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diff --git a/ll-merge.c b/ll-merge.c
index fa2ca5250c75a0d335570a3a3c71b20ebd0b42fa..da59738c9b787ae082ad062a91345a60628e704a 100644 (file)
--- a/ll-merge.c
+++ b/ll-merge.c
typedef int (*ll_merge_fn)(const struct ll_merge_driver *,
mmbuffer_t *result,
const char *path,
- mmfile_t *orig,
+ mmfile_t *orig, const char *orig_name,
mmfile_t *src1, const char *name1,
mmfile_t *src2, const char *name2,
- int virtual_ancestor);
+ const struct ll_merge_options *opts,
+ int marker_size);
struct ll_merge_driver {
const char *name;
static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
mmbuffer_t *result,
const char *path_unused,
- mmfile_t *orig,
+ mmfile_t *orig, const char *orig_name,
mmfile_t *src1, const char *name1,
mmfile_t *src2, const char *name2,
- int virtual_ancestor)
+ const struct ll_merge_options *opts,
+ int marker_size)
{
+ mmfile_t *stolen;
+ assert(opts);
+
/*
* The tentative merge result is "ours" for the final round,
* or common ancestor for an internal merge. Still return
* "conflicted merge" status.
*/
- mmfile_t *stolen = virtual_ancestor ? orig : src1;
+ stolen = opts->virtual_ancestor ? orig : src1;
result->ptr = stolen->ptr;
result->size = stolen->size;
static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
mmbuffer_t *result,
- const char *path_unused,
- mmfile_t *orig,
+ const char *path,
+ mmfile_t *orig, const char *orig_name,
mmfile_t *src1, const char *name1,
mmfile_t *src2, const char *name2,
- int virtual_ancestor)
+ const struct ll_merge_options *opts,
+ int marker_size)
{
- xpparam_t xpp;
- int style = 0;
+ xmparam_t xmp;
+ assert(opts);
if (buffer_is_binary(orig->ptr, orig->size) ||
buffer_is_binary(src1->ptr, src1->size) ||
buffer_is_binary(src2->ptr, src2->size)) {
- warning("Cannot merge binary files: %s vs. %s\n",
- name1, name2);
+ warning("Cannot merge binary files: %s (%s vs. %s)\n",
+ path, name1, name2);
return ll_binary_merge(drv_unused, result,
- path_unused,
- orig, src1, name1,
+ path,
+ orig, orig_name,
+ src1, name1,
src2, name2,
- virtual_ancestor);
+ opts, marker_size);
}
- memset(&xpp, 0, sizeof(xpp));
+ memset(&xmp, 0, sizeof(xmp));
+ xmp.level = XDL_MERGE_ZEALOUS;
+ xmp.favor = opts->variant;
+ xmp.xpp.flags = opts->xdl_opts;
if (git_xmerge_style >= 0)
- style = git_xmerge_style;
- return xdl_merge(orig,
- src1, name1,
- src2, name2,
- &xpp, XDL_MERGE_ZEALOUS | style,
- result);
+ xmp.style = git_xmerge_style;
+ if (marker_size > 0)
+ xmp.marker_size = marker_size;
+ xmp.ancestor = orig_name;
+ xmp.file1 = name1;
+ xmp.file2 = name2;
+ return xdl_merge(orig, src1, src2, &xmp, result);
}
static int ll_union_merge(const struct ll_merge_driver *drv_unused,
mmbuffer_t *result,
const char *path_unused,
- mmfile_t *orig,
+ mmfile_t *orig, const char *orig_name,
mmfile_t *src1, const char *name1,
mmfile_t *src2, const char *name2,
- int virtual_ancestor)
+ const struct ll_merge_options *opts,
+ int marker_size)
{
- char *src, *dst;
- long size;
- const int marker_size = 7;
- int status, saved_style;
-
- /* We have to force the RCS "merge" style */
- saved_style = git_xmerge_style;
- git_xmerge_style = 0;
- status = ll_xdl_merge(drv_unused, result, path_unused,
- orig, src1, NULL, src2, NULL,
- virtual_ancestor);
- git_xmerge_style = saved_style;
- if (status <= 0)
- return status;
- size = result->size;
- src = dst = result->ptr;
- while (size) {
- char ch;
- if ((marker_size < size) &&
- (*src == '<' || *src == '=' || *src == '>')) {
- int i;
- ch = *src;
- for (i = 0; i < marker_size; i++)
- if (src[i] != ch)
- goto not_a_marker;
- if (src[marker_size] != '\n')
- goto not_a_marker;
- src += marker_size + 1;
- size -= marker_size + 1;
- continue;
- }
- not_a_marker:
- do {
- ch = *src++;
- *dst++ = ch;
- size--;
- } while (ch != '\n' && size);
- }
- result->size = dst - result->ptr;
- return 0;
+ /* Use union favor */
+ struct ll_merge_options o;
+ assert(opts);
+ o = *opts;
+ o.variant = XDL_MERGE_FAVOR_UNION;
+ return ll_xdl_merge(drv_unused, result, path_unused,
+ orig, NULL, src1, NULL, src2, NULL,
+ &o, marker_size);
}
#define LL_BINARY_MERGE 0
strcpy(path, ".merge_file_XXXXXX");
fd = xmkstemp(path);
if (write_in_full(fd, src->ptr, src->size) != src->size)
- die("unable to write temp-file");
+ die_errno("unable to write temp-file");
close(fd);
}
static int ll_ext_merge(const struct ll_merge_driver *fn,
mmbuffer_t *result,
const char *path,
- mmfile_t *orig,
+ mmfile_t *orig, const char *orig_name,
mmfile_t *src1, const char *name1,
mmfile_t *src2, const char *name2,
- int virtual_ancestor)
+ const struct ll_merge_options *opts,
+ int marker_size)
{
- char temp[3][50];
+ char temp[4][50];
struct strbuf cmd = STRBUF_INIT;
- struct strbuf_expand_dict_entry dict[] = {
- { "O", temp[0] },
- { "A", temp[1] },
- { "B", temp[2] },
- { NULL }
- };
- struct child_process child;
- const char *args[20];
+ struct strbuf_expand_dict_entry dict[5];
+ const char *args[] = { NULL, NULL };
int status, fd, i;
struct stat st;
+ assert(opts);
+
+ dict[0].placeholder = "O"; dict[0].value = temp[0];
+ dict[1].placeholder = "A"; dict[1].value = temp[1];
+ dict[2].placeholder = "B"; dict[2].value = temp[2];
+ dict[3].placeholder = "L"; dict[3].value = temp[3];
+ dict[4].placeholder = NULL; dict[4].value = NULL;
if (fn->cmdline == NULL)
die("custom merge driver %s lacks command line.", fn->name);
create_temp(orig, temp[0]);
create_temp(src1, temp[1]);
create_temp(src2, temp[2]);
+ sprintf(temp[3], "%d", marker_size);
strbuf_expand(&cmd, fn->cmdline, strbuf_expand_dict_cb, &dict);
- memset(&child, 0, sizeof(child));
- child.argv = args;
- args[0] = "sh";
- args[1] = "-c";
- args[2] = cmd.buf;
- args[3] = NULL;
-
- status = run_command(&child);
- if (status < -ERR_RUN_COMMAND_FORK)
- ; /* failure in run-command */
- else
- status = -status;
+ args[0] = cmd.buf;
+ status = run_command_v_opt(args, RUN_USING_SHELL);
fd = open(temp[1], O_RDONLY);
if (fd < 0)
goto bad;
close(fd);
bad:
for (i = 0; i < 3; i++)
- unlink(temp[i]);
+ unlink_or_warn(temp[i]);
strbuf_release(&cmd);
return status;
}
if (!strcmp(var, "merge.default")) {
if (value)
- default_ll_merge = strdup(value);
+ default_ll_merge = xstrdup(value);
return 0;
}
if (!strcmp("name", ep)) {
if (!value)
return error("%s: lacks value", var);
- fn->description = strdup(value);
+ fn->description = xstrdup(value);
return 0;
}
* %O - temporary file name for the merge base.
* %A - temporary file name for our version.
* %B - temporary file name for the other branches' version.
+ * %L - conflict marker length
*
* The external merge driver should write the results in the
* file named by %A, and signal that it has done with zero exit
* status.
*/
- fn->cmdline = strdup(value);
+ fn->cmdline = xstrdup(value);
return 0;
}
if (!strcmp("recursive", ep)) {
if (!value)
return error("%s: lacks value", var);
- fn->recursive = strdup(value);
+ fn->recursive = xstrdup(value);
return 0;
}
@@ -350,35 +324,73 @@ static const struct ll_merge_driver *find_ll_merge_driver(const char *merge_attr
return &ll_merge_drv[LL_TEXT_MERGE];
}
-static const char *git_path_check_merge(const char *path)
+static int git_path_check_merge(const char *path, struct git_attr_check check[2])
{
- static struct git_attr_check attr_merge_check;
-
- if (!attr_merge_check.attr)
- attr_merge_check.attr = git_attr("merge", 5);
+ if (!check[0].attr) {
+ check[0].attr = git_attr("merge");
+ check[1].attr = git_attr("conflict-marker-size");
+ }
+ return git_check_attr(path, 2, check);
+}
- if (git_checkattr(path, 1, &attr_merge_check))
- return NULL;
- return attr_merge_check.value;
+static void normalize_file(mmfile_t *mm, const char *path)
+{
+ struct strbuf strbuf = STRBUF_INIT;
+ if (renormalize_buffer(path, mm->ptr, mm->size, &strbuf)) {
+ free(mm->ptr);
+ mm->size = strbuf.len;
+ mm->ptr = strbuf_detach(&strbuf, NULL);
+ }
}
int ll_merge(mmbuffer_t *result_buf,
const char *path,
- mmfile_t *ancestor,
+ mmfile_t *ancestor, const char *ancestor_label,
mmfile_t *ours, const char *our_label,
mmfile_t *theirs, const char *their_label,
- int virtual_ancestor)
+ const struct ll_merge_options *opts)
{
- const char *ll_driver_name;
+ static struct git_attr_check check[2];
+ static const struct ll_merge_options default_opts;
+ const char *ll_driver_name = NULL;
+ int marker_size = DEFAULT_CONFLICT_MARKER_SIZE;
const struct ll_merge_driver *driver;
- ll_driver_name = git_path_check_merge(path);
- driver = find_ll_merge_driver(ll_driver_name);
+ if (!opts)
+ opts = &default_opts;
- if (virtual_ancestor && driver->recursive)
+ if (opts->renormalize) {
+ normalize_file(ancestor, path);
+ normalize_file(ours, path);
+ normalize_file(theirs, path);
+ }
+ if (!git_path_check_merge(path, check)) {
+ ll_driver_name = check[0].value;
+ if (check[1].value) {
+ marker_size = atoi(check[1].value);
+ if (marker_size <= 0)
+ marker_size = DEFAULT_CONFLICT_MARKER_SIZE;
+ }
+ }
+ driver = find_ll_merge_driver(ll_driver_name);
+ if (opts->virtual_ancestor && driver->recursive)
driver = find_ll_merge_driver(driver->recursive);
- return driver->fn(driver, result_buf, path,
- ancestor,
- ours, our_label,
- theirs, their_label, virtual_ancestor);
+ return driver->fn(driver, result_buf, path, ancestor, ancestor_label,
+ ours, our_label, theirs, their_label,
+ opts, marker_size);
+}
+
+int ll_merge_marker_size(const char *path)
+{
+ static struct git_attr_check check;
+ int marker_size = DEFAULT_CONFLICT_MARKER_SIZE;
+
+ if (!check.attr)
+ check.attr = git_attr("conflict-marker-size");
+ if (!git_check_attr(path, 1, &check) && check.value) {
+ marker_size = atoi(check.value);
+ if (marker_size <= 0)
+ marker_size = DEFAULT_CONFLICT_MARKER_SIZE;
+ }
+ return marker_size;
}