Common-utils: Fix build failures for alpine 3.14 & 3.15 (#393)

* Common-utils: Fix build failures for alpine 3.14 & 3.15

* version bump

src/common-utils/devcontainer-feature.json

 {
     "id": "common-utils",
-    "version": "2.0.5",
+    "version": "2.0.6",
     "name": "Common Utilities",
     "documentationURL": "https://github.com/devcontainers/features/tree/main/src/common-utils",
     "description": "Installs a set of common command line utilities, Oh My Zsh!, and sets up a non-root user.",

src/common-utils/main.sh

@@ -407,6 +407,8 @@ if [ "${RC_SNIPPET_ALREADY_ADDED}" != "true" ]; then
             ;;
         "alpine")
             global_rc_path="/etc/bash/bashrc"
+            # /etc/bash/bashrc does not exist in alpine 3.14 & 3.15
+            mkdir -p /etc/bash
             ;;
     esac
     cat "${FEATURE_DIR}/scripts/rc_snippet.sh" >> ${global_rc_path}

test/common-utils/alpine-3-14.sh

+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+# Definition specific tests
+. /etc/os-release
+check "non-root user" test "$(whoami)" = "devcontainer"
+check "distro" test "${ID}" = "alpine"
+check "bashrc" ls /etc/bash/bashrc
+
+# Report result
+reportResults
\ No newline at end of file

test/common-utils/alpine-3-15.sh

+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+# Definition specific tests
+. /etc/os-release
+check "non-root user" test "$(whoami)" = "devcontainer"
+check "distro" test "${ID}" = "alpine"
+check "bashrc" ls /etc/bash/bashrc
+
+# Report result
+reportResults
\ No newline at end of file

test/common-utils/scenarios.json

@@ -115,6 +115,20 @@
             }
         }
     },
+    "alpine-3-14": {
+        "image": "alpine:3.14",
+        "remoteUser": "devcontainer",
+        "features": {
+            "common-utils": {}
+        }
+    },
+    "alpine-3-15": {
+        "image": "alpine:3.15",
+        "remoteUser": "devcontainer",
+        "features": {
+            "common-utils": {}
+        }
+    },
     "devcontainer-info": {
         "build": {
             "dockerfile": "Dockerfile"