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GitHub Action

diff-pdf

v1.1.4

diff-pdf

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diff-pdf

Action for visually comparing two PDF files using diff-pdf

Installation

Copy and paste the following snippet into your .yml file.

 
              
- name: diff-pdf

              
  uses: nowsprinting/[email protected]
Learn more about this action in nowsprinting/diff-pdf-action

Choose a version

diff-pdf-action

Docker build Test

Action for visually comparing two PDF files using diff-pdf.

By default, This action is successful if there are no differences and failure if the two PDFs differ. If given the --output-diff option, it produces a PDF file with visually highlighted differences.

Inputs

file1

Input PDF file1 path. (required)

file2

Input PDF file2 path. (required)

options

Specify diff-pdf command options if you need. Follows are quoted from diff-pdf --help:

-h, --help               	show this help message
-v, --verbose            	be verbose
-s, --skip-identical     	only output pages with differences
-m, --mark-differences   	additionally mark differences on left side
-g, --grayscale          	only differences will be in color, unchanged parts will show as gray
--output-diff=<str>      	output differences to given PDF file
--channel-tolerance=<num>	consider channel values to be equal if within specified tolerance
--dpi=<num>              	rasterization resolution (default: 300 dpi)

Note: --view option is not available.

suppress-diff-error

If set true, Exit code to 0 even there is a difference. (Expected to be used with --output-diff option)

Outputs

None.

Note: Output following log when running this action. However, don't worry there is no problem.

Unable to init server: Could not connect: Connection refused
01:20:19: Error: Unable to initialize GTK+, is DISPLAY set properly?

Examples

Using action

Expect to match (e.g. visual regression tests)

jobs:
  diff:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3
      - uses: nowsprinting/diff-pdf-action@v1
        with:
          file1: expected.pdf
          file2: actual.pdf
          options: --verbose
        # If PDFs do not match, this step will fail.

Generate diff PDF (e.g. before and after on pull-request)

jobs:
  diff:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3
      - uses: nowsprinting/diff-pdf-action@v1
        with:
          file1: base.pdf
          file2: head.pdf
          options: --skip-identical --output-diff=diff.pdf --dpi=100
          suppress-diff-error: true

Using container

jobs:
  diff:
    runs-on: ubuntu-latest
    container:
      image: ghcr.io/nowsprinting/diff-pdf:latest

    steps:
      - uses: actions/checkout@v3
      - run: diff-pdf --verbose expected.pdf actual.pdf

License

MIT License

How to contribute

Open an issue or create a pull request.