D9056: Add the description tag to the generated pkgconfig files

[Christophe Giboudeaux]

cgiboudeaux created this revision.
cgiboudeaux added reviewers: dfaure, apol.
Restricted Application added projects: Frameworks, Build System.
Restricted Application added subscribers: Build System, Frameworks.

REVISION SUMMARY
  pkgconfig complains when the .pc file doesn't have a description. eg:
  $ pkg-config Baloo
  Package 'Baloo' has no Description: field
  
  With this change, if the DESCRIPTION parameter is not used,
  ECM_GENERATE_PKGCONFIG_FILE will :
  
  - First look if there's a metainfo.yaml file and get the description from there
  - If the file doesn't exist, or if the description tag is empty or non-existent,
  
  create a description based on the LIB_NAME value

TEST PLAN
  Tests added & pass

REPOSITORY
  R240 Extra CMake Modules

BRANCH
  pkgconfig-part1

REVISION DETAIL
  https://phabricator.kde.org/D9056

AFFECTED FILES
  modules/ECMGeneratePkgConfigFile.cmake
  tests/ECMGeneratePkgConfigFile/KF5CoreAddons.pc
  tests/ECMGeneratePkgConfigFile/KF5CoreAddons2.pc
  tests/ECMGeneratePkgConfigFile/KF5CoreAddons3.pc
  tests/ECMGeneratePkgConfigFile/metainfo_with_description.yaml
  tests/ECMGeneratePkgConfigFile/metainfo_with_empty_description.yaml
  tests/ECMGeneratePkgConfigFile/metainfo_without_description.yaml
  tests/ECMGeneratePkgConfigFile/run_test.cmake.config

To: cgiboudeaux, dfaure, apol
Cc: #frameworks, #build_system
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