Set up automatic android snapshot publishing

Summary:
Set up automatic publishing to Maven Snapshots if the current
VERSION_NAME ends in `-SNAPSHOT`.

Reviewed By: danielbuechele

Differential Revision: D9539838

fbshipit-source-id: 6e413fa3b02966946bb867eebe7ba8b863f291b9

.travis.yml

@@ -90,3 +90,9 @@ matrix:
         - cd ../
       script:
         - ./gradlew :sample:build
+      deploy:
+        - provider: script
+          script: "scripts/publish-android-snapshot.sh"
+          skip_cleanup: true
+          on:
+            branch: master

scripts/gradle-publish-keys.enc

@@ -0,0 +1 @@
+Salted__<EFBFBD>9<EFBFBD><EFBFBD><EFBFBD>L<19>%Y<>b<EFBFBD>V<EFBFBD><56><EFBFBD><EFBFBD>(<28><>M<EFBFBD><4D>
<01><><EFBFBD><EFBFBD>i<><69>B<EFBFBD><42>b<EFBFBD><62>[P<><50><1D>'\<5C>r<EFBFBD><72><EFBFBD>r<EFBFBD><72>l,s<><73><0E>W<><57>kPc9<63>ڦ!<21>%p<>"<22><>~<7E>=<3D>rTnM3<><33>&<26><><<3C><>z<><7A>?<3F>-<2D>v$<24>57<35>bW,

scripts/publish-android-snapshot.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/bash
+set -e
+
+BASEDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )/.." && pwd )"
+IS_SNAPSHOT="$(grep 'VERSION_NAME=[0-9\.]\+-SNAPSHOT' "$BASEDIR/gradle.properties")"
+
+if [ "$ANDROID_PUBLISH_KEY" == "" ]; then
+  echo "No encryption key. Skipping snapshot deployment."
+  exit
+elif [ "$IS_SNAPSHOT" == "" ]; then
+  echo "Skipping build. Given build doesn't appear to be a SNAPSHOT release."
+  exit 1
+else
+  openssl aes-256-cbc -d -in scripts/gradle-publish-keys.enc -k "$ANDROID_PUBLISH_KEY" >> "$BASEDIR/gradle.properties"
+  "$BASEDIR"/gradlew uploadArchives --info
+fi