Added update-alternatives fix for all packages that rely on it.

новый файл: 01-alternatives.sh новый файл: darkline-postinst.install изменено: PKGBUILD
2025-08-21 21:47:16 +03:00
parent e3a622c05c
commit 6c48edaed3
2 changed files with 136 additions and 0 deletions
--- a/01-alternatives.sh
+++ b/01-alternatives.sh
@@ -0,0 +1,126 @@
+#!/data/data/com.termux/files/usr/bin/bash
+# shellcheck shell=bash
+
+export TERMUX_PREFIX="/data/data/com.termux/files/usr"
+export TERMUX_PACKAGE_MANAGER="pacman"
+export TERMUX_PACKAGE_ARCH="aarch64"
+
+TERMUX__USER_ID___N="TERMUX__USER_ID"
+TERMUX__USER_ID="${!TERMUX__USER_ID___N:-}"
+
+function log() { echo "[*]" "$@"; }
+function log_error() { echo "[*]" "$@" 1>&2; }
+run_package_postinst_maintainer_scripts() {
+
+	local return_value
+
+	local package_name
+	local package_version
+	local package_dir
+	local package_dir_basename
+	local script_path
+	local script_basename
+
+	if [ ${TERMUX_PACKAGE_MANAGER} = "pacman" ]; then
+		# - https://wiki.archlinux.org/title/PKGBUILD#install
+		# - https://gitlab.archlinux.org/pacman/pacman/-/blob/v6.1.0/lib/libalpm/add.c#L638-L647
+		if [ -d "${TERMUX_PREFIX}/var/lib/pacman/local" ]; then
+			# Package install files exist at `/var/lib/pacman/local/package-version/install`
+			for script_path in "${TERMUX_PREFIX}/var/lib/pacman/local/"*/install; do
+				package_dir="${script_path::-8}"
+				package_dir_basename="${package_dir##*/}"
+
+				# Extract package `version` in the format `epoch:pkgver-pkgrel`
+				# from the package_dir_basename in the format `package-version`.
+				# Do not use external programs to parse as that would require
+				# adding it as a dependency for second-stage.
+				# - https://wiki.archlinux.org/title/PKGBUILD#Version
+				# Set to anything after last dash "-"
+				local package_version_pkgrel="${package_dir_basename##*-}"
+				# Set to anything before and including last dash "-"
+				local package_name_and_version_pkgver="${package_dir_basename%"$package_version_pkgrel"}"
+				# Trim trailing dash "-"
+				package_name_and_version_pkgver="${package_name_and_version_pkgver%?}"
+				# Set to anything after last dash "-"
+				local package_version_pkgver="${package_name_and_version_pkgver##*-}"
+				# Combine pkgver and pkgrel
+				package_version="$package_version_pkgver-$package_version_pkgrel"
+				if [[ ! "$package_version" =~ ^([0-9]+:)?[^-]+-[^-]+$ ]]; then
+					log_error "The package_version '$package_version' extracted from package_dir_basename '$package_dir_basename' is not valid"
+					return 1
+				fi
+				if grep -q update-alternatives "$script_path"; then			
+					log "Running '$package_dir_basename' package post_install"
+
+					(
+						# As per `pacman` install docs:
+						# > Each function is run chrooted inside the pacman install directory. See this thread.
+						# The `RootDir` is chrooted into and then the
+						# current working directory is changed to `/`.
+						# - https://bbs.archlinux.org/viewtopic.php?pid=913891
+						# - https://man.archlinux.org/man/pacman.conf.5.en#OPTIONS
+						# - https://gitlab.archlinux.org/pacman/pacman/-/blob/v6.1.0/src/pacman/conf.c#L855
+						# - https://gitlab.archlinux.org/pacman/pacman/-/blob/v6.1.0/lib/libalpm/alpm.c#L47
+						# - https://gitlab.archlinux.org/pacman/pacman/-/blob/v6.1.0/lib/libalpm/alpm.h#L1663-L1676
+						# - https://gitlab.archlinux.org/pacman/pacman/-/blob/v6.1.0/lib/libalpm/util.c#L657-L668
+						# - https://man7.org/linux/man-pages/man2/chroot.2.html
+						# But since Android apps cannot run chroot
+						# without root access, chroot is disabled by
+						# Termux pacman package and only current working
+						# directory is changed to the Android rootfs `/`.
+						# Note that Termux rootfs is under private app
+						# data directory `/data/data/<package_name>,`
+						# which may cause problems for packages which try
+						# to use Android rootfs paths instead of Termux
+						# rootfs paths.
+						# - https://github.com/termux/termux-packages/blob/953b9f2aac0dc94f3b99b2df6af898e0a95d5460/packages/pacman/util.c.patch
+						cd "/" || exit $?
+
+						# Source the package `install` file and execute
+						# `post_install` function if defined.
+
+						# Unset function if already defined in the env
+						unset -f post_install || exit $?
+
+						# shellcheck disable=SC1090
+						source "$script_path"
+						return_value=$?
+						if [ $return_value -ne 0 ]; then
+							log_error "Failed to source '$package_dir_basename' package install install"
+							exit $return_value
+						fi
+
+						if [[ "$(type -t post_install 2>/dev/null)" == "function" ]]; then
+							# cd again in case install file sourced changed the directory.
+							cd "/" || exit $?
+
+							# Execute the post_install function and exit
+							# with failure if it fails as that implies
+							# that bootstrap setup failed.
+							# The package version is the first argument.
+							# Check `PKGBUILD#install` docs for more info.
+							post_install "$package_version"
+							return_value=$?
+							if [ $return_value -ne 0 ]; then
+								log_error "Failed to run '$package_dir_basename' package post_install"
+								exit $return_value
+							fi
+						fi
+						) || return $?
+				fi
+			done
+		fi
+	fi
+
+	return 0
+	
+}
+
+if [ ! -f "/data/data/com.termux/files/usr/etc/.darkcustom/uafix.lock" ]; then
+	echo "fixing broken packages after update-alternatives mayhem..."
+	touch /data/data/com.termux/files/usr/etc/.darkcustom/uafix.lock
+    run_package_postinst_maintainer_scripts
+
+else
+	echo "update-alternatives fix already installed, doing nothing."
+fi
--- a/darkline-postinst.install
+++ b/darkline-postinst.install
@@ -0,0 +1,10 @@
+post_install() {
+	echo "Running all afterthought fixes..."
+    for f in /data/data/com.termux/usr/etc/.darkcustom/fixes/*.sh; do
+        bash "$f"
+    done
+
+}
+post_upgrade() {
+	post_install
+}