Check length of descriptions for F-Droid (#1083)

* Check length of descriptions for F-Droid

Fixes #1080

* Shorten en-US string

.travis.yml

@@ -33,4 +33,6 @@ android:
 before_install:
   - yes | sdkmanager "platforms;android-27"
 
-script: ./gradlew build connectedCheck --stacktrace
+script:
+  - ./gradlew build connectedCheck --stacktrace
+  - bash config/travis/validate_fastlane_metadata.sh

config/travis/validate_fastlane_metadata.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+exitcode=0
+
+for file in fastlane/metadata/android/*/full_description.txt
+do
+    chars=$(cat $file | wc -m)
+    if [ "$chars" -gt 4000 ]
+    then
+        echo "$file too long"
+        let exitcode++
+    fi
+done
+
+for file in fastlane/metadata/android/*/short_description.txt
+do
+    chars=$(cat $file | wc -m)
+    if [ "$chars" -gt 80 ]
+    then
+        echo "$file too long"
+        let exitcode++
+    fi
+done
+
+exit $exitcode

fastlane/metadata/android/en-US/short_description.txt

@@ -1 +1 @@
-Use your Pebble/Mi Band/Amazfit Bip/Hplus device without the vendor's closed source application and without the need to create an account and transmit any of your data to the vendor's servers.
+Use your wearable without the need to create an account and transmit your data