在Travis上用php-imagick阅读pdf文件

Question

I need to read a pdf file on Travis with php-imagick extension.

I learned i need to adjust imagick policy.xml file to allow imagick to read pdf files. So i added a custom policy.xml.

env:
  global:
     - MAGICK_CONFIGURE_PATH=$HOME/.config/ImageMagick/
...
before_script:
    # Allow imagemagick to read PDF files
    - echo $MAGICK_CONFIGURE_PATH
    - mkdir $MAGICK_CONFIGURE_PATH
    - echo '<policymap>' > $MAGICK_CONFIGURE_PATH/policy.xml
    - echo '<policy domain="coder" rights="read" pattern="PDF" />' >> $MAGICK_CONFIGURE_PATH/policy.xml
    - echo '</policymap>' >> $MAGICK_CONFIGURE_PATH/policy.xml
    - sudo rm /etc/ImageMagick-6/policy.xml

but still the build fails with [Failed to read the file]

The file is there, locally it works, i suspect that imagick still cant read PDFs. The new policy also seems to be applied:

$convert -list policy

Path: /home/travis/.config/ImageMagick/policy.xml
  Policy: Coder
    rights: Read 
    pattern: PDF
  Policy: Coder
    rights: Read 
    pattern: PDF
Path: [built-in]
  Policy: Undefined
    rights: None 

How can i fix this?

Failed build is: https://travis-ci.org/ivoba/silverstripe-simple-pdf-preview/jobs/563919021

Answer 1

Did you try it on a Standard Debian Environment. In my case Imagick was able to process PDFs without further do - Please ensure, that the Source PDF is in a non Adobe-Restricted Version eg PDF1.4. Otherwise it might not work:

$im = new \Imagick();
$im->setResolution(300, 300);
$im->readImage($path_of_pdf_file);
$im->writeImages($folder_to_place_each_page . '/' . $name, false)

Answer 2

After a while i just answer my own question:

The problem was that imagemagick needs ghostscript for working with pdfs and ghostscript needs to be installed in Debian.

So additionally to editing the policy.xml file, adding the install command to .travis.yml did the trick.

sudo apt-get install -y ghostscript

Full working travis file is: https://github.com/ivoba/silverstripe-simple-pdf-preview/blob/master/.travis.yml