#include "tree.h"
#include "blob.h"
#include "diff.h"
+#include "diffcore.h"
#include "revision.h"
+#include "xdiff-interface.h"
#define DEBUG 0
char *buf;
unsigned long size;
int num_lines;
-// const char* path;
+ const char* pathname;
+
+ void* topo_data;
};
struct chunk {
static int num_commits = 0;
static int patch_time = 0;
-#define TEMPFILE_PATH_LEN 60
-static struct patch *get_patch(struct commit *commit, struct commit *other)
-{
+struct blame_diff_state {
+ struct xdiff_emit_state xm;
struct patch *ret;
- struct util_info *info_c = (struct util_info *)commit->object.util;
- struct util_info *info_o = (struct util_info *)other->object.util;
- char tmp_path1[TEMPFILE_PATH_LEN], tmp_path2[TEMPFILE_PATH_LEN];
- char diff_cmd[TEMPFILE_PATH_LEN*2 + 20];
- struct timeval tv_start, tv_end;
- int fd;
- FILE *fin;
- char buf[1024];
-
- ret = xmalloc(sizeof(struct patch));
- ret->chunks = NULL;
- ret->num = 0;
-
- get_blob(commit);
- get_blob(other);
+};
- gettimeofday(&tv_start, NULL);
+static void process_u0_diff(void *state_, char *line, unsigned long len)
+{
+ struct blame_diff_state *state = state_;
+ struct chunk *chunk;
- fd = git_mkstemp(tmp_path1, TEMPFILE_PATH_LEN, "git-blame-XXXXXX");
- if (fd < 0)
- die("unable to create temp-file: %s", strerror(errno));
+ if (len < 4 || line[0] != '@' || line[1] != '@')
+ return;
- if (xwrite(fd, info_c->buf, info_c->size) != info_c->size)
- die("write failed: %s", strerror(errno));
- close(fd);
+ 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;
+ }
- fd = git_mkstemp(tmp_path2, TEMPFILE_PATH_LEN, "git-blame-XXXXXX");
- if (fd < 0)
- die("unable to create temp-file: %s", strerror(errno));
+ if (chunk->len1 == 0)
+ chunk->off1++;
+ if (chunk->len2 == 0)
+ chunk->off2++;
- if (xwrite(fd, info_o->buf, info_o->size) != info_o->size)
- die("write failed: %s", strerror(errno));
- close(fd);
+ if (chunk->off1 > 0)
+ chunk->off1--;
+ if (chunk->off2 > 0)
+ chunk->off2--;
- sprintf(diff_cmd, "diff -U 0 %s %s", tmp_path1, tmp_path2);
- fin = popen(diff_cmd, "r");
- if (!fin)
- die("popen failed: %s", strerror(errno));
+ assert(chunk->off1 >= 0);
+ assert(chunk->off2 >= 0);
+}
- while (fgets(buf, sizeof(buf), fin)) {
- struct chunk *chunk;
- char *start, *sp;
+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->object.util;
+ struct util_info *info_o = (struct util_info *)other->object.util;
+ struct timeval tv_start, tv_end;
- if (buf[0] != '@' || buf[1] != '@')
- continue;
+ get_blob(commit);
+ file_c.ptr = info_c->buf;
+ file_c.size = info_c->size;
- if (DEBUG)
- printf("chunk line: %s", buf);
- ret->num++;
- ret->chunks = xrealloc(ret->chunks,
- sizeof(struct chunk) * ret->num);
- chunk = &ret->chunks[ret->num - 1];
-
- assert(!strncmp(buf, "@@ -", 4));
-
- start = buf + 4;
- sp = index(start, ' ');
- *sp = '\0';
- if (index(start, ',')) {
- int ret =
- sscanf(start, "%d,%d", &chunk->off1, &chunk->len1);
- assert(ret == 2);
- } else {
- int ret = sscanf(start, "%d", &chunk->off1);
- assert(ret == 1);
- chunk->len1 = 1;
- }
- *sp = ' ';
-
- start = sp + 1;
- sp = index(start, ' ');
- *sp = '\0';
- if (index(start, ',')) {
- int ret =
- sscanf(start, "%d,%d", &chunk->off2, &chunk->len2);
- assert(ret == 2);
- } else {
- int ret = sscanf(start, "%d", &chunk->off2);
- assert(ret == 1);
- chunk->len2 = 1;
- }
- *sp = ' ';
+ get_blob(other);
+ file_o.ptr = info_o->buf;
+ file_o.size = info_o->size;
- if (chunk->len1 == 0)
- chunk->off1++;
- if (chunk->len2 == 0)
- chunk->off2++;
+ gettimeofday(&tv_start, NULL);
- if (chunk->off1 > 0)
- chunk->off1--;
- if (chunk->off2 > 0)
- chunk->off2--;
+ 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;
- assert(chunk->off1 >= 0);
- assert(chunk->off2 >= 0);
- }
- pclose(fin);
- unlink(tmp_path1);
- unlink(tmp_path2);
+ 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 ret;
+ return state.ret;
}
static void free_patch(struct patch *p)
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)
{
int i;
const char *pathspec[2];
+ blame_file = pathname;
pathspec[0] = pathname;
pathspec[1] = NULL;
memset(blob_sha1, 0, sizeof(blob_sha1));
if (S_ISDIR(mode))
return READ_TREE_RECURSIVE;
+ if (strncmp(blame_file, base, baselen) ||
+ strcmp(blame_file + baselen, pathname))
+ return -1;
+
memcpy(blob_sha1, sha1, 20);
return -1;
}
info->buf = read_sha1_file(info->sha1, type, &info->size);
- assert(!strcmp(type, "blob"));
+ assert(!strcmp(type, blob_type));
}
/* For debugging only */
return info->line_map[line];
}
-static int fill_util_info(struct commit *commit, const char *path)
+static struct util_info* get_util(struct commit *commit)
{
- struct util_info *util;
- if (commit->object.util)
- return 0;
+ struct util_info *util = commit->object.util;
+
+ if (util)
+ return util;
util = xmalloc(sizeof(struct util_info));
+ util->buf = NULL;
+ util->size = 0;
+ util->line_map = NULL;
+ util->num_lines = -1;
+ util->pathname = NULL;
+ commit->object.util = util;
+ return util;
+}
+
+static int fill_util_info(struct commit *commit)
+{
+ struct util_info *util = commit->object.util;
- if (get_blob_sha1(commit->tree, path, util->sha1)) {
- free(util);
+ assert(util);
+ assert(util->pathname);
+
+ if (get_blob_sha1(commit->tree, util->pathname, util->sha1))
return 1;
- } else {
- util->buf = NULL;
- util->size = 0;
- util->line_map = NULL;
- util->num_lines = -1;
- commit->object.util = util;
+ else
return 0;
- }
}
static void alloc_line_map(struct commit *commit)
static void init_first_commit(struct commit* commit, const char* filename)
{
- struct util_info* util;
+ struct util_info* util = commit->object.util;
int i;
- if (fill_util_info(commit, filename))
+ util->pathname = filename;
+ if (fill_util_info(commit))
die("fill_util_info failed");
alloc_line_map(commit);
if(num_parents == 0)
*initial = commit;
- if(fill_util_info(commit, path))
+ if (fill_util_info(commit))
continue;
alloc_line_map(commit);
printf("parent: %s\n",
sha1_to_hex(parent->object.sha1));
- if(fill_util_info(parent, path)) {
+ if (fill_util_info(parent)) {
num_parents--;
continue;
}
} 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->object.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->object.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->object.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->object.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 = strdup(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;
static char author_buf[1024];
tmp = strstr(commit->buffer, "\nauthor ") + 8;
- len = index(tmp, '\n') - tmp;
+ len = strchr(tmp, '\n') - tmp;
ret->author = author_buf;
memcpy(ret->author, tmp, len);
return time_buf;
}
+static void topo_setter(struct commit* c, void* data)
+{
+ struct util_info* util = c->object.util;
+ util->topo_data = data;
+}
+
+static void* topo_getter(struct commit* c)
+{
+ struct util_info* util = c->object.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;
+}
+
int main(int argc, const char **argv)
{
int i;
struct commit *initial = NULL;
- unsigned char sha1[20];
+ unsigned char sha1[20], *sha1_p = NULL;
const char *filename = NULL, *commit = NULL;
char filename_buf[256];
int sha1_len = 8;
int compability = 0;
int options = 1;
+ struct commit* start_commit;
- int num_args;
const char* args[10];
struct rev_info rev;
struct commit_info ci;
const char *buf;
int max_digits;
+ int longest_file, longest_author;
+ int found_rename;
const char* prefix = setup_git_directory();
+ git_config(git_default_config);
for(i = 1; i < argc; i++) {
if(options) {
!strcmp(argv[i], "--compability")) {
compability = 1;
continue;
+ } else if(!strcmp(argv[i], "-S")) {
+ if (i + 1 < argc &&
+ !read_ancestry(argv[i + 1], &sha1_p)) {
+ compability = 1;
+ i++;
+ continue;
+ }
+ usage(blame_usage);
} else if(!strcmp(argv[i], "--")) {
options = 0;
continue;
if(!filename)
usage(blame_usage);
- if(!commit)
+ if (commit && sha1_p)
+ usage(blame_usage);
+ else if(!commit)
commit = "HEAD";
if(prefix)
strcpy(filename_buf, filename);
filename = filename_buf;
- {
- struct commit* c;
+ if (!sha1_p) {
if (get_sha1(commit, sha1))
die("get_sha1 failed, commit '%s' not found", commit);
- c = lookup_commit_reference(sha1);
-
- if (fill_util_info(c, filename)) {
- printf("%s not found in %s\n", filename, commit);
- return 1;
- }
+ 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;
}
- num_args = 0;
- args[num_args++] = NULL;
- args[num_args++] = "--topo-order";
- args[num_args++] = "--remove-empty";
- args[num_args++] = commit;
- args[num_args++] = "--";
- args[num_args++] = filename;
- args[num_args] = NULL;
- setup_revisions(num_args, args, &rev, "HEAD");
+ init_revisions(&rev);
+ 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 (max_digits = 1, i = 10; i <= num_blame_lines + 1; max_digits++)
i *= 10;
+ longest_file = 0;
+ longest_author = 0;
+ found_rename = 0;
+ for (i = 0; i < num_blame_lines; i++) {
+ struct commit *c = blame_lines[i];
+ struct util_info* u;
+ if (!c)
+ c = initial;
+ u = c->object.util;
+
+ if (!found_rename && strcmp(filename, u->pathname))
+ found_rename = 1;
+ if (longest_file < strlen(u->pathname))
+ longest_file = strlen(u->pathname);
+ get_commit_info(c, &ci);
+ if (longest_author < strlen(ci.author))
+ longest_author = strlen(ci.author);
+ }
+
for (i = 0; i < num_blame_lines; i++) {
struct commit *c = blame_lines[i];
+ struct util_info* u;
+
if (!c)
c = initial;
+ u = c->object.util;
get_commit_info(c, &ci);
fwrite(sha1_to_hex(c->object.sha1), sha1_len, 1, stdout);
- if(compability)
+ if(compability) {
printf("\t(%10s\t%10s\t%d)", ci.author,
format_time(ci.author_time, ci.author_tz), i+1);
- else
- printf(" (%-15.15s %10s %*d) ", ci.author,
+ } else {
+ if (found_rename)
+ printf(" %-*.*s", longest_file, longest_file,
+ u->pathname);
+ printf(" (%-*.*s %10s %*d) ",
+ longest_author, longest_author, ci.author,
format_time(ci.author_time, ci.author_tz),
max_digits, i+1);
+ }
if(i == num_blame_lines - 1) {
fwrite(buf, blame_len - (buf - blame_contents),
if(blame_contents[blame_len-1] != '\n')
putc('\n', stdout);
} else {
- char* next_buf = index(buf, '\n') + 1;
+ char* next_buf = strchr(buf, '\n') + 1;
fwrite(buf, next_buf - buf, 1, stdout);
buf = next_buf;
}