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-rw-r--r--combine-diff.c135
1 files changed, 87 insertions, 48 deletions
diff --git a/combine-diff.c b/combine-diff.c
index 9f80a1c5e3..61626912e3 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -6,6 +6,7 @@
#include "quote.h"
#include "xdiff-interface.h"
#include "log-tree.h"
+#include "refs.h"
static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr, int n, int num_parent)
{
@@ -23,7 +24,7 @@ static struct combine_diff_path *intersect_paths(struct combine_diff_path *curr,
path = q->queue[i]->two->path;
len = strlen(path);
p = xmalloc(combine_diff_path_size(num_parent, len));
- p->path = (char*) &(p->parent[num_parent]);
+ p->path = (char *) &(p->parent[num_parent]);
memcpy(p->path, path, len);
p->path[len] = 0;
p->len = len;
@@ -79,6 +80,7 @@ struct lline {
/* Lines surviving in the merge result */
struct sline {
struct lline *lost_head, **lost_tail;
+ struct lline *next_lost;
char *bol;
int len;
/* bit 0 up to (N-1) are on if the parent has this line (i.e.
@@ -90,18 +92,24 @@ struct sline {
unsigned long *p_lno;
};
-static char *grab_blob(const unsigned char *sha1, unsigned long *size)
+static char *grab_blob(const unsigned char *sha1, unsigned int mode, unsigned long *size)
{
char *blob;
enum object_type type;
- if (is_null_sha1(sha1)) {
+
+ if (S_ISGITLINK(mode)) {
+ blob = xmalloc(100);
+ *size = snprintf(blob, 100,
+ "Subproject commit %s\n", sha1_to_hex(sha1));
+ } else if (is_null_sha1(sha1)) {
/* deleted blob */
*size = 0;
return xcalloc(1, 1);
+ } else {
+ blob = read_sha1_file(sha1, &type, size);
+ if (type != OBJ_BLOB)
+ die("object '%s' is not a blob!", sha1_to_hex(sha1));
}
- blob = read_sha1_file(sha1, &type, size);
- if (type != OBJ_BLOB)
- die("object '%s' is not a blob!", sha1_to_hex(sha1));
return blob;
}
@@ -114,18 +122,12 @@ static void append_lost(struct sline *sline, int n, const char *line, int len)
/* Check to see if we can squash things */
if (sline->lost_head) {
- struct lline *last_one = NULL;
- /* We cannot squash it with earlier one */
- for (lline = sline->lost_head;
- lline;
- lline = lline->next)
- if (lline->parent_map & this_mask)
- last_one = lline;
- lline = last_one ? last_one->next : sline->lost_head;
+ lline = sline->next_lost;
while (lline) {
if (lline->len == len &&
!memcmp(lline->line, line, len)) {
lline->parent_map |= this_mask;
+ sline->next_lost = lline->next;
return;
}
lline = lline->next;
@@ -140,11 +142,10 @@ static void append_lost(struct sline *sline, int n, const char *line, int len)
lline->line[len] = 0;
*sline->lost_tail = lline;
sline->lost_tail = &lline->next;
+ sline->next_lost = NULL;
}
struct combine_diff_state {
- struct xdiff_emit_state xm;
-
unsigned int lno;
int ob, on, nb, nn;
unsigned long nmask;
@@ -163,25 +164,28 @@ static void consume_line(void *state_, char *line, unsigned long len)
&state->nb, &state->nn))
return;
state->lno = state->nb;
- if (!state->nb)
- /* @@ -1,2 +0,0 @@ to remove the
- * first two lines...
- */
- state->nb = 1;
- if (state->nn == 0)
+ if (state->nn == 0) {
/* @@ -X,Y +N,0 @@ removed Y lines
* that would have come *after* line N
* in the result. Our lost buckets hang
* to the line after the removed lines,
+ *
+ * Note that this is correct even when N == 0,
+ * in which case the hunk removes the first
+ * line in the file.
*/
state->lost_bucket = &state->sline[state->nb];
- else
+ if (!state->nb)
+ state->nb = 1;
+ } else {
state->lost_bucket = &state->sline[state->nb-1];
+ }
if (!state->sline[state->nb-1].p_lno)
state->sline[state->nb-1].p_lno =
xcalloc(state->num_parent,
sizeof(unsigned long));
state->sline[state->nb-1].p_lno[state->n] = state->ob;
+ state->lost_bucket->next_lost = state->lost_bucket->lost_head;
return;
}
if (!state->lost_bucket)
@@ -197,7 +201,8 @@ static void consume_line(void *state_, char *line, unsigned long len)
}
}
-static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
+static void combine_diff(const unsigned char *parent, unsigned int mode,
+ mmfile_t *result_file,
struct sline *sline, unsigned int cnt, int n,
int num_parent)
{
@@ -213,21 +218,20 @@ static void combine_diff(const unsigned char *parent, mmfile_t *result_file,
if (!cnt)
return; /* result deleted */
- parent_file.ptr = grab_blob(parent, &sz);
+ parent_file.ptr = grab_blob(parent, mode, &sz);
parent_file.size = sz;
+ memset(&xpp, 0, sizeof(xpp));
xpp.flags = XDF_NEED_MINIMAL;
memset(&xecfg, 0, sizeof(xecfg));
- ecb.outf = xdiff_outf;
- ecb.priv = &state;
memset(&state, 0, sizeof(state));
- state.xm.consume = consume_line;
state.nmask = nmask;
state.sline = sline;
state.lno = 1;
state.num_parent = num_parent;
state.n = n;
- xdi_diff(&parent_file, result_file, &xpp, &xecfg, &ecb);
+ xdi_diff_outf(&parent_file, result_file, consume_line, &state,
+ &xpp, &xecfg, &ecb);
free(parent_file.ptr);
/* Assign line numbers for this parent.
@@ -500,6 +504,18 @@ static int hunk_comment_line(const char *bol)
return (isalpha(ch) || ch == '_' || ch == '$');
}
+static void show_line_to_eol(const char *line, int len, const char *reset)
+{
+ int saw_cr_at_eol = 0;
+ if (len < 0)
+ len = strlen(line);
+ saw_cr_at_eol = (len && line[len-1] == '\r');
+
+ printf("%.*s%s%s\n", len - saw_cr_at_eol, line,
+ reset,
+ saw_cr_at_eol ? "\r" : "");
+}
+
static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
int use_color)
{
@@ -508,6 +524,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
int i;
unsigned long lno = 0;
const char *c_frag = diff_get_color(use_color, DIFF_FRAGINFO);
+ const char *c_func = diff_get_color(use_color, DIFF_FUNCINFO);
const char *c_new = diff_get_color(use_color, DIFF_FILE_NEW);
const char *c_old = diff_get_color(use_color, DIFF_FILE_OLD);
const char *c_plain = diff_get_color(use_color, DIFF_PLAIN);
@@ -517,7 +534,6 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
return; /* result deleted */
while (1) {
- struct sline *sl = &sline[lno];
unsigned long hunk_end;
unsigned long rlines;
const char *hunk_comment = NULL;
@@ -573,7 +589,9 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
comment_end = i;
}
if (comment_end)
- putchar(' ');
+ printf("%s%s %s%s", c_reset,
+ c_plain, c_reset,
+ c_func);
for (i = 0; i < comment_end; i++)
putchar(hunk_comment[i]);
}
@@ -583,7 +601,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
struct lline *ll;
int j;
unsigned long p_mask;
- sl = &sline[lno++];
+ struct sline *sl = &sline[lno++];
ll = (sl->flag & no_pre_delete) ? NULL : sl->lost_head;
while (ll) {
fputs(c_old, stdout);
@@ -593,7 +611,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
else
putchar(' ');
}
- printf("%s%s\n", ll->line, c_reset);
+ show_line_to_eol(ll->line, -1, c_reset);
ll = ll->next;
}
if (cnt < lno)
@@ -617,7 +635,7 @@ static void dump_sline(struct sline *sline, unsigned long cnt, int num_parent,
putchar(' ');
p_mask <<= 1;
}
- printf("%.*s%s\n", sl->len, sl->bol, c_reset);
+ show_line_to_eol(sl->bol, sl->len, c_reset);
}
}
}
@@ -675,12 +693,16 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
int i, show_hunks;
int working_tree_file = is_null_sha1(elem->sha1);
int abbrev = DIFF_OPT_TST(opt, FULL_INDEX) ? 40 : DEFAULT_ABBREV;
+ const char *a_prefix, *b_prefix;
mmfile_t result_file;
context = opt->context;
+ a_prefix = opt->a_prefix ? opt->a_prefix : "a/";
+ b_prefix = opt->b_prefix ? opt->b_prefix : "b/";
+
/* Read the result of merge first */
if (!working_tree_file)
- result = grab_blob(elem->sha1, &result_size);
+ result = grab_blob(elem->sha1, elem->mode, &result_size);
else {
/* Used by diff-tree to read from the working tree */
struct stat st;
@@ -690,19 +712,23 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
goto deleted_file;
if (S_ISLNK(st.st_mode)) {
- size_t len = xsize_t(st.st_size);
- result_size = len;
- result = xmalloc(len + 1);
- if (result_size != readlink(elem->path, result, len)) {
+ struct strbuf buf = STRBUF_INIT;
+
+ if (strbuf_readlink(&buf, elem->path, st.st_size) < 0) {
error("readlink(%s): %s", elem->path,
strerror(errno));
return;
}
- result[len] = 0;
+ result_size = buf.len;
+ result = strbuf_detach(&buf, NULL);
elem->mode = canon_mode(st.st_mode);
- }
- else if (0 <= (fd = open(elem->path, O_RDONLY)) &&
- !fstat(fd, &st)) {
+ } else if (S_ISDIR(st.st_mode)) {
+ unsigned char sha1[20];
+ if (resolve_gitlink_ref(elem->path, "HEAD", sha1) < 0)
+ result = grab_blob(elem->sha1, elem->mode, &result_size);
+ else
+ result = grab_blob(sha1, elem->mode, &result_size);
+ } else if (0 <= (fd = open(elem->path, O_RDONLY))) {
size_t len = xsize_t(st.st_size);
ssize_t done;
int is_file, i;
@@ -722,11 +748,22 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
done = read_in_full(fd, result, len);
if (done < 0)
- die("read error '%s'", elem->path);
+ die_errno("read error '%s'", elem->path);
else if (done < len)
die("early EOF '%s'", elem->path);
result[len] = 0;
+
+ /* If not a fake symlink, apply filters, e.g. autocrlf */
+ if (is_file) {
+ struct strbuf buf = STRBUF_INIT;
+
+ if (convert_to_git(elem->path, result, len, &buf, safe_crlf)) {
+ free(result);
+ result = strbuf_detach(&buf, &len);
+ result_size = len;
+ }
+ }
}
else {
deleted_file:
@@ -783,7 +820,9 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
}
}
if (i <= j)
- combine_diff(elem->parent[i].sha1, &result_file, sline,
+ combine_diff(elem->parent[i].sha1,
+ elem->parent[i].mode,
+ &result_file, sline,
cnt, i, num_parent);
if (elem->parent[i].mode != elem->mode)
mode_differs = 1;
@@ -841,13 +880,13 @@ static void show_patch_diff(struct combine_diff_path *elem, int num_parent,
dump_quoted_path("--- ", "", "/dev/null",
c_meta, c_reset);
else
- dump_quoted_path("--- ", opt->a_prefix, elem->path,
+ dump_quoted_path("--- ", a_prefix, elem->path,
c_meta, c_reset);
if (deleted)
dump_quoted_path("+++ ", "", "/dev/null",
c_meta, c_reset);
else
- dump_quoted_path("+++ ", opt->b_prefix, elem->path,
+ dump_quoted_path("+++ ", b_prefix, elem->path,
c_meta, c_reset);
dump_sline(sline, cnt, num_parent,
DIFF_OPT_TST(opt, COLOR_DIFF));
@@ -1026,7 +1065,7 @@ void diff_tree_combined_merge(const unsigned char *sha1,
for (parents = commit->parents, num_parent = 0;
parents;
parents = parents->next, num_parent++)
- hashcpy((unsigned char*)(parent + num_parent),
+ hashcpy((unsigned char *)(parent + num_parent),
parents->item->object.sha1);
diff_tree_combined(sha1, parent, num_parent, dense, rev);
}
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