1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
#!/bin/sh
test_description='parallel-checkout basics
Ensure that parallel-checkout basically works on clone and checkout, spawning
the required number of workers and correctly populating both the index and the
working tree.
'
TEST_NO_CREATE_REPO=1
. ./test-lib.sh
. "$TEST_DIRECTORY/lib-parallel-checkout.sh"
# Test parallel-checkout with a branch switch containing a variety of file
# creations, deletions, and modifications, involving different entry types.
# The branches B1 and B2 have the following paths:
#
# B1 B2
# a/a (file) a (file)
# b (file) b/b (file)
#
# c/c (file) c (symlink)
# d (symlink) d/d (file)
#
# e/e (file) e (submodule)
# f (submodule) f/f (file)
#
# g (submodule) g (symlink)
# h (symlink) h (submodule)
#
# Additionally, the following paths are present on both branches, but with
# different contents:
#
# i (file) i (file)
# j (symlink) j (symlink)
# k (submodule) k (submodule)
#
# And the following paths are only present in one of the branches:
#
# l/l (file) -
# - m/m (file)
#
test_expect_success 'setup repo for checkout with various types of changes' '
git init sub &&
(
cd sub &&
git checkout -b B2 &&
echo B2 >file &&
git add file &&
git commit -m file &&
git checkout -b B1 &&
echo B1 >file &&
git add file &&
git commit -m file
) &&
git init various &&
(
cd various &&
git checkout -b B1 &&
mkdir a c e &&
echo a/a >a/a &&
echo b >b &&
echo c/c >c/c &&
test_ln_s_add c d &&
echo e/e >e/e &&
git submodule add ../sub f &&
git submodule add ../sub g &&
test_ln_s_add c h &&
echo "B1 i" >i &&
test_ln_s_add c j &&
git submodule add -b B1 ../sub k &&
mkdir l &&
echo l/l >l/l &&
git add . &&
git commit -m B1 &&
git checkout -b B2 &&
git rm -rf :^.gitmodules :^k &&
mkdir b d f &&
echo a >a &&
echo b/b >b/b &&
test_ln_s_add b c &&
echo d/d >d/d &&
git submodule add ../sub e &&
echo f/f >f/f &&
test_ln_s_add b g &&
git submodule add ../sub h &&
echo "B2 i" >i &&
test_ln_s_add b j &&
git -C k checkout B2 &&
mkdir m &&
echo m/m >m/m &&
git add . &&
git commit -m B2 &&
git checkout --recurse-submodules B1
)
'
for mode in sequential parallel sequential-fallback
do
case $mode in
sequential) workers=1 threshold=0 expected_workers=0 ;;
parallel) workers=2 threshold=0 expected_workers=2 ;;
sequential-fallback) workers=2 threshold=100 expected_workers=0 ;;
esac
test_expect_success "$mode checkout" '
repo=various_$mode &&
cp -R -P various $repo &&
# The just copied files have more recent timestamps than their
# associated index entries. So refresh the cached timestamps
# to avoid an "entry not up-to-date" error from `git checkout`.
# We only have to do this for the submodules as `git checkout`
# will already refresh the superproject index before performing
# the up-to-date check.
#
git -C $repo submodule foreach "git update-index --refresh" &&
set_checkout_config $workers $threshold &&
test_checkout_workers $expected_workers \
git -C $repo checkout --recurse-submodules B2 &&
verify_checkout $repo
'
done
for mode in parallel sequential-fallback
do
case $mode in
parallel) workers=2 threshold=0 expected_workers=2 ;;
sequential-fallback) workers=2 threshold=100 expected_workers=0 ;;
esac
test_expect_success "$mode checkout on clone" '
repo=various_${mode}_clone &&
set_checkout_config $workers $threshold &&
test_checkout_workers $expected_workers \
git clone --recurse-submodules --branch B2 various $repo &&
verify_checkout $repo
'
done
# Just to be paranoid, actually compare the working trees' contents directly.
test_expect_success 'compare the working trees' '
rm -rf various_*/.git &&
rm -rf various_*/*/.git &&
# We use `git diff` instead of `diff -r` because the latter would
# follow symlinks, and not all `diff` implementations support the
# `--no-dereference` option.
#
git diff --no-index various_sequential various_parallel &&
git diff --no-index various_sequential various_parallel_clone &&
git diff --no-index various_sequential various_sequential-fallback &&
git diff --no-index various_sequential various_sequential-fallback_clone
'
# Currently, each submodule is checked out in a separated child process, but
# these subprocesses must also be able to use parallel checkout workers to
# write the submodules' entries.
test_expect_success 'submodules can use parallel checkout' '
set_checkout_config 2 0 &&
git init super &&
(
cd super &&
git init sub &&
test_commit -C sub A &&
test_commit -C sub B &&
git submodule add ./sub &&
git commit -m sub &&
rm sub/* &&
test_checkout_workers 2 git checkout --recurse-submodules .
)
'
test_expect_success 'parallel checkout respects --[no]-force' '
set_checkout_config 2 0 &&
git init dirty &&
(
cd dirty &&
mkdir D &&
test_commit D/F &&
test_commit F &&
rm -rf D &&
echo changed >D &&
echo changed >F.t &&
# We expect 0 workers because there is nothing to be done
test_checkout_workers 0 git checkout HEAD &&
test_path_is_file D &&
grep changed D &&
grep changed F.t &&
test_checkout_workers 2 git checkout --force HEAD &&
test_path_is_dir D &&
grep D/F D/F.t &&
grep F F.t
)
'
test_expect_success SYMLINKS 'parallel checkout checks for symlinks in leading dirs' '
set_checkout_config 2 0 &&
git init symlinks &&
(
cd symlinks &&
mkdir D untracked &&
# Commit 2 files to have enough work for 2 parallel workers
test_commit D/A &&
test_commit D/B &&
rm -rf D &&
ln -s untracked D &&
test_checkout_workers 2 git checkout --force HEAD &&
! test -h D &&
grep D/A D/A.t &&
grep D/B D/B.t
)
'
# This test is here (and not in e.g. t2022-checkout-paths.sh), because we
# check the final report including sequential, parallel, and delayed entries
# all at the same time. So we must have finer control of the parallel checkout
# variables.
test_expect_success PERL '"git checkout ." report should not include failed entries' '
write_script rot13-filter.pl "$PERL_PATH" \
<"$TEST_DIRECTORY"/t0021/rot13-filter.pl &&
test_config_global filter.delay.process \
"\"$(pwd)/rot13-filter.pl\" --always-delay delayed.log clean smudge delay" &&
test_config_global filter.delay.required true &&
test_config_global filter.cat.clean cat &&
test_config_global filter.cat.smudge cat &&
test_config_global filter.cat.required true &&
set_checkout_config 2 0 &&
git init failed_entries &&
(
cd failed_entries &&
cat >.gitattributes <<-EOF &&
*delay* filter=delay
parallel-ineligible* filter=cat
EOF
echo a >missing-delay.a &&
echo a >parallel-ineligible.a &&
echo a >parallel-eligible.a &&
echo b >success-delay.b &&
echo b >parallel-ineligible.b &&
echo b >parallel-eligible.b &&
git add -A &&
git commit -m files &&
a_blob="$(git rev-parse :parallel-ineligible.a)" &&
rm .git/objects/$(test_oid_to_path $a_blob) &&
rm *.a *.b &&
test_checkout_workers 2 test_must_fail git checkout . 2>err &&
# All *.b entries should succeed and all *.a entries should fail:
# - missing-delay.a: the delay filter will drop this path
# - parallel-*.a: the blob will be missing
#
grep "Updated 3 paths from the index" err &&
test_stdout_line_count = 3 ls *.b &&
! ls *.a
)
'
test_done
|