From 654b3aa58d7ce59c799a89c0fd122ea998f57f0d Mon Sep 17 00:00:00 2001
From: Alexander Fenster <fenster@google.com>
Date: Wed, 20 Nov 2019 16:11:29 -0800
Subject: [PATCH] feat: show latest commit when running docker image (#154)

---
 .gitignore        | 1 +
 docker/Dockerfile | 3 +++
 docker/build.sh   | 4 ++++
 docker/start.sh   | 6 ++++++
 4 files changed, 14 insertions(+)

diff --git a/.gitignore b/.gitignore
index 23f22daf0..a647892fa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,7 @@ pbjs-genfiles/
 .client_library
 *test-out*
 docker/package.tgz
+docker/gitlog.txt
 *.tgz
 .showcase-typescript
 .test-application-js
diff --git a/docker/Dockerfile b/docker/Dockerfile
index f3f1e8179..b97043ca9 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -33,4 +33,7 @@ RUN rm -rf /root/files
 RUN gapic-generator-typescript --version
 RUN protoc --version
 
+# Save git log output for debugging purposes
+COPY ./gitlog.txt /root/
+
 ENTRYPOINT [ "/usr/local/bin/start.sh" ]
diff --git a/docker/build.sh b/docker/build.sh
index c35069cb0..00227fef8 100644
--- a/docker/build.sh
+++ b/docker/build.sh
@@ -19,6 +19,7 @@
 SCRIPTDIR=`dirname "$0"`
 cd "$SCRIPTDIR"
 cd ..   # now in the package.json directory
+git log | head -n 3 > docker/gitlog.txt
 npm pack
 
 VERSION=`cat package.json | grep version | awk -F'"' '{ print $4; }'`
@@ -27,3 +28,6 @@ cp "google-cloud-gapic-generator-$VERSION.tgz" "docker/package.tgz"
 cd docker
 
 docker build -t gapic-generator-typescript .
+
+# Cleanup
+rm -f gitlog.txt package.tgz
diff --git a/docker/start.sh b/docker/start.sh
index 2db4bb9fc..6986b69d1 100644
--- a/docker/start.sh
+++ b/docker/start.sh
@@ -2,6 +2,12 @@
 
 ### Start script that is an entry point for a Docker image.
 
+# Dump the version of the current code to stderr
+echo "gapic-generator-typescript: https://github.com/googleapis/gapic-generator-typescript" 1>&2
+echo "Latest commit: " 1>&2
+cat /root/gitlog.txt 1>&2
+echo 1>&2
+
 # Change directory to the input directory. 
 # Make it easier to pass gRPC service config relative to it, e.g.
 # --grpc-service-config google/cloud/texttospeech/v1/texttospeech_grpc_service_config.json