User SSH key support, #27

Author: tzununbekov

go-1.x/buildtemplate.yaml

@@ -26,6 +26,9 @@ spec:
   - name: DIRECTORY
     description: The subdirectory of the workspace/repo
     default: ""
+  - name: SSH_KEY
+    description: Name of ssh key file to authenticate in private git repository  
+    default: git-ssh-key
   steps:
   - name: dockerfile
     image: gcr.io/kaniko-project/executor@sha256:30ba460a034a8051b3222a32e20cb6049741e58384e3adf8c8987c004e2f2ab9
@@ -36,16 +39,23 @@ spec:
     - |
       cd /workspace/${DIRECTORY}
       cat <<EOF > Dockerfile
-      FROM golang:alpine
-        RUN apk --no-cache add git ca-certificates \
+        FROM golang:alpine
+        # Skip known public key check to be able to pull from private repositories 
+        ENV GIT_SSH_COMMAND "ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
+        RUN apk --no-cache add git ca-certificates openssh \
         && go get github.com/triggermesh/aws-custom-runtime \
         && go get github.com/triggermesh/knative-lambda-runtime/go-1.x \
         && go get github.com/golang/dep/...
 
         WORKDIR /go/src/handler
         COPY . .
-        RUN if [ -f "Gopkg.toml" ]; then dep ensure; fi
-        RUN go get -v && go install
+        RUN if [ -f "$HOME/.ssh/id_$SSH_KEY" ]; then \
+            eval "\$(ssh-agent -s)"; \
+            ssh-add $HOME/.ssh/id_$SSH_KEY; \
+        fi \
+        && if [ -f "Gopkg.toml" ]; then dep ensure; fi \
+        && go get -v \
+        && go install
 
         FROM alpine
         WORKDIR /opt