Edit the contents of a file
Published on December 28th, 2022We have scaffolder actions that allow you do a number of “editing” actions on a file:
- Append some content to a file using -
roadiehq:utils:fs:append - Merge values in a json file using -
roadiehq:utils:json:merge - Replace a file with new content using -
roadiehq:utils:fs:write
Proper editing functionality is not well supported by Backstage at the moment though.
Append to a file
Actions used:
You can check the available actions if you visit /create/actions.
Example Template
---
apiVersion: scaffolder.backstage.io/v1beta3
kind: Template
metadata:
name: append-to-file-template
title: Append To File template example
description: Template to append content to a file in a repo and raise a PR for the change. NB - This will create a new file if a file does not exist at the path given.
spec:
owner: roadie
type: service
parameters:
- title: PR Data
properties:
repository:
title: Repository name
type: string
description: The name of the repository
org:
title: Repository Organisation
type: string
description: The Github org that the repository is in
pr_branch:
title: PR Branch
type: string
description: The new branch to make a pr from
- title: Append content
properties:
path:
title: Path
type: string
description: The path to the file you want to append this content to in the scaffolder workspace
content:
title: Text area input
type: string
description: Add your new entity
ui:widget: textarea
ui:options:
rows: 10
ui:help: 'Make sure it is valid by checking the schema at `/tools/entity-preview`'
ui:placeholder: |
---
apiVersion: backstage.io/v1alpha1
kind: Component
metadata:
name: backstage
spec:
type: library
owner: CNCF
lifecycle: experimental
steps:
- id: fetch-repo
name: Fetch repo
action: fetch:plain
input:
url: https://github.com/${{ parameters.org }}/${{ parameters.repository }}
- id: append-file
name: Append To File Or Create New
action: roadiehq:utils:fs:append
input:
path: ${{ parameters.path }}
content: ${{ parameters.content }}
- id: publish-pr
name: Publish PR
action: publish:github:pull-request
input:
repoUrl: github.com?repo=${{ parameters.repository }}&owner=${{ parameters.org }}
branchName: ${{ parameters.pr_branch }}
title: Add entity to ${{ parameters.path }}
description: PR created from Roadie Backstage scaffolder
- id: log-message
name: Log PR URL
action: debug:log
input:
message: 'PR url: ${{ steps["publish-pr"].output.remoteUrl }}'
Merge new json into a file
Actions used:
You can check the available actions if you visit /create/actions.
Example Template
---
apiVersion: scaffolder.backstage.io/v1beta3
kind: Template
metadata:
name: merge-json-template
title: Merge in Json
description: Merge in some json to an existing file and open a pull request for it.
spec:
owner: roadie
type: service
parameters:
properties:
repository:
title: Repository name
type: string
description: The name of the repository
org:
title: Repository Organisation
type: string
description: The Github org that the repository is in
pr_branch:
title: PR Branch
type: string
description: The new branch to make a pr from
path:
title: Path
type: string
description: The path to the desired new file
content:
title: Json
type: string
description: Json to merge in
ui:widget: textarea
ui:options:
rows: 10
ui:placeholder: |
{"hello": "world"}
steps:
- id: log-message
name: Log PR URL
action: debug:log
input:
message: "Fetching repo from https://github.com/${{ parameters.org }}/${{ parameters.repository }}"
- id: fetch-repo
name: Fetch repo
action: fetch:plain
input:
url: "https://github.com/${{ parameters.org }}/${{ parameters.repository }}"
- id: merge
name: Merge json
action: roadiehq:utils:json:merge
input:
path: ${{ parameters.path }}
content: ${{ parameters.content }}
- id: publish-pr
name: Publish PR
action: publish:github:pull-request
input:
repoUrl: github.com?repo=${{ parameters.repository }}&owner=${{ parameters.org }}
branchName: ${{ parameters.pr_branch }}
title: Merge json into ${{ parameters.path }}
description: This PR was created by a Roadie Backstage scaffolder task
- id: log-message
name: Log PR URL
action: debug:log
input:
message: 'PR url: ${{ steps["publish-pr"].output.remoteUrl }}'Overwrite a file
Actions used:
You can check the available actions if you visit /create/actions.
Example Template
---
apiVersion: scaffolder.backstage.io/v1beta3
kind: Template
metadata:
name: overwrite-file-template-example
title: Overwrite file template
description: Overwrite a file with the given content.
spec:
owner: roadie
type: service
parameters:
- title: PR Data
properties:
repository:
title: Repository name
type: string
description: The name of the repository
org:
title: Repository Organisation
type: string
description: The Github org that the repository is in
pr_branch:
title: PR Branch
type: string
description: The new branch to make a pr from
- title: Overwrite content
properties:
path:
title: Path
type: string
description: The path to the file you want to overwrite this content to in the scaffolder workspace
content:
title: Text area input
type: string
description: New file content
ui:widget: textarea
ui:options:
rows: 20
ui:help: 'Make sure it is valid by checking the schema at `/tools/entity-preview`'
ui:placeholder: |
---
apiVersion: backstage.io/v1alpha1
kind: Component
metadata:
name: backstage
spec:
type: library
owner: CNCF
lifecycle: experimental
steps:
- id: fetch-repo
name: Fetch repo
action: fetch:plain
input:
url: https://github.com/${{ parameters.org }}/${{ parameters.repository }}
- id: append-file
name: Overwrite file content
action: roadiehq:utils:fs:write
input:
path: ${{ parameters.path }}
content: ${{ parameters.content }}
- id: publish-pr
name: Publish PR
action: publish:github:pull-request
input:
repoUrl: github.com?repo=${{ parameters.repository }}&owner=${{ parameters.org }}
branchName: ${{ parameters.pr_branch }}
title: Overwrite content for ${{ parameters.path }}
description: This PR was created by a Roadie Backstage scaffolder task
- id: log-message
name: Log PR URL
action: debug:log
input:
message: 'PR url: ${{ steps["publish-pr"].output.remoteUrl }}'