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Merge branch 'js/add-p-diff-parsing-fix'

Browse source 
Those who use diff-so-fancy as the diff-filter noticed a regression
or two in the code that parses the diff output in the built-in
version of "add -p", which has been corrected.

* js/add-p-diff-parsing-fix:
  add -p: ignore dirty submodules
  add -p: gracefully handle unparseable hunk headers in colored diffs
  add -p: detect more mismatches between plain vs colored diffs
This commit is contained in:
Junio C Hamano 2022-09-09 12:02:24 -07:00
parent 79f2338b37 0a101676e5
commit fb094cb583
2 changed files with 48 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
add-patch.c
View file

@ -238,6 +238,7 @@ struct hunk_header {
* include the newline.
*/
size_t extra_start, extra_end, colored_extra_start, colored_extra_end;
unsigned suppress_colored_line_range:1;
};
struct hunk {
@ -358,15 +359,14 @@ static int parse_hunk_header(struct add_p_state *s, struct hunk *hunk)
if (!eol)
eol = s->colored.buf + s->colored.len;
p = memmem(line, eol - line, "@@ -", 4);
if (!p)
return error(_("could not parse colored hunk header '%.*s'"),
(int)(eol - line), line);
p = memmem(p + 4, eol - p - 4, " @@", 3);
if (!p)
return error(_("could not parse colored hunk header '%.*s'"),
(int)(eol - line), line);
if (p && (p = memmem(p + 4, eol - p - 4, " @@", 3))) {
header->colored_extra_start = p + 3 - s->colored.buf;
} else {
/* could not parse colored hunk header, leave as-is */
header->colored_extra_start = hunk->colored_start;
header->suppress_colored_line_range = 1;
}
hunk->colored_start = eol - s->colored.buf + (*eol == '\n');
header->colored_extra_start = p + 3 - s->colored.buf;
header->colored_extra_end = hunk->colored_start;
return 0;
@ -419,7 +419,8 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps)
}
color_arg_index = args.nr;
/* Use `--no-color` explicitly, just in case `diff.color = always`. */
strvec_pushl(&args, "--no-color", "-p", "--", NULL);
strvec_pushl(&args, "--no-color", "--ignore-submodules=dirty", "-p",
"--", NULL);
for (i = 0; i < ps->nr; i++)
strvec_push(&args, ps->items[i].original);
@ -592,7 +593,10 @@ static int parse_diff(struct add_p_state *s, const struct pathspec *ps)
if (colored_eol)
colored_p = colored_eol + 1;
else if (p != pend)
/* colored shorter than non-colored? */
/* non-colored has more lines? */
goto mismatched_output;
else if (colored_p == colored_pend)
/* last line has no matching colored one? */
goto mismatched_output;
else
colored_p = colored_pend;
@ -656,6 +660,15 @@ static void render_hunk(struct add_p_state *s, struct hunk *hunk,
if (!colored) {
p = s->plain.buf + header->extra_start;
len = header->extra_end - header->extra_start;
} else if (header->suppress_colored_line_range) {
strbuf_add(out,
s->colored.buf + header->colored_extra_start,
header->colored_extra_end -
header->colored_extra_start);
strbuf_add(out, s->colored.buf + hunk->colored_start,
hunk->colored_end - hunk->colored_start);
return;
} else {
strbuf_addstr(out, s->s.fraginfo_color);
p = s->colored.buf + header->colored_extra_start;

27
t/t3701-add-interactive.sh
View file

@ -761,9 +761,20 @@ test_expect_success 'detect bogus diffFilter output' '
git reset --hard &&
echo content >test &&
test_config interactive.diffFilter "sed 1d" &&
test_config interactive.diffFilter "sed 6d" &&
printf y >y &&
force_color test_must_fail git add -p <y
force_color test_must_fail git add -p <y >output 2>&1 &&
grep "mismatched output" output
'
test_expect_success 'handle iffy colored hunk headers' '
git reset --hard &&
echo content >test &&
printf n >n &&
force_color git -c interactive.diffFilter="sed s/.*@@.*/XX/" \
add -p >output 2>&1 <n &&
grep "^XX$" output
'
test_expect_success 'handle very large filtered diff' '
@ -944,6 +955,18 @@ test_expect_success 'status ignores dirty submodules (except HEAD)' '
! grep dirty-otherwise output
'
test_expect_success 'handle submodules' '
echo 123 >>for-submodules/dirty-otherwise/initial.t &&
force_color git -C for-submodules add -p dirty-otherwise >output 2>&1 &&
grep "No changes" output &&
force_color git -C for-submodules add -p dirty-head >output 2>&1 <y &&
git -C for-submodules ls-files --stage dirty-head >actual &&
rev="$(git -C for-submodules/dirty-head rev-parse HEAD)" &&
grep "$rev" actual
'
test_expect_success 'set up pathological context' '
git reset --hard &&
test_write_lines a a a a a a a a a a a >a &&