Evergreen added shell script to create a git archive (#1718)

Ensure all submodules are included into the archive and dry up the logic

JAVA-5882

Author: rozza

.evergreen/.evg.yml

@@ -831,15 +831,7 @@ functions:
             set -o errexit
             ${PREPARE_SHELL}
             export K8S_VARIANT=${VARIANT}
-            cd src
-            git add .
-            git commit --allow-empty -m "add files"
-            # uncompressed tar used to allow appending .git folder
-            export K8S_DRIVERS_TAR_FILE=/tmp/mongo-java-driver.tar
-            git archive -o $K8S_DRIVERS_TAR_FILE HEAD
-            tar -rf $K8S_DRIVERS_TAR_FILE .git
-            # Loop through all submodule directories and append to the archive
-            git submodule status --recursive | awk '{ print $2 }' | xargs tar -rf "$K8S_DRIVERS_TAR_FILE"
+            export K8S_DRIVERS_TAR_FILE=$(./.evergreen/git-archive.sh)
             export K8S_TEST_CMD="OIDC_ENV=k8s VARIANT=${VARIANT} ./.evergreen/run-mongodb-oidc-test.sh"
             bash $DRIVERS_TOOLS/.evergreen/auth_oidc/k8s/setup-pod.sh
             bash $DRIVERS_TOOLS/.evergreen/auth_oidc/k8s/run-self-test.sh
@@ -939,13 +931,7 @@ tasks:
             script: |-
               set -o errexit
               ${PREPARE_SHELL}
-              cd src
-              git add .
-              git commit --allow-empty -m "add files"
-              # uncompressed tar used to allow appending .git folder
-              export AZUREOIDC_DRIVERS_TAR_FILE=/tmp/mongo-java-driver.tar
-              git archive -o $AZUREOIDC_DRIVERS_TAR_FILE HEAD
-              tar -rf $AZUREOIDC_DRIVERS_TAR_FILE .git
+              export AZUREOIDC_DRIVERS_TAR_FILE=$(./.evergreen/git-archive.sh)
               export AZUREOIDC_TEST_CMD="OIDC_ENV=azure ./.evergreen/run-mongodb-oidc-test.sh"
               bash $DRIVERS_TOOLS/.evergreen/auth_oidc/azure/run-driver-test.sh
 
@@ -957,13 +943,7 @@ tasks:
             script: |-
               set -o errexit
               ${PREPARE_SHELL}
-              cd src
-              git add .
-              git commit --allow-empty -m "add files"
-              # uncompressed tar used to allow appending .git folder
-              export GCPOIDC_DRIVERS_TAR_FILE=/tmp/mongo-java-driver.tar
-              git archive -o $GCPOIDC_DRIVERS_TAR_FILE HEAD
-              tar -rf $GCPOIDC_DRIVERS_TAR_FILE .git
+              export GCPOIDC_DRIVERS_TAR_FILE=$(./.evergreen/git-archive.sh)
               # Define the command to run on the VM.
               # Ensure that we source the environment file created for us, set up any other variables we need,
               # and then run our test suite on the vm.

.evergreen/git-archive.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# Exit the script with error if any of the commands fail
+set -o errexit
+
+# Returns the path to the root archive file which includes all git submodules.
+
+echo "Creating root archive"
+export GIT_ARCHIVE_FILE="/tmp/mongo-java-driver.tar"
+
+# create root archive
+git archive --output $GIT_ARCHIVE_FILE HEAD
+
+echo "Appending submodule archives"
+git submodule status --recursive | awk '{ print $2 }' | xargs tar -rf $GIT_ARCHIVE_FILE
+
+echo "Appending .git directory to the root archive"
+tar -rf $GIT_ARCHIVE_FILE .git
+
+echo "$GIT_ARCHIVE_FILE"