Fix asdf home

src/elixir-asdf/install.sh

@@ -1,24 +1,144 @@
 #!/usr/bin/env bash
+# This is part of devcontainers-extra script library
+# source: https://github.com/devcontainers-extra/features
 
-set -e
+set -ex
 
-source ./library_scripts.sh
+VERSION=${VERSION:-"latest"}
 
-# nanolayer is a cli utility which keeps container layers as small as possible
-# source code: https://github.com/devcontainers-extra/nanolayer
-# `ensure_nanolayer` is a bash function that will find any existing nanolayer installations,
-# and if missing - will download a temporary copy that automatically get deleted at the end
-# of the script
-ensure_nanolayer nanolayer_location "v0.4.45"
+# Clean up
+rm -rf /var/lib/apt/lists/*
 
+if [ "$(id -u)" -ne 0 ]; then
+	echo -e 'Script must be run as
+    root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
+	exit 1
+fi
 
-$nanolayer_location \
-    install \
-    devcontainer-feature \
-    "ghcr.io/devcontainers-extra/features/asdf-package:1.0.8" \
-    --option plugin='elixir' --option version="$VERSION"
+check_alpine_packages() {
+    apk add -v --no-cache "$@"
+}
 
+check_packages() {
+	if ! dpkg -s "$@" >/dev/null 2>&1; then
+		if [ "$(find /var/lib/apt/lists/* | wc -l)" = "0" ]; then
+			echo "Running apt-get update..."
+			apt-get update -y
+		fi
+		apt-get -y install --no-install-recommends "$@"
+	fi
+}
 
+updaterc() {
+	if cat /etc/os-release | grep "ID_LIKE=.*alpine.*\|ID=.*alpine.*" ; then
+		echo "Updating /etc/profile"
+		echo -e "$1" >>/etc/profile
+	fi
+	if [[ "$(cat /etc/bash.bashrc)" != *"$1"* ]]; then
+		echo "Updating /etc/bash.bashrc"
+		echo -e "$1" >>/etc/bash.bashrc
+	fi
+	if [ -f "/etc/zsh/zshrc" ] && [[ "$(cat /etc/zsh/zshrc)" != *"$1"* ]]; then
+		echo "Updating /etc/zsh/zshrc"
+		echo -e "$1" >>/etc/zsh/zshrc
+	fi
+}
 
-echo 'Done!'
+install_via_asdf() {
+	PLUGIN=$1
+	VERSION=$2
+	REPO=$3
 
+	# install git and curl if does not exists
+	if cat /etc/os-release | grep "ID_LIKE=.*alpine.*\|ID=.*alpine.*" ; then
+        check_alpine_packages curl git ca-certificates
+	elif cat /etc/os-release | grep  "ID_LIKE=.*debian.*\|ID=.*debian.*"; then
+		check_packages curl git ca-certificates
+	fi
+
+
+	# asdf may be installed somewhere on the machine, but we need it to be accessible to the remote user
+	# the code bellow will return 2 only when asdf is available, and 1 otherwise
+	set +e
+	su "$_REMOTE_USER" <<EOF
+		export HOME="$_REMOTE_USER_HOME"
+		export PATH="\$HOME/.asdf/bin:\$HOME/.asdf/shims:\$PATH"
+
+		if type asdf >/dev/null 2>&1; then
+			exit 2
+		fi
+		exit 1
+EOF
+	exit_code=$?
+	set -e
+
+	if [ "${exit_code}" -eq 2 ]; then
+		# asdf already available to remote user, use it
+		su "$_REMOTE_USER" <<EOF
+			export HOME="$_REMOTE_USER_HOME"
+			. "\$HOME/.asdf/asdf.sh"
+
+			if asdf list "$PLUGIN" >/dev/null 2>&1; then
+				echo "$PLUGIN already exists - skipping adding it"
+			else
+				asdf plugin add "$PLUGIN" "$REPO"
+			fi
+
+ 			if [ "${VERSION}" = "latest" ] ; then
+				resolved_version=\$(asdf latest "$PLUGIN" "$LATESTVERSIONPATTERN")
+			else
+				resolved_version=$VERSION
+			fi
+
+			asdf install "$PLUGIN" "\$resolved_version"
+			asdf global "$PLUGIN" "\$resolved_version"
+EOF
+	else
+		# asdf is not available to remote user, install it, then update rc files
+
+		su "$_REMOTE_USER" <<EOF
+			export HOME="$_REMOTE_USER_HOME"
+
+			git clone --depth=1 \
+					-c core.eol=lf \
+					-c core.autocrlf=false \
+					-c fsck.zeroPaddedFilemode=ignore \
+					-c fetch.fsck.zeroPaddedFilemode=ignore \
+					-c receive.fsck.zeroPaddedFilemode=ignore \
+					"https://github.com/asdf-vm/asdf.git" --branch v0.12.0 "\$HOME/.asdf" 2>&1
+
+			. "\$HOME/.asdf/asdf.sh"
+			if asdf list "$PLUGIN" >/dev/null 2>&1; then
+				echo "$PLUGIN already exists - skipping adding it"
+			else
+				asdf plugin add "$PLUGIN" "$REPO"
+			fi
+EOF
+
+
+		# I resolve the version like this because in bash resolving
+		# a subshell take prevedent to su, so we must resolve variables
+		# pre using them in final su clause.
+		# I hate bash.
+		resolved_version=$(su "$_REMOTE_USER" <<EOF
+			export HOME="$_REMOTE_USER_HOME"
+			. "\$HOME/.asdf/asdf.sh" > /dev/null 2>&1
+
+			if [ "${VERSION}" = "latest" ] ; then
+				asdf latest "$PLUGIN" "$LATESTVERSIONPATTERN"
+			else
+				echo $VERSION
+			fi
+EOF
+)
+		su "$_REMOTE_USER" <<EOF
+			export HOME="$_REMOTE_USER_HOME"
+			. "\$HOME/.asdf/asdf.sh"
+			asdf install "$PLUGIN" "$resolved_version"
+			asdf global "$PLUGIN" "$resolved_version"
+EOF
+		updaterc ". $_REMOTE_USER_HOME/.asdf/asdf.sh"
+	fi
+}
+
+install_via_asdf elixir "$VERSION" "https://github.com/asdf-vm/asdf-elixir.git"