[common-utils] fix bug when user home is custom by base docker (#703)

* [common-utils] fix bug when user home is custom by base docker

* bumped minor version

* reduced conditions to improve readability

src/common-utils/devcontainer-feature.json

 {
     "id": "common-utils",
-    "version": "2.1.3",
+    "version": "2.2.0",
     "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 +407,9 @@ fi
 
 if [ "${USERNAME}" = "root" ]; then
     user_home="/root"
+# Check if user already has a home directory other than /home/${USERNAME}
+elif [ "/home/${USERNAME}" != $( getent passwd $USERNAME | cut -d: -f6 ) ]; then
+    user_home=$( getent passwd $USERNAME | cut -d: -f6 )
 else
     user_home="/home/${USERNAME}"
     if [ ! -d "${user_home}" ]; then

test/common-utils/devcontainer-custom-home.sh

+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+# Definition specific tests
+check "user is customUser" grep customUser <(whoami)
+check "home is /customHome" grep "/customHome" <(getent passwd customUser | cut -d: -f6) 
+
+# Report result
+reportResults

test/common-utils/devcontainer-custom-home/Dockerfile

+FROM ubuntu:focal
+
+RUN groupadd customUser -g 30000 && \
+    useradd customUser -u 30000 -g 30000 --create-home --home-dir /customHome

test/common-utils/devcontainer-custom-user-default-home.sh

+#!/bin/bash
+
+set -e
+
+# Optional: Import test library
+source dev-container-features-test-lib
+
+# Definition specific tests
+check "user is customUser" grep customUser <(whoami)
+check "home is /home/customUser" grep "/home/customUser" <(getent passwd customUser | cut -d: -f6) 
+
+# Report result
+reportResults

test/common-utils/scenarios.json

@@ -183,5 +183,21 @@
                 "configureZshAsDefaultShell": true
             }
         }
+    },
+    "devcontainer-custom-home": {
+        "build": {
+            "dockerfile": "Dockerfile"
+        },
+        "remoteUser": "customUser",
+        "features": {
+            "common-utils": {}
+        }
+    },
+    "devcontainer-custom-user-default-home": {
+        "image": "mcr.microsoft.com/devcontainers/base:alpine",
+        "remoteUser": "customUser",
+        "features": {
+            "common-utils": {}
+        }
     }
 }