Set CGO_ENABLED=0 for static link (#198)

.circleci/config.yml

@@ -4,6 +4,8 @@ jobs:
     docker:
       - image: circleci/golang:1.13.3
     steps:
+      - run: |
+          sudo apt install -y file
       - run: |
           mkdir -p ~/bin
           echo 'export PATH="$HOME/bin:$PATH"' >> $BASH_ENV
@@ -22,6 +24,10 @@ jobs:
       - run: bash <(curl -s https://codecov.io/bash)
       - run: make run
       - run: make dist
+      - run: |
+          unzip dist/gh/kubelogin_linux_amd64.zip -d /tmp
+          file /tmp/kubelogin
+          /tmp/kubelogin --help
       - run: |
           if [ "$CIRCLE_TAG" ]; then
             make release

Makefile

@@ -22,7 +22,7 @@ run: $(TARGET_PLUGIN)
 
 dist:
     # make the zip files for GitHub Releases
-	VERSION=$(CIRCLE_TAG) goxzst -d dist/gh/ -i "LICENSE" -o "$(TARGET)" -t "kubelogin.rb oidc-login.yaml" -- -ldflags "$(LDFLAGS)"
+	VERSION=$(CIRCLE_TAG) CGO_ENABLED=0 goxzst -d dist/gh/ -i "LICENSE" -o "$(TARGET)" -t "kubelogin.rb oidc-login.yaml" -- -ldflags "$(LDFLAGS)"
 	zipinfo dist/gh/kubelogin_linux_amd64.zip
 	# make the Homebrew formula
 	mv dist/gh/kubelogin.rb dist/