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diff --stat: do not drop rename information. 

When a verbatim rename or copy is detected, we did not show
anything on the "diff --stat" for the filepair.  This makes it
to show the rename information.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-04-19 20:41:14 -07:00
parent a4d0cced53
commit 44aad15f0d
1 changed files with 68 additions and 9 deletions
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77
diff-lib.c
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@ -195,6 +195,56 @@ static int fn_out(void *priv, mmbuffer_t *mb, int nbuf)
return 0;
}
static char *pprint_rename(const char *a, const char *b)
{
const char *old = a;
const char *new = b;
char *name = NULL;
int pfx_length, sfx_length;
int len_a = strlen(a);
int len_b = strlen(b);
/* Find common prefix */
pfx_length = 0;
while (*old && *new && *old == *new) {
if (*old == '/')
pfx_length = old - a + 1;
old++;
new++;
}
/* Find common suffix */
old = a + len_a;
new = b + len_b;
sfx_length = 0;
while (a <= old && b <= new && *old == *new) {
if (*old == '/')
sfx_length = len_a - (old - a);
old--;
new--;
}
/*
* pfx{mid-a => mid-b}sfx
* {pfx-a => pfx-b}sfx
* pfx{sfx-a => sfx-b}
* name-a => name-b
*/
if (pfx_length + sfx_length) {
name = xmalloc(len_a + len_b - pfx_length - sfx_length + 7);
sprintf(name, "%.*s{%.*s => %.*s}%s",
pfx_length, a,
len_a - pfx_length - sfx_length, a + pfx_length,
len_b - pfx_length - sfx_length, b + pfx_length,
a + len_a - sfx_length);
}
else {
name = xmalloc(len_a + len_b + 5);
sprintf(name, "%s => %s", a, b);
}
return name;
}
struct diffstat_t {
struct xdiff_emit_state xm;
@ -204,12 +254,14 @@ struct diffstat_t {
char *name;
unsigned is_unmerged:1;
unsigned is_binary:1;
unsigned is_renamed:1;
unsigned int added, deleted;
} **files;
};
static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
const char *name)
const char *name_a,
const char *name_b)
{
struct diffstat_file *x;
x = xcalloc(sizeof (*x), 1);
@ -219,7 +271,12 @@ static struct diffstat_file *diffstat_add(struct diffstat_t *diffstat,
diffstat->alloc * sizeof(x));
}
diffstat->files[diffstat->nr++] = x;
x->name = strdup(name);
if (name_b) {
x->name = pprint_rename(name_a, name_b);
x->is_renamed = 1;
}
else
x->name = strdup(name_a);
return x;
}
@ -305,7 +362,8 @@ static void show_stats(struct diffstat_t* data)
printf(" %s%-*s | Unmerged\n", prefix, len, name);
goto free_diffstat_file;
}
else if (added + deleted == 0) {
else if (!data->files[i]->is_renamed &&
(added + deleted == 0)) {
total_files--;
goto free_diffstat_file;
}
@ -425,13 +483,14 @@ static void builtin_diff(const char *name_a,
}
static void builtin_diffstat(const char *name_a, const char *name_b,
struct diff_filespec *one, struct diff_filespec *two,
struct diffstat_t *diffstat)
struct diff_filespec *one,
struct diff_filespec *two,
struct diffstat_t *diffstat)
{
mmfile_t mf1, mf2;
struct diffstat_file *data;
data = diffstat_add(diffstat, name_a ? name_a : name_b);
data = diffstat_add(diffstat, name_a, name_b);
if (!one || !two) {
data->is_unmerged = 1;
@ -992,7 +1051,7 @@ static void run_diff(struct diff_filepair *p, struct diff_options *o)
}
static void run_diffstat(struct diff_filepair *p, struct diff_options *o,
struct diffstat_t *diffstat)
struct diffstat_t *diffstat)
{
const char *name;
const char *other;
@ -1374,7 +1433,7 @@ static void diff_flush_patch(struct diff_filepair *p, struct diff_options *o)
}
static void diff_flush_stat(struct diff_filepair *p, struct diff_options *o,
struct diffstat_t *diffstat)
struct diffstat_t *diffstat)
{
if (diff_unmodified_pair(p))
return;
@ -1559,7 +1618,7 @@ void diff_flush(struct diff_options *options)
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];
flush_one_pair(p, DIFF_FORMAT_DIFFSTAT, options,
diffstat);
diffstat);
}
show_stats(diffstat);
free(diffstat);