Update OpenWrt Git packages

1. update-to-git-head.sh

#!/usr/bin/env bash

MAKEFILE=$1
COMMIT=${2:-HEAD}
TOPDIR=$3

MAKE=$(which gmake) || MAKE=$(which make)
FIND=$(which gfind) || FIND=$(which find)

[ -x "$MAKE" ] || {
	echo "Unable to locate `make` executable" >&2
	exit 1
}

[ -x "$FIND" ] || {
	echo "Unable to locate `find` executable" >&2
	exit 1
}

[ -e "$MAKEFILE" ] || {
	MAKEFILE=$("$FIND" "${TOPDIR:-.}/package/" -type f -path "*/$MAKEFILE/Makefile" | head -n1)
}

[ -f "$MAKEFILE" ] || {
	echo "Usage: $0 <path/to/Makefile> [target commit] [path/to/buildroot/topdir]"
	exit 1
}

grep -sq BuildPackage "$MAKEFILE" || {
	echo "The file '$MAKEFILE' does not appear to be an OpenWrt package Makefile." >&2
	exit 1
}

[ -n "$TOPDIR" ] || {
	TOPDIR=$(cd "$(dirname "$MAKEFILE")"; pwd)

	while [ "$TOPDIR" != "/" ]; do
		TOPDIR=$(dirname "$TOPDIR")
		[ -f "$TOPDIR/rules.mk" ] && break
	done

	[ -f "$TOPDIR/rules.mk" ] || {
		echo "Unable to determine buildroot directory." >&2
		exit 1
	}
}

export TOPDIR

eval $(
	"$MAKE" --no-print-directory -C "$(dirname "$MAKEFILE")" \
		var.PKG_NAME \
		var.PKG_RELEASE \
		var.PKG_SOURCE_PROTO \
		var.PKG_SOURCE_URL \
		var.PKG_SOURCE_DATE \
		var.PKG_SOURCE_VERSION \
		var.PKG_MIRROR_HASH
)

case "$PKG_SOURCE_PROTO:$PKG_SOURCE_URL" in
	git:http://*|git:https://*|git:git://*|git:file:*)
		:
	;;
	*)
		echo "Unsupported combination of source protocol ('$PKG_SOURCE_PROTO') and url ('$PKG_SOURCE_URL')." >&2
		exit 1
	;;
esac

TEMP_GIT_DIR=

for signal in INT TERM EXIT; do
	trap '
		[ -d "$TEMP_GIT_DIR" ] && rm -rf "$TEMP_GIT_DIR";
		git -C "$(dirname "$MAKEFILE")" checkout --quiet "$(basename "$MAKEFILE")"
	' $signal
done

TEMP_GIT_DIR=$(mktemp -d) || {
	echo "Unable to create temporary Git directory." >&2
	exit 1
}

git clone --bare "$PKG_SOURCE_URL" "$TEMP_GIT_DIR" || {
	echo "Unable to clone Git repository '$PKG_SOURCE_URL'." >&2
	exit 1
}

GIT_LOG="$(git -C "$TEMP_GIT_DIR" log \
	--reverse --no-merges \
	--format="%h %s" \
	"$PKG_SOURCE_VERSION..$COMMIT" \
)" || {
	echo "Unable to determine changes from commit '$PKG_SOURCE_VERSION' to '$COMMIT'." >&2
	exit 1
}

GIT_DATE_COMMIT=$(git -C "$TEMP_GIT_DIR" log \
	-1 --format='%cd %H' \
	--date='format:%Y-%m-%d' \
	"$COMMIT" \
) || {
	echo "Unable to determine target commit ID and date." >&2
	exit 1
}

sed -i -r \
	-e "/PKG_SOURCE_VERSION/s#\<$PKG_SOURCE_VERSION\>#${GIT_DATE_COMMIT#* }#" \
	-e "/PKG_SOURCE_DATE/s#\<$PKG_SOURCE_DATE\>#${GIT_DATE_COMMIT% *}#" \
	"$MAKEFILE"

if [ -n "$PKG_RELEASE" ] && [ "$PKG_RELEASE" != "1" ]; then
	sed -i -r \
		-e "/PKG_RELEASE/s#\<$PKG_RELEASE\>#1#" \
		"$MAKEFILE"
fi

eval $(
	"$MAKE" --no-print-directory -C "$(dirname "$MAKEFILE")" \
		var.PKG_SOURCE
)

"$MAKE" -C "$(dirname "$MAKEFILE")" download || {
	echo "Unable to download and pack updated Git sources." >&2
	exit 1
}

DL_HASH=$(sha256sum "$TOPDIR/dl/$PKG_SOURCE") || {
	echo "Unable to determine archive checksum." >&2
	exit 1
}

sed -i -r \
	-e "/PKG_MIRROR_HASH/s#\<$PKG_MIRROR_HASH\>#${DL_HASH%% *}#" \
	"$MAKEFILE"

git -C "$(dirname "$MAKEFILE")" commit \
	--signoff --no-edit \
	--message "$PKG_NAME: update to Git $COMMIT (${GIT_DATE_COMMIT% *})" \
	--message "$GIT_LOG" \
	"$(basename "$MAKEFILE")"

"$MAKE" --no-print-directory -C "$(dirname "$MAKEFILE")" check || {
	echo "WARNING: Package check failed for updated Makefile!"
	exit 1
}

2. Usage example

jow@j7:~/devel/openwrt.git$ ./update-to-git-head.sh ucode
Cloning into bare repository '/tmp/tmp.ZCdTQSy6nm'...
remote: Enumerating objects: 4699, done.
remote: Counting objects: 100% (1329/1329), done.
remote: Compressing objects: 100% (388/388), done.
remote: Total 4699 (delta 947), reused 1247 (delta 923), pack-reused 3370
Receiving objects: 100% (4699/4699), 2.97 MiB | 15.46 MiB/s, done.
Resolving deltas: 100% (3052/3052), done.
gmake: Entering directory '/home/jow/devel/openwrt.git/package/utils/ucode'
mkdir -p /home/jow/devel/openwrt.git/dl
SHELL= flock /home/jow/devel/openwrt.git/tmp/.ucode-2023-11-07-a6e75e02.tar.xz.flock -c '  	/home/jow/devel/openwrt.git/scripts/download.pl "/home/jow/devel/openwrt.git/dl" "ucode-2023-11-07-a6e75e02.tar.xz" "f515a23ab438f92be5788c42b9f614a82e670de2df1c01cd63143cdc77fa24fe" "" || (  /home/jow/devel/openwrt.git/scripts/dl_github_archive.py --dl-dir="/home/jow/devel/openwrt.git/dl" --url="https://github.com/jow-/ucode.git" --version="a6e75e02528e36f3610a7f0073453018336def2e" --subdir="ucode-2023-11-07-a6e75e02" --source="ucode-2023-11-07-a6e75e02.tar.xz" --hash="f515a23ab438f92be5788c42b9f614a82e670de2df1c01cd63143cdc77fa24fe" --submodules  || ( 	echo "Checking out files from the git repository..."; mkdir -p /home/jow/devel/openwrt.git/tmp/dl && cd /home/jow/devel/openwrt.git/tmp/dl && rm -rf ucode-2023-11-07-a6e75e02 && [ \! -d ucode-2023-11-07-a6e75e02 ] && git clone  https://github.com/jow-/ucode.git ucode-2023-11-07-a6e75e02 && (cd ucode-2023-11-07-a6e75e02 && git checkout a6e75e02528e36f3610a7f0073453018336def2e && git submodule update --init --recursive -- ) && echo "Packing checkout..." && export TAR_TIMESTAMP=`cd ucode-2023-11-07-a6e75e02 && git log -1 --format='\''@%ct'\''` && rm -rf ucode-2023-11-07-a6e75e02/.git && 	tar --numeric-owner --owner=0 --group=0 --mode=a-s --sort=name ${TAR_TIMESTAMP:+--mtime="$TAR_TIMESTAMP"} -c ucode-2023-11-07-a6e75e02 | 	xz -zc -7e > /home/jow/devel/openwrt.git/tmp/dl/ucode-2023-11-07-a6e75e02.tar.xz && mv /home/jow/devel/openwrt.git/tmp/dl/ucode-2023-11-07-a6e75e02.tar.xz /home/jow/devel/openwrt.git/dl/ && rm -rf ucode-2023-11-07-a6e75e02; );  )    '
Hash of the local file ucode-2023-11-07-a6e75e02.tar.xz does not match (file: e1a0f98ba865ed5911d5db3bfca55a2f1b825992bf5f7c7e324928d9412d7ae2, requested: f515a23ab438f92be5788c42b9f614a82e670de2df1c01cd63143cdc77fa24fe) - deleting download.
ucode-2023-11-07-a6e75e02.tar.xz: Download from https://github.com/jow-/ucode.git failed
ucode-2023-11-07-a6e75e02.tar.xz: Wrong hash (probably caused by .gitattributes), expecting f515a23ab438f92be5788c42b9f614a82e670de2df1c01cd63143cdc77fa24fe, got e1a0f98ba865ed5911d5db3bfca55a2f1b825992bf5f7c7e324928d9412d7ae2
Checking out files from the git repository...
Cloning into 'ucode-2023-11-07-a6e75e02'...
remote: Enumerating objects: 4699, done.
remote: Counting objects: 100% (1329/1329), done.
remote: Compressing objects: 100% (388/388), done.
remote: Total 4699 (delta 947), reused 1247 (delta 923), pack-reused 3370
Receiving objects: 100% (4699/4699), 2.97 MiB | 10.18 MiB/s, done.
Resolving deltas: 100% (3052/3052), done.
Note: switching to 'a6e75e02528e36f3610a7f0073453018336def2e'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at a6e75e0 Merge pull request #180 from jow-/uloop-interval-signal-support
Packing checkout...
gmake: Leaving directory '/home/jow/devel/openwrt.git/package/utils/ucode'
[main c730d0f871] ucode: update to Git HEAD (2023-11-07)
 1 file changed, 3 insertions(+), 3 deletions(-)
jow@j7:~/devel/openwrt.git$ 

3. Resulting commit.patch

jow@j7:~/devel/openwrt.git$ git log -1 -p
commit c730d0f8710c8ff653efd2fd00fa71acceea643f (HEAD -> main)
Author: Jo-Philipp Wich <[email protected]>
Date:   Thu Nov 9 12:17:11 2023 +0100

    ucode: update to Git HEAD (2023-11-07)
    
    0352a33 uloop: support new interval and signal APIs
    1468cc4 syntax: don't treat `as` and `from` as reserved keywords
    
    Signed-off-by: Jo-Philipp Wich <[email protected]>

diff --git a/package/utils/ucode/Makefile b/package/utils/ucode/Makefile
index b62633492a..067e56e02d 100644
--- a/package/utils/ucode/Makefile
+++ b/package/utils/ucode/Makefile
@@ -12,9 +12,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=https://github.com/jow-/ucode.git
-PKG_SOURCE_DATE:=2023-11-02
-PKG_SOURCE_VERSION:=cfb24ea4f12131dcefe4f1ede2f51d3d16b88dec
-PKG_MIRROR_HASH:=f515a23ab438f92be5788c42b9f614a82e670de2df1c01cd63143cdc77fa24fe
+PKG_SOURCE_DATE:=2023-11-07
+PKG_SOURCE_VERSION:=a6e75e02528e36f3610a7f0073453018336def2e
+PKG_MIRROR_HASH:=e1a0f98ba865ed5911d5db3bfca55a2f1b825992bf5f7c7e324928d9412d7ae2
 PKG_MAINTAINER:=Jo-Philipp Wich <[email protected]>
 PKG_LICENSE:=ISC