Creating appspec json file with codebuild (bash)

Question

  post_build:
    commands:
      - aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com
      - docker push $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:$IMAGE_TAG
      - cat <<'EOF' > appspec.json
        {
           "\"version\"":0.0,
           "\"Resources\"":[{
             "\"TargetService\"":{
               "\"Type\"":"\"AWS::ECS::Service\"",
               "\"Properties\"":{
                 "\"TaskDefinition\"":"\"arn:aws:ecs:ap-southeast-1:414193698200:task-definition/deploy-wmi:1\""
               }
             }
           }]
        }
        EOF

Hi, how can I create an appspec.json build artifact in codebuild buildspec? I tried above and it doesn't work. The error is:

    /codebuild/output/tmp/script.sh: line 8: warning: here-document at line 4 delimited by end-of-file (wanted `EOF')
cat: {: No such file or directory
cat: "version":0.0,: No such file or directory
cat: "Resources":[{: No such file or directory
cat: "TargetService":{: No such file or directory
cat: "Type":"AWS::ECS::Service",: No such file or directory
cat: "Properties":{: No such file or directory
cat: "TaskDefinition":"arn:aws:ecs:ap-southeast-1:414193698200:task-definition/deploy-wmi:1": No such file or directory
cat: }: No such file or directory
cat: }: No such file or directory
cat: }]: No such file or directory
cat: }: No such file or directory
cat: EOF: No such file or directory

I have also tried adding infront of { until EOF, but it also doesnt work:

    /codebuild/output/tmp/script.sh: line 8: warning: here-document at line 4 delimited by end-of-file (wanted `EOF')
cat: {: No such file or directory
cat: "version":0.0,: No such file or directory
cat: "Resources":[{: No such file or directory
cat: "TargetService":{: No such file or directory
cat: "Type":"AWS::ECS::Service",: No such file or directory
cat: "Properties":{: No such file or directory
cat: "TaskDefinition":"arn:aws:ecs:ap-southeast-1:414193698200:task-definition/deploy-wmi:1": No such file or directory
cat: }: No such file or directory
cat: }: No such file or directory
cat: }]: No such file or directory
cat: }: No such file or directory
cat: EOF: No such file or directory

I have also tried putting all in one line ({"version":0.0,...) but my CodeDeploy said the template cant be parsed. Thanks

score 0 · Answer 1 · answered May 26 '22 at 11:06

You are missing the pipe's literal style indicator for YAML multiline strings.

post_build:
  commands:
    - aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com
    - docker push $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME:$IMAGE_TAG
    - |
      cat <<'EOF' > appspec.json
      {
        "version":0.0,
        "Resources":[{
          "TargetService":{
            "Type":"AWS::ECS::Service",
            "Properties":{
              "TaskDefinition":"arn:aws:ecs:ap-southeast-1:414193698200:task-definition/deploy-wmi:1"
            }
          }
        }]
      }
      EOF

You could also achieve the same including a bash script in your repository to create the file and execute it in this phase. It will probably be cleaner that dumping your json file like in the example above.

Creating appspec json file with codebuild (bash)

1 Answers1