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generate-cmdlist.sh: do not shell out to "sed"

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Replace the "sed" invocation in get_synopsis() with a pure-shell
version. This speeds up generate-cmdlist.sh significantly. Compared to
HEAD~ (old) and "master" we are, according to hyperfine(1):

  'sh generate-cmdlist.sh command-list.txt' ran
   12.69 ± 5.01 times faster than 'sh generate-cmdlist.sh.old command-list.txt'
   18.34 ± 3.03 times faster than 'sh generate-cmdlist.sh.master command-list.txt'

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2021-11-05 15:08:06 +01:00 committed by Junio C Hamano
parent 8d5be8b421
commit 3ebeb1d6b1
1 changed files with 12 additions and 11 deletions
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23
generate-cmdlist.sh
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@ -17,16 +17,6 @@ category_list () {
LC_ALL=C sort -u
}
get_synopsis () {
sed -n '
/^NAME/,/'"$1"'/H
${
x
s/.*'"$1"' - \(.*\)/N_("\1")/
p
}' "Documentation/$1.txt"
}
define_categories () {
echo
echo "/* Command categories */"
@ -61,7 +51,18 @@ print_command_list () {
command_list "$1" |
while read cmd rest
do
printf " { \"$cmd\", $(get_synopsis $cmd), 0"
synopsis=
while read line
do
case "$line" in
"$cmd - "*)
synopsis=${line#$cmd - }
break
;;
esac
done <"Documentation/$cmd.txt"
printf '\t{ "%s", N_("%s"), 0' "$cmd" "$synopsis"
printf " | CAT_%s" $rest
echo " },"
done