Fix for #146 : Now using SHA of commit in native git in case Repro is in detached HEAD-State and not in a CI-Environment, thats the same behavoir as in JGit-Implementation

Author: Stefan Lange

src/main/java/pl/project13/maven/git/NativeGitProvider.java

@@ -73,9 +73,15 @@ protected String getBranchName() throws IOException {
   }
 
   private String getBranch(File canonical) {
-    String branch = tryToRunGitCommand(canonical, "symbolic-ref HEAD");
-    if (branch != null) {
-      branch = branch.replace("refs/heads/", "");
+    String branch = null;
+    try{
+      branch = tryToRunGitCommand(canonical, "symbolic-ref HEAD");
+      if (branch != null) {
+        branch = branch.replace("refs/heads/", "");
+      }
+    }catch(RuntimeException e){
+      // it seems that git repro is in 'DETACHED HEAD'-State, using Commid-Id as Branch
+      branch = getCommitId();
     }
     return branch;
   }

src/test/java/pl/project13/maven/git/GitCommitIdMojoIntegrationTest.java

@@ -621,11 +621,6 @@ public void shouldExtractTagsOnGivenCommit(boolean useNativeGit) throws Exceptio
   @Test
   @Parameters(method = "useNativeGit")
   public void runGitDescribeWithMatchOption(boolean useNativeGit) throws Exception {
-    if (System.getenv().get("TRAVIS").equals("true") && System.getenv().get("CI").equals("true")) {
-      // FIXME: this test has trouble on travis, I think it's because of not pulling everything?
-      return;
-    }
-
     // given
     mavenSandbox.withParentProject("my-pom-project", "pom")
                 .withChildProject("my-jar-module", "jar")