[PATCH v2 0/3] Add a generated list of hooks in hook-list.h

A re-roll of this v1[1] to stop hardcoding the hook list, and instead generate it.

The v1 used a Perl script to generate the hook-list.h, it's now a shellscsript that uses "sed" instead.

The sed script is an adaptation of René's in [2]. I fixed a regression in it vis-a-vis the Perl version, we need to set LC_ALL so we don't sort the list at build-time with the locale of the user performing the build.

I also turned the two sed commands into one, with a trick that's perhaps too clever, but which has worked in my cross-platform testing so far.

1. http://lore.kernel.org/git/cover-0.3-0000000000-20210617T100239Z-avarab@gmail.com
2. https://lore.kernel.org/git/648321ed-bda9-d7fc-73e1-7ccf48addf9c@web.de/

Emily Shaffer (1):
  hook.c: add a hook_exists() wrapper and use it in bugreport.c

Ævar Arnfjörð Bjarmason (2):
  hook.[ch]: move find_hook() to this new library
  hook-list.h: add a generated list of hooks, like config-list.h

 .gitignore                          |  1 +
 Makefile                            | 11 +++++-
 builtin/am.c                        |  1 +
 builtin/bugreport.c                 | 46 +++++-----------------
 builtin/commit.c                    |  1 +
 builtin/merge.c                     |  1 +
 builtin/receive-pack.c              |  1 +
 builtin/worktree.c                  |  1 +
 contrib/buildsystems/CMakeLists.txt |  7 ++++
 generate-hooklist.sh                | 18 +++++++++
 hook.c                              | 61 +++++++++++++++++++++++++++++
 hook.h                              | 16 ++++++++
 refs.c                              |  1 +
 run-command.c                       | 35 +----------------
 run-command.h                       |  7 ----
 sequencer.c                         |  1 +
 transport.c                         |  1 +
 17 files changed, 131 insertions(+), 79 deletions(-)
 create mode 100755 generate-hooklist.sh
 create mode 100644 hook.c
 create mode 100644 hook.h

Range-diff against v1:
-:  ---------- > 1:  58c37e4f06 hook.[ch]: move find_hook() to this new library
-:  ---------- > 2:  0cf7e078ef hook.c: add a hook_exists() wrapper and use it in bugreport.c
1:  f343fc7ae6 ! 3:  ba7f01f4f6 hook-list.h: add a generated list of hooks, like config-list.h
    @@ Commit message
          - 976aaedca0 (msvc: add a Makefile target to pre-generate the Visual
            Studio solution, 2019-07-29)
     
    +    The LC_ALL=C is needed because at least in my locale the dash ("-") is
    +    ignored for the purposes of sorting, which results in a different
    +    order. I'm not aware of anything in git that has a hard dependency on
    +    the order, but e.g. the bugreport output would end up using whatever
    +    locale was in effect when git was compiled.
    +
         Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
    +    Signed-off-by: René Scharfe <l.s.r@web.de>
     
      ## .gitignore ##
     @@
    @@ Makefile: command-list.h: $(wildcard Documentation/git*.txt)
      		$(patsubst %,--exclude-program %,$(EXCLUDED_PROGRAMS)) \
      		command-list.txt >$@+ && mv $@+ $@
      
    -+hook-list.h: generate-hooklist.sh
    -+hook-list.h: Documentation/githooks.txt
    ++hook-list.h: generate-hooklist.sh Documentation/githooks.txt
     +	$(QUIET_GEN)$(SHELL_PATH) ./generate-hooklist.sh \
     +		>$@+ && mv $@+ $@
     +
    @@ contrib/buildsystems/CMakeLists.txt: if(NOT EXISTS ${CMAKE_BINARY_DIR}/config-li
      ## generate-hooklist.sh (new) ##
     @@
     +#!/bin/sh
    ++#
    ++# Usage: ./generate-hooklist.sh >hook-list.h
     +
    -+echo "/* Automatically generated by generate-hooklist.sh */"
    ++cat <<EOF
    ++/* Automatically generated by generate-hooklist.sh */
     +
    -+print_hook_list () {
    -+	cat <<EOF
     +static const char *hook_name_list[] = {
     +EOF
    -+	perl -ne '
    -+		chomp;
    -+		@l[$.] = $_;
    -+		push @h => $l[$. - 1] if /^~~~+$/s;
    -+		END {
    -+			print qq[\t"$_",\n] for sort @h;
    -+		}
    -+	' <Documentation/githooks.txt
    -+	cat <<EOF
    ++
    ++sed -n -e '/^~~~~*$/ {x; s/^.*$/	"&",/; p;}; x' \
    ++	<Documentation/githooks.txt |
    ++	LC_ALL=C sort
    ++
    ++cat <<EOF
     +	NULL,
     +};
     +EOF
    -+}
    -+
    -+echo
    -+print_hook_list
     
      ## hook.c ##
     @@