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Matheus Tavares 45bde58ef8 grep: demonstrate bug with textconv attributes and submodules 
In some circumstances, "git grep --textconv --recurse-submodules"
ignores the textconv attributes from the submodules and erroneously
applies the attributes defined in the superproject on the submodules'
files. The textconv cache is also saved on the superproject, even for
submodule objects.

A fix for these problems will probably require at least three changes:

- Some textconv and attributes functions (as well as their callees) will
  have to be adjusted to work with arbitrary repositories. Note that
  "fill_textconv()", for example, already receives a "struct repository"
  but it writes the textconv cache using "write_loose_object()", which
  implicitly works on "the_repository".

- grep.c functions will have to call textconv/userdiff routines passing
  the "repo" field from "struct grep_source" instead of the one from
  "struct grep_opt". The latter always points to "the_repository" on
  "git grep" executions (see its initialization in builtin/grep.c), but
  the former points to the correct repository that each source (an
  object, file, or buffer) comes from.

- "userdiff_find_by_path()" might need to use a different attributes
  stack for each repository it works on or reset its internal static
  stack when the repository is changed throughout the calls.

For now, let's add some tests to demonstrate these problems, and also
update a NEEDSWORK comment in grep.h that mentions this bug to reference
the added tests.

Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-29 13:19:38 -07:00

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#!/bin/sh
test_description='Test grep recurse-submodules feature
This test verifies the recurse-submodules feature correctly greps across
submodules.
'
. ./test-lib.sh
GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB=1
export GIT_TEST_FATAL_REGISTER_SUBMODULE_ODB
test_expect_success 'setup directory structure and submodule' '
echo "(1|2)d(3|4)" >a &&
mkdir b &&
echo "(3|4)" >b/b &&
git add a b &&
git commit -m "add a and b" &&
test_tick &&
git init submodule &&
echo "(1|2)d(3|4)" >submodule/a &&
git -C submodule add a &&
git -C submodule commit -m "add a" &&
git submodule add ./submodule &&
git commit -m "added submodule" &&
test_tick
'
test_expect_success 'grep correctly finds patterns in a submodule' '
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
b/b:(3|4)
submodule/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules >actual &&
test_cmp expect actual
'
test_expect_success 'grep finds patterns in a submodule via config' '
test_config submodule.recurse true &&
# expect from previous test
git grep -e "(3|4)" >actual &&
test_cmp expect actual
'
test_expect_success 'grep --no-recurse-submodules overrides config' '
test_config submodule.recurse true &&
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
b/b:(3|4)
EOF
git grep -e "(3|4)" --no-recurse-submodules >actual &&
test_cmp expect actual
'
test_expect_success 'grep and basic pathspecs' '
cat >expect <<-\EOF &&
submodule/a:(1|2)d(3|4)
EOF
git grep -e. --recurse-submodules -- submodule >actual &&
test_cmp expect actual
'
test_expect_success 'grep and nested submodules' '
git init submodule/sub &&
echo "(1|2)d(3|4)" >submodule/sub/a &&
git -C submodule/sub add a &&
git -C submodule/sub commit -m "add a" &&
test_tick &&
git -C submodule submodule add ./sub &&
git -C submodule add sub &&
git -C submodule commit -m "added sub" &&
test_tick &&
git add submodule &&
git commit -m "updated submodule" &&
test_tick &&
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
b/b:(3|4)
submodule/a:(1|2)d(3|4)
submodule/sub/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules >actual &&
test_cmp expect actual
'
test_expect_success 'grep and multiple patterns' '
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
submodule/a:(1|2)d(3|4)
submodule/sub/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --and -e "(1|2)" --recurse-submodules >actual &&
test_cmp expect actual
'
test_expect_success 'grep and multiple patterns' '
cat >expect <<-\EOF &&
b/b:(3|4)
EOF
git grep -e "(3|4)" --and --not -e "(1|2)" --recurse-submodules >actual &&
test_cmp expect actual
'
test_expect_success 'basic grep tree' '
cat >expect <<-\EOF &&
HEAD:a:(1|2)d(3|4)
HEAD:b/b:(3|4)
HEAD:submodule/a:(1|2)d(3|4)
HEAD:submodule/sub/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'grep tree HEAD^' '
cat >expect <<-\EOF &&
HEAD^:a:(1|2)d(3|4)
HEAD^:b/b:(3|4)
HEAD^:submodule/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules HEAD^ >actual &&
test_cmp expect actual
'
test_expect_success 'grep tree HEAD^^' '
cat >expect <<-\EOF &&
HEAD^^:a:(1|2)d(3|4)
HEAD^^:b/b:(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules HEAD^^ >actual &&
test_cmp expect actual
'
test_expect_success 'grep tree and pathspecs' '
cat >expect <<-\EOF &&
HEAD:submodule/a:(1|2)d(3|4)
HEAD:submodule/sub/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules HEAD -- submodule >actual &&
test_cmp expect actual
'
test_expect_success 'grep tree and pathspecs' '
cat >expect <<-\EOF &&
HEAD:submodule/a:(1|2)d(3|4)
HEAD:submodule/sub/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules HEAD -- "submodule*a" >actual &&
test_cmp expect actual
'
test_expect_success 'grep tree and more pathspecs' '
cat >expect <<-\EOF &&
HEAD:submodule/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules HEAD -- "submodul?/a" >actual &&
test_cmp expect actual
'
test_expect_success 'grep tree and more pathspecs' '
cat >expect <<-\EOF &&
HEAD:submodule/sub/a:(1|2)d(3|4)
EOF
git grep -e "(3|4)" --recurse-submodules HEAD -- "submodul*/sub/a" >actual &&
test_cmp expect actual
'
test_expect_success !MINGW 'grep recurse submodule colon in name' '
git init parent &&
test_when_finished "rm -rf parent" &&
echo "(1|2)d(3|4)" >"parent/fi:le" &&
git -C parent add "fi:le" &&
git -C parent commit -m "add fi:le" &&
test_tick &&
git init "su:b" &&
test_when_finished "rm -rf su:b" &&
echo "(1|2)d(3|4)" >"su:b/fi:le" &&
git -C "su:b" add "fi:le" &&
git -C "su:b" commit -m "add fi:le" &&
test_tick &&
git -C parent submodule add "../su:b" "su:b" &&
git -C parent commit -m "add submodule" &&
test_tick &&
cat >expect <<-\EOF &&
fi:le:(1|2)d(3|4)
su:b/fi:le:(1|2)d(3|4)
EOF
git -C parent grep -e "(1|2)d(3|4)" --recurse-submodules >actual &&
test_cmp expect actual &&
cat >expect <<-\EOF &&
HEAD:fi:le:(1|2)d(3|4)
HEAD:su:b/fi:le:(1|2)d(3|4)
EOF
git -C parent grep -e "(1|2)d(3|4)" --recurse-submodules HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'grep history with moved submoules' '
git init parent &&
test_when_finished "rm -rf parent" &&
echo "(1|2)d(3|4)" >parent/file &&
git -C parent add file &&
git -C parent commit -m "add file" &&
test_tick &&
git init sub &&
test_when_finished "rm -rf sub" &&
echo "(1|2)d(3|4)" >sub/file &&
git -C sub add file &&
git -C sub commit -m "add file" &&
test_tick &&
git -C parent submodule add ../sub dir/sub &&
git -C parent commit -m "add submodule" &&
test_tick &&
cat >expect <<-\EOF &&
dir/sub/file:(1|2)d(3|4)
file:(1|2)d(3|4)
EOF
git -C parent grep -e "(1|2)d(3|4)" --recurse-submodules >actual &&
test_cmp expect actual &&
git -C parent mv dir/sub sub-moved &&
git -C parent commit -m "moved submodule" &&
test_tick &&
cat >expect <<-\EOF &&
file:(1|2)d(3|4)
sub-moved/file:(1|2)d(3|4)
EOF
git -C parent grep -e "(1|2)d(3|4)" --recurse-submodules >actual &&
test_cmp expect actual &&
cat >expect <<-\EOF &&
HEAD^:dir/sub/file:(1|2)d(3|4)
HEAD^:file:(1|2)d(3|4)
EOF
git -C parent grep -e "(1|2)d(3|4)" --recurse-submodules HEAD^ >actual &&
test_cmp expect actual
'
test_expect_success 'grep using relative path' '
test_when_finished "rm -rf parent sub" &&
git init sub &&
echo "(1|2)d(3|4)" >sub/file &&
git -C sub add file &&
git -C sub commit -m "add file" &&
test_tick &&
git init parent &&
echo "(1|2)d(3|4)" >parent/file &&
git -C parent add file &&
mkdir parent/src &&
echo "(1|2)d(3|4)" >parent/src/file2 &&
git -C parent add src/file2 &&
git -C parent submodule add ../sub &&
git -C parent commit -m "add files and submodule" &&
test_tick &&
# From top works
cat >expect <<-\EOF &&
file:(1|2)d(3|4)
src/file2:(1|2)d(3|4)
sub/file:(1|2)d(3|4)
EOF
git -C parent grep --recurse-submodules -e "(1|2)d(3|4)" >actual &&
test_cmp expect actual &&
# Relative path to top
cat >expect <<-\EOF &&
../file:(1|2)d(3|4)
file2:(1|2)d(3|4)
../sub/file:(1|2)d(3|4)
EOF
git -C parent/src grep --recurse-submodules -e "(1|2)d(3|4)" -- .. >actual &&
test_cmp expect actual &&
# Relative path to submodule
cat >expect <<-\EOF &&
../sub/file:(1|2)d(3|4)
EOF
git -C parent/src grep --recurse-submodules -e "(1|2)d(3|4)" -- ../sub >actual &&
test_cmp expect actual
'
test_expect_success 'grep from a subdir' '
test_when_finished "rm -rf parent sub" &&
git init sub &&
echo "(1|2)d(3|4)" >sub/file &&
git -C sub add file &&
git -C sub commit -m "add file" &&
test_tick &&
git init parent &&
mkdir parent/src &&
echo "(1|2)d(3|4)" >parent/src/file &&
git -C parent add src/file &&
git -C parent submodule add ../sub src/sub &&
git -C parent submodule add ../sub sub &&
git -C parent commit -m "add files and submodules" &&
test_tick &&
# Verify grep from root works
cat >expect <<-\EOF &&
src/file:(1|2)d(3|4)
src/sub/file:(1|2)d(3|4)
sub/file:(1|2)d(3|4)
EOF
git -C parent grep --recurse-submodules -e "(1|2)d(3|4)" >actual &&
test_cmp expect actual &&
# Verify grep from a subdir works
cat >expect <<-\EOF &&
file:(1|2)d(3|4)
sub/file:(1|2)d(3|4)
EOF
git -C parent/src grep --recurse-submodules -e "(1|2)d(3|4)" >actual &&
test_cmp expect actual
'
test_incompatible_with_recurse_submodules ()
{
test_expect_success "--recurse-submodules and $1 are incompatible" "
test_must_fail git grep -e. --recurse-submodules $1 2>actual &&
test_i18ngrep 'not supported with --recurse-submodules' actual
"
}
test_incompatible_with_recurse_submodules --untracked
test_expect_success 'grep --recurse-submodules --no-index ignores --recurse-submodules' '
git grep --recurse-submodules --no-index -e "^(.|.)[\d]" >actual &&
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
submodule/a:(1|2)d(3|4)
submodule/sub/a:(1|2)d(3|4)
EOF
test_cmp expect actual
'
test_expect_success 'grep --recurse-submodules should pass the pattern type along' '
# Fixed
test_must_fail git grep -F --recurse-submodules -e "(.|.)[\d]" &&
test_must_fail git -c grep.patternType=fixed grep --recurse-submodules -e "(.|.)[\d]" &&
# Basic
git grep -G --recurse-submodules -e "(.|.)[\d]" >actual &&
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
submodule/a:(1|2)d(3|4)
submodule/sub/a:(1|2)d(3|4)
EOF
test_cmp expect actual &&
git -c grep.patternType=basic grep --recurse-submodules -e "(.|.)[\d]" >actual &&
test_cmp expect actual &&
# Extended
git grep -E --recurse-submodules -e "(.|.)[\d]" >actual &&
cat >expect <<-\EOF &&
.gitmodules:[submodule "submodule"]
.gitmodules: path = submodule
.gitmodules: url = ./submodule
a:(1|2)d(3|4)
submodule/.gitmodules:[submodule "sub"]
submodule/a:(1|2)d(3|4)
submodule/sub/a:(1|2)d(3|4)
EOF
test_cmp expect actual &&
git -c grep.patternType=extended grep --recurse-submodules -e "(.|.)[\d]" >actual &&
test_cmp expect actual &&
git -c grep.extendedRegexp=true grep --recurse-submodules -e "(.|.)[\d]" >actual &&
test_cmp expect actual &&
# Perl
if test_have_prereq PCRE
then
git grep -P --recurse-submodules -e "(.|.)[\d]" >actual &&
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
b/b:(3|4)
submodule/a:(1|2)d(3|4)
submodule/sub/a:(1|2)d(3|4)
EOF
test_cmp expect actual &&
git -c grep.patternType=perl grep --recurse-submodules -e "(.|.)[\d]" >actual &&
test_cmp expect actual
fi
'
test_expect_success 'grep --recurse-submodules with submodules without .gitmodules in the working tree' '
test_when_finished "git -C submodule checkout .gitmodules" &&
rm submodule/.gitmodules &&
git grep --recurse-submodules -e "(.|.)[\d]" >actual &&
cat >expect <<-\EOF &&
a:(1|2)d(3|4)
submodule/a:(1|2)d(3|4)
submodule/sub/a:(1|2)d(3|4)
EOF
test_cmp expect actual
'
reset_and_clean () {
git reset --hard &&
git clean -fd &&
git submodule foreach --recursive 'git reset --hard' &&
git submodule foreach --recursive 'git clean -fd'
}
test_expect_success 'grep --recurse-submodules without --cached considers worktree modifications' '
reset_and_clean &&
echo "A modified line in submodule" >>submodule/a &&
echo "submodule/a:A modified line in submodule" >expect &&
git grep --recurse-submodules "A modified line in submodule" >actual &&
test_cmp expect actual
'
test_expect_success 'grep --recurse-submodules with --cached ignores worktree modifications' '
reset_and_clean &&
echo "A modified line in submodule" >>submodule/a &&
test_must_fail git grep --recurse-submodules --cached "A modified line in submodule" >actual 2>&1 &&
test_must_be_empty actual
'
test_expect_failure 'grep --textconv: superproject .gitattributes does not affect submodules' '
reset_and_clean &&
test_config_global diff.d2x.textconv "sed -e \"s/d/x/\"" &&
echo "a diff=d2x" >.gitattributes &&
cat >expect <<-\EOF &&
a:(1|2)x(3|4)
EOF
git grep --textconv --recurse-submodules x >actual &&
test_cmp expect actual
'
test_expect_failure 'grep --textconv: superproject .gitattributes (from index) does not affect submodules' '
reset_and_clean &&
test_config_global diff.d2x.textconv "sed -e \"s/d/x/\"" &&
echo "a diff=d2x" >.gitattributes &&
git add .gitattributes &&
rm .gitattributes &&
cat >expect <<-\EOF &&
a:(1|2)x(3|4)
EOF
git grep --textconv --recurse-submodules x >actual &&
test_cmp expect actual
'
test_expect_failure 'grep --textconv: superproject .git/info/attributes does not affect submodules' '
reset_and_clean &&
test_config_global diff.d2x.textconv "sed -e \"s/d/x/\"" &&
super_attr="$(git rev-parse --git-path info/attributes)" &&
test_when_finished "rm -f \"$super_attr\"" &&
echo "a diff=d2x" >"$super_attr" &&
cat >expect <<-\EOF &&
a:(1|2)x(3|4)
EOF
git grep --textconv --recurse-submodules x >actual &&
test_cmp expect actual
'
# Note: what currently prevents this test from passing is not that the
# .gitattributes file from "./submodule" is being ignored, but that it is being
# propagated to the nested "./submodule/sub" files.
#
test_expect_failure 'grep --textconv correctly reads submodule .gitattributes' '
reset_and_clean &&
test_config_global diff.d2x.textconv "sed -e \"s/d/x/\"" &&
echo "a diff=d2x" >submodule/.gitattributes &&
cat >expect <<-\EOF &&
submodule/a:(1|2)x(3|4)
EOF
git grep --textconv --recurse-submodules x >actual &&
test_cmp expect actual
'
test_expect_failure 'grep --textconv correctly reads submodule .gitattributes (from index)' '
reset_and_clean &&
test_config_global diff.d2x.textconv "sed -e \"s/d/x/\"" &&
echo "a diff=d2x" >submodule/.gitattributes &&
git -C submodule add .gitattributes &&
rm submodule/.gitattributes &&
cat >expect <<-\EOF &&
submodule/a:(1|2)x(3|4)
EOF
git grep --textconv --recurse-submodules x >actual &&
test_cmp expect actual
'
test_expect_failure 'grep --textconv correctly reads submodule .git/info/attributes' '
reset_and_clean &&
test_config_global diff.d2x.textconv "sed -e \"s/d/x/\"" &&
submodule_attr="$(git -C submodule rev-parse --path-format=absolute --git-path info/attributes)" &&
test_when_finished "rm -f \"$submodule_attr\"" &&
echo "a diff=d2x" >"$submodule_attr" &&
cat >expect <<-\EOF &&
submodule/a:(1|2)x(3|4)
EOF
git grep --textconv --recurse-submodules x >actual &&
test_cmp expect actual
'
test_expect_failure 'grep saves textconv cache in the appropriate repository' '
reset_and_clean &&
test_config_global diff.d2x_cached.textconv "sed -e \"s/d/x/\"" &&
test_config_global diff.d2x_cached.cachetextconv true &&
echo "a diff=d2x_cached" >submodule/.gitattributes &&
# We only read/write to the textconv cache when grepping from an OID,
# as the working tree file might have modifications.
git grep --textconv --cached --recurse-submodules x &&
super_textconv_cache="$(git rev-parse --git-path refs/notes/textconv/d2x_cached)" &&
sub_textconv_cache="$(git -C submodule rev-parse \
--path-format=absolute --git-path refs/notes/textconv/d2x_cached)" &&
test_path_is_missing "$super_textconv_cache" &&
test_path_is_file "$sub_textconv_cache"
'
test_done
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