[build] Package build artifacts with make jenkins (dotnet#153)

Update the `make jenkins` target to package up the `bin` directory for
(hopeful) use on other machines.

The generated package is named:

	oss-xamarin-android_vVERSION_OS-ARCH_BRANCH_COMMIT.zip

where:

* **VERSION** is the new `$(ProductVersion)` MSBuild property
    along with the number of commits since `$(ProductVersion)`
    was *changed*
* **OS** is the name of the OS that built the package
* **ARCH** is the OS architecture
* **BRANCH** is the git branch being built (usually `master`)
* **COMMIT** is the git commit that was built.

For example:

	oss-xamarin.android_v7.0.99.0_Darwin-x86_64_jonp-zip-output_c4eab00.zip

The package file is *not* an installer, just a ZIP package, but should
contain everything needed to *create* an installer.

This also copies `tools/scripts/xabuild` into the appropriate
`bin/$(Configuration)/bin` directories so that an `xabuild` script is
installed as part of the package, and `xabuild` is updated to setup
the various environment variables accordingly so it is invokable from
the `bin/$(Configuration)/bin` directories.

Configuration.props

@@ -12,6 +12,7 @@
       Condition=" '$(DoNotLoadOSProperties)' != 'True' "
   />
   <PropertyGroup>
+    <ProductVersion>7.0.99</ProductVersion>
     <HostOS Condition=" '$(HostOS)' == '' And '$(OS)' == 'Windows_NT' ">Windows</HostOS>
     <HostCc Condition=" '$(HostCc)' == '' ">$(HostCc64)</HostCc>
     <HostCxx Condition=" '$(HostCxx)' == '' ">$(HostCxx64)</HostCxx>

build-tools/scripts/BuildEverything.mk

@@ -1,3 +1,18 @@
+PRODUCT_VERSION   = $(shell $(MSBUILD) $(MSBUILD_FLAGS) /p:DoNotLoadOSProperties=True /nologo /v:minimal /t:GetProductVersion build-tools/scripts/Info.targets | tr -d '[[:space:]]')
+
+GIT_BRANCH        = $(shell LANG=C git rev-parse --abbrev-ref HEAD | tr -d '[[:space:]]' | tr -C a-zA-Z0-9- _)
+GIT_COMMIT        = $(shell LANG=C git log --no-color --first-parent -n1 --pretty=format:%h)
+
+# In which commit did $(PRODUCT_VERSION) change? 00000000 if uncommitted
+-commit-of-last-version-change    = $(shell LANG=C git blame Configuration.props | grep '<ProductVersion>' | grep -v grep | sed 's/ .*//')
+
+# How many commits have passed since $(-commit-of-last-version-change)?
+# "0" when commit hash is invalid (e.g. 00000000)
+-num-commits-since-version-change = $(shell LANG=C git log $(-commit-of-last-version-change)..HEAD --oneline 2>/dev/null | wc -l | sed 's/ //g')
+
+ZIP_OUTPUT        = oss-xamarin.android_v$(PRODUCT_VERSION).$(-num-commits-since-version-change)_$(OS)-$(OS_ARCH)_$(GIT_BRANCH)_$(GIT_COMMIT).zip
+
+
 # $(ALL_API_LEVELS) and $(ALL_FRAMEWORKS) must be kept in sync w/ each other
 ALL_API_LEVELS    = 1 2 3 4 5 6 7 8 9 10    11  12  13  14  15      16    17    18    19    20        21    22    23    24
 # this was different when API Level 21 was "L". Same could happen in the future.
@@ -58,7 +73,7 @@ FRAMEWORK_ASSEMBLIES = \
 	$(FRAMEWORKS:%=bin/Debug/lib/xbuild-frameworks/MonoAndroid/%/Mono.Android.dll)    \
 	$(FRAMEWORKS:%=bin/Release/lib/xbuild-frameworks/MonoAndroid/%/Mono.Android.dll)
 
-leeroy jenkins: prepare $(RUNTIME_LIBRARIES) $(TASK_ASSEMBLIES) $(FRAMEWORK_ASSEMBLIES)
+leeroy jenkins: prepare $(RUNTIME_LIBRARIES) $(TASK_ASSEMBLIES) $(FRAMEWORK_ASSEMBLIES) $(ZIP_OUTPUT)
 
 $(TASK_ASSEMBLIES): bin/%/lib/xbuild/Xamarin/Android/Xamarin.Android.Build.Tasks.dll:
 	$(MSBUILD) $(MSBUILD_FLAGS) /p:Configuration=$* $(_MSBUILD_ARGS) $(SOLUTION)
@@ -71,3 +86,13 @@ $(FRAMEWORK_ASSEMBLIES):
 $(RUNTIME_LIBRARIES):
 	$(MSBUILD) $(MSBUILD_FLAGS) /p:Configuration=Debug   $(_MSBUILD_ARGS) $(SOLUTION)
 	$(MSBUILD) $(MSBUILD_FLAGS) /p:Configuration=Release $(_MSBUILD_ARGS) $(SOLUTION)
+
+_BUNDLE_ZIPS  = $(wildcard bin/*/bundle-*.zip)
+
+package-oss-name:
+	@echo ZIP_OUTPUT=$(ZIP_OUTPUT)
+
+package-oss $(ZIP_OUTPUT):
+	if [ -d bin/Debug/bin ]   ; then cp tools/scripts/xabuild bin/Debug/bin   ; fi
+	if [ -d bin/Release/bin ] ; then cp tools/scripts/xabuild bin/Release/bin ; fi
+	zip -r "$(ZIP_OUTPUT)" bin $(_BUNDLE_ZIPS:%=--exclude %)

samples/HelloWorld/HelloWorld.csproj

@@ -16,7 +16,7 @@
     <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
     <AndroidUseLatestPlatformSdk>true</AndroidUseLatestPlatformSdk>
   </PropertyGroup>
-  <Import Project="..\..\..\Configuration.props" />
+  <Import Project="..\..\Configuration.props" />
   <PropertyGroup>
     <TargetFrameworkVersion>$(AndroidFrameworkVersion)</TargetFrameworkVersion>
   </PropertyGroup>

tools/scripts/xabuild

@@ -1,26 +1,53 @@
 #!/bin/bash -e
-topdir="$(cd `dirname "$0"`/../.. && pwd)"
+
+name=$(basename "$0")
 
 if [ -z "$CONFIGURATION" ] ; then
 	CONFIGURATION=Debug
 fi
 
+xabuilddir="$(cd `dirname "$0"` && pwd)"
+
+if [[ "$xabuilddir" == */tools/scripts ]] ; then
+	topdir="$xabuilddir/../../bin/$CONFIGURATION"
+	Paths_targets="$xabuilddir/../../build-tools/scripts/Paths.targets"
+elif [[ "$xabuilddir" == */bin ]] ; then
+	topdir="$xabuilddir/.."
+else
+	(>&2 echo "$name: Could not determine location to Xamarin.Android locations.")
+	exit 1
+fi
+
 if [ -z "$MSBUILD" ] ; then
 	MSBUILD=xbuild
 fi
 
-export TARGETS_DIR="$topdir/bin/$CONFIGURATION/lib/xbuild"
-export MSBuildExtensionsPath="$TARGETS_DIR" 
-export MONO_ANDROID_PATH="$topdir/bin/$CONFIGURATION"
-export XBUILD_FRAMEWORK_FOLDERS_PATH="$topdir/bin/$CONFIGURATION/lib/xbuild-frameworks"
-ANDROID_NDK_PATH=$(xbuild /nologo /v:minimal /t:GetAndroidNdkFullPath $topdir/build-tools/scripts/Paths.targets)
-ANDROID_SDK_PATH=$(xbuild /nologo /v:minimal /t:GetAndroidSdkFullPath $topdir/build-tools/scripts/Paths.targets)
+if [ -z "$ANDROID_NDK_PATH" -a -f "$Paths_targets" ] ; then
+	ANDROID_NDK_PATH=$($MSBUILD /nologo /v:minimal /t:GetAndroidNdkFullPath "$Paths_targets")
+	ANDROID_NDK_PATH=$(echo $ANDROID_NDK_PATH | sed 's/^\w*//g')
+	export ANDROID_NDK_PATH
+fi
+
+if [ -z "$ANDROID_SDK_PATH" -a -f "$Paths_targets" ] ; then
+	ANDROID_SDK_PATH=$($MSBUILD /nologo /v:minimal /t:GetAndroidSdkFullPath "$Paths_targets")
+	ANDROID_SDK_PATH=$(echo $ANDROID_SDK_PATH | sed 's/^\w*//g')
+	export ANDROID_SDK_PATH
+fi
 
-ANDROID_NDK_PATH=$(echo $ANDROID_NDK_PATH | sed 's/^\w*//g')
-ANDROID_SDK_PATH=$(echo $ANDROID_SDK_PATH | sed 's/^\w*//g')
+if [ -z "$ANDROID_NDK_PATH" ] ; then
+	>&2 echo "$name: Could not determine Android NDK path. Please export the \$ANDROID_NDK_PATH environment variable."
+	exit 1
+fi
+
+if [ -z "$ANDROID_SDK_PATH" ] ; then
+	>&2 echo "$name: Could not determine Android SDK path. Please export the \$ANDROID_SDK_PATH environment variable."
+	exit 1
+fi
 
-export ANDROID_NDK_PATH
-export ANDROID_SDK_PATH
+export TARGETS_DIR="$topdir/lib/xbuild"
+export MSBuildExtensionsPath="$TARGETS_DIR"
+export MONO_ANDROID_PATH="$topdir"
+export XBUILD_FRAMEWORK_FOLDERS_PATH="$topdir/lib/xbuild-frameworks"
 
 exec $MSBUILD /p:Configuration=$CONFIGURATION $MSBUILD_OPTIONS \
 	/p:AndroidNdkDirectory="$ANDROID_NDK_PATH" \