actions BUGFIX branch detection

Author: michalvasko

.github/workflows/ci.yml

@@ -117,7 +117,12 @@ jobs:
           ${{ matrix.config.packager }} update
           ${{ matrix.config.packager }} install $DEFAULT_PACKAGES ${{ matrix.config.packages }}
 
-          GIT_BRANCH=`echo ${{ github.ref }} | cut -d'/' -f 3`
+          if ${{ github.event_name == 'push' }}
+            then GIT_BRANCH=`echo ${{ github.ref }} | cut -d'/' -f 3`
+          else
+            GIT_BRANCH=${{ github.base_ref }}
+          fi
+
           git clone -b $GIT_BRANCH https://github.com/CESNET/libyang.git
           cd libyang
           mkdir build
@@ -164,7 +169,12 @@ jobs:
           sudo apt-get install $DEFAULT_PACKAGES abi-dumper abi-compliance-checker
           sudo snap install core universal-ctags
 
-          GIT_BRANCH=`echo ${{ github.ref }} | cut -d'/' -f 3`
+          if ${{ github.event_name == 'push' }}
+            then GIT_BRANCH=`echo ${{ github.ref }} | cut -d'/' -f 3`
+          else
+            GIT_BRANCH=${{ github.base_ref }}
+          fi
+
           git clone -b $GIT_BRANCH https://github.com/CESNET/libyang.git
           cd libyang
           mkdir build
@@ -204,7 +214,12 @@ jobs:
           sudo apt-get update
           sudo apt-get install $DEFAULT_PACKAGES lcov
 
-          GIT_BRANCH=`echo ${{ github.ref }} | cut -d'/' -f 3`
+          if ${{ github.event_name == 'push' }}
+            then GIT_BRANCH=`echo ${{ github.ref }} | cut -d'/' -f 3`
+          else
+            GIT_BRANCH=${{ github.base_ref }}
+          fi
+
           git clone -b $GIT_BRANCH https://github.com/CESNET/libyang.git
           cd libyang
           mkdir build