Replace

This preprocessor replaces a string with another string in a folder paths.

preprocess:
  - replace:
      path: "/dist" # path to replace
      skip_files: [] # default: [] files to skip, use glob pattern, included your path like /dist/**/index.html
      skip_dirs: [] # default: [] dirs to skip, it will skip all files in the dir, included your path like /dist/assets
      contents:
      - regex: "" # regex to find, override old if not empty
        old: "" # old string
        new: "" # new string
        value: "" # value from load name, key value and type is map[string]interface{}

Example

In this example, before to serve the folder, replacing all content with the value from load.
This is useful for frontend applications to adding environment variables for each platform.

loads:
  - statics:
    - content:
        content: |
          Turna: XXX2
        name: values

preprocess:
  - replace:
      path: ./testdata/html
      contents:
        value: values

server:
  entrypoints:
    web:
      address: ":8080"
  http:
    middlewares:
      project:
        folder:
          path: ./testdata/html
          browse: false
          spa: false
          index: true
          cache_regex:
            - regex: .*
              cache_control: no-cache
    routers:
      project:
        path: /*
        middlewares:
          - project