chore(shared-pnpm-store): apply bash best practices across scripts

src/shared-pnpm-store/install.sh

@@ -1,24 +1,24 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
-set -e
+set -euo pipefail
 
-USERNAME=${USERNAME:-${_REMOTE_USER}}
+USERNAME=${USERNAME:-${_REMOTE_USER:-}}
 FEATURE_ID="shared-pnpm-store"
 STORE_DIR="/mnt/shared-pnpm-store"
 LIFECYCLE_SCRIPTS_DIR="/usr/local/share/${FEATURE_ID}/scripts"
 
 echo "Ensuring pnpm store directory ${STORE_DIR} exists..."
 mkdir -p "${STORE_DIR}"
 
-if [ -n "${USERNAME}" ] && [ "${USERNAME}" != "root" ]; then
+if [[ -n "${USERNAME}" && "${USERNAME}" != "root" ]]; then
     echo "Setting owner of ${STORE_DIR} to ${USERNAME}..."
     chown -R "${USERNAME}:${USERNAME}" "${STORE_DIR}"
 else
     echo "No non-root user; leaving ${STORE_DIR} owned by root."
 fi
 
 # Install lifecycle script (re-asserts ownership at container create time)
-if [ -f oncreate.sh ]; then
+if [[ -f oncreate.sh ]]; then
     echo "Installing oncreate.sh to ${LIFECYCLE_SCRIPTS_DIR}..."
     mkdir -p "${LIFECYCLE_SCRIPTS_DIR}"
     cp oncreate.sh "${LIFECYCLE_SCRIPTS_DIR}/oncreate.sh"

src/shared-pnpm-store/oncreate.sh

@@ -1,6 +1,6 @@
-#!/bin/sh
+#!/usr/bin/env bash
 
-set -e
+set -euo pipefail
 
 STORE_DIR="/mnt/shared-pnpm-store"
 
@@ -9,7 +9,7 @@ STORE_DIR="/mnt/shared-pnpm-store"
 # ownership for the current non-root user on every container create so pnpm can
 # always write to the store, even if the volume was first created by root or a
 # different user.
-if [ "$(id -u)" != "0" ]; then
+if [[ "$(id -u)" != "0" ]]; then
     USERNAME="$(id -un)"
     echo "Setting owner of ${STORE_DIR} to ${USERNAME}..."
     sudo chown -R "${USERNAME}:${USERNAME}" "${STORE_DIR}"

test/shared-pnpm-store/_default.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 # Default assertions, reused by scenarios that have pnpm installed.
 # Not run directly as a scenario.

test/shared-pnpm-store/fish_shell.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 # fish feature installed alongside
 ./_default.sh

test/shared-pnpm-store/node_v2.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 # node feature v2 installs latest pnpm by default; this feature touches no
 # pnpm global state, so the default assertions are sufficient.

test/shared-pnpm-store/pnpm_from_feature.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 # pnpm installed via the node feature
 ./_default.sh

test/shared-pnpm-store/root_user.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 source dev-container-features-test-lib
 

test/shared-pnpm-store/test.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 # Optional: Import test library
 source dev-container-features-test-lib

test/shared-pnpm-store/with_node.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 # pnpm already present in the base image
 ./_default.sh

test/shared-pnpm-store/zsh_shell.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 # zsh configured as default shell
 ./_default.sh