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git/t/t0450-txt-doc-vs-help.sh
Ævar Arnfjörð Bjarmason a0343f3002 tests: assert consistent whitespace in -h output
Add a test for the *.txt and *.c output assertions which asserts that
for "-h" lines that aren't the "usage: " or " or: " lines they start
with the same amount of whitespace. This ensures that we won't have
buggy output like:

   [...]
   or: git tag [-n[<num>]]
               [...]
       [--create-reflog] [...]

Which should instead be like this, i.e. the options lines should be
aligned:

   [...]
   or: git tag [-n[<num>]]
               [...]
               [--create-reflog] [...]

It would be better to be able to use "test_cmp" here, i.e. to
construct the output we expect, and compare it against the actual
output.

For most built-in commands this would be rather straightforward. In
"t0450-txt-doc-vs-help.sh" we already compute the whitespace that a
"git-$builtin" needs, and strip away "usage: " or " or: " from the
start of lines. The problem is:

 * For commands that implement subcommands, such as "git bundle", we
   don't know whether e.g. "git bundle create" is the subcommand
   "create", or the argument "create" to "bundle" for the purposes of
   alignment.

   We *do* have that information from the *.txt version, since the
   part within the ''-quotes should be the command & subcommand, but
   that isn't consistent (e.g. see "git bundle" and "git
   commit-graph", only the latter is correct), and parsing that out
   would be non-trivial.

 * If we were to make this stricter we have various
   non-parse_options() users (e.g. "git diff-tree") that don't have the
   nicely aligned output which we've had since
   4631cfc20b (parse-options: properly align continued usage output,
   2021-09-21).

So rather than make perfect the enemy of the good let's assert that
for those lines that are indented they should all use the same
indentation.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-10-13 09:32:58 -07:00

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#!/bin/sh
test_description='assert (unbuilt) Documentation/*.txt and -h output
Run this with --debug to see a summary of where we still fail to make
the two versions consistent with one another.'
TEST_PASSES_SANITIZE_LEAK=true
. ./test-lib.sh
test_expect_success 'setup: list of builtins' '
git --list-cmds=builtins >builtins
'
test_expect_success 'list of txt and help mismatches is sorted' '
sort -u "$TEST_DIRECTORY"/t0450/txt-help-mismatches >expect &&
if ! test_cmp expect "$TEST_DIRECTORY"/t0450/txt-help-mismatches
then
BUG "please keep the list of txt and help mismatches sorted"
fi
'
help_to_synopsis () {
builtin="$1" &&
out_dir="out/$builtin" &&
out="$out_dir/help.synopsis" &&
if test -f "$out"
then
echo "$out" &&
return 0
fi &&
mkdir -p "$out_dir" &&
test_expect_code 129 git $builtin -h >"$out.raw" 2>&1 &&
sed -n \
-e '1,/^$/ {
/^$/d;
s/^usage: //;
s/^ *or: //;
p;
}' <"$out.raw" >"$out" &&
echo "$out"
}
builtin_to_txt () {
echo "$GIT_BUILD_DIR/Documentation/git-$1.txt"
}
txt_to_synopsis () {
builtin="$1" &&
out_dir="out/$builtin" &&
out="$out_dir/txt.synopsis" &&
if test -f "$out"
then
echo "$out" &&
return 0
fi &&
b2t="$(builtin_to_txt "$builtin")" &&
sed -n \
-e '/^\[verse\]$/,/^$/ {
/^$/d;
/^\[verse\]$/d;
s/{litdd}/--/g;
s/'\''\(git[ a-z-]*\)'\''/\1/g;
p;
}' \
<"$b2t" >"$out" &&
echo "$out"
}
check_dashed_labels () {
! grep -E "<[^>_-]+_" "$1"
}
HT=" "
align_after_nl () {
builtin="$1" &&
len=$(printf "git %s " "$builtin" | wc -c) &&
pad=$(printf "%${len}s" "") &&
sed "s/^[ $HT][ $HT]*/$pad/"
}
test_debug '>failing'
while read builtin
do
# -h output assertions
test_expect_success "$builtin -h output has no \t" '
h2s="$(help_to_synopsis "$builtin")" &&
! grep "$HT" "$h2s"
'
test_expect_success "$builtin -h output has dashed labels" '
check_dashed_labels "$(help_to_synopsis "$builtin")"
'
test_expect_success "$builtin -h output has consistent spacing" '
h2s="$(help_to_synopsis "$builtin")" &&
sed -n \
-e "/^ / {
s/[^ ].*//;
p;
}" \
<"$h2s" >help &&
sort -u help >help.ws &&
if test -s help.ws
then
test_line_count = 1 help.ws
fi
'
txt="$(builtin_to_txt "$builtin")" &&
preq="$(echo BUILTIN_TXT_$builtin | tr '[:lower:]-' '[:upper:]_')" &&
if test -f "$txt"
then
test_set_prereq "$preq"
fi &&
# *.txt output assertions
test_expect_success "$preq" "$builtin *.txt SYNOPSIS has dashed labels" '
check_dashed_labels "$(txt_to_synopsis "$builtin")"
'
# *.txt output consistency assertions
result=
if grep -q "^$builtin$" "$TEST_DIRECTORY"/t0450/txt-help-mismatches
then
result=failure
else
result=success
fi &&
test_expect_$result "$preq" "$builtin -h output and SYNOPSIS agree" '
t2s="$(txt_to_synopsis "$builtin")" &&
if test "$builtin" = "merge-tree"
then
test_when_finished "rm -f t2s.new" &&
sed -e '\''s/ (deprecated)$//g'\'' <"$t2s" >t2s.new
t2s=t2s.new
fi &&
h2s="$(help_to_synopsis "$builtin")" &&
# The *.txt and -h use different spacing for the
# alignment of continued usage output, normalize it.
align_after_nl "$builtin" <"$t2s" >txt &&
align_after_nl "$builtin" <"$h2s" >help &&
test_cmp txt help
'
if test_have_prereq "$preq" && test -e txt && test -e help
then
test_debug '
if test_cmp txt help >cmp 2>/dev/null
then
echo "=== DONE: $builtin ==="
else
echo "=== TODO: $builtin ===" &&
cat cmp
fi >>failing
'
# Not in test_expect_success in case --run is being
# used with --debug
rm -f txt help tmp 2>/dev/null
fi
done <builtins
test_debug 'say "$(cat failing)"'
test_done