options->submodule_format = DIFF_SUBMODULE_SHORT;
else if (!strcmp(value, "diff"))
options->submodule_format = DIFF_SUBMODULE_INLINE_DIFF;
+ /*
+ * Please update $__git_diff_submodule_formats in
+ * git-completion.bash when you add new formats.
+ */
else
return -1;
return 0;
return XDF_PATIENCE_DIFF;
else if (!strcasecmp(value, "histogram"))
return XDF_HISTOGRAM_DIFF;
+ /*
+ * Please update $__git_diff_algorithms in git-completion.bash
+ * when you add new algorithms.
+ */
return -1;
}
strbuf_addstr(&sb, i->string);
strbuf_trim(&sb);
- if (!strcmp(sb.buf, "ignore-space-change"))
+ if (!strcmp(sb.buf, "no"))
+ ret = 0;
+ else 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;
if ((ret & COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE) &&
(ret & XDF_WHITESPACE_FLAGS)) {
- error(_("color-moved-ws: allow-indentation-change cannot be combined with other white space modes"));
+ error(_("color-moved-ws: allow-indentation-change cannot be combined with other whitespace modes"));
ret |= COLOR_MOVED_WS_ERROR;
}
if (done_preparing)
return external_diff_cmd;
- external_diff_cmd = getenv("GIT_EXTERNAL_DIFF");
+ external_diff_cmd = xstrdup_or_null(getenv("GIT_EXTERNAL_DIFF"));
if (!external_diff_cmd)
external_diff_cmd = external_diff_cmd_cfg;
done_preparing = 1;
const char *line;
int len;
int flags;
+ int indent_off; /* Offset to first non-whitespace character */
+ int indent_width; /* The visual width of the indentation */
enum diff_symbol s;
};
#define EMITTED_DIFF_SYMBOL_INIT {NULL}
struct moved_entry *next_line;
};
-/**
- * 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 }
-
struct moved_block {
struct moved_entry *match;
- struct ws_delta wsd;
+ int wsd; /* The whitespace delta of this block */
};
static void moved_block_clear(struct moved_block *b)
{
- FREE_AND_NULL(b->wsd.string);
- b->match = NULL;
+ memset(b, 0, sizeof(*b));
}
-static int compute_ws_delta(const struct emitted_diff_symbol *a,
- const struct emitted_diff_symbol *b,
- struct ws_delta *out)
+#define INDENT_BLANKLINE INT_MIN
+
+static void fill_es_indent_data(struct emitted_diff_symbol *es)
{
- 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;
+ unsigned int off = 0, i;
+ int width = 0, tab_width = es->flags & WS_TAB_WIDTH_MASK;
+ const char *s = es->line;
+ const int len = es->len;
+
+ /* skip any \v \f \r at start of indentation */
+ while (s[off] == '\f' || s[off] == '\v' ||
+ (s[off] == '\r' && off < len - 1))
+ off++;
+
+ /* calculate the visual width of indentation */
+ while(1) {
+ if (s[off] == ' ') {
+ width++;
+ off++;
+ } else if (s[off] == '\t') {
+ width += tab_width - (width % tab_width);
+ while (s[++off] == '\t')
+ width += tab_width;
+ } else {
+ break;
+ }
+ }
- if (strncmp(longer->line + d, shorter->line, shorter->len))
+ /* check if this line is blank */
+ for (i = off; i < len; i++)
+ if (!isspace(s[i]))
+ break;
+
+ if (i == len) {
+ es->indent_width = INDENT_BLANKLINE;
+ es->indent_off = len;
+ } else {
+ es->indent_off = off;
+ es->indent_width = width;
+ }
+}
+
+static int compute_ws_delta(const struct emitted_diff_symbol *a,
+ const struct emitted_diff_symbol *b,
+ int *out)
+{
+ int a_len = a->len,
+ b_len = b->len,
+ a_off = a->indent_off,
+ a_width = a->indent_width,
+ b_off = b->indent_off,
+ b_width = b->indent_width;
+ int delta;
+
+ if (a_width == INDENT_BLANKLINE && b_width == INDENT_BLANKLINE) {
+ *out = INDENT_BLANKLINE;
+ return 1;
+ }
+
+ if (a->s == DIFF_SYMBOL_PLUS)
+ delta = a_width - b_width;
+ else
+ delta = b_width - a_width;
+
+ if (a_len - a_off != b_len - b_off ||
+ memcmp(a->line + a_off, b->line + b_off, a_len - a_off))
return 0;
- out->string = xmemdupz(longer->line, d);
- out->current_longer = (a == longer);
+ *out = delta;
return 1;
}
int n)
{
struct emitted_diff_symbol *l = &o->emitted_symbols->buf[n];
- int al = cur->es->len, cl = l->len;
+ int al = cur->es->len, bl = match->es->len, cl = l->len;
const char *a = cur->es->line,
*b = match->es->line,
*c = l->line;
-
- int wslen;
+ int a_off = cur->es->indent_off,
+ a_width = cur->es->indent_width,
+ c_off = l->indent_off,
+ c_width = l->indent_width;
+ int delta;
/*
- * 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.
+ * 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. Here we
+ * just check the lengths. We delay calling memcmp() to check
+ * the contents until later as if the length comparison for a
+ * and c fails we can avoid the call all together.
*/
- if (strcmp(a, b))
+ if (al != bl)
return 1;
- if (!pmb->wsd.string)
- /*
- * The white space delta is not active? This can happen
- * when we exit early in this function.
- */
- return 1;
+ /* If 'l' and 'cur' are both blank then they match. */
+ if (a_width == INDENT_BLANKLINE && c_width == INDENT_BLANKLINE)
+ return 0;
/*
- * The indent changes of the block are known and stored 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.
+ * The indent changes of the block are known and stored in pmb->wsd;
+ * however we need to check if the indent changes of the current line
+ * match those of the current block and that the text of 'l' and 'cur'
+ * after the indentation match.
*/
+ if (cur->es->s == DIFF_SYMBOL_PLUS)
+ delta = a_width - c_width;
+ else
+ delta = c_width - a_width;
- wslen = strlen(pmb->wsd.string);
- if (pmb->wsd.current_longer) {
- c += wslen;
- cl -= wslen;
- } else {
- a += wslen;
- al -= wslen;
- }
-
- if (al != cl || memcmp(a, c, al))
- return 1;
+ /*
+ * If the previous lines of this block were all blank then set its
+ * whitespace delta.
+ */
+ if (pmb->wsd == INDENT_BLANKLINE)
+ pmb->wsd = delta;
- return 0;
+ return !(delta == pmb->wsd && al - a_off == cl - c_off &&
+ !memcmp(a, b, al) && !
+ memcmp(a + a_off, c + c_off, al - a_off));
}
static int moved_entry_cmp(const void *hashmap_cmp_fn_data,
continue;
}
+ if (o->color_moved_ws_handling &
+ COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE)
+ fill_es_indent_data(&o->emitted_symbols->buf[n]);
key = prepare_entry(o, n);
if (prev_line && prev_line->es->s == o->emitted_symbols->buf[n].s)
prev_line->next_line = key;
if (lp < pmb_nr && rp > -1 && lp < rp) {
pmb[lp] = pmb[rp];
- pmb[rp].match = NULL;
- pmb[rp].wsd.string = NULL;
+ memset(&pmb[rp], 0, sizeof(pmb[rp]));
rp--;
lp++;
}
* The last block consists of the (n - block_length)'th line up to but not
* including the nth line.
*
+ * Returns 0 if the last block is empty or is unset by this function, non zero
+ * otherwise.
+ *
* NEEDSWORK: This uses the same heuristic as blame_entry_score() in blame.c.
* Think of a way to unify them.
*/
-static void adjust_last_block(struct diff_options *o, int n, int block_length)
+static int adjust_last_block(struct diff_options *o, int n, int block_length)
{
int i, alnum_count = 0;
if (o->color_moved == COLOR_MOVED_PLAIN)
- return;
+ return block_length;
for (i = 1; i < block_length + 1; i++) {
const char *c = o->emitted_symbols->buf[n - i].line;
for (; *c; c++) {
continue;
alnum_count++;
if (alnum_count >= COLOR_MOVED_MIN_ALNUM_COUNT)
- return;
+ return 1;
}
}
for (i = 1; i < block_length + 1; i++)
o->emitted_symbols->buf[n - i].flags &= ~DIFF_SYMBOL_MOVED_LINE;
+ return 0;
}
/* Find blocks of moved code, delegate actual coloring decision to helper */
{
struct moved_block *pmb = NULL; /* potentially moved blocks */
int pmb_nr = 0, pmb_alloc = 0;
- int n, flipped_block = 1, block_length = 0;
+ int n, flipped_block = 0, block_length = 0;
for (n = 0; n < o->emitted_symbols->nr; n++) {
struct moved_entry *key;
struct moved_entry *match = NULL;
struct emitted_diff_symbol *l = &o->emitted_symbols->buf[n];
+ enum diff_symbol last_symbol = 0;
switch (l->s) {
case DIFF_SYMBOL_PLUS:
free(key);
break;
default:
- flipped_block = 1;
+ flipped_block = 0;
}
if (!match) {
moved_block_clear(&pmb[i]);
pmb_nr = 0;
block_length = 0;
+ flipped_block = 0;
+ last_symbol = l->s;
continue;
}
- l->flags |= DIFF_SYMBOL_MOVED_LINE;
-
- if (o->color_moved == COLOR_MOVED_PLAIN)
+ if (o->color_moved == COLOR_MOVED_PLAIN) {
+ last_symbol = l->s;
+ l->flags |= DIFF_SYMBOL_MOVED_LINE;
continue;
+ }
if (o->color_moved_ws_handling &
COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE)
&pmb[pmb_nr].wsd))
pmb[pmb_nr++].match = match;
} else {
- pmb[pmb_nr].wsd.string = NULL;
+ pmb[pmb_nr].wsd = 0;
pmb[pmb_nr++].match = match;
}
}
- flipped_block = (flipped_block + 1) % 2;
+ if (adjust_last_block(o, n, block_length) &&
+ pmb_nr && last_symbol != l->s)
+ flipped_block = (flipped_block + 1) % 2;
+ else
+ flipped_block = 0;
- adjust_last_block(o, n, block_length);
block_length = 0;
}
- block_length++;
-
- if (flipped_block && o->color_moved != COLOR_MOVED_BLOCKS)
- l->flags |= DIFF_SYMBOL_MOVED_LINE_ALT;
+ if (pmb_nr) {
+ block_length++;
+ l->flags |= DIFF_SYMBOL_MOVED_LINE;
+ if (flipped_block && o->color_moved != COLOR_MOVED_BLOCKS)
+ l->flags |= DIFF_SYMBOL_MOVED_LINE_ALT;
+ }
+ last_symbol = l->s;
}
adjust_last_block(o, n, block_length);
static void emit_diff_symbol(struct diff_options *o, enum diff_symbol s,
const char *line, int len, unsigned flags)
{
- struct emitted_diff_symbol e = {line, len, flags, s};
+ struct emitted_diff_symbol e = {line, len, flags, 0, 0, s};
if (o->emitted_symbols)
append_emitted_diff_symbol(o, &e);
return ws_blank_line(line, len, ecbdata->ws_rule);
}
-static void emit_add_line(const char *reset,
- struct emit_callback *ecbdata,
+static void emit_add_line(struct emit_callback *ecbdata,
const char *line, int len)
{
unsigned flags = WSEH_NEW | ecbdata->ws_rule;
emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_PLUS, line, len, flags);
}
-static void emit_del_line(const char *reset,
- struct emit_callback *ecbdata,
+static void emit_del_line(struct emit_callback *ecbdata,
const char *line, int len)
{
unsigned flags = WSEH_OLD | ecbdata->ws_rule;
emit_diff_symbol(ecbdata->opt, DIFF_SYMBOL_MINUS, line, len, flags);
}
-static void emit_context_line(const char *reset,
- struct emit_callback *ecbdata,
+static void emit_context_line(struct emit_callback *ecbdata,
const char *line, int len)
{
unsigned flags = WSEH_CONTEXT | ecbdata->ws_rule;
int prefix, const char *data, int size)
{
const char *endp = NULL;
- const char *reset = diff_get_color(ecb->color_diff, DIFF_RESET);
while (0 < size) {
int len;
len = endp ? (endp - data + 1) : size;
if (prefix != '+') {
ecb->lno_in_preimage++;
- emit_del_line(reset, ecb, data, len);
+ emit_del_line(ecb, data, len);
} else {
ecb->lno_in_postimage++;
- emit_add_line(reset, ecb, data, len);
+ emit_add_line(ecb, data, len);
}
size -= len;
data += len;
return msgbuf->buf;
}
-static unsigned long sane_truncate_line(struct emit_callback *ecb, char *line, unsigned long len)
+static unsigned long sane_truncate_line(char *line, unsigned long len)
{
const char *cp;
unsigned long allot;
static void fn_out_consume(void *priv, char *line, unsigned long len)
{
struct emit_callback *ecbdata = priv;
- const char *reset = diff_get_color(ecbdata->color_diff, DIFF_RESET);
struct diff_options *o = ecbdata->opt;
o->found_changes = 1;
if (line[0] == '@') {
if (ecbdata->diff_words)
diff_words_flush(ecbdata);
- len = sane_truncate_line(ecbdata, line, len);
+ len = sane_truncate_line(line, len);
find_lno(line, ecbdata);
emit_hunk_header(ecbdata, line, len);
return;
switch (line[0]) {
case '+':
ecbdata->lno_in_postimage++;
- emit_add_line(reset, ecbdata, line + 1, len - 1);
+ emit_add_line(ecbdata, line + 1, len - 1);
break;
case '-':
ecbdata->lno_in_preimage++;
- emit_del_line(reset, ecbdata, line + 1, len - 1);
+ emit_del_line(ecbdata, line + 1, len - 1);
break;
case ' ':
ecbdata->lno_in_postimage++;
ecbdata->lno_in_preimage++;
- emit_context_line(reset, ecbdata, line + 1, len - 1);
+ emit_context_line(ecbdata, line + 1, len - 1);
break;
default:
/* incomplete line at the end */
o->found_changes = 1;
} else {
/* Crazy xdl interfaces.. */
- const char *diffopts = getenv("GIT_DIFF_OPTS");
+ const char *diffopts;
const char *v;
xpparam_t xpp;
xdemitconf_t xecfg;
xecfg.flags |= XDL_EMIT_FUNCCONTEXT;
if (pe)
xdiff_set_find_func(&xecfg, pe->pattern, pe->cflags);
+
+ diffopts = getenv("GIT_DIFF_OPTS");
if (!diffopts)
;
else if (skip_prefix(diffopts, "--unified=", &v))
xecfg.ctxlen = strtoul(v, NULL, 10);
else if (skip_prefix(diffopts, "-u", &v))
xecfg.ctxlen = strtoul(v, NULL, 10);
+
if (o->word_diff)
init_diff_words_data(&ecbdata, o, one, two);
if (xdi_diff_outf(&mf1, &mf2, NULL, fn_out_consume,
struct diff_filespec *one,
struct diff_filespec *two,
const char *xfrm_msg,
- int complete_rewrite,
struct diff_options *o)
{
struct argv_array argv = ARGV_ARRAY_INIT;
}
if (pgm) {
- run_external_diff(pgm, name, other, one, two, xfrm_msg,
- complete_rewrite, o);
+ run_external_diff(pgm, name, other, one, two, xfrm_msg, o);
return;
}
if (one && two)
OPT_BOOL(0, "rename-empty", &options->flags.rename_empty,
N_("use empty blobs as rename source")),
+ OPT_GROUP(N_("Diff algorithm options")),
+ OPT_BIT(0, "minimal", &options->xdl_opts,
+ N_("produce the smallest possible diff"),
+ XDF_NEED_MINIMAL),
+ OPT_BIT_F('w', "ignore-all-space", &options->xdl_opts,
+ N_("ignore whitespace when comparing lines"),
+ XDF_IGNORE_WHITESPACE, PARSE_OPT_NONEG),
+ OPT_BIT_F('b', "ignore-space-change", &options->xdl_opts,
+ N_("ignore changes in amount of whitespace"),
+ XDF_IGNORE_WHITESPACE_CHANGE, PARSE_OPT_NONEG),
+ OPT_BIT_F(0, "ignore-space-at-eol", &options->xdl_opts,
+ N_("ignore changes in whitespace at EOL"),
+ XDF_IGNORE_WHITESPACE_AT_EOL, PARSE_OPT_NONEG),
+ OPT_BIT_F(0, "ignore-cr-at-eol", &options->xdl_opts,
+ N_("ignore carrier-return at the end of line"),
+ XDF_IGNORE_CR_AT_EOL, PARSE_OPT_NONEG),
+ OPT_BIT_F(0, "ignore-blank-lines", &options->xdl_opts,
+ N_("ignore changes whose lines are all blank"),
+ XDF_IGNORE_BLANK_LINES, PARSE_OPT_NONEG),
+
OPT_GROUP(N_("Diff other options")),
OPT_CALLBACK_F(0, "relative", options, N_("<prefix>"),
N_("when run from subdir, exclude changes outside and show relative paths"),
return ac;
/* xdiff options */
- if (!strcmp(arg, "--minimal"))
- DIFF_XDL_SET(options, NEED_MINIMAL);
- else if (!strcmp(arg, "--no-minimal"))
- DIFF_XDL_CLR(options, NEED_MINIMAL);
- else if (!strcmp(arg, "-w") || !strcmp(arg, "--ignore-all-space"))
- DIFF_XDL_SET(options, IGNORE_WHITESPACE);
- else if (!strcmp(arg, "-b") || !strcmp(arg, "--ignore-space-change"))
- DIFF_XDL_SET(options, IGNORE_WHITESPACE_CHANGE);
- else if (!strcmp(arg, "--ignore-space-at-eol"))
- DIFF_XDL_SET(options, IGNORE_WHITESPACE_AT_EOL);
- else if (!strcmp(arg, "--ignore-cr-at-eol"))
- DIFF_XDL_SET(options, IGNORE_CR_AT_EOL);
- else if (!strcmp(arg, "--ignore-blank-lines"))
- DIFF_XDL_SET(options, IGNORE_BLANK_LINES);
- else if (!strcmp(arg, "--indent-heuristic"))
+ if (!strcmp(arg, "--indent-heuristic"))
DIFF_XDL_SET(options, INDENT_HEURISTIC);
else if (!strcmp(arg, "--no-indent-heuristic"))
DIFF_XDL_CLR(options, INDENT_HEURISTIC);
if (cm < 0)
return error("bad --color-moved argument: %s", arg);
options->color_moved = cm;
+ } else if (!strcmp(arg, "--no-color-moved-ws")) {
+ options->color_moved_ws_handling = 0;
} else if (skip_prefix(arg, "--color-moved-ws=", &arg)) {
unsigned cm = parse_color_moved_ws(arg);
if (cm & COLOR_MOVED_WS_ERROR)
for (i = 0; i < esm.nr; i++)
free((void *)esm.buf[i].line);
+ esm.nr = 0;
+
+ o->emitted_symbols = NULL;
}
- esm.nr = 0;
}
void diff_flush(struct diff_options *options)
return strcmp(name_a, name_b);
}
-void diffcore_fix_diff_index(struct diff_options *options)
+void diffcore_fix_diff_index(void)
{
struct diff_queue_struct *q = &diff_queued_diff;
QSORT(q->queue, q->nr, diffnamecmp);