From a3f2317ac88fddc15e6b09d1f9e362a530ea1b6b Mon Sep 17 00:00:00 2001
From: Ryan Ernst <ryan@iernst.net>
Date: Thu, 16 Jan 2020 10:10:31 -0800
Subject: [PATCH] Fix git info within VM for worktrees

If a worktree is used, say for 7.x, and packaging tests are run, the
build within the VM will fail due to the parent checkout not being
accessible. This is because the path of the worktree is for the host
systtem, not the VM. This commit makes the git info unknown, just as if
the .git directory did not exist.
---
 .../org/elasticsearch/gradle/info/GlobalBuildInfoPlugin.java   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/buildSrc/src/main/java/org/elasticsearch/gradle/info/GlobalBuildInfoPlugin.java b/buildSrc/src/main/java/org/elasticsearch/gradle/info/GlobalBuildInfoPlugin.java
index dbe13916a2858..e014d2e04108d 100644
--- a/buildSrc/src/main/java/org/elasticsearch/gradle/info/GlobalBuildInfoPlugin.java
+++ b/buildSrc/src/main/java/org/elasticsearch/gradle/info/GlobalBuildInfoPlugin.java
@@ -263,6 +263,9 @@ public static String gitRevision(File rootDir) {
             } else {
                 // this is a git worktree, follow the pointer to the repository
                 final Path workTree = Paths.get(readFirstLine(dotGit).substring("gitdir:".length()).trim());
+                if (Files.exists(workTree) == false) {
+                    return "unknown";
+                }
                 head = workTree.resolve("HEAD");
                 final Path commonDir = Paths.get(readFirstLine(workTree.resolve("commondir")));
                 if (commonDir.isAbsolute()) {