; - } + struct commit_list *list = NULL; + commit_list_insert(commit, &list); + while (list) + clear_commit_marks_1(&list, pop_commit(&list), mark); } -unsigned long pretty_print_commit(enum cmit_fmt fmt, - const struct commit *commit, - unsigned long len, - char **buf_p, unsigned long *space_p, - int abbrev, const char *subject, - const char *after_subject, - enum date_mode dmode) +void clear_commit_marks_for_object_array(struct object_array *a, unsigned mark) { - unsigned long offset = 0; - unsigned long beginning_of_body; - int indent = 4; - const char *msg = commit->buffer; - int plain_non_ascii = 0; - char *reencoded; - const char *encoding; - char *buf; - - if (fmt == CMIT_FMT_USERFORMAT) - return format_commit_message(commit, msg, buf_p, space_p); - - encoding = (git_log_output_encoding - ? git_log_output_encoding - : git_commit_encoding); - if (!encoding) - encoding = "utf-8"; - reencoded = logmsg_reencode(commit, encoding); - if (reencoded) { - msg = reencoded; - len = strlen(reencoded); - } - - if (fmt == CMIT_FMT_ONELINE || fmt == CMIT_FMT_EMAIL) - indent = 0; - - /* After-subject is used to pass in Content-Type: multipart - * MIME header; in that case we do not have to do the - * plaintext content type even if the commit message has - * non 7-bit ASCII character. Otherwise, check if we need - * to say this is not a 7-bit ASCII. - */ - if (fmt == CMIT_FMT_EMAIL && !after_subject) { - int i, ch, in_body; - - for (in_body = i = 0; (ch = msg[i]) && i < len; i++) { - if (!in_body) { - /* author could be non 7-bit ASCII but - * the log may be so; skip over the - * header part first. - */ - if (ch == '\n' && - i + 1 < len && msg[i+1] == '\n') - in_body = 1; - } - else if (non_ascii(ch)) { - plain_non_ascii = 1; - break; - } - } + struct object *object; + struct commit *commit; + unsigned int i; + + for (i = 0; i < a->nr; i++) { + object = a->objects[i].item; + commit = lookup_commit_reference_gently(object->sha1, 1); + if (commit) + clear_commit_marks(commit, mark); } - - pp_header(fmt, abbrev, dmode, encoding, - commit, &msg, &len, - &offset, buf_p, space_p); - if (fmt != CMIT_FMT_ONELINE && !subject) { - ALLOC_GROW(*buf_p, offset + 20, *space_p); - (*buf_p)[offset++] = '\n'; - } - - /* Skip excess blank lines at the beginning of body, if any... */ - for (;;) { - int linelen = get_one_line(msg, len); - int ll = linelen; - if (!linelen) - break; - if (!is_empty_line(msg, &ll)) - break; - msg += linelen; - len -= linelen; - } - - /* These formats treat the title line specially. */ - if (fmt == CMIT_FMT_ONELINE - || fmt == CMIT_FMT_EMAIL) - pp_title_line(fmt, &msg, &len, &offset, - buf_p, space_p, indent, - subject, after_subject, encoding, - plain_non_ascii); - - beginning_of_body = offset; - if (fmt != CMIT_FMT_ONELINE) - pp_remainder(fmt, &msg, &len, &offset, - buf_p, space_p, indent); - - while (offset && isspace((*buf_p)[offset-1])) - offset--; - - ALLOC_GROW(*buf_p, offset + 20, *space_p); - buf = *buf_p; - - /* Make sure there is an EOLN for the non-oneline case */ - if (fmt != CMIT_FMT_ONELINE) - buf[offset++] = '\n'; - - /* - * The caller may append additional body text in e-mail - * format. Make sure we did not strip the blank line - * between the header and the body. - */ - if (fmt == CMIT_FMT_EMAIL && offset <= beginning_of_body) - buf[offset++] = '\n'; - buf[offset] = '\0'; - free(reencoded); - return offset; } struct commit *pop_commit(struct commit_list **stack) @@ -1274,125 +495,94 @@ struct commit *pop_commit(struct commit_list **stack) return item; } -void topo_sort_default_setter(struct commit *c, void *data) -{ - c->util = data; -} - -void *topo_sort_default_getter(struct commit *c) -{ - return c->util; -} - /* * Performs an in-place topological sort on the list supplied. */ void sort_in_topological_order(struct commit_list ** list, int lifo) { - sort_in_topological_order_fn(list, lifo, topo_sort_default_setter, - topo_sort_default_getter); -} - -void sort_in_topological_order_fn(struct commit_list ** list, int lifo, - topo_sort_set_fn_t setter, - topo_sort_get_fn_t getter) -{ - struct commit_list * next = *list; - struct commit_list * work = NULL, **insert; - struct commit_list ** pptr = list; - struct sort_node * nodes; - struct sort_node * next_nodes; - int count = 0; - - /* determine the size of the list */ - while (next) { - next = next->next; - count++; - } + struct commit_list *next, *orig = *list; + struct commit_list *work, **insert; + struct commit_list **pptr; - if (!count) + if (!orig) return; - /* allocate an array to help sort the list */ - nodes = xcalloc(count, sizeof(*nodes)); - /* link the list to the array */ - next_nodes = nodes; - next=*list; - while (next) { - next_nodes->list_item = next; - setter(next->item, next_nodes); - next_nodes++; - next = next->next; + *list = NULL; + + /* Mark them and clear the indegree */ + for (next = orig; next; next = next->next) { + struct commit *commit = next->item; + commit->indegree = 1; } + /* update the indegree */ - next=*list; - while (next) { + for (next = orig; next; next = next->next) { struct commit_list * parents = next->item->parents; while (parents) { - struct commit * parent=parents->item; - struct sort_node * pn = (struct sort_node *) getter(parent); + struct commit *parent = parents->item; - if (pn) - pn->indegree++; - parents=parents->next; + if (parent->indegree) + parent->indegree++; + parents = parents->next; } - next=next->next; } + /* - * find the tips - * - * tips are nodes not reachable from any other node in the list - * - * the tips serve as a starting set for the work queue. - */ - next=*list; + * find the tips + * + * tips are nodes not reachable from any other node in the list + * + * the tips serve as a starting set for the work queue. + */ + work = NULL; insert = &work; - while (next) { - struct sort_node * node = (struct sort_node *) getter(next->item); + for (next = orig; next; next = next->next) { + struct commit *commit = next->item; - if (node->indegree == 0) { - insert = &commit_list_insert(next->item, insert)->next; - } - next=next->next; + if (commit->indegree == 1) + insert = &commit_list_insert(commit, insert)->next; } /* process the list in topological order */ if (!lifo) - sort_by_date(&work); + commit_list_sort_by_date(&work); + + pptr = list; + *list = NULL; while (work) { - struct commit * work_item = pop_commit(&work); - struct sort_node * work_node = (struct sort_node *) getter(work_item); - struct commit_list * parents = work_item->parents; + struct commit *commit; + struct commit_list *parents, *work_item; - while (parents) { - struct commit * parent=parents->item; - struct sort_node * pn = (struct sort_node *) getter(parent); - - if (pn) { - /* - * parents are only enqueued for emission - * when all their children have been emitted thereby - * guaranteeing topological order. - */ - pn->indegree--; - if (!pn->indegree) { - if (!lifo) - insert_by_date(parent, &work); - else - commit_list_insert(parent, &work); - } + work_item = work; + work = work_item->next; + work_item->next = NULL; + + commit = work_item->item; + for (parents = commit->parents; parents ; parents = parents->next) { + struct commit *parent = parents->item; + + if (!parent->indegree) + continue; + + /* + * parents are only enqueued for emission + * when all their children have been emitted thereby + * guaranteeing topological order. + */ + if (--parent->indegree == 1) { + if (!lifo) + commit_list_insert_by_date(parent, &work); + else + commit_list_insert(parent, &work); } - parents=parents->next; } /* - * work_item is a commit all of whose children - * have already been emitted. we can emit it now. - */ - *pptr = work_node->list_item; - pptr = &(*pptr)->next; - *pptr = NULL; - setter(work_item, NULL); + * work_item is a commit all of whose children + * have already been emitted. we can emit it now. + */ + commit->indegree = 0; + *pptr = work_item; + pptr = &work_item->next; } - free(nodes); } /* merge-base stuff */ @@ -1417,41 +607,51 @@ static struct commit *interesting(struct commit_list *list) return NULL; } -static struct commit_list *merge_bases(struct commit *one, struct commit *two) +static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos) { struct commit_list *list = NULL; struct commit_list *result = NULL; + int i; - if (one == two) - /* We do not mark this even with RESULT so we do not - * have to clean it up. - */ - return commit_list_insert(one, &result); + for (i = 0; i < n; i++) { + if (one == twos[i]) + /* + * We do not mark this even with RESULT so we do not + * have to clean it up. + */ + return commit_list_insert(one, &result); + } - parse_commit(one); - parse_commit(two); + if (parse_commit(one)) + return NULL; + for (i = 0; i < n; i++) { + if (parse_commit(twos[i])) + return NULL; + } one->object.flags |= PARENT1; - two->object.flags |= PARENT2; - insert_by_date(one, &list); - insert_by_date(two, &list); + commit_list_insert_by_date(one, &list); + for (i = 0; i < n; i++) { + twos[i]->object.flags |= PARENT2; + commit_list_insert_by_date(twos[i], &list); + } while (interesting(list)) { struct commit *commit; struct commit_list *parents; - struct commit_list *n; + struct commit_list *next; int flags; commit = list->item; - n = list->next; + next = list->next; free(list); - list = n; + list = next; flags = commit->object.flags & (PARENT1 | PARENT2 | STALE); if (flags == (PARENT1 | PARENT2)) { if (!(commit->object.flags & RESULT)) { commit->object.flags |= RESULT; - insert_by_date(commit, &result); + commit_list_insert_by_date(commit, &result); } /* Mark parents of a found merge stale */ flags |= STALE; @@ -1462,9 +662,10 @@ static struct commit_list *merge_bases(struct commit *one, struct commit *two) parents = parents->next; if ((p->object.flags & flags) == flags) continue; - parse_commit(p); + if (parse_commit(p)) + return NULL; p->object.flags |= flags; - insert_by_date(p, &list); + commit_list_insert_by_date(p, &list); } } @@ -1472,31 +673,62 @@ static struct commit_list *merge_bases(struct commit *one, struct commit *two) free_commit_list(list); list = result; result = NULL; while (list) { - struct commit_list *n = list->next; + struct commit_list *next = list->next; if (!(list->item->object.flags & STALE)) - insert_by_date(list->item, &result); + commit_list_insert_by_date(list->item, &result); free(list); - list = n; + list = next; } return result; } -struct commit_list *get_merge_bases(struct commit *one, - struct commit *two, - int cleanup) +struct commit_list *get_octopus_merge_bases(struct commit_list *in) +{ + struct commit_list *i, *j, *k, *ret = NULL; + struct commit_list **pptr = &ret; + + for (i = in; i; i = i->next) { + if (!ret) + pptr = &commit_list_insert(i->item, pptr)->next; + else { + struct commit_list *new = NULL, *end = NULL; + + for (j = ret; j; j = j->next) { + struct commit_list *bases; + bases = get_merge_bases(i->item, j->item, 1); + if (!new) + new = bases; + else + end->next = bases; + for (k = bases; k; k = k->next) + end = k; + } + ret = new; + } + } + return ret; +} + +struct commit_list *get_merge_bases_many(struct commit *one, + int n, + struct commit **twos, + int cleanup) { struct commit_list *list; struct commit **rslt; struct commit_list *result; int cnt, i, j; - result = merge_bases(one, two); - if (one == two) - return result; + result = merge_bases_many(one, n, twos); + for (i = 0; i < n; i++) { + if (one == twos[i]) + return result; + } if (!result || !result->next) { if (cleanup) { clear_commit_marks(one, all_flags); - clear_commit_marks(two, all_flags); + for (i = 0; i < n; i++) + clear_commit_marks(twos[i], all_flags); } return result; } @@ -1514,12 +746,13 @@ struct commit_list *get_merge_bases(struct commit *one, free_commit_list(result); clear_commit_marks(one, all_flags); - clear_commit_marks(two, all_flags); + for (i = 0; i < n; i++) + clear_commit_marks(twos[i], all_flags); for (i = 0; i < cnt - 1; i++) { for (j = i+1; j < cnt; j++) { if (!rslt[i] || !rslt[j]) continue; - result = merge_bases(rslt[i], rslt[j]); + result = merge_bases_many(rslt[i], 1, &rslt[j]); clear_commit_marks(rslt[i], all_flags); clear_commit_marks(rslt[j], all_flags); for (list = result; list; list = list->next) { @@ -1535,12 +768,33 @@ struct commit_list *get_merge_bases(struct commit *one, result = NULL; for (i = 0; i < cnt; i++) { if (rslt[i]) - insert_by_date(rslt[i], &result); + commit_list_insert_by_date(rslt[i], &result); } free(rslt); return result; } +struct commit_list *get_merge_bases(struct commit *one, struct commit *two, + int cleanup) +{ + return get_merge_bases_many(one, 1, &two, cleanup); +} + +int is_descendant_of(struct commit *commit, struct commit_list *with_commit) +{ + if (!with_commit) + return 1; + while (with_commit) { + struct commit *other; + + other = with_commit->item; + with_commit = with_commit->next; + if (in_merge_bases(other, &commit, 1)) + return 1; + } + return 0; +} + int in_merge_bases(struct commit *commit, struct commit **reference, int num) { struct commit_list *bases, *b; @@ -1560,3 +814,415 @@ int in_merge_bases(struct commit *commit, struct commit **reference, int num) free_commit_list(bases); return ret; } + +struct commit_list *reduce_heads(struct commit_list *heads) +{ + struct commit_list *p; + struct commit_list *result = NULL, **tail = &result; + struct commit **other; + size_t num_head, num_other; + + if (!heads) + return NULL; + + /* Avoid unnecessary reallocations */ + for (p = heads, num_head = 0; p; p = p->next) + num_head++; + other = xcalloc(sizeof(*other), num_head); + + /* For each commit, see if it can be reached by others */ + for (p = heads; p; p = p->next) { + struct commit_list *q, *base; + + /* Do we already have this in the result? */ + for (q = result; q; q = q->next) + if (p->item == q->item) + break; + if (q) + continue; + + num_other = 0; + for (q = heads; q; q = q->next) { + if (p->item == q->item) + continue; + other[num_other++] = q->item; + } + if (num_other) + base = get_merge_bases_many(p->item, num_other, other, 1); + else + base = NULL; + /* + * If p->item does not have anything common with other + * commits, there won't be any merge base. If it is + * reachable from some of the others, p->item will be + * the merge base. If its history is connected with + * others, but p->item is not reachable by others, we + * will get something other than p->item back. + */ + if (!base || (base->item != p->item)) + tail = &(commit_list_insert(p->item, tail)->next); + free_commit_list(base); + } + free(other); + return result; +} + +static const char gpg_sig_header[] = "gpgsig"; +static const int gpg_sig_header_len = sizeof(gpg_sig_header) - 1; + +static int do_sign_commit(struct strbuf *buf, const char *keyid) +{ + struct strbuf sig = STRBUF_INIT; + int inspos, copypos; + + /* find the end of the header */ + inspos = strstr(buf->buf, "\n\n") - buf->buf + 1; + + if (!keyid || !*keyid) + keyid = get_signing_key(); + if (sign_buffer(buf, &sig, keyid)) { + strbuf_release(&sig); + return -1; + } + + for (copypos = 0; sig.buf[copypos]; ) { + const char *bol = sig.buf + copypos; + const char *eol = strchrnul(bol, '\n'); + int len = (eol - bol) + !!*eol; + + if (!copypos) { + strbuf_insert(buf, inspos, gpg_sig_header, gpg_sig_header_len); + inspos += gpg_sig_header_len; + } + strbuf_insert(buf, inspos++, " ", 1); + strbuf_insert(buf, inspos, bol, len); + inspos += len; + copypos += len; + } + strbuf_release(&sig); + return 0; +} + +int parse_signed_commit(const unsigned char *sha1, + struct strbuf *payload, struct strbuf *signature) +{ + unsigned long size; + enum object_type type; + char *buffer = read_sha1_file(sha1, &type, &size); + int in_signature, saw_signature = -1; + char *line, *tail; + + if (!buffer || type != OBJ_COMMIT) + goto cleanup; + + line = buffer; + tail = buffer + size; + in_signature = 0; + saw_signature = 0; + while (line < tail) { + const char *sig = NULL; + char *next = memchr(line, '\n', tail - line); + + next = next ? next + 1 : tail; + if (in_signature && line[0] == ' ') + sig = line + 1; + else if (!prefixcmp(line, gpg_sig_header) && + line[gpg_sig_header_len] == ' ') + sig = line + gpg_sig_header_len + 1; + if (sig) { + strbuf_add(signature, sig, next - sig); + saw_signature = 1; + in_signature = 1; + } else { + if (*line == '\n') + /* dump the whole remainder of the buffer */ + next = tail; + strbuf_add(payload, line, next - line); + in_signature = 0; + } + line = next; + } + cleanup: + free(buffer); + return saw_signature; +} + +static void handle_signed_tag(struct commit *parent, struct commit_extra_header ***tail) +{ + struct merge_remote_desc *desc; + struct commit_extra_header *mergetag; + char *buf; + unsigned long size, len; + enum object_type type; + + desc = merge_remote_util(parent); + if (!desc || !desc->obj) + return; + buf = read_sha1_file(desc->obj->sha1, &type, &size); + if (!buf || type != OBJ_TAG) + goto free_return; + len = parse_signature(buf, size); + if (size == len) + goto free_return; + /* + * We could verify this signature and either omit the tag when + * it does not validate, but the integrator may not have the + * public key of the signer of the tag he is merging, while a + * later auditor may have it while auditing, so let's not run + * verify-signed-buffer here for now... + * + * if (verify_signed_buffer(buf, len, buf + len, size - len, ...)) + * warn("warning: signed tag unverified."); + */ + mergetag = xcalloc(1, sizeof(*mergetag)); + mergetag->key = xstrdup("mergetag"); + mergetag->value = buf; + mergetag->len = size; + + **tail = mergetag; + *tail = &mergetag->next; + return; + +free_return: + free(buf); +} + +void append_merge_tag_headers(struct commit_list *parents, + struct commit_extra_header ***tail) +{ + while (parents) { + struct commit *parent = parents->item; + handle_signed_tag(parent, tail); + parents = parents->next; + } +} + +static void add_extra_header(struct strbuf *buffer, + struct commit_extra_header *extra) +{ + strbuf_addstr(buffer, extra->key); + if (extra->len) + strbuf_add_lines(buffer, " ", extra->value, extra->len); + else + strbuf_addch(buffer, '\n'); +} + +struct commit_extra_header *read_commit_extra_headers(struct commit *commit, + const char **exclude) +{ + struct commit_extra_header *extra = NULL; + unsigned long size; + enum object_type type; + char *buffer = read_sha1_file(commit->object.sha1, &type, &size); + if (buffer && type == OBJ_COMMIT) + extra = read_commit_extra_header_lines(buffer, size, exclude); + free(buffer); + return extra; +} + +static inline int standard_header_field(const char *field, size_t len) +{ + return ((len == 4 && !memcmp(field, "tree ", 5)) || + (len == 6 && !memcmp(field, "parent ", 7)) || + (len == 6 && !memcmp(field, "author ", 7)) || + (len == 9 && !memcmp(field, "committer ", 10)) || + (len == 8 && !memcmp(field, "encoding ", 9))); +} + +static int excluded_header_field(const char *field, size_t len, const char **exclude) +{ + if (!exclude) + return 0; + + while (*exclude) { + size_t xlen = strlen(*exclude); + if (len == xlen && + !memcmp(field, *exclude, xlen) && field[xlen] == ' ') + return 1; + exclude++; + } + return 0; +} + +struct commit_extra_header *read_commit_extra_header_lines(const char *buffer, size_t size, + const char **exclude) +{ + struct commit_extra_header *extra = NULL, **tail = &extra, *it = NULL; + const char *line, *next, *eof, *eob; + struct strbuf buf = STRBUF_INIT; + + for (line = buffer, eob = line + size; + line < eob && *line != '\n'; + line = next) { + next = memchr(line, '\n', eob - line); + next = next ? next + 1 : eob; + if (*line == ' ') { + /* continuation */ + if (it) + strbuf_add(&buf, line + 1, next - (line + 1)); + continue; + } + if (it) + it->value = strbuf_detach(&buf, &it->len); + strbuf_reset(&buf); + it = NULL; + + eof = strchr(line, ' '); + if (next <= eof) + eof = next; + + if (standard_header_field(line, eof - line) || + excluded_header_field(line, eof - line, exclude)) + continue; + + it = xcalloc(1, sizeof(*it)); + it->key = xmemdupz(line, eof-line); + *tail = it; + tail = &it->next; + if (eof + 1 < next) + strbuf_add(&buf, eof + 1, next - (eof + 1)); + } + if (it) + it->value = strbuf_detach(&buf, &it->len); + return extra; +} + +void free_commit_extra_headers(struct commit_extra_header *extra) +{ + while (extra) { + struct commit_extra_header *next = extra->next; + free(extra->key); + free(extra->value); + free(extra); + extra = next; + } +} + +int commit_tree(const struct strbuf *msg, unsigned char *tree, + struct commit_list *parents, unsigned char *ret, + const char *author, const char *sign_commit) +{ + struct commit_extra_header *extra = NULL, **tail = &extra; + int result; + + append_merge_tag_headers(parents, &tail); + result = commit_tree_extended(msg, tree, parents, ret, + author, sign_commit, extra); + free_commit_extra_headers(extra); + return result; +} + +static const char commit_utf8_warn[] = +"Warning: commit message does not conform to UTF-8.\n" +"You may want to amend it after fixing the message, or set the config\n" +"variable i18n.commitencoding to the encoding your project uses.\n"; + +int commit_tree_extended(const struct strbuf *msg, unsigned char *tree, + struct commit_list *parents, unsigned char *ret, + const char *author, const char *sign_commit, + struct commit_extra_header *extra) +{ + int result; + int encoding_is_utf8; + struct strbuf buffer; + + assert_sha1_type(tree, OBJ_TREE); + + if (memchr(msg->buf, '\0', msg->len)) + return error("a NUL byte in commit log message not allowed."); + + /* Not having i18n.commitencoding is the same as having utf-8 */ + encoding_is_utf8 = is_encoding_utf8(git_commit_encoding); + + strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */ + strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree)); + + /* + * NOTE! This ordering means that the same exact tree merged with a + * different order of parents will be a _different_ changeset even + * if everything else stays the same. + */ + while (parents) { + struct commit_list *next = parents->next; + struct commit *parent = parents->item; + + strbuf_addf(&buffer, "parent %s\n", + sha1_to_hex(parent->object.sha1)); + free(parents); + parents = next; + } + + /* Person/date information */ + if (!author) + author = git_author_info(IDENT_STRICT); + strbuf_addf(&buffer, "author %s\n", author); + strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_STRICT)); + if (!encoding_is_utf8) + strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding); + + while (extra) { + add_extra_header(&buffer, extra); + extra = extra->next; + } + strbuf_addch(&buffer, '\n'); + + /* And add the comment */ + strbuf_addbuf(&buffer, msg); + + /* And check the encoding */ + if (encoding_is_utf8 && !is_utf8(buffer.buf)) + fprintf(stderr, commit_utf8_warn); + + if (sign_commit && do_sign_commit(&buffer, sign_commit)) + return -1; + + result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret); + strbuf_release(&buffer); + return result; +} + +struct commit *get_merge_parent(const char *name) +{ + struct object *obj; + struct commit *commit; + unsigned char sha1[20]; + if (get_sha1(name, sha1)) + return NULL; + obj = parse_object(sha1); + commit = (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT); + if (commit && !commit->util) { + struct merge_remote_desc *desc; + desc = xmalloc(sizeof(*desc)); + desc->obj = obj; + desc->name = strdup(name); + commit->util = desc; + } + return commit; +} + +/* + * Append a commit to the end of the commit_list. + * + * next starts by pointing to the variable that holds the head of an + * empty commit_list, and is updated to point to the "next" field of + * the last item on the list as new commits are appended. + * + * Usage example: + * + * struct commit_list *list; + * struct commit_list **next = &list; + * + * next = commit_list_append(c1, next); + * next = commit_list_append(c2, next); + * assert(commit_list_count(list) == 2); + * return list; + */ +struct commit_list **commit_list_append(struct commit *commit, + struct commit_list **next) +{ + struct commit_list *new = xmalloc(sizeof(struct commit_list)); + new->item = commit; + *next = new; + new->next = NULL; + return &new->next; +} |