merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 437 insertions, 0 deletions

diff --git a/third_party/git/t/t8014-blame-ignore-fuzzy.sh b/third_party/git/t/t8014-blame-ignore-fuzzy.sh
new file mode 100755
index 0000000000..6e61882b6f
--- /dev/null
+++ b/third_party/git/t/t8014-blame-ignore-fuzzy.sh
@@ -0,0 +1,437 @@
+#!/bin/sh
+
+test_description='git blame ignore fuzzy heuristic'
+. ./test-lib.sh
+
+pick_author='s/^[0-9a-f^]* *(\([^ ]*\) .*/\1/'
+
+# Each test is composed of 4 variables:
+# titleN - the test name
+# aN - the initial content
+# bN - the final content
+# expectedN - the line numbers from aN that we expect git blame
+#             on bN to identify, or "Final" if bN itself should
+#             be identified as the origin of that line.
+
+# We start at test 2 because setup will show as test 1
+title2="Regression test for partially overlapping search ranges"
+cat <<EOF >a2
+1
+2
+3
+abcdef
+5
+6
+7
+ijkl
+9
+10
+11
+pqrs
+13
+14
+15
+wxyz
+17
+18
+19
+EOF
+cat <<EOF >b2
+abcde
+ijk
+pqr
+wxy
+EOF
+cat <<EOF >expected2
+4
+8
+12
+16
+EOF
+
+title3="Combine 3 lines into 2"
+cat <<EOF >a3
+if ((maxgrow==0) ||
+	( single_line_field && (field->dcols < maxgrow)) ||
+	(!single_line_field && (field->drows < maxgrow)))
+EOF
+cat <<EOF >b3
+if ((maxgrow == 0) || (single_line_field && (field->dcols < maxgrow)) ||
+	(!single_line_field && (field->drows < maxgrow))) {
+EOF
+cat <<EOF >expected3
+2
+3
+EOF
+
+title4="Add curly brackets"
+cat <<EOF >a4
+	if (rows) *rows = field->rows;
+	if (cols) *cols = field->cols;
+	if (frow) *frow = field->frow;
+	if (fcol) *fcol = field->fcol;
+EOF
+cat <<EOF >b4
+	if (rows) {
+		*rows = field->rows;
+	}
+	if (cols) {
+		*cols = field->cols;
+	}
+	if (frow) {
+		*frow = field->frow;
+	}
+	if (fcol) {
+		*fcol = field->fcol;
+	}
+EOF
+cat <<EOF >expected4
+1
+1
+Final
+2
+2
+Final
+3
+3
+Final
+4
+4
+Final
+EOF
+
+
+title5="Combine many lines and change case"
+cat <<EOF >a5
+for(row=0,pBuffer=field->buf;
+	row<height;
+	row++,pBuffer+=width )
+{
+	if ((len = (int)( After_End_Of_Data( pBuffer, width ) - pBuffer )) > 0)
+	{
+		wmove( win, row, 0 );
+		waddnstr( win, pBuffer, len );
+EOF
+cat <<EOF >b5
+for (Row = 0, PBuffer = field->buf; Row < Height; Row++, PBuffer += Width) {
+	if ((Len = (int)(afterEndOfData(PBuffer, Width) - PBuffer)) > 0) {
+		wmove(win, Row, 0);
+		waddnstr(win, PBuffer, Len);
+EOF
+cat <<EOF >expected5
+1
+5
+7
+8
+EOF
+
+title6="Rename and combine lines"
+cat <<EOF >a6
+bool need_visual_update = ((form != (FORM *)0)      &&
+	(form->status & _POSTED) &&
+	(form->current==field));
+
+if (need_visual_update)
+	Synchronize_Buffer(form);
+
+if (single_line_field)
+{
+	growth = field->cols * amount;
+	if (field->maxgrow)
+		growth = Minimum(field->maxgrow - field->dcols,growth);
+	field->dcols += growth;
+	if (field->dcols == field->maxgrow)
+EOF
+cat <<EOF >b6
+bool NeedVisualUpdate = ((Form != (FORM *)0) && (Form->status & _POSTED) &&
+	(Form->current == field));
+
+if (NeedVisualUpdate) {
+	synchronizeBuffer(Form);
+}
+
+if (SingleLineField) {
+	Growth = field->cols * amount;
+	if (field->maxgrow) {
+		Growth = Minimum(field->maxgrow - field->dcols, Growth);
+	}
+	field->dcols += Growth;
+	if (field->dcols == field->maxgrow) {
+EOF
+cat <<EOF >expected6
+1
+3
+4
+5
+6
+Final
+7
+8
+10
+11
+12
+Final
+13
+14
+EOF
+
+# Both lines match identically so position must be used to tie-break.
+title7="Same line twice"
+cat <<EOF >a7
+abc
+abc
+EOF
+cat <<EOF >b7
+abcd
+abcd
+EOF
+cat <<EOF >expected7
+1
+2
+EOF
+
+title8="Enforce line order"
+cat <<EOF >a8
+abcdef
+ghijkl
+ab
+EOF
+cat <<EOF >b8
+ghijk
+abcd
+EOF
+cat <<EOF >expected8
+2
+3
+EOF
+
+title9="Expand lines and rename variables"
+cat <<EOF >a9
+int myFunction(int ArgumentOne, Thing *ArgTwo, Blah XuglyBug) {
+	Squiggle FabulousResult = squargle(ArgumentOne, *ArgTwo,
+		XuglyBug) + EwwwGlobalWithAReallyLongNameYepTooLong;
+	return FabulousResult * 42;
+}
+EOF
+cat <<EOF >b9
+int myFunction(int argument_one, Thing *arg_asdfgh,
+	Blah xugly_bug) {
+	Squiggle fabulous_result = squargle(argument_one,
+		*arg_asdfgh, xugly_bug)
+		+ g_ewww_global_with_a_really_long_name_yep_too_long;
+	return fabulous_result * 42;
+}
+EOF
+cat <<EOF >expected9
+1
+1
+2
+3
+3
+4
+5
+EOF
+
+title10="Two close matches versus one less close match"
+cat <<EOF >a10
+abcdef
+abcdef
+ghijkl
+EOF
+cat <<EOF >b10
+gh
+abcdefx
+EOF
+cat <<EOF >expected10
+Final
+2
+EOF
+
+# The first line of b matches best with the last line of a, but the overall
+# match is better if we match it with the the first line of a.
+title11="Piggy in the middle"
+cat <<EOF >a11
+abcdefg
+ijklmn
+abcdefgh
+EOF
+cat <<EOF >b11
+abcdefghx
+ijklm
+EOF
+cat <<EOF >expected11
+1
+2
+EOF
+
+title12="No trailing newline"
+printf "abc\ndef" >a12
+printf "abx\nstu" >b12
+cat <<EOF >expected12
+1
+Final
+EOF
+
+title13="Reorder includes"
+cat <<EOF >a13
+#include "c.h"
+#include "b.h"
+#include "a.h"
+#include "e.h"
+#include "d.h"
+EOF
+cat <<EOF >b13
+#include "a.h"
+#include "b.h"
+#include "c.h"
+#include "d.h"
+#include "e.h"
+EOF
+cat <<EOF >expected13
+3
+2
+1
+5
+4
+EOF
+
+last_test=13
+
+test_expect_success setup '
+	for i in $(test_seq 2 $last_test)
+	do
+		# Append each line in a separate commit to make it easy to
+		# check which original line the blame output relates to.
+
+		line_count=0 &&
+		while IFS= read line
+		do
+			line_count=$((line_count+1)) &&
+			echo "$line" >>"$i" &&
+			git add "$i" &&
+			test_tick &&
+			GIT_AUTHOR_NAME="$line_count" git commit -m "$line_count"
+		done <"a$i"
+	done &&
+
+	for i in $(test_seq 2 $last_test)
+	do
+		# Overwrite the files with the final content.
+		cp b$i $i &&
+		git add $i
+	done &&
+	test_tick &&
+
+	# Commit the final content all at once so it can all be
+	# referred to with the same commit ID.
+	GIT_AUTHOR_NAME=Final git commit -m Final &&
+
+	IGNOREME=$(git rev-parse HEAD)
+'
+
+for i in $(test_seq 2 $last_test); do
+	eval title="\$title$i"
+	test_expect_success "$title" \
+	"git blame -M9 --ignore-rev $IGNOREME $i >output &&
+	sed -e \"$pick_author\" output >actual &&
+	test_cmp expected$i actual"
+done
+
+# This invoked a null pointer dereference when the chunk callback was called
+# with a zero length parent chunk and there were no more suspects.
+test_expect_success 'Diff chunks with no suspects' '
+	test_write_lines xy1 A B C xy1 >file &&
+	git add file &&
+	test_tick &&
+	GIT_AUTHOR_NAME=1 git commit -m 1 &&
+
+	test_write_lines xy2 A B xy2 C xy2 >file &&
+	git add file &&
+	test_tick &&
+	GIT_AUTHOR_NAME=2 git commit -m 2 &&
+	REV_2=$(git rev-parse HEAD) &&
+
+	test_write_lines xy3 A >file &&
+	git add file &&
+	test_tick &&
+	GIT_AUTHOR_NAME=3 git commit -m 3 &&
+	REV_3=$(git rev-parse HEAD) &&
+
+	test_write_lines 1 1 >expected &&
+
+	git blame --ignore-rev $REV_2 --ignore-rev $REV_3 file >output &&
+	sed -e "$pick_author" output >actual &&
+
+	test_cmp expected actual
+	'
+
+test_expect_success 'position matching' '
+	test_write_lines abc def >file2 &&
+	git add file2 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=1 git commit -m 1 &&
+
+	test_write_lines abc def abc def >file2 &&
+	git add file2 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=2 git commit -m 2 &&
+
+	test_write_lines abcx defx abcx defx >file2 &&
+	git add file2 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=3 git commit -m 3 &&
+	REV_3=$(git rev-parse HEAD) &&
+
+	test_write_lines abcy defy abcx defx >file2 &&
+	git add file2 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=4 git commit -m 4 &&
+	REV_4=$(git rev-parse HEAD) &&
+
+	test_write_lines 1 1 2 2 >expected &&
+
+	git blame --ignore-rev $REV_3 --ignore-rev $REV_4 file2 >output &&
+	sed -e "$pick_author" output >actual &&
+
+	test_cmp expected actual
+	'
+
+# This fails if each blame entry is processed independently instead of
+# processing each diff change in full.
+test_expect_success 'preserve order' '
+	test_write_lines bcde >file3 &&
+	git add file3 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=1 git commit -m 1 &&
+
+	test_write_lines bcde fghij >file3 &&
+	git add file3 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=2 git commit -m 2 &&
+
+	test_write_lines bcde fghij abcd >file3 &&
+	git add file3 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=3 git commit -m 3 &&
+
+	test_write_lines abcdx fghijx bcdex >file3 &&
+	git add file3 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=4 git commit -m 4 &&
+	REV_4=$(git rev-parse HEAD) &&
+
+	test_write_lines abcdx fghijy bcdex >file3 &&
+	git add file3 &&
+	test_tick &&
+	GIT_AUTHOR_NAME=5 git commit -m 5 &&
+	REV_5=$(git rev-parse HEAD) &&
+
+	test_write_lines 1 2 3 >expected &&
+
+	git blame --ignore-rev $REV_4 --ignore-rev $REV_5 file3 >output &&
+	sed -e "$pick_author" output >actual &&
+
+	test_cmp expected actual
+	'
+
+test_done