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-rw-r--r--diff.c275
1 files changed, 244 insertions, 31 deletions
diff --git a/diff.c b/diff.c
index 639eb646b9..f830afac79 100644
--- a/diff.c
+++ b/diff.c
@@ -13,6 +13,7 @@
#include "attr.h"
#include "run-command.h"
#include "utf8.h"
+#include "object-store.h"
#include "userdiff.h"
#include "submodule-config.h"
#include "submodule.h"
@@ -36,6 +37,7 @@ static int diff_rename_limit_default = 400;
static int diff_suppress_blank_empty;
static int diff_use_color_default = -1;
static int diff_color_moved_default;
+static int diff_color_moved_ws_default;
static int diff_context_default = 3;
static int diff_interhunk_context_default;
static const char *diff_word_regex_cfg;
@@ -263,14 +265,54 @@ static int parse_color_moved(const char *arg)
return COLOR_MOVED_NO;
else if (!strcmp(arg, "plain"))
return COLOR_MOVED_PLAIN;
+ else if (!strcmp(arg, "blocks"))
+ return COLOR_MOVED_BLOCKS;
else if (!strcmp(arg, "zebra"))
return COLOR_MOVED_ZEBRA;
else if (!strcmp(arg, "default"))
return COLOR_MOVED_DEFAULT;
+ else if (!strcmp(arg, "dimmed-zebra"))
+ return COLOR_MOVED_ZEBRA_DIM;
else if (!strcmp(arg, "dimmed_zebra"))
return COLOR_MOVED_ZEBRA_DIM;
else
- return error(_("color moved setting must be one of 'no', 'default', 'zebra', 'dimmed_zebra', 'plain'"));
+ return error(_("color moved setting must be one of 'no', 'default', 'blocks', 'zebra', 'dimmed-zebra', 'plain'"));
+}
+
+static int parse_color_moved_ws(const char *arg)
+{
+ int ret = 0;
+ struct string_list l = STRING_LIST_INIT_DUP;
+ struct string_list_item *i;
+
+ string_list_split(&l, arg, ',', -1);
+
+ for_each_string_list_item(i, &l) {
+ struct strbuf sb = STRBUF_INIT;
+ strbuf_addstr(&sb, i->string);
+ strbuf_trim(&sb);
+
+ if (!strcmp(sb.buf, "ignore-space-change"))
+ ret |= XDF_IGNORE_WHITESPACE_CHANGE;
+ else if (!strcmp(sb.buf, "ignore-space-at-eol"))
+ ret |= XDF_IGNORE_WHITESPACE_AT_EOL;
+ else if (!strcmp(sb.buf, "ignore-all-space"))
+ ret |= XDF_IGNORE_WHITESPACE;
+ else if (!strcmp(sb.buf, "allow-indentation-change"))
+ ret |= COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE;
+ else
+ error(_("ignoring unknown color-moved-ws mode '%s'"), sb.buf);
+
+ strbuf_release(&sb);
+ }
+
+ if ((ret & COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE) &&
+ (ret & XDF_WHITESPACE_FLAGS))
+ die(_("color-moved-ws: allow-indentation-change cannot be combined with other white space modes"));
+
+ string_list_clear(&l, 0);
+
+ return ret;
}
int git_diff_ui_config(const char *var, const char *value, void *cb)
@@ -286,6 +328,13 @@ int git_diff_ui_config(const char *var, const char *value, void *cb)
diff_color_moved_default = cm;
return 0;
}
+ if (!strcmp(var, "diff.colormovedws")) {
+ int cm = parse_color_moved_ws(value);
+ if (cm < 0)
+ return -1;
+ diff_color_moved_ws_default = cm;
+ return 0;
+ }
if (!strcmp(var, "diff.context")) {
diff_context_default = git_config_int(var, value);
if (diff_context_default < 0)
@@ -697,16 +746,116 @@ struct moved_entry {
struct hashmap_entry ent;
const struct emitted_diff_symbol *es;
struct moved_entry *next_line;
+ struct ws_delta *wsd;
};
-static int moved_entry_cmp(const struct diff_options *diffopt,
- const struct moved_entry *a,
- const struct moved_entry *b,
+/**
+ * The struct ws_delta holds white space differences between moved lines, i.e.
+ * between '+' and '-' lines that have been detected to be a move.
+ * The string contains the difference in leading white spaces, before the
+ * rest of the line is compared using the white space config for move
+ * coloring. The current_longer indicates if the first string in the
+ * comparision is longer than the second.
+ */
+struct ws_delta {
+ char *string;
+ unsigned int current_longer : 1;
+};
+#define WS_DELTA_INIT { NULL, 0 }
+
+static int compute_ws_delta(const struct emitted_diff_symbol *a,
+ const struct emitted_diff_symbol *b,
+ struct ws_delta *out)
+{
+ const struct emitted_diff_symbol *longer = a->len > b->len ? a : b;
+ const struct emitted_diff_symbol *shorter = a->len > b->len ? b : a;
+ int d = longer->len - shorter->len;
+
+ out->string = xmemdupz(longer->line, d);
+ out->current_longer = (a == longer);
+
+ return !strncmp(longer->line + d, shorter->line, shorter->len);
+}
+
+static int cmp_in_block_with_wsd(const struct diff_options *o,
+ const struct moved_entry *cur,
+ const struct moved_entry *match,
+ struct moved_entry *pmb,
+ int n)
+{
+ struct emitted_diff_symbol *l = &o->emitted_symbols->buf[n];
+ int al = cur->es->len, cl = l->len;
+ const char *a = cur->es->line,
+ *b = match->es->line,
+ *c = l->line;
+
+ int wslen;
+
+ /*
+ * We need to check if 'cur' is equal to 'match'.
+ * As those are from the same (+/-) side, we do not need to adjust for
+ * indent changes. However these were found using fuzzy matching
+ * so we do have to check if they are equal.
+ */
+ if (strcmp(a, b))
+ return 1;
+
+ if (!pmb->wsd)
+ /*
+ * No white space delta was carried forward? This can happen
+ * when we exit early in this function and do not carry
+ * forward ws.
+ */
+ return 1;
+
+ /*
+ * The indent changes of the block are known and carried forward in
+ * pmb->wsd; however we need to check if the indent changes of the
+ * current line are still the same as before.
+ *
+ * To do so we need to compare 'l' to 'cur', adjusting the
+ * one of them for the white spaces, depending which was longer.
+ */
+
+ wslen = strlen(pmb->wsd->string);
+ if (pmb->wsd->current_longer) {
+ c += wslen;
+ cl -= wslen;
+ } else {
+ a += wslen;
+ al -= wslen;
+ }
+
+ if (strcmp(a, c))
+ return 1;
+
+ return 0;
+}
+
+static int moved_entry_cmp(const void *hashmap_cmp_fn_data,
+ const void *entry,
+ const void *entry_or_key,
const void *keydata)
{
+ const struct diff_options *diffopt = hashmap_cmp_fn_data;
+ const struct moved_entry *a = entry;
+ const struct moved_entry *b = entry_or_key;
+ unsigned flags = diffopt->color_moved_ws_handling
+ & XDF_WHITESPACE_FLAGS;
+
+ if (diffopt->color_moved_ws_handling &
+ COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE)
+ /*
+ * As there is not specific white space config given,
+ * we'd need to check for a new block, so ignore all
+ * white space. The setup of the white space
+ * configuration for the next block is done else where
+ */
+ flags |= XDF_IGNORE_WHITESPACE;
+
return !xdiff_compare_lines(a->es->line, a->es->len,
b->es->line, b->es->len,
- diffopt->xdl_opts);
+ flags);
}
static struct moved_entry *prepare_entry(struct diff_options *o,
@@ -714,10 +863,12 @@ static struct moved_entry *prepare_entry(struct diff_options *o,
{
struct moved_entry *ret = xmalloc(sizeof(*ret));
struct emitted_diff_symbol *l = &o->emitted_symbols->buf[line_no];
+ unsigned flags = o->color_moved_ws_handling & XDF_WHITESPACE_FLAGS;
- ret->ent.hash = xdiff_hash_string(l->line, l->len, o->xdl_opts);
+ ret->ent.hash = xdiff_hash_string(l->line, l->len, flags);
ret->es = l;
ret->next_line = NULL;
+ ret->wsd = NULL;
return ret;
}
@@ -754,6 +905,56 @@ static void add_lines_to_move_detection(struct diff_options *o,
}
}
+static void pmb_advance_or_null(struct diff_options *o,
+ struct moved_entry *match,
+ struct hashmap *hm,
+ struct moved_entry **pmb,
+ int pmb_nr)
+{
+ int i;
+ for (i = 0; i < pmb_nr; i++) {
+ struct moved_entry *prev = pmb[i];
+ struct moved_entry *cur = (prev && prev->next_line) ?
+ prev->next_line : NULL;
+ if (cur && !hm->cmpfn(o, cur, match, NULL)) {
+ pmb[i] = cur;
+ } else {
+ pmb[i] = NULL;
+ }
+ }
+}
+
+static void pmb_advance_or_null_multi_match(struct diff_options *o,
+ struct moved_entry *match,
+ struct hashmap *hm,
+ struct moved_entry **pmb,
+ int pmb_nr, int n)
+{
+ int i;
+ char *got_match = xcalloc(1, pmb_nr);
+
+ for (; match; match = hashmap_get_next(hm, match)) {
+ for (i = 0; i < pmb_nr; i++) {
+ struct moved_entry *prev = pmb[i];
+ struct moved_entry *cur = (prev && prev->next_line) ?
+ prev->next_line : NULL;
+ if (!cur)
+ continue;
+ if (!cmp_in_block_with_wsd(o, cur, match, pmb[i], n))
+ got_match[i] |= 1;
+ }
+ }
+
+ for (i = 0; i < pmb_nr; i++) {
+ if (got_match[i]) {
+ /* Carry the white space delta forward */
+ pmb[i]->next_line->wsd = pmb[i]->wsd;
+ pmb[i] = pmb[i]->next_line;
+ } else
+ pmb[i] = NULL;
+ }
+}
+
static int shrink_potential_moved_blocks(struct moved_entry **pmb,
int pmb_nr)
{
@@ -771,6 +972,10 @@ static int shrink_potential_moved_blocks(struct moved_entry **pmb,
if (lp < pmb_nr && rp > -1 && lp < rp) {
pmb[lp] = pmb[rp];
+ if (pmb[rp]->wsd) {
+ free(pmb[rp]->wsd->string);
+ FREE_AND_NULL(pmb[rp]->wsd);
+ }
pmb[rp] = NULL;
rp--;
lp++;
@@ -828,19 +1033,18 @@ static void mark_color_as_moved(struct diff_options *o,
struct moved_entry *key;
struct moved_entry *match = NULL;
struct emitted_diff_symbol *l = &o->emitted_symbols->buf[n];
- int i;
switch (l->s) {
case DIFF_SYMBOL_PLUS:
hm = del_lines;
key = prepare_entry(o, n);
- match = hashmap_get(hm, key, o);
+ match = hashmap_get(hm, key, NULL);
free(key);
break;
case DIFF_SYMBOL_MINUS:
hm = add_lines;
key = prepare_entry(o, n);
- match = hashmap_get(hm, key, o);
+ match = hashmap_get(hm, key, NULL);
free(key);
break;
default:
@@ -859,17 +1063,11 @@ static void mark_color_as_moved(struct diff_options *o,
if (o->color_moved == COLOR_MOVED_PLAIN)
continue;
- /* Check any potential block runs, advance each or nullify */
- for (i = 0; i < pmb_nr; i++) {
- struct moved_entry *p = pmb[i];
- struct moved_entry *pnext = (p && p->next_line) ?
- p->next_line : NULL;
- if (pnext && !hm->cmpfn(o, pnext, match, NULL)) {
- pmb[i] = p->next_line;
- } else {
- pmb[i] = NULL;
- }
- }
+ if (o->color_moved_ws_handling &
+ COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE)
+ pmb_advance_or_null_multi_match(o, match, hm, pmb, pmb_nr, n);
+ else
+ pmb_advance_or_null(o, match, hm, pmb, pmb_nr);
pmb_nr = shrink_potential_moved_blocks(pmb, pmb_nr);
@@ -880,7 +1078,17 @@ static void mark_color_as_moved(struct diff_options *o,
*/
for (; match; match = hashmap_get_next(hm, match)) {
ALLOC_GROW(pmb, pmb_nr + 1, pmb_alloc);
- pmb[pmb_nr++] = match;
+ if (o->color_moved_ws_handling &
+ COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE) {
+ struct ws_delta *wsd = xmalloc(sizeof(*match->wsd));
+ if (compute_ws_delta(l, match->es, wsd)) {
+ match->wsd = wsd;
+ pmb[pmb_nr++] = match;
+ } else
+ free(wsd);
+ } else {
+ pmb[pmb_nr++] = match;
+ }
}
flipped_block = (flipped_block + 1) % 2;
@@ -891,7 +1099,7 @@ static void mark_color_as_moved(struct diff_options *o,
block_length++;
- if (flipped_block)
+ if (flipped_block && o->color_moved != COLOR_MOVED_BLOCKS)
l->flags |= DIFF_SYMBOL_MOVED_LINE_ALT;
}
adjust_last_block(o, n, block_length);
@@ -1863,8 +2071,8 @@ static void init_diff_words_data(struct emit_callback *ecbdata,
if (regcomp(ecbdata->diff_words->word_regex,
o->word_regex,
REG_EXTENDED | REG_NEWLINE))
- die ("Invalid regular expression: %s",
- o->word_regex);
+ die("invalid regular expression: %s",
+ o->word_regex);
}
for (i = 0; i < ARRAY_SIZE(diff_words_styles); i++) {
if (o->word_diff == diff_words_styles[i].type) {
@@ -3832,7 +4040,7 @@ static const char *diff_abbrev_oid(const struct object_id *oid, int abbrev)
char *hex = oid_to_hex(oid);
if (abbrev < 0)
abbrev = FALLBACK_DEFAULT_ABBREV;
- if (abbrev > GIT_SHA1_HEXSZ)
+ if (abbrev > the_hash_algo->hexsz)
BUG("oid abbreviation out of range: %d", abbrev);
if (abbrev)
hex[abbrev] = '\0';
@@ -4124,6 +4332,7 @@ void diff_setup(struct diff_options *options)
}
options->color_moved = diff_color_moved_default;
+ options->color_moved_ws_handling = diff_color_moved_ws_default;
}
void diff_setup_done(struct diff_options *options)
@@ -4703,6 +4912,8 @@ int diff_opt_parse(struct diff_options *options,
if (cm < 0)
die("bad --color-moved argument: %s", arg);
options->color_moved = cm;
+ } else if (skip_prefix(arg, "--color-moved-ws=", &arg)) {
+ options->color_moved_ws_handling = parse_color_moved_ws(arg);
} else if (skip_to_optional_arg_default(arg, "--color-words", &options->word_regex, NULL)) {
options->use_color = 1;
options->word_diff = DIFF_WORDS_COLOR;
@@ -4947,7 +5158,7 @@ const char *diff_aligned_abbrev(const struct object_id *oid, int len)
const char *abbrev;
/* Do we want all 40 hex characters? */
- if (len == GIT_SHA1_HEXSZ)
+ if (len == the_hash_algo->hexsz)
return oid_to_hex(oid);
/* An abbreviated value is fine, possibly followed by an ellipsis. */
@@ -4977,7 +5188,7 @@ const char *diff_aligned_abbrev(const struct object_id *oid, int len)
* the automatic sizing is supposed to give abblen that ensures
* uniqueness across all objects (statistically speaking).
*/
- if (abblen < GIT_SHA1_HEXSZ - 3) {
+ if (abblen < the_hash_algo->hexsz - 3) {
static char hex[GIT_MAX_HEXSZ + 1];
if (len < abblen && abblen <= len + 2)
xsnprintf(hex, sizeof(hex), "%s%.*s", abbrev, len+3-abblen, "..");
@@ -5533,10 +5744,12 @@ static void diff_flush_patch_all_file_pairs(struct diff_options *o)
if (o->color_moved) {
struct hashmap add_lines, del_lines;
- hashmap_init(&del_lines,
- (hashmap_cmp_fn)moved_entry_cmp, o, 0);
- hashmap_init(&add_lines,
- (hashmap_cmp_fn)moved_entry_cmp, o, 0);
+ if (o->color_moved_ws_handling &
+ COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE)
+ o->color_moved_ws_handling |= XDF_IGNORE_WHITESPACE;
+
+ hashmap_init(&del_lines, moved_entry_cmp, o, 0);
+ hashmap_init(&add_lines, moved_entry_cmp, o, 0);
add_lines_to_move_detection(o, &add_lines, &del_lines);
mark_color_as_moved(o, &add_lines, &del_lines);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-22 19:16:39 +0000