home: direnv: add 'android' library file

modules/home/direnv/lib/android.sh

@@ -0,0 +1,58 @@
+#shellcheck shell=bash
+
+# shellcheck disable=2155
+use_android() {
+    if [ -z "$ANDROID_HOME" ]; then
+        log_error "use_android: 'ANDROID_HOME' is not defined"
+        return 1
+    fi
+
+    _use_android_find_latest() {
+        local path="$1"
+        local version
+
+        version="$(semver_search "$path" "" "")"
+        if [ -z "$version" ]; then
+            log_error "use_android: did not find any version at '$path'"
+            return 1
+        fi
+
+        printf '%s' "$version"
+    }
+
+    # Default to the latest version found
+    local ndk_version="$(_use_android_find_latest "$ANDROID_HOME/ndk" || return 1)"
+    local build_tools_version="$(_use_android_find_latest "$ANDROID_SDK_HOME/build-tools" || return 1)"
+
+    unset -f _use_android_find_latest
+
+    # Allow changing the default version through a command line switch
+    while true; do
+        case "$1" in
+            -b|--build-tools)
+                build_tools_version="$2"
+                shift 2
+                ;;
+            -n|--ndk)
+                ndk_version="$2"
+                shift 2
+                ;;
+            --)
+                shift
+                break
+                ;;
+            *)
+                break
+                ;;
+        esac
+    done
+
+    export ANDROID_SDK_HOME="$ANDROID_HOME"
+    export ANDROID_NDK_HOME="$ANDROID_HOME/ndk/$ndk_version"
+    export ANDROID_ROOT="$ANDROID_HOME"
+    export ANDROID_SDK_ROOT="$ANDROID_SDK_HOME"
+    export ANDROID_NDK_ROOT="$ANDROID_NDK_HOME"
+
+    PATH_add "$ANDROID_NDK_HOME"
+    PATH_add "$ANDROID_SDK_HOME/build-tools/$build_tools_version"
+}