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Merge pull request #12421 from XuehaiPan/shfmt-if-align

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utils/shfmt.sh: improve shell formatter usage
This commit is contained in:
Mike McQuaid 2021-11-12 12:38:42 +00:00 committed by GitHub
commit d677926d7a
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 30 additions and 20 deletions
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50
Library/Homebrew/utils/shfmt.sh
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@ -227,21 +227,21 @@ no_forbidden_styles() {
align_multiline_if_condition() {
local line
local lastline=''
local base_indent='' # indents before `if`
local extra_indent='' # 2 extra spaces for `elif`
local multiline_if_begin_regex='^( *)(el)?if '
local multiline_then_end_regex='^(.*)\; (then( *#.*)?)$'
local within_test_regex='^( *)(((! )?-[fdLrwxeszn] )|([^\[]+ == ))'
local base_indent='' # indents before `if`
local elif_extra_indent='' # 2 extra spaces for `elif`
local multiline_if_then_begin_regex='^( *)(el)?if '
local multiline_if_then_end_regex='^(.*)\; (then( *#.*)?)$'
local within_test_regex='^( *)(((! )?-[fdLrwxeszn] )|([^\[]+ (==|!=|=~) ))'
trim() {
[[ "$1" =~ [^[:space:]](.*[^[:space:]])? ]]
printf "%s" "${BASH_REMATCH[0]}"
}
if [[ "$1" =~ ${multiline_if_begin_regex} ]]
if [[ "$1" =~ ${multiline_if_then_begin_regex} ]]
then
base_indent="${BASH_REMATCH[1]}"
[[ -n "${BASH_REMATCH[2]}" ]] && extra_indent=' '
[[ -n "${BASH_REMATCH[2]}" ]] && elif_extra_indent=' ' # 2 extra spaces for `elif`
echo "$1"
shift
fi
@ -250,16 +250,21 @@ align_multiline_if_condition() {
do
line="$1"
shift
if [[ "${line}" =~ ${multiline_then_end_regex} ]]
if [[ "${line}" =~ ${multiline_if_then_end_regex} ]]
then
line="${BASH_REMATCH[1]}"
lastline="${base_indent}${BASH_REMATCH[2]}"
fi
if [[ "${line}" =~ ${within_test_regex} ]]
then
echo "${base_indent}${extra_indent} $(trim "${line}")"
# Add 3 extra spaces (6 spaces in total) to multiline test conditions
# before: after:
# if [[ -n ... || if [[ -n ... ||
# -n ... ]] -n ... ]]
# then then
echo "${base_indent}${elif_extra_indent} $(trim "${line}")"
else
echo "${base_indent}${extra_indent} $(trim "${line}")"
echo "${base_indent}${elif_extra_indent} $(trim "${line}")"
fi
done
@ -287,24 +292,28 @@ wrap_then_do() {
local -a processed=()
local -a buffer=()
local line
local singleline_then_regex='^( *)(el)?if (.+)\; (then( *#.*)?)$'
local singleline_do_regex='^( *)(for|while) (.+)\; (do( *#.*)?)$'
local multiline_if_begin_regex='^( *)(el)?if '
local multiline_then_end_regex='^(.*)\; (then( *#.*)?)$'
local singleline_if_then_fi_regex='^( *)if (.+)\; then (.+)\; fi( *#.*)?$'
local singleline_if_then_regex='^( *)(el)?if (.+)\; (then( *#.*)?)$'
local singleline_for_do_regex='^( *)(for|while) (.+)\; (do( *#.*)?)$'
local multiline_if_then_begin_regex='^( *)(el)?if '
local multiline_if_then_end_regex='^(.*)\; (then( *#.*)?)$'
while IFS='' read -r line
do
if [[ "${#buffer[@]}" == 0 ]]
then
if [[ "${line}" =~ ${singleline_then_regex} ]]
if [[ "${line}" =~ ${singleline_if_then_fi_regex} ]]
then
processed+=("${line}")
elif [[ "${line}" =~ ${singleline_if_then_regex} ]]
then
processed+=("${BASH_REMATCH[1]}${BASH_REMATCH[2]}if ${BASH_REMATCH[3]}")
processed+=("${BASH_REMATCH[1]}${BASH_REMATCH[4]}")
elif [[ "${line}" =~ ${singleline_do_regex} ]]
elif [[ "${line}" =~ ${singleline_for_do_regex} ]]
then
processed+=("${BASH_REMATCH[1]}${BASH_REMATCH[2]} ${BASH_REMATCH[3]}")
processed+=("${BASH_REMATCH[1]}${BASH_REMATCH[4]}")
elif [[ "${line}" =~ ${multiline_if_begin_regex} ]]
elif [[ "${line}" =~ ${multiline_if_then_begin_regex} ]]
then
buffer=("${line}")
else
@ -312,7 +321,7 @@ wrap_then_do() {
fi
else
buffer+=("${line}")
if [[ "${line}" =~ ${multiline_then_end_regex} ]]
if [[ "${line}" =~ ${multiline_if_then_end_regex} ]]
then
while IFS='' read -r line
do
@ -351,7 +360,7 @@ format() {
return 1
fi
tempfile="$(dirname "${file}")/.${file##*/}.temp"
tempfile="$(dirname "${file}")/.${file##*/}.formatted~"
cp -af "${file}" "${tempfile}"
fi
trap 'rm -f "${tempfile}" 2>/dev/null' RETURN
@ -396,6 +405,8 @@ format() {
then
cp -af "${tempfile}" "${file}"
else
# Show a linebreak between outputs
[[ "${RETCODE}" != 0 ]] && onoe
# Show differences
"${DIFF}" "${DIFF_ARGS[@]}" "${file}" "${tempfile}" 1>&2
fi
@ -434,7 +445,6 @@ do
4) onoe "${0##*/}: Fixable bad styles detected in file \"${file}\", run \`brew style --fix\` to apply. Formatter exited with code 4." ;;
*) onoe "${0##*/}: Failed to format file \"${file}\". Formatter exited with code ${retcode}." ;;
esac
onoe
RETCODE=1
fi
done