chore: make scripts work on Alpine & fix Shell Feature

Signed-off-by: Georg Lauterbach <44545919+georglauterbach@users.noreply.github.com>

Author: georglauterbach

README.md

@@ -1,3 +1,5 @@
 # Development Container Features
 
 My personal collection of [Development Container Features](https://containers.dev/implementors/features/).
+
+The Features work on Alpine and other distributions.

src/hermes/install.sh

@@ -16,9 +16,9 @@ main() {
   parse_dev_container_options
   echo "Add '[[ -f ${HOME}/.config/bash/90-hermes.sh ]] && source \"${HOME}/.config/bash/90-hermes.sh\"' to your Bash setup to enable hermes"
 
-  mkdir --parents /usr/local/bin/
+  mkdir -p                                                  /usr/local/bin/
   mv "hermes-v11.2.3-$(uname --machine)-unknown-linux-musl" /usr/local/bin/hermes
-  chmod +x /usr/local/bin/hermes
+  chmod +x                                                  /usr/local/bin/hermes
 }
 
 main "${@}"

src/lang-rust/install.sh

@@ -31,7 +31,7 @@ rustup_adjustments() {
 
   if [ "${GENERATE_SHELL_COMPLETIONS}" = 'true' ]; then
     log 'info' 'Generating completions for rustup and Cargo'
-    mkdir  --parents               /usr/share/bash-completion/completions
+    mkdir  -p                      /usr/share/bash-completion/completions
     rustup completions bash       >/usr/share/bash-completion/completions/rustup
     rustup completions bash cargo >/usr/share/bash-completion/completions/cargo
   else
@@ -55,7 +55,7 @@ copy_lldb_prettifiers() {
 main() {
   parse_dev_container_options
 
-  mkdir --parents "${FEATURE_SHARE_DIR}"
+  mkdir -p "${FEATURE_SHARE_DIR}"
 
   copy_lifecycle_hook_scripts
   rustup_adjustments

src/lang-sh/devcontainer-feature.json

@@ -5,13 +5,11 @@
   "version": "0.2.3",
   "name": "Programming Language | Bash",
   "documentationURL": "https://github.com/georglauterbach/dev-container-features/tree/main/src/lang-sh",
-  "description": "Work efficiently and effortlessly with Bash",
-  "options": {
-    "copy-libbash": {
-      "description": "whether to copy [`libbash`](https://github.com/georglauterbach/libbash) v9.0.0 to `/usr/local/lib/`",
-      "type": "boolean",
-      "default": true
-    }
+  "description": "Work efficiently and effortlessly with shell scripts",
+  "containerEnv": {
+    // can be used to easily source 'libbash' by running
+    // 'source "${DEV_CONTAINER_FEATURE_LANG_SH_SHARED_DIR}/libbash" [<LIBBASH ARGUMENTS>...]'
+    "DEV_CONTAINER_FEATURE_LANG_SH_SHARED_DIR": "/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/lang_bash"
   },
   "customizations": {
     "vscode": {

src/lang-sh/install.sh

@@ -2,25 +2,12 @@
 
 set -e -u
 
-FEATURE_SHARE_DIR=/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/lang_bash
-readonly FEATURE_SHARE_DIR
-
-parse_dev_container_options() {
-  log 'info' 'Parsing input from options'
-
-  readonly COPY_LIBBASH="${COPY_LIBBASH:?COPY_LIBBASH not set or null}"
-}
+FEATURE_SHARED_DIR=/usr/local/share/dev_containers/features/ghcr_io/georglauterbach/lang_bash
+readonly FEATURE_SHARED_DIR
 
 main() {
-  parse_dev_container_options
-
-  cp shellcheck.conf "${FEATURE_SHARE_DIR}"
-  cp libbash "${FEATURE_SHARE_DIR}"
-
-  if "${COPY_LIBBASH}"; then
-    mkdir --parents /usr/local/lib
-    cp libbash /usr/local/lib/
-  fi
-
-  return 0
+  cp shellcheck.conf "${FEATURE_SHARED_DIR}"
+  cp libbash         "${FEATURE_SHARED_DIR}"
 }
+
+main