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blame -S <ancestry-file>
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This adds the -S <ancestry-file> option to blame, which is
needed by the CVS server emulation.

Signed-off-by: Junio C Hamano <junkio@cox.net>
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Junio C Hamano committed Apr 7, 2006
1 parent a0fd314 commit 5040f17
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Showing 3 changed files with 127 additions and 60 deletions.
42 changes: 37 additions & 5 deletions blame.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -703,11 +703,30 @@ static void* topo_getter(struct commit* c)
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];
Expand Down Expand Up @@ -741,6 +760,14 @@ int main(int argc, const char **argv)
!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;
Expand All @@ -762,7 +789,9 @@ int main(int argc, const char **argv)

if(!filename)
usage(blame_usage);
if(!commit)
if (commit && sha1_p)
usage(blame_usage);
else if(!commit)
commit = "HEAD";

if(prefix)
Expand All @@ -771,9 +800,12 @@ int main(int argc, const char **argv)
strcpy(filename_buf, filename);
filename = filename_buf;

if (get_sha1(commit, sha1))
die("get_sha1 failed, commit '%s' not found", commit);
start_commit = lookup_commit_reference(sha1);
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);
Expand Down
134 changes: 79 additions & 55 deletions commit.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -101,11 +101,7 @@ static unsigned long parse_commit_date(const char *buf)
return date;
}

static struct commit_graft {
unsigned char sha1[20];
int nr_parent;
unsigned char parent[0][20]; /* more */
} **commit_graft;
static struct commit_graft **commit_graft;
static int commit_graft_alloc, commit_graft_nr;

static int commit_graft_pos(const unsigned char *sha1)
Expand All @@ -127,70 +123,98 @@ static int commit_graft_pos(const unsigned char *sha1)
return -lo - 1;
}

static void prepare_commit_graft(void)
int register_commit_graft(struct commit_graft *graft, int ignore_dups)
{
int pos = commit_graft_pos(graft->sha1);

if (0 <= pos) {
if (ignore_dups)
free(graft);
else {
free(commit_graft[pos]);
commit_graft[pos] = graft;
}
return 1;
}
pos = -pos - 1;
if (commit_graft_alloc <= ++commit_graft_nr) {
commit_graft_alloc = alloc_nr(commit_graft_alloc);
commit_graft = xrealloc(commit_graft,
sizeof(*commit_graft) *
commit_graft_alloc);
}
if (pos < commit_graft_nr)
memmove(commit_graft + pos + 1,
commit_graft + pos,
(commit_graft_nr - pos - 1) *
sizeof(*commit_graft));
commit_graft[pos] = graft;
return 0;
}

struct commit_graft *read_graft_line(char *buf, int len)
{
/* The format is just "Commit Parent1 Parent2 ...\n" */
int i;
struct commit_graft *graft = NULL;

if (buf[len-1] == '\n')
buf[--len] = 0;
if (buf[0] == '#')
return 0;
if ((len + 1) % 41) {
bad_graft_data:
error("bad graft data: %s", buf);
free(graft);
return NULL;
}
i = (len + 1) / 41 - 1;
graft = xmalloc(sizeof(*graft) + 20 * i);
graft->nr_parent = i;
if (get_sha1_hex(buf, graft->sha1))
goto bad_graft_data;
for (i = 40; i < len; i += 41) {
if (buf[i] != ' ')
goto bad_graft_data;
if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
goto bad_graft_data;
}
return graft;
}

int read_graft_file(const char *graft_file)
{
char *graft_file = get_graft_file();
FILE *fp = fopen(graft_file, "r");
char buf[1024];
if (!fp) {
commit_graft = (struct commit_graft **) "hack";
return;
}
if (!fp)
return -1;
while (fgets(buf, sizeof(buf), fp)) {
/* The format is just "Commit Parent1 Parent2 ...\n" */
int len = strlen(buf);
int i;
struct commit_graft *graft = NULL;

if (buf[len-1] == '\n')
buf[--len] = 0;
if (buf[0] == '#')
continue;
if ((len + 1) % 41) {
bad_graft_data:
error("bad graft data: %s", buf);
free(graft);
continue;
}
i = (len + 1) / 41 - 1;
graft = xmalloc(sizeof(*graft) + 20 * i);
graft->nr_parent = i;
if (get_sha1_hex(buf, graft->sha1))
goto bad_graft_data;
for (i = 40; i < len; i += 41) {
if (buf[i] != ' ')
goto bad_graft_data;
if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
goto bad_graft_data;
}
i = commit_graft_pos(graft->sha1);
if (0 <= i) {
struct commit_graft *graft = read_graft_line(buf, len);
if (register_commit_graft(graft, 1))
error("duplicate graft data: %s", buf);
free(graft);
continue;
}
i = -i - 1;
if (commit_graft_alloc <= ++commit_graft_nr) {
commit_graft_alloc = alloc_nr(commit_graft_alloc);
commit_graft = xrealloc(commit_graft,
sizeof(*commit_graft) *
commit_graft_alloc);
}
if (i < commit_graft_nr)
memmove(commit_graft + i + 1,
commit_graft + i,
(commit_graft_nr - i - 1) *
sizeof(*commit_graft));
commit_graft[i] = graft;
}
fclose(fp);
return 0;
}

static void prepare_commit_graft(void)
{
static int commit_graft_prepared;
char *graft_file;

if (commit_graft_prepared)
return;
graft_file = get_graft_file();
read_graft_file(graft_file);
commit_graft_prepared = 1;
}

static struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
{
int pos;
if (!commit_graft)
prepare_commit_graft();
prepare_commit_graft();
pos = commit_graft_pos(sha1);
if (pos < 0)
return NULL;
Expand Down
11 changes: 11 additions & 0 deletions commit.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -90,4 +90,15 @@ void sort_in_topological_order(struct commit_list ** list, int lifo);
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_graft {
unsigned char sha1[20];
int nr_parent;
unsigned char parent[FLEX_ARRAY][20]; /* more */
};

struct commit_graft *read_graft_line(char *buf, int len);
int register_commit_graft(struct commit_graft *, int);
int read_graft_file(const char *graft_file);

#endif /* COMMIT_H */

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