Fix some CI issues

- Don't error if trying to tag and the tag already exists.
- Add the build arguments to the Docker build.
- Set an environment variable for the Docker build rather than using
- the username because the username always exists (on master anyway).

.travis.yml

@@ -8,6 +8,7 @@ before_install:
   - export MAJOR_VERSION="2"
   - export VSCODE_VERSION="1.38.1"
   - export VERSION="$MAJOR_VERSION.$TRAVIS_BUILD_NUMBER"
+  - export TAG="$VERSION-vsc$VSCODE_VERSION"
   - if [[ "$TRAVIS_BRANCH" == "master" ]]; then export MINIFY="true"; fi
   - if [[ "$TRAVIS_BRANCH" == "master" ]]; then export PACKAGE="true"; fi
 
@@ -33,27 +34,26 @@ jobs:
     - name: "Docker build"
       os: linux
       dist: trusty
+      env: DOCKER_BUILD="true"
       if: branch == master AND tag IS blank
-      script:
-        - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin hub.docker.com
-        - docker build -t codercom/code-server:$VERSION -t codercom/code-server:v2 .
+      script: docker build --build-arg codeServerVersion="$VERSION" --build-arg vscodeVersion="$VSCODE_VERSION" -t codercom/code-server:"$VERSION" -t codercom/code-server:v2 .
 
 git:
   depth: 3
 
 before_deploy:
-  - echo "$VERSION-vsc$VSCODE_VERSION" "$TRAVIS_COMMIT"
+  - echo "$TAG" "$TRAVIS_COMMIT"
   - git config --local user.name "$USER_NAME"
   - git config --local user.email "$USER_EMAIL"
-  - git tag "$VERSION-vsc$VSCODE_VERSION" "$TRAVIS_COMMIT"
+  - if ! git tag "$TAG" "$TRAVIS_COMMIT" ; then echo "$TAG already exists"; fi
 
 deploy:
   - provider: releases
     file_glob: true
     prerelease: true
-    tag_name: "$VERSION-vsc$VSCODE_VERSION"
+    tag_name: "$TAG"
     target_commitish: "$TRAVIS_COMMIT"
-    name: "$VERSION-vsc$VSCODE_VERSION"
+    name: "$TAG"
     skip_cleanup: true
     api_key:
       secure: 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
@@ -63,14 +63,16 @@ deploy:
     on:
       repo: cdr/code-server
       branch: master
+
   - provider: script
     script:
-      - docker push codercom/code-server:$VERSION
+      - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin hub.docker.com
+      - docker push codercom/code-server:"$VERSION"
       - docker push codercom/code-server:v2
     on:
       repo: cdr/code-server
       branch: master
-      condition: -n "$DOCKER_USERNAME"
+      condition: -n "$DOCKER_BUILD"
 
 cache:
   yarn: true