Merge pull request #97 from groovy/handle-other-grapes-cache-directories

Handle different Grapes cache directory

test/grape.groovy

@@ -1,8 +1,46 @@
-@Grab(group='org.apache.commons', module='commons-lang3', version='3.7')
-import org.apache.commons.lang3.StringUtils
+@Grab(group='org.apache.commons', module='commons-lang3', version='3.13.0')
+import org.apache.commons.lang3.*
 
-if (new File('/home/groovy/.groovy/grapes').listFiles().size() == 0) {
-    System.exit 1
-} else {
-    System.exit 0
+File getGroovyRoot() {
+    String root = System.getProperty('groovy.root')
+    def groovyRoot
+    if (root == null) {
+        groovyRoot = new File(System.getProperty('user.home'), '.groovy')
+    } else {
+        groovyRoot = new File(root)
+    }
+    try {
+        groovyRoot = groovyRoot.getCanonicalFile()
+    } catch (IOException ignore) {
+        // skip canonicalization then, it may not exist yet
+    }
+    groovyRoot
+}
+
+File getGrapeDir() {
+    String root = System.getProperty('grape.root')
+    if (root == null) {
+        return getGroovyRoot()
+    }
+    File grapeRoot = new File(root)
+    try {
+        grapeRoot = grapeRoot.getCanonicalFile()
+    } catch (IOException ignore) {
+        // skip canonicalization then, it may not exist yet
+    }
+    grapeRoot
+}
+
+File getGrapeCacheDir() {
+    File cache = new File(getGrapeDir(), 'grapes')
+    if (!cache.exists()) {
+        cache.mkdirs()
+    } else if (!cache.isDirectory()) {
+        throw new RuntimeException("The grape cache dir $cache is not a directory")
+    }
+    cache
+}
+
+if (getGrapeCacheDir().listFiles().size() == 0) {
+    throw new RuntimeException('No Grapes files')
 }