use dart base image

.travis.yml

@@ -1,7 +1,7 @@
 language: dart
 dist: precise
 dart:
-  - stable
+  - 1.24.3
 addons:
   apt:
     packages:

Dockerfile

@@ -1,37 +1,30 @@
-FROM drydock-prod.workiva.net/workiva/smithy-runner-generator:355624 as build
+FROM google/dart:1.24.3 as build
+
+ARG GIT_SSH_KEY
+ARG KNOWN_HOSTS_CONTENT
+RUN mkdir /root/.ssh/ && \
+    echo "$KNOWN_HOSTS_CONTENT" > "/root/.ssh/known_hosts" && \
+    chmod 700 /root/.ssh/ && \
+    umask 0077 && echo "$GIT_SSH_KEY" >/root/.ssh/id_rsa && \
+    eval "$(ssh-agent -s)" && ssh-add /root/.ssh/id_rsa
+
+WORKDIR /build/
+ADD . /build/
 
-# Build Environment Vars
 ARG BUILD_ID
-ARG BUILD_NUMBER
-ARG BUILD_URL
 ARG GIT_COMMIT
 ARG GIT_BRANCH
 ARG GIT_TAG
 ARG GIT_COMMIT_RANGE
 ARG GIT_HEAD_URL
 ARG GIT_MERGE_HEAD
 ARG GIT_MERGE_BRANCH
-ARG GIT_SSH_KEY
-ARG KNOWN_HOSTS_CONTENT
-
-WORKDIR /build/
-ADD . /build/
-
-RUN mkdir /root/.ssh
-RUN echo "$KNOWN_HOSTS_CONTENT" > "/root/.ssh/known_hosts"
-RUN echo "$GIT_SSH_KEY" > "/root/.ssh/id_rsa"
-RUN chmod 700 /root/.ssh/
-RUN chmod 600 /root/.ssh/id_rsa
 
-RUN echo "Starting the script sections" && \
-                eval "$(ssh-agent -s)" && \ 
-                ssh-add /root/.ssh/id_rsa && \
-		pub get && \
-		git config remote.origin.url "[email protected]:Workiva/semver-audit-dart.git" && \
-		git clone ssh://[email protected]/workiva/semver-audit-dart.git --branch 1.4.0 && \
-		git config remote.origin.url "[email protected]:Workiva/json_schema.git" && \
-		pub global activate --source path ./semver-audit-dart && \
-		pub global run semver_audit report --repo Workiva/json_schema && \
-		echo "Script sections completed"
+RUN pub get && \
+    git config remote.origin.url "[email protected]:Workiva/semver-audit-dart.git" && \
+    git clone ssh://[email protected]/workiva/semver-audit-dart.git --branch 1.4.0 && \
+    git config remote.origin.url "[email protected]:Workiva/json_schema.git" && \
+    pub global activate --source path ./semver-audit-dart && \
+    pub global run semver_audit report --repo Workiva/json_schema
 ARG BUILD_ARTIFACTS_BUILD=/build/pubspec.lock
 FROM scratch