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1cecd06e36
Change the "define_categories()" and "define_category_names()" functions
to take the already-parsed output of "category_list()" as an argument,
which brings our number of passes over "command-list.txt" from three
to two.
Then have "category_list()" itself take the output of "command_list()"
as an argument, bringing the number of times we parse the file to one.
Compared to the pre-image this speeds us up quite a bit:
$ git show HEAD~:generate-cmdlist.sh >generate-cmdlist.sh.old
$ hyperfine --warmup 10 -L v ,.old 'sh generate-cmdlist.sh{v} command-list.txt'
Benchmark #1: sh generate-cmdlist.sh command-list.txt
Time (mean ± σ): 22.9 ms ± 0.3 ms [User: 15.8 ms, System: 9.6 ms]
Range (min … max): 22.5 ms … 24.0 ms 125 runs
Benchmark #2: sh generate-cmdlist.sh.old command-list.txt
Time (mean ± σ): 30.1 ms ± 0.4 ms [User: 24.4 ms, System: 17.5 ms]
Range (min … max): 29.5 ms … 32.3 ms 96 runs
Summary
'sh generate-cmdlist.sh command-list.txt' ran
1.32 ± 0.02 times faster than 'sh generate-cmdlist.sh.old command-list.txt'
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
110 lines
1.7 KiB
Bash
Executable file
110 lines
1.7 KiB
Bash
Executable file
#!/bin/sh
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die () {
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echo "$@" >&2
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exit 1
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}
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command_list () {
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while read cmd rest
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do
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case "$cmd" in
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"#"* | '')
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# Ignore comments and allow empty lines
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continue
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;;
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*)
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case "$exclude_programs" in
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*":$cmd:"*)
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;;
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*)
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echo "$cmd $rest"
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;;
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esac
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esac
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done <"$1"
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}
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category_list () {
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echo "$1" |
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cut -d' ' -f2- |
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tr ' ' '\012' |
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grep -v '^$' |
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LC_ALL=C sort -u
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}
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define_categories () {
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echo
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echo "/* Command categories */"
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bit=0
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echo "$1" |
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while read cat
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do
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echo "#define CAT_$cat (1UL << $bit)"
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bit=$(($bit+1))
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done
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test "$bit" -gt 32 && die "Urgh.. too many categories?"
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}
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define_category_names () {
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echo
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echo "/* Category names */"
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echo "static const char *category_names[] = {"
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bit=0
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echo "$1" |
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while read cat
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do
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echo " \"$cat\", /* (1UL << $bit) */"
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bit=$(($bit+1))
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done
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echo " NULL"
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echo "};"
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}
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print_command_list () {
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echo "static struct cmdname_help command_list[] = {"
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echo "$1" |
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while read cmd rest
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do
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synopsis=
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while read line
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do
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case "$line" in
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"$cmd - "*)
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synopsis=${line#$cmd - }
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break
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;;
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esac
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done <"Documentation/$cmd.txt"
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printf '\t{ "%s", N_("%s"), 0' "$cmd" "$synopsis"
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printf " | CAT_%s" $rest
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echo " },"
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done
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echo "};"
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}
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exclude_programs=:
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while test "--exclude-program" = "$1"
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do
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shift
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exclude_programs="$exclude_programs$1:"
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shift
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done
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commands="$(command_list "$1")"
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categories="$(category_list "$commands")"
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echo "/* Automatically generated by generate-cmdlist.sh */
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struct cmdname_help {
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const char *name;
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const char *help;
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uint32_t category;
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};
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"
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define_categories "$categories"
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echo
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define_category_names "$categories"
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echo
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print_command_list "$commands"
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