Enable Azure Pipelines UPM releases (#2)

* Update Export-upm-packages.sh to support Azure Pipelines
* Remove UPM Package generation from .travis.yml

UPM package generation now works with Azure Pipelines

.travis.yml

@@ -5,20 +5,18 @@ install:
 - sudo python2 ./scripts/install-unity.py --package Unity 2017.1.1f1
 before_script:
 - sudo chmod -R a+rwx /Applications/Unity
-- sudo chmod +x ./scripts/export-upm-package.sh
 script:
 - msbuild ./GLTFSerialization/GLTFSerialization.sln /t:GLTFSerialization /p:TargetFramework=net35
 - "./scripts/export-unity-package.sh"
-- msbuild ./GLTFSerialization/GLTFSerialization.sln /t:GLTFSerialization
-- "./scripts/export-upm-package.sh"
 deploy:
   provider: releases
   file: 
   - "./current-package/UnityGLTF.unitypackage"
-  - "./current-package/org.khronos.UnityGLTF.zip"
   skip_cleanup: true
   on:
     repo: KhronosGroup/UnityGLTF
+    branch: releases
     tags: true
   api-key:
     secure: "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"
+

scripts/export-upm-package.sh

@@ -5,13 +5,25 @@ log_file=$(pwd)/build/unity-mac.log
 
 cached_folder=$(pwd)
 upm_name=org.khronos.UnityGLTF
+echo "##vso[task.setvariable variable=UPM_NAME]$upm_name"
 upm_src_folder_path=$(pwd)/UnityGLTF/Assets/UnityGLTF
 upm_manifest_path=$(pwd)/scripts/package.json
 upm_staging_path=$(pwd)/current-package/$upm_name
 upm_staging_UWP_plugins_path=$upm_staging_path/UnityGLTF/Plugins/uap10.0.10586
 upm_zip_export_path=$(pwd)/current-package/$upm_name.zip
 upm_targz_export_path=$(pwd)/current-package/$upm_name.tar.gz
 
+if [[ $BUILD_SOURCEBRANCH == *"refs/tags"* ]]; then
+  echo "Detected refs/tags in $BUILD_SOURCEBRANCH so this must be a tagged release build."
+  # Splits the string with "refs/tags", takes the second value and then 
+  # swaps out any slashes for underscores
+  GIT_TAG=$(echo $BUILD_SOURCEBRANCH | awk -F'refs/tags/' '{print $2}' | tr '/' '_')
+  echo "Setting GIT_TAG variable to: $GIT_TAG"
+  echo "##vso[task.setvariable variable=GIT_TAG]$GIT_TAG"
+else
+  echo "Did not detect refs/tags in $BUILD_SOURCEBRANCH so skipping GIT_TAG variable set"
+fi
+
 # msbuild spits out every single dependency dll for UWP
 # These are the only files that are needed by the UPM package for Unity 2018.3+
 # Including all the files in the UWP plugin directory causes name collision errors when 
@@ -42,19 +54,10 @@ echo "Changing to $upm_staging_path folder"
 cd $upm_staging_path
 
 echo "Cleaning out UWP plugin DLLs that are not needed for Unity2018.3+"
-echo "Only keeping the following files:"
-printf '%s\n' "${upm_UWP_Plugins[@]}"
 find $upm_staging_UWP_plugins_path -maxdepth 1 -type f | grep -vE "$(IFS=\| && echo "${upm_UWP_Plugins[*]}")" | xargs rm
 
-echo "Creating .zip of UPM package"
-sudo zip -q -r $upm_zip_export_path ./
-
-echo "Creating .tar.gz of UPM package"
-tar -zcf $upm_targz_export_path ./
-
-echo "Changing back to original folder $cached_folder"
-cd $cached_folder
-
-echo "Finishing with code $error_code"
-exit $error_code
-
+echo "Files left in $upm_staging_UWP_plugins_path"
+for entry in "$upm_staging_UWP_plugins_path"/*
+do
+  echo "$entry"
+done