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-rw-r--r--diff.c161
1 files changed, 100 insertions, 61 deletions
diff --git a/diff.c b/diff.c
index 1054a4b732..00d47281a1 100644
--- a/diff.c
+++ b/diff.c
@@ -2,12 +2,14 @@
* Copyright (C) 2005 Junio C Hamano
*/
#include "cache.h"
+#include "alloc.h"
#include "config.h"
#include "tempfile.h"
#include "quote.h"
#include "diff.h"
#include "diffcore.h"
#include "delta.h"
+#include "hex.h"
#include "xdiff-interface.h"
#include "color.h"
#include "attr.h"
@@ -604,7 +606,7 @@ static unsigned long diff_filespec_size(struct repository *r,
return one->size;
}
-static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule)
+static int count_trailing_blank(mmfile_t *mf)
{
char *ptr = mf->ptr;
long size = mf->size;
@@ -622,7 +624,7 @@ static int count_trailing_blank(mmfile_t *mf, unsigned ws_rule)
for (prev_eol = ptr; mf->ptr <= prev_eol; prev_eol--)
if (*prev_eol == '\n')
break;
- if (!ws_blank_line(prev_eol + 1, ptr - prev_eol, ws_rule))
+ if (!ws_blank_line(prev_eol + 1, ptr - prev_eol))
break;
cnt++;
ptr = prev_eol - 1;
@@ -634,9 +636,8 @@ static void check_blank_at_eof(mmfile_t *mf1, mmfile_t *mf2,
struct emit_callback *ecbdata)
{
int l1, l2, at;
- unsigned ws_rule = ecbdata->ws_rule;
- l1 = count_trailing_blank(mf1, ws_rule);
- l2 = count_trailing_blank(mf2, ws_rule);
+ l1 = count_trailing_blank(mf1);
+ l2 = count_trailing_blank(mf2);
if (l2 <= l1) {
ecbdata->blank_at_eof_in_preimage = 0;
ecbdata->blank_at_eof_in_postimage = 0;
@@ -1583,7 +1584,7 @@ static int new_blank_line_at_eof(struct emit_callback *ecbdata, const char *line
ecbdata->blank_at_eof_in_preimage <= ecbdata->lno_in_preimage &&
ecbdata->blank_at_eof_in_postimage <= ecbdata->lno_in_postimage))
return 0;
- return ws_blank_line(line, len, ecbdata->ws_rule);
+ return ws_blank_line(line, len);
}
static void emit_add_line(struct emit_callback *ecbdata,
@@ -1955,7 +1956,7 @@ static int color_words_output_graph_prefix(struct diff_words_data *diff_words)
static void fn_out_diff_words_aux(void *priv,
long minus_first, long minus_len,
long plus_first, long plus_len,
- const char *func, long funclen)
+ const char *func UNUSED, long funclen UNUSED)
{
struct diff_words_data *diff_words = priv;
struct diff_words_style *style = diff_words->style;
@@ -2801,7 +2802,7 @@ static void show_stats(struct diffstat_t *data, struct diff_options *options)
else if (file->is_unmerged) {
strbuf_addf(&out, " %s%s%*s | %*s",
prefix, name, padding, "",
- number_width, "Unmerged");
+ number_width, "Unmerged\n");
emit_diff_symbol(options, DIFF_SYMBOL_STATS_LINE,
out.buf, out.len, 0);
strbuf_reset(&out);
@@ -3185,8 +3186,9 @@ static int is_conflict_marker(const char *line, int marker_size, unsigned long l
}
static void checkdiff_consume_hunk(void *priv,
- long ob, long on, long nb, long nn,
- const char *func, long funclen)
+ long ob UNUSED, long on UNUSED,
+ long nb, long nn UNUSED,
+ const char *func UNUSED, long funclen UNUSED)
{
struct checkdiff_t *data = priv;
@@ -3437,6 +3439,22 @@ static int diff_filepair_is_phoney(struct diff_filespec *one,
return !DIFF_FILE_VALID(one) && !DIFF_FILE_VALID(two);
}
+static int set_diff_algorithm(struct diff_options *opts,
+ const char *alg)
+{
+ long value = parse_algorithm_value(alg);
+
+ if (value < 0)
+ return -1;
+
+ /* clear out previous settings */
+ DIFF_XDL_CLR(opts, NEED_MINIMAL);
+ opts->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
+ opts->xdl_opts |= value;
+
+ return 0;
+}
+
static void builtin_diff(const char *name_a,
const char *name_b,
struct diff_filespec *one,
@@ -4213,7 +4231,6 @@ static void prep_temp_blob(struct index_state *istate,
}
static struct diff_tempfile *prepare_temp_file(struct repository *r,
- const char *name,
struct diff_filespec *one)
{
struct diff_tempfile *temp = claim_diff_tempfile();
@@ -4231,18 +4248,18 @@ static struct diff_tempfile *prepare_temp_file(struct repository *r,
if (!S_ISGITLINK(one->mode) &&
(!one->oid_valid ||
- reuse_worktree_file(r->index, name, &one->oid, 1))) {
+ reuse_worktree_file(r->index, one->path, &one->oid, 1))) {
struct stat st;
- if (lstat(name, &st) < 0) {
+ if (lstat(one->path, &st) < 0) {
if (errno == ENOENT)
goto not_a_valid_file;
- die_errno("stat(%s)", name);
+ die_errno("stat(%s)", one->path);
}
if (S_ISLNK(st.st_mode)) {
struct strbuf sb = STRBUF_INIT;
- if (strbuf_readlink(&sb, name, st.st_size) < 0)
- die_errno("readlink(%s)", name);
- prep_temp_blob(r->index, name, temp, sb.buf, sb.len,
+ if (strbuf_readlink(&sb, one->path, st.st_size) < 0)
+ die_errno("readlink(%s)", one->path);
+ prep_temp_blob(r->index, one->path, temp, sb.buf, sb.len,
(one->oid_valid ?
&one->oid : null_oid()),
(one->oid_valid ?
@@ -4251,7 +4268,7 @@ static struct diff_tempfile *prepare_temp_file(struct repository *r,
}
else {
/* we can borrow from the file in the work tree */
- temp->name = name;
+ temp->name = one->path;
if (!one->oid_valid)
oid_to_hex_r(temp->hex, null_oid());
else
@@ -4269,7 +4286,7 @@ static struct diff_tempfile *prepare_temp_file(struct repository *r,
else {
if (diff_populate_filespec(r, one, NULL))
die("cannot read data blob for %s", one->path);
- prep_temp_blob(r->index, name, temp,
+ prep_temp_blob(r->index, one->path, temp,
one->data, one->size,
&one->oid, one->mode);
}
@@ -4278,10 +4295,9 @@ static struct diff_tempfile *prepare_temp_file(struct repository *r,
static void add_external_diff_name(struct repository *r,
struct strvec *argv,
- const char *name,
struct diff_filespec *df)
{
- struct diff_tempfile *temp = prepare_temp_file(r, name, df);
+ struct diff_tempfile *temp = prepare_temp_file(r, df);
strvec_push(argv, temp->name);
strvec_push(argv, temp->hex);
strvec_push(argv, temp->mode);
@@ -4308,11 +4324,9 @@ static void run_external_diff(const char *pgm,
strvec_push(&cmd.args, name);
if (one && two) {
- add_external_diff_name(o->repo, &cmd.args, name, one);
- if (!other)
- add_external_diff_name(o->repo, &cmd.args, name, two);
- else {
- add_external_diff_name(o->repo, &cmd.args, other, two);
+ add_external_diff_name(o->repo, &cmd.args, one);
+ add_external_diff_name(o->repo, &cmd.args, two);
+ if (other) {
strvec_push(&cmd.args, other);
strvec_push(&cmd.args, xfrm_msg);
}
@@ -4444,15 +4458,13 @@ static void run_diff_cmd(const char *pgm,
const char *xfrm_msg = NULL;
int complete_rewrite = (p->status == DIFF_STATUS_MODIFIED) && p->score;
int must_show_header = 0;
+ struct userdiff_driver *drv = NULL;
-
- if (o->flags.allow_external) {
- struct userdiff_driver *drv;
-
+ if (o->flags.allow_external || !o->ignore_driver_algorithm)
drv = userdiff_find_by_path(o->repo->index, attr_path);
- if (drv && drv->external)
- pgm = drv->external;
- }
+
+ if (o->flags.allow_external && drv && drv->external)
+ pgm = drv->external;
if (msg) {
/*
@@ -4469,12 +4481,16 @@ static void run_diff_cmd(const char *pgm,
run_external_diff(pgm, name, other, one, two, xfrm_msg, o);
return;
}
- if (one && two)
+ if (one && two) {
+ if (!o->ignore_driver_algorithm && drv && drv->algorithm)
+ set_diff_algorithm(o, drv->algorithm);
+
builtin_diff(name, other ? other : name,
one, two, xfrm_msg, must_show_header,
o, complete_rewrite);
- else
+ } else {
fprintf(o->file, "* Unmerged path %s\n", name);
+ }
}
static void diff_fill_oid_info(struct diff_filespec *one, struct index_state *istate)
@@ -4571,6 +4587,14 @@ static void run_diffstat(struct diff_filepair *p, struct diff_options *o,
const char *name;
const char *other;
+ if (!o->ignore_driver_algorithm) {
+ struct userdiff_driver *drv = userdiff_find_by_path(o->repo->index,
+ p->one->path);
+
+ if (drv && drv->algorithm)
+ set_diff_algorithm(o, drv->algorithm);
+ }
+
if (DIFF_PAIR_UNMERGED(p)) {
/* unmerged */
builtin_diffstat(p->one->path, NULL, NULL, NULL,
@@ -4615,8 +4639,6 @@ static void run_checkdiff(struct diff_filepair *p, struct diff_options *o)
builtin_checkdiff(name, other, attr_path, p->one, p->two, o);
}
-static void prep_parse_options(struct diff_options *options);
-
void repo_diff_setup(struct repository *r, struct diff_options *options)
{
memcpy(options, &default_diff_options, sizeof(*options));
@@ -4662,8 +4684,6 @@ void repo_diff_setup(struct repository *r, struct diff_options *options)
options->color_moved = diff_color_moved_default;
options->color_moved_ws_handling = diff_color_moved_ws_default;
-
- prep_parse_options(options);
}
static const char diff_status_letters[] = {
@@ -4821,8 +4841,6 @@ void diff_setup_done(struct diff_options *options)
options->filter = ~filter_bit[DIFF_STATUS_FILTER_AON];
options->filter &= ~options->filter_not;
}
-
- FREE_AND_NULL(options->parseopts);
}
int parse_long_opt(const char *opt, const char **argv,
@@ -5117,17 +5135,32 @@ static int diff_opt_diff_algorithm(const struct option *opt,
const char *arg, int unset)
{
struct diff_options *options = opt->value;
- long value = parse_algorithm_value(arg);
BUG_ON_OPT_NEG(unset);
- if (value < 0)
+
+ if (set_diff_algorithm(options, arg))
return error(_("option diff-algorithm accepts \"myers\", "
"\"minimal\", \"patience\" and \"histogram\""));
- /* clear out previous settings */
- DIFF_XDL_CLR(options, NEED_MINIMAL);
- options->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
- options->xdl_opts |= value;
+ options->ignore_driver_algorithm = 1;
+
+ return 0;
+}
+
+static int diff_opt_diff_algorithm_no_arg(const struct option *opt,
+ const char *arg, int unset)
+{
+ struct diff_options *options = opt->value;
+
+ BUG_ON_OPT_NEG(unset);
+ BUG_ON_OPT_ARG(arg);
+
+ if (set_diff_algorithm(options, opt->long_name))
+ BUG("available diff algorithms include \"myers\", "
+ "\"minimal\", \"patience\" and \"histogram\"");
+
+ options->ignore_driver_algorithm = 1;
+
return 0;
}
@@ -5260,7 +5293,6 @@ static int diff_opt_patience(const struct option *opt,
BUG_ON_OPT_NEG(unset);
BUG_ON_OPT_ARG(arg);
- options->xdl_opts = DIFF_WITH_ALG(options, PATIENCE_DIFF);
/*
* Both --patience and --anchored use PATIENCE_DIFF
* internally, so remove any anchors previously
@@ -5269,7 +5301,9 @@ static int diff_opt_patience(const struct option *opt,
for (i = 0; i < options->anchors_nr; i++)
free(options->anchors[i]);
options->anchors_nr = 0;
- return 0;
+ options->ignore_driver_algorithm = 1;
+
+ return set_diff_algorithm(options, "patience");
}
static int diff_opt_ignore_regex(const struct option *opt,
@@ -5419,7 +5453,8 @@ static int diff_opt_rotate_to(const struct option *opt, const char *arg, int uns
return 0;
}
-static void prep_parse_options(struct diff_options *options)
+struct option *add_diff_options(const struct option *opts,
+ struct diff_options *options)
{
struct option parseopts[] = {
OPT_GROUP(N_("Diff output format options")),
@@ -5571,9 +5606,10 @@ static void prep_parse_options(struct diff_options *options)
N_("prevent rename/copy detection if the number of rename/copy targets exceeds given limit")),
OPT_GROUP(N_("Diff algorithm options")),
- OPT_BIT(0, "minimal", &options->xdl_opts,
- N_("produce the smallest possible diff"),
- XDF_NEED_MINIMAL),
+ OPT_CALLBACK_F(0, "minimal", options, NULL,
+ N_("produce the smallest possible diff"),
+ PARSE_OPT_NONEG | PARSE_OPT_NOARG,
+ diff_opt_diff_algorithm_no_arg),
OPT_BIT_F('w', "ignore-all-space", &options->xdl_opts,
N_("ignore whitespace when comparing lines"),
XDF_IGNORE_WHITESPACE, PARSE_OPT_NONEG),
@@ -5599,9 +5635,10 @@ static void prep_parse_options(struct diff_options *options)
N_("generate diff using the \"patience diff\" algorithm"),
PARSE_OPT_NONEG | PARSE_OPT_NOARG,
diff_opt_patience),
- OPT_BITOP(0, "histogram", &options->xdl_opts,
- N_("generate diff using the \"histogram diff\" algorithm"),
- XDF_HISTOGRAM_DIFF, XDF_DIFF_ALGORITHM_MASK),
+ OPT_CALLBACK_F(0, "histogram", options, NULL,
+ N_("generate diff using the \"histogram diff\" algorithm"),
+ PARSE_OPT_NONEG | PARSE_OPT_NOARG,
+ diff_opt_diff_algorithm_no_arg),
OPT_CALLBACK_F(0, "diff-algorithm", options, N_("<algorithm>"),
N_("choose a diff algorithm"),
PARSE_OPT_NONEG, diff_opt_diff_algorithm),
@@ -5689,22 +5726,25 @@ static void prep_parse_options(struct diff_options *options)
OPT_END()
};
- ALLOC_ARRAY(options->parseopts, ARRAY_SIZE(parseopts));
- memcpy(options->parseopts, parseopts, sizeof(parseopts));
+ return parse_options_concat(opts, parseopts);
}
int diff_opt_parse(struct diff_options *options,
const char **av, int ac, const char *prefix)
{
+ struct option no_options[] = { OPT_END() };
+ struct option *parseopts = add_diff_options(no_options, options);
+
if (!prefix)
prefix = "";
- ac = parse_options(ac, av, prefix, options->parseopts, NULL,
+ ac = parse_options(ac, av, prefix, parseopts, NULL,
PARSE_OPT_KEEP_DASHDASH |
PARSE_OPT_KEEP_UNKNOWN_OPT |
PARSE_OPT_NO_INTERNAL_HELP |
PARSE_OPT_ONE_SHOT |
PARSE_OPT_STOP_AT_NON_OPTION);
+ free(parseopts);
return ac;
}
@@ -6513,7 +6553,6 @@ void diff_free(struct diff_options *options)
diff_free_file(options);
diff_free_ignore_regex(options);
clear_pathspec(&options->pathspec);
- FREE_AND_NULL(options->parseopts);
}
void diff_flush(struct diff_options *options)
@@ -7037,7 +7076,7 @@ static char *run_textconv(struct repository *r,
struct strbuf buf = STRBUF_INIT;
int err = 0;
- temp = prepare_temp_file(r, spec->path, spec);
+ temp = prepare_temp_file(r, spec);
strvec_push(&child.args, pgm);
strvec_push(&child.args, temp->name);
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-12 21:11:50 +0000