[PATCH v2 0/4] Drop Perl dependency in a couple of subsystems

Hi,

this patch series is a follow-up to my recent series that got rid of our strict dependency on Perl for running our test suite [1]. The goal of it is to remove the dependency on Perl in a couple more areas:

  - git-filter-branch(1)

  - git-request-pull(1)

  - Building our documentation.

With these converted you can get a fully-functioning Git distribution with only a small handful of features missing:

  - gitweb.

  - Scripts to import repositories from GNU Arch, CVS and Subversion.

  - git-send-email.

  - Our Perl bindings, obviously.

  - The netrc credential helper from "contrib/".

None of these feel critical for day-to-day usage of Git, so Perl is now a truly-optional dependency of Git.

The series is built on top of 485f5f86361 (The fourth batch, 2025-04-08) with ps/test-wo-perl-prereq at 7a7b6022670 (t5703: refactor test to not depend on Perl, 2025-04-03) merged into it.

Changes in v2:
  - Loosen up semantics when parsing "^{}" from git-ls-remote(1) so that
    the new behaviour matches the old one.
  - Fix indentation of a couple of case statements.
  - Remove explicit `in "$@"` in a for loop.
  - Link to v1: https://lore.kernel.org/r/20250415-b4-pks-drop-perl-v1-0-c6addf175858@pks.im

Thanks!

Patrick

[1]: <20250320-b4-pks-t-perlless-v1-0-b1eefe27ac55@pks.im>

---
Patrick Steinhardt (4):
      filter-branch: stop depending on Perl
      request-pull: stop depending on Perl
      Documentation: stop depending on Perl to massage user manual
      Documentation: stop depending on Perl to generate command list

 Documentation/Makefile      |   8 ++--
 Documentation/cmd-list.perl |  80 ----------------------------------
 Documentation/cmd-list.sh   | 104 ++++++++++++++++++++++++++++++++++++++++++++
 Documentation/fix-texi.perl |  15 -------
 Documentation/fix-texi.sh   |  21 +++++++++
 Documentation/meson.build   |   4 +-
 git-filter-branch.sh        |  37 ++++++++--------
 git-request-pull.sh         |  74 ++++++++++++++++---------------
 meson.build                 |   2 +-
 t/t5150-request-pull.sh     |   6 ---
 10 files changed, 191 insertions(+), 160 deletions(-)

Range-diff versus v1:

1:  d0aa04cb2e9 = 1:  b48e33ada07 filter-branch: stop depending on Perl
2:  0fc604b849d ! 2:  31f54bd63e4 request-pull: stop depending on Perl
    @@ git-request-pull.sh: fi
     +	while read sha1 ref
     +	do
     +		case "$ref" in
    -+		*"^{}")
    -+			ref="${ref%"^{}"}"
    ++		*"^"?*)
    ++			ref="${ref%"^"*}"
     +			deref=true
     +			;;
     +		*)
3:  75dd9df3d83 = 3:  788fb204917 Documentation: stop depending on Perl to massage user manual
4:  9c4b5c330b4 ! 4:  c770a80762b Documentation: stop depending on Perl to generate command list
    @@ Documentation/cmd-list.sh (new)
     +	while read line
     +	do
     +		case "$state" in
    -+			0)
    -+				case "$line" in
    -+				git*\(*\)|scalar*\(*\))
    -+					mansection="${line##*\(}"
    -+					mansection="${mansection%\)}"
    -+					;;
    -+				NAME)
    -+					state=1;;
    -+				esac
    -+				;;
    -+			1)
    -+				if test "$line" = "----"
    -+				then
    -+					state=2
    -+				fi
    -+				;;
    -+			2)
    -+				description="$line"
    -+				break
    ++		0)
    ++			case "$line" in
    ++			git*\(*\)|scalar*\(*\))
    ++				mansection="${line##*\(}"
    ++				mansection="${mansection%\)}"
     +				;;
    ++			NAME)
    ++				state=1;;
    ++			esac
    ++			;;
    ++		1)
    ++			if test "$line" = "----"
    ++			then
    ++				state=2
    ++			fi
    ++			;;
    ++		2)
    ++			description="$line"
    ++			break
    ++			;;
     +		esac
     +	done <"$path"
     +
    @@ Documentation/cmd-list.sh (new)
     +	fi
     +
     +	case "$description" in
    -+		"$command - "*)
    -+			text="${description#$command - }"
    ++	"$command - "*)
    ++		text="${description#$command - }"
     +
    -+			printf "linkgit:%s[%s]::\n\t" "$command" "$mansection"
    -+			case "$attributes" in
    -+				*" deprecated "*)
    -+					printf "(deprecated) "
    -+					;;
    -+			esac
    -+			printf "$text.\n\n"
    -+			;;
    -+		*)
    -+			echo >&2 "Description does not match $command: $description"
    -+			exit 1
    ++		printf "linkgit:%s[%s]::\n\t" "$command" "$mansection"
    ++		case "$attributes" in
    ++		*" deprecated "*)
    ++			printf "(deprecated) "
     +			;;
    ++		esac
    ++		printf "$text.\n\n"
    ++		;;
    ++	*)
    ++		echo >&2 "Description does not match $command: $description"
    ++		exit 1
    ++		;;
     +	esac
     +}
     +
    @@ Documentation/cmd-list.sh (new)
     +build_dir="$2"
     +shift 2
     +
    -+for out in "$@"
    ++for out
     +do
     +	category="${out#cmds-}"
     +	category="${category%.adoc}"

--- base-commit: b09b3d4791ed248fed65de18cd6d8c084f7f0280 change-id: 20250409-b4-pks-drop-perl-574571234e3c