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-rw-r--r--blame.c1089
1 files changed, 1089 insertions, 0 deletions
diff --git a/blame.c b/blame.c
new file mode 100644
index 0000000000..1144c85337
--- /dev/null
+++ b/blame.c
@@ -0,0 +1,1089 @@
+/*
+ * Copyright (C) 2006, Fredrik Kuivinen <freku045@student.liu.se>
+ */
+
+#include <assert.h>
+#include <time.h>
+#include <sys/time.h>
+#include <math.h>
+
+#include "cache.h"
+#include "refs.h"
+#include "tag.h"
+#include "commit.h"
+#include "tree.h"
+#include "blob.h"
+#include "diff.h"
+#include "diffcore.h"
+#include "revision.h"
+#include "xdiff-interface.h"
+#include "quote.h"
+
+#ifndef DEBUG
+#define DEBUG 0
+#endif
+
+static const char blame_usage[] =
+"git-blame [-c] [-l] [-t] [-f] [-n] [-p] [-S <revs-file>] [--] file [commit]\n"
+" -c, --compatibility Use the same output mode as git-annotate (Default: off)\n"
+" -l, --long Show long commit SHA1 (Default: off)\n"
+" -t, --time Show raw timestamp (Default: off)\n"
+" -f, --show-name Show original filename (Default: auto)\n"
+" -n, --show-number Show original linenumber (Default: off)\n"
+" -p, --porcelain Show in a format designed for machine consumption\n"
+" -S revs-file Use revisions from revs-file instead of calling git-rev-list\n"
+" -h, --help This message";
+
+static struct commit **blame_lines;
+static int num_blame_lines;
+static char *blame_contents;
+static int blame_len;
+
+struct util_info {
+ int *line_map;
+ unsigned char sha1[20]; /* blob sha, not commit! */
+ char *buf;
+ unsigned long size;
+ int num_lines;
+ const char *pathname;
+ unsigned meta_given:1;
+
+ void *topo_data;
+};
+
+struct chunk {
+ int off1, len1; /* --- */
+ int off2, len2; /* +++ */
+};
+
+struct patch {
+ struct chunk *chunks;
+ int num;
+};
+
+static void get_blob(struct commit *commit);
+
+/* Only used for statistics */
+static int num_get_patch;
+static int num_commits;
+static int patch_time;
+static int num_read_blob;
+
+struct blame_diff_state {
+ struct xdiff_emit_state xm;
+ struct patch *ret;
+};
+
+static void process_u0_diff(void *state_, char *line, unsigned long len)
+{
+ struct blame_diff_state *state = state_;
+ struct chunk *chunk;
+
+ if (len < 4 || line[0] != '@' || line[1] != '@')
+ return;
+
+ if (DEBUG)
+ printf("chunk line: %.*s", (int)len, line);
+ state->ret->num++;
+ state->ret->chunks = xrealloc(state->ret->chunks,
+ sizeof(struct chunk) * state->ret->num);
+ chunk = &state->ret->chunks[state->ret->num - 1];
+
+ assert(!strncmp(line, "@@ -", 4));
+
+ if (parse_hunk_header(line, len,
+ &chunk->off1, &chunk->len1,
+ &chunk->off2, &chunk->len2)) {
+ state->ret->num--;
+ return;
+ }
+
+ if (chunk->len1 == 0)
+ chunk->off1++;
+ if (chunk->len2 == 0)
+ chunk->off2++;
+
+ if (chunk->off1 > 0)
+ chunk->off1--;
+ if (chunk->off2 > 0)
+ chunk->off2--;
+
+ assert(chunk->off1 >= 0);
+ assert(chunk->off2 >= 0);
+}
+
+static struct patch *get_patch(struct commit *commit, struct commit *other)
+{
+ struct blame_diff_state state;
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ mmfile_t file_c, file_o;
+ xdemitcb_t ecb;
+ struct util_info *info_c = (struct util_info *)commit->util;
+ struct util_info *info_o = (struct util_info *)other->util;
+ struct timeval tv_start, tv_end;
+
+ get_blob(commit);
+ file_c.ptr = info_c->buf;
+ file_c.size = info_c->size;
+
+ get_blob(other);
+ file_o.ptr = info_o->buf;
+ file_o.size = info_o->size;
+
+ gettimeofday(&tv_start, NULL);
+
+ xpp.flags = XDF_NEED_MINIMAL;
+ xecfg.ctxlen = 0;
+ xecfg.flags = 0;
+ ecb.outf = xdiff_outf;
+ ecb.priv = &state;
+ memset(&state, 0, sizeof(state));
+ state.xm.consume = process_u0_diff;
+ state.ret = xmalloc(sizeof(struct patch));
+ state.ret->chunks = NULL;
+ state.ret->num = 0;
+
+ xdl_diff(&file_c, &file_o, &xpp, &xecfg, &ecb);
+
+ gettimeofday(&tv_end, NULL);
+ patch_time += 1000000 * (tv_end.tv_sec - tv_start.tv_sec) +
+ tv_end.tv_usec - tv_start.tv_usec;
+
+ num_get_patch++;
+ return state.ret;
+}
+
+static void free_patch(struct patch *p)
+{
+ free(p->chunks);
+ free(p);
+}
+
+static int get_blob_sha1_internal(const unsigned char *sha1, const char *base,
+ int baselen, const char *pathname,
+ unsigned mode, int stage);
+
+static unsigned char blob_sha1[20];
+static const char *blame_file;
+static int get_blob_sha1(struct tree *t, const char *pathname,
+ unsigned char *sha1)
+{
+ const char *pathspec[2];
+ blame_file = pathname;
+ pathspec[0] = pathname;
+ pathspec[1] = NULL;
+ hashclr(blob_sha1);
+ read_tree_recursive(t, "", 0, 0, pathspec, get_blob_sha1_internal);
+
+ if (is_null_sha1(blob_sha1))
+ return -1;
+
+ hashcpy(sha1, blob_sha1);
+ return 0;
+}
+
+static int get_blob_sha1_internal(const unsigned char *sha1, const char *base,
+ int baselen, const char *pathname,
+ unsigned mode, int stage)
+{
+ if (S_ISDIR(mode))
+ return READ_TREE_RECURSIVE;
+
+ if (strncmp(blame_file, base, baselen) ||
+ strcmp(blame_file + baselen, pathname))
+ return -1;
+
+ hashcpy(blob_sha1, sha1);
+ return -1;
+}
+
+static void get_blob(struct commit *commit)
+{
+ struct util_info *info = commit->util;
+ char type[20];
+
+ if (info->buf)
+ return;
+
+ info->buf = read_sha1_file(info->sha1, type, &info->size);
+ num_read_blob++;
+
+ assert(!strcmp(type, blob_type));
+}
+
+/* For debugging only */
+static void print_patch(struct patch *p)
+{
+ int i;
+ printf("Num chunks: %d\n", p->num);
+ for (i = 0; i < p->num; i++) {
+ printf("%d,%d %d,%d\n", p->chunks[i].off1, p->chunks[i].len1,
+ p->chunks[i].off2, p->chunks[i].len2);
+ }
+}
+
+#if DEBUG
+/* For debugging only */
+static void print_map(struct commit *cmit, struct commit *other)
+{
+ struct util_info *util = cmit->util;
+ struct util_info *util2 = other->util;
+
+ int i;
+ int max =
+ util->num_lines >
+ util2->num_lines ? util->num_lines : util2->num_lines;
+ int num;
+
+ if (print_map == NULL)
+ ; /* to avoid "unused function" warning */
+
+ for (i = 0; i < max; i++) {
+ printf("i: %d ", i);
+ num = -1;
+
+ if (i < util->num_lines) {
+ num = util->line_map[i];
+ printf("%d\t", num);
+ }
+ else
+ printf("\t");
+
+ if (i < util2->num_lines) {
+ int num2 = util2->line_map[i];
+ printf("%d\t", num2);
+ if (num != -1 && num2 != num)
+ printf("---");
+ }
+ else
+ printf("\t");
+
+ printf("\n");
+ }
+}
+#endif
+
+/* p is a patch from commit to other. */
+static void fill_line_map(struct commit *commit, struct commit *other,
+ struct patch *p)
+{
+ struct util_info *util = commit->util;
+ struct util_info *util2 = other->util;
+ int *map = util->line_map;
+ int *map2 = util2->line_map;
+ int cur_chunk = 0;
+ int i1, i2;
+
+ if (DEBUG) {
+ if (p->num)
+ print_patch(p);
+ printf("num lines 1: %d num lines 2: %d\n", util->num_lines,
+ util2->num_lines);
+ }
+
+ for (i1 = 0, i2 = 0; i1 < util->num_lines; i1++, i2++) {
+ struct chunk *chunk = NULL;
+ if (cur_chunk < p->num)
+ chunk = &p->chunks[cur_chunk];
+
+ if (chunk && chunk->off1 == i1) {
+ if (DEBUG && i2 != chunk->off2)
+ printf("i2: %d off2: %d\n", i2, chunk->off2);
+
+ assert(i2 == chunk->off2);
+
+ i1--;
+ i2--;
+ if (chunk->len1 > 0)
+ i1 += chunk->len1;
+
+ if (chunk->len2 > 0)
+ i2 += chunk->len2;
+
+ cur_chunk++;
+ }
+ else {
+ if (i2 >= util2->num_lines)
+ break;
+
+ if (map[i1] != map2[i2] && map[i1] != -1) {
+ if (DEBUG)
+ printf("map: i1: %d %d %p i2: %d %d %p\n",
+ i1, map[i1],
+ (void *) (i1 != -1 ? blame_lines[map[i1]] : NULL),
+ i2, map2[i2],
+ (void *) (i2 != -1 ? blame_lines[map2[i2]] : NULL));
+ if (map2[i2] != -1 &&
+ blame_lines[map[i1]] &&
+ !blame_lines[map2[i2]])
+ map[i1] = map2[i2];
+ }
+
+ if (map[i1] == -1 && map2[i2] != -1)
+ map[i1] = map2[i2];
+ }
+
+ if (DEBUG > 1)
+ printf("l1: %d l2: %d i1: %d i2: %d\n",
+ map[i1], map2[i2], i1, i2);
+ }
+}
+
+static int map_line(struct commit *commit, int line)
+{
+ struct util_info *info = commit->util;
+ assert(line >= 0 && line < info->num_lines);
+ return info->line_map[line];
+}
+
+static struct util_info *get_util(struct commit *commit)
+{
+ struct util_info *util = commit->util;
+
+ if (util)
+ return util;
+
+ util = xcalloc(1, sizeof(struct util_info));
+ util->num_lines = -1;
+ commit->util = util;
+ return util;
+}
+
+static int fill_util_info(struct commit *commit)
+{
+ struct util_info *util = commit->util;
+
+ assert(util);
+ assert(util->pathname);
+
+ return !!get_blob_sha1(commit->tree, util->pathname, util->sha1);
+}
+
+static void alloc_line_map(struct commit *commit)
+{
+ struct util_info *util = commit->util;
+ int i;
+
+ if (util->line_map)
+ return;
+
+ get_blob(commit);
+
+ util->num_lines = 0;
+ for (i = 0; i < util->size; i++) {
+ if (util->buf[i] == '\n')
+ util->num_lines++;
+ }
+ if (util->buf[util->size - 1] != '\n')
+ util->num_lines++;
+
+ util->line_map = xmalloc(sizeof(int) * util->num_lines);
+
+ for (i = 0; i < util->num_lines; i++)
+ util->line_map[i] = -1;
+}
+
+static void init_first_commit(struct commit *commit, const char *filename)
+{
+ struct util_info *util = commit->util;
+ int i;
+
+ util->pathname = filename;
+ if (fill_util_info(commit))
+ die("fill_util_info failed");
+
+ alloc_line_map(commit);
+
+ util = commit->util;
+
+ for (i = 0; i < util->num_lines; i++)
+ util->line_map[i] = i;
+}
+
+static void process_commits(struct rev_info *rev, const char *path,
+ struct commit **initial)
+{
+ int i;
+ struct util_info *util;
+ int lines_left;
+ int *blame_p;
+ int *new_lines;
+ int new_lines_len;
+
+ struct commit *commit = get_revision(rev);
+ assert(commit);
+ init_first_commit(commit, path);
+
+ util = commit->util;
+ num_blame_lines = util->num_lines;
+ blame_lines = xmalloc(sizeof(struct commit *) * num_blame_lines);
+ blame_contents = util->buf;
+ blame_len = util->size;
+
+ for (i = 0; i < num_blame_lines; i++)
+ blame_lines[i] = NULL;
+
+ lines_left = num_blame_lines;
+ blame_p = xmalloc(sizeof(int) * num_blame_lines);
+ new_lines = xmalloc(sizeof(int) * num_blame_lines);
+ do {
+ struct commit_list *parents;
+ int num_parents;
+ struct util_info *util;
+
+ if (DEBUG)
+ printf("\nProcessing commit: %d %s\n", num_commits,
+ sha1_to_hex(commit->object.sha1));
+
+ if (lines_left == 0)
+ return;
+
+ num_commits++;
+ memset(blame_p, 0, sizeof(int) * num_blame_lines);
+ new_lines_len = 0;
+ num_parents = 0;
+ for (parents = commit->parents;
+ parents != NULL; parents = parents->next)
+ num_parents++;
+
+ if (num_parents == 0)
+ *initial = commit;
+
+ if (fill_util_info(commit))
+ continue;
+
+ alloc_line_map(commit);
+ util = commit->util;
+
+ for (parents = commit->parents;
+ parents != NULL; parents = parents->next) {
+ struct commit *parent = parents->item;
+ struct patch *patch;
+
+ if (parse_commit(parent) < 0)
+ die("parse_commit error");
+
+ if (DEBUG)
+ printf("parent: %s\n",
+ sha1_to_hex(parent->object.sha1));
+
+ if (fill_util_info(parent)) {
+ num_parents--;
+ continue;
+ }
+
+ patch = get_patch(parent, commit);
+ alloc_line_map(parent);
+ fill_line_map(parent, commit, patch);
+
+ for (i = 0; i < patch->num; i++) {
+ int l;
+ for (l = 0; l < patch->chunks[i].len2; l++) {
+ int mapped_line =
+ map_line(commit, patch->chunks[i].off2 + l);
+ if (mapped_line != -1) {
+ blame_p[mapped_line]++;
+ if (blame_p[mapped_line] == num_parents)
+ new_lines[new_lines_len++] = mapped_line;
+ }
+ }
+ }
+ free_patch(patch);
+ }
+
+ if (DEBUG)
+ printf("parents: %d\n", num_parents);
+
+ for (i = 0; i < new_lines_len; i++) {
+ int mapped_line = new_lines[i];
+ if (blame_lines[mapped_line] == NULL) {
+ blame_lines[mapped_line] = commit;
+ lines_left--;
+ if (DEBUG)
+ printf("blame: mapped: %d i: %d\n",
+ mapped_line, i);
+ }
+ }
+ } while ((commit = get_revision(rev)) != NULL);
+}
+
+static int compare_tree_path(struct rev_info *revs,
+ struct commit *c1, struct commit *c2)
+{
+ int ret;
+ const char *paths[2];
+ struct util_info *util = c2->util;
+ paths[0] = util->pathname;
+ paths[1] = NULL;
+
+ diff_tree_setup_paths(get_pathspec(revs->prefix, paths),
+ &revs->pruning);
+ ret = rev_compare_tree(revs, c1->tree, c2->tree);
+ diff_tree_release_paths(&revs->pruning);
+ return ret;
+}
+
+static int same_tree_as_empty_path(struct rev_info *revs, struct tree *t1,
+ const char *path)
+{
+ int ret;
+ const char *paths[2];
+ paths[0] = path;
+ paths[1] = NULL;
+
+ diff_tree_setup_paths(get_pathspec(revs->prefix, paths),
+ &revs->pruning);
+ ret = rev_same_tree_as_empty(revs, t1);
+ diff_tree_release_paths(&revs->pruning);
+ return ret;
+}
+
+static const char *find_rename(struct commit *commit, struct commit *parent)
+{
+ struct util_info *cutil = commit->util;
+ struct diff_options diff_opts;
+ const char *paths[1];
+ int i;
+
+ if (DEBUG) {
+ printf("find_rename commit: %s ",
+ sha1_to_hex(commit->object.sha1));
+ puts(sha1_to_hex(parent->object.sha1));
+ }
+
+ diff_setup(&diff_opts);
+ diff_opts.recursive = 1;
+ diff_opts.detect_rename = DIFF_DETECT_RENAME;
+ paths[0] = NULL;
+ diff_tree_setup_paths(paths, &diff_opts);
+ if (diff_setup_done(&diff_opts) < 0)
+ die("diff_setup_done failed");
+
+ diff_tree_sha1(commit->tree->object.sha1, parent->tree->object.sha1,
+ "", &diff_opts);
+ diffcore_std(&diff_opts);
+
+ for (i = 0; i < diff_queued_diff.nr; i++) {
+ struct diff_filepair *p = diff_queued_diff.queue[i];
+
+ if (p->status == 'R' &&
+ !strcmp(p->one->path, cutil->pathname)) {
+ if (DEBUG)
+ printf("rename %s -> %s\n",
+ p->one->path, p->two->path);
+ return p->two->path;
+ }
+ }
+
+ return 0;
+}
+
+static void simplify_commit(struct rev_info *revs, struct commit *commit)
+{
+ struct commit_list **pp, *parent;
+
+ if (!commit->tree)
+ return;
+
+ if (!commit->parents) {
+ struct util_info *util = commit->util;
+ if (!same_tree_as_empty_path(revs, commit->tree,
+ util->pathname))
+ commit->object.flags |= TREECHANGE;
+ return;
+ }
+
+ pp = &commit->parents;
+ while ((parent = *pp) != NULL) {
+ struct commit *p = parent->item;
+
+ if (p->object.flags & UNINTERESTING) {
+ pp = &parent->next;
+ continue;
+ }
+
+ parse_commit(p);
+ switch (compare_tree_path(revs, p, commit)) {
+ case REV_TREE_SAME:
+ parent->next = NULL;
+ commit->parents = parent;
+ get_util(p)->pathname = get_util(commit)->pathname;
+ return;
+
+ case REV_TREE_NEW:
+ {
+ struct util_info *util = commit->util;
+ if (revs->remove_empty_trees &&
+ same_tree_as_empty_path(revs, p->tree,
+ util->pathname)) {
+ const char *new_name = find_rename(commit, p);
+ if (new_name) {
+ struct util_info *putil = get_util(p);
+ if (!putil->pathname)
+ putil->pathname = xstrdup(new_name);
+ }
+ else {
+ *pp = parent->next;
+ continue;
+ }
+ }
+ }
+
+ /* fallthrough */
+ case REV_TREE_DIFFERENT:
+ pp = &parent->next;
+ if (!get_util(p)->pathname)
+ get_util(p)->pathname =
+ get_util(commit)->pathname;
+ continue;
+ }
+ die("bad tree compare for commit %s",
+ sha1_to_hex(commit->object.sha1));
+ }
+ commit->object.flags |= TREECHANGE;
+}
+
+struct commit_info
+{
+ char *author;
+ char *author_mail;
+ unsigned long author_time;
+ char *author_tz;
+
+ /* filled only when asked for details */
+ char *committer;
+ char *committer_mail;
+ unsigned long committer_time;
+ char *committer_tz;
+
+ char *summary;
+};
+
+static void get_ac_line(const char *inbuf, const char *what,
+ int bufsz, char *person, char **mail,
+ unsigned long *time, char **tz)
+{
+ int len;
+ char *tmp, *endp;
+
+ tmp = strstr(inbuf, what);
+ if (!tmp)
+ goto error_out;
+ tmp += strlen(what);
+ endp = strchr(tmp, '\n');
+ if (!endp)
+ len = strlen(tmp);
+ else
+ len = endp - tmp;
+ if (bufsz <= len) {
+ error_out:
+ /* Ugh */
+ person = *mail = *tz = "(unknown)";
+ *time = 0;
+ return;
+ }
+ memcpy(person, tmp, len);
+
+ tmp = person;
+ tmp += len;
+ *tmp = 0;
+ while (*tmp != ' ')
+ tmp--;
+ *tz = tmp+1;
+
+ *tmp = 0;
+ while (*tmp != ' ')
+ tmp--;
+ *time = strtoul(tmp, NULL, 10);
+
+ *tmp = 0;
+ while (*tmp != ' ')
+ tmp--;
+ *mail = tmp + 1;
+ *tmp = 0;
+}
+
+static void get_commit_info(struct commit *commit, struct commit_info *ret, int detailed)
+{
+ int len;
+ char *tmp, *endp;
+ static char author_buf[1024];
+ static char committer_buf[1024];
+ static char summary_buf[1024];
+
+ ret->author = author_buf;
+ get_ac_line(commit->buffer, "\nauthor ",
+ sizeof(author_buf), author_buf, &ret->author_mail,
+ &ret->author_time, &ret->author_tz);
+
+ if (!detailed)
+ return;
+
+ ret->committer = committer_buf;
+ get_ac_line(commit->buffer, "\ncommitter ",
+ sizeof(committer_buf), committer_buf, &ret->committer_mail,
+ &ret->committer_time, &ret->committer_tz);
+
+ ret->summary = summary_buf;
+ tmp = strstr(commit->buffer, "\n\n");
+ if (!tmp) {
+ error_out:
+ sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1));
+ return;
+ }
+ tmp += 2;
+ endp = strchr(tmp, '\n');
+ if (!endp)
+ goto error_out;
+ len = endp - tmp;
+ if (len >= sizeof(summary_buf))
+ goto error_out;
+ memcpy(summary_buf, tmp, len);
+ summary_buf[len] = 0;
+}
+
+static const char *format_time(unsigned long time, const char *tz_str,
+ int show_raw_time)
+{
+ static char time_buf[128];
+ time_t t = time;
+ int minutes, tz;
+ struct tm *tm;
+
+ if (show_raw_time) {
+ sprintf(time_buf, "%lu %s", time, tz_str);
+ return time_buf;
+ }
+
+ tz = atoi(tz_str);
+ minutes = tz < 0 ? -tz : tz;
+ minutes = (minutes / 100)*60 + (minutes % 100);
+ minutes = tz < 0 ? -minutes : minutes;
+ t = time + minutes * 60;
+ tm = gmtime(&t);
+
+ strftime(time_buf, sizeof(time_buf), "%Y-%m-%d %H:%M:%S ", tm);
+ strcat(time_buf, tz_str);
+ return time_buf;
+}
+
+static void topo_setter(struct commit *c, void *data)
+{
+ struct util_info *util = c->util;
+ util->topo_data = data;
+}
+
+static void *topo_getter(struct commit *c)
+{
+ struct util_info *util = c->util;
+ return util->topo_data;
+}
+
+static int read_ancestry(const char *graft_file,
+ unsigned char **start_sha1)
+{
+ FILE *fp = fopen(graft_file, "r");
+ char buf[1024];
+ if (!fp)
+ return -1;
+ while (fgets(buf, sizeof(buf), fp)) {
+ /* The format is just "Commit Parent1 Parent2 ...\n" */
+ int len = strlen(buf);
+ struct commit_graft *graft = read_graft_line(buf, len);
+ register_commit_graft(graft, 0);
+ if (!*start_sha1)
+ *start_sha1 = graft->sha1;
+ }
+ fclose(fp);
+ return 0;
+}
+
+static int lineno_width(int lines)
+{
+ int i, width;
+
+ for (width = 1, i = 10; i <= lines + 1; width++)
+ i *= 10;
+ return width;
+}
+
+static int find_orig_linenum(struct util_info *u, int lineno)
+{
+ int i;
+
+ for (i = 0; i < u->num_lines; i++)
+ if (lineno == u->line_map[i])
+ return i + 1;
+ return 0;
+}
+
+static void emit_meta(struct commit *c, int lno,
+ int sha1_len, int compatibility, int porcelain,
+ int show_name, int show_number, int show_raw_time,
+ int longest_file, int longest_author,
+ int max_digits, int max_orig_digits)
+{
+ struct util_info *u;
+ int lineno;
+ struct commit_info ci;
+
+ u = c->util;
+ lineno = find_orig_linenum(u, lno);
+
+ if (porcelain) {
+ int group_size = -1;
+ struct commit *cc = (lno == 0) ? NULL : blame_lines[lno-1];
+ if (cc != c) {
+ /* This is the beginning of this group */
+ int i;
+ for (i = lno + 1; i < num_blame_lines; i++)
+ if (blame_lines[i] != c)
+ break;
+ group_size = i - lno;
+ }
+ if (0 < group_size)
+ printf("%s %d %d %d\n", sha1_to_hex(c->object.sha1),
+ lineno, lno + 1, group_size);
+ else
+ printf("%s %d %d\n", sha1_to_hex(c->object.sha1),
+ lineno, lno + 1);
+ if (!u->meta_given) {
+ get_commit_info(c, &ci, 1);
+ printf("author %s\n", ci.author);
+ printf("author-mail %s\n", ci.author_mail);
+ printf("author-time %lu\n", ci.author_time);
+ printf("author-tz %s\n", ci.author_tz);
+ printf("committer %s\n", ci.committer);
+ printf("committer-mail %s\n", ci.committer_mail);
+ printf("committer-time %lu\n", ci.committer_time);
+ printf("committer-tz %s\n", ci.committer_tz);
+ printf("filename ");
+ if (quote_c_style(u->pathname, NULL, NULL, 0))
+ quote_c_style(u->pathname, NULL, stdout, 0);
+ else
+ fputs(u->pathname, stdout);
+ printf("\nsummary %s\n", ci.summary);
+
+ u->meta_given = 1;
+ }
+ putchar('\t');
+ return;
+ }
+
+ get_commit_info(c, &ci, 0);
+ fwrite(sha1_to_hex(c->object.sha1), sha1_len, 1, stdout);
+ if (compatibility) {
+ printf("\t(%10s\t%10s\t%d)", ci.author,
+ format_time(ci.author_time, ci.author_tz,
+ show_raw_time),
+ lno + 1);
+ }
+ else {
+ if (show_name)
+ printf(" %-*.*s", longest_file, longest_file,
+ u->pathname);
+ if (show_number)
+ printf(" %*d", max_orig_digits,
+ lineno);
+ printf(" (%-*.*s %10s %*d) ",
+ longest_author, longest_author, ci.author,
+ format_time(ci.author_time, ci.author_tz,
+ show_raw_time),
+ max_digits, lno + 1);
+ }
+}
+
+int main(int argc, const char **argv)
+{
+ int i;
+ struct commit *initial = NULL;
+ unsigned char sha1[20], *sha1_p = NULL;
+
+ const char *filename = NULL, *commit = NULL;
+ char filename_buf[256];
+ int sha1_len = 8;
+ int compatibility = 0;
+ int show_raw_time = 0;
+ int options = 1;
+ struct commit *start_commit;
+
+ const char *args[10];
+ struct rev_info rev;
+
+ struct commit_info ci;
+ const char *buf;
+ int max_digits, max_orig_digits;
+ int longest_file, longest_author, longest_file_lines;
+ int show_name = 0;
+ int show_number = 0;
+ int porcelain = 0;
+
+ const char *prefix = setup_git_directory();
+ git_config(git_default_config);
+
+ for (i = 1; i < argc; i++) {
+ if (options) {
+ if (!strcmp(argv[i], "-h") ||
+ !strcmp(argv[i], "--help"))
+ usage(blame_usage);
+ if (!strcmp(argv[i], "-l") ||
+ !strcmp(argv[i], "--long")) {
+ sha1_len = 40;
+ continue;
+ }
+ if (!strcmp(argv[i], "-c") ||
+ !strcmp(argv[i], "--compatibility")) {
+ compatibility = 1;
+ continue;
+ }
+ if (!strcmp(argv[i], "-t") ||
+ !strcmp(argv[i], "--time")) {
+ show_raw_time = 1;
+ continue;
+ }
+ if (!strcmp(argv[i], "-S")) {
+ if (i + 1 < argc &&
+ !read_ancestry(argv[i + 1], &sha1_p)) {
+ compatibility = 1;
+ i++;
+ continue;
+ }
+ usage(blame_usage);
+ }
+ if (!strcmp(argv[i], "-f") ||
+ !strcmp(argv[i], "--show-name")) {
+ show_name = 1;
+ continue;
+ }
+ if (!strcmp(argv[i], "-n") ||
+ !strcmp(argv[i], "--show-number")) {
+ show_number = 1;
+ continue;
+ }
+ if (!strcmp(argv[i], "-p") ||
+ !strcmp(argv[i], "--porcelain")) {
+ porcelain = 1;
+ sha1_len = 40;
+ show_raw_time = 1;
+ continue;
+ }
+ if (!strcmp(argv[i], "--")) {
+ options = 0;
+ continue;
+ }
+ if (argv[i][0] == '-')
+ usage(blame_usage);
+ options = 0;
+ }
+
+ if (!options) {
+ if (!filename)
+ filename = argv[i];
+ else if (!commit)
+ commit = argv[i];
+ else
+ usage(blame_usage);
+ }
+ }
+
+ if (!filename)
+ usage(blame_usage);
+ if (commit && sha1_p)
+ usage(blame_usage);
+ else if (!commit)
+ commit = "HEAD";
+
+ if (prefix)
+ sprintf(filename_buf, "%s%s", prefix, filename);
+ else
+ strcpy(filename_buf, filename);
+ filename = filename_buf;
+
+ if (!sha1_p) {
+ if (get_sha1(commit, sha1))
+ die("get_sha1 failed, commit '%s' not found", commit);
+ sha1_p = sha1;
+ }
+ start_commit = lookup_commit_reference(sha1_p);
+ get_util(start_commit)->pathname = filename;
+ if (fill_util_info(start_commit)) {
+ printf("%s not found in %s\n", filename, commit);
+ return 1;
+ }
+
+ init_revisions(&rev, setup_git_directory());
+ rev.remove_empty_trees = 1;
+ rev.topo_order = 1;
+ rev.prune_fn = simplify_commit;
+ rev.topo_setter = topo_setter;
+ rev.topo_getter = topo_getter;
+ rev.parents = 1;
+ rev.limited = 1;
+
+ commit_list_insert(start_commit, &rev.commits);
+
+ args[0] = filename;
+ args[1] = NULL;
+ diff_tree_setup_paths(args, &rev.pruning);
+ prepare_revision_walk(&rev);
+ process_commits(&rev, filename, &initial);
+
+ for (i = 0; i < num_blame_lines; i++)
+ if (!blame_lines[i])
+ blame_lines[i] = initial;
+
+ buf = blame_contents;
+ max_digits = lineno_width(num_blame_lines);
+
+ longest_file = 0;
+ longest_author = 0;
+ longest_file_lines = 0;
+ for (i = 0; i < num_blame_lines; i++) {
+ struct commit *c = blame_lines[i];
+ struct util_info *u;
+ u = c->util;
+
+ if (!show_name && strcmp(filename, u->pathname))
+ show_name = 1;
+ if (longest_file < strlen(u->pathname))
+ longest_file = strlen(u->pathname);
+ if (longest_file_lines < u->num_lines)
+ longest_file_lines = u->num_lines;
+ get_commit_info(c, &ci, 0);
+ if (longest_author < strlen(ci.author))
+ longest_author = strlen(ci.author);
+ }
+
+ max_orig_digits = lineno_width(longest_file_lines);
+
+ for (i = 0; i < num_blame_lines; i++) {
+ emit_meta(blame_lines[i], i,
+ sha1_len, compatibility, porcelain,
+ show_name, show_number, show_raw_time,
+ longest_file, longest_author,
+ max_digits, max_orig_digits);
+
+ if (i == num_blame_lines - 1) {
+ fwrite(buf, blame_len - (buf - blame_contents),
+ 1, stdout);
+ if (blame_contents[blame_len-1] != '\n')
+ putc('\n', stdout);
+ }
+ else {
+ char *next_buf = strchr(buf, '\n') + 1;
+ fwrite(buf, next_buf - buf, 1, stdout);
+ buf = next_buf;
+ }
+ }
+
+ if (DEBUG) {
+ printf("num read blob: %d\n", num_read_blob);
+ printf("num get patch: %d\n", num_get_patch);
+ printf("num commits: %d\n", num_commits);
+ printf("patch time: %f\n", patch_time / 1000000.0);
+ printf("initial: %s\n", sha1_to_hex(initial->object.sha1));
+ }
+
+ return 0;
+}
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