Merge branch 'gradle-wrapper' into 'master'

Make the gradle wrapper smarter

@eighthave PTAL

This will help with issues like https://gitlab.com/fdroid/fdroiddata/issues/515

See merge request !166

buildserver/gradle

@@ -5,9 +5,6 @@ basedir="$(dirname $bindir)"
 verdir="${basedir}/versions"
 args=("$@")
 
-v_all=($(cd "${verdir}" && ls | sort -rV))
-echo "Available gradle versions: ${v_all[@]}"
-
 run_gradle() {
 	"${verdir}/${v_found}/bin/gradle" "${args[@]}"
 	exit $?
@@ -29,16 +26,27 @@ d_plugin_v=(2.14.1 2.14.1 2.12 2.12 2.4 2.4 2.3 2.2.1 2.2.1  2.1  2.1 1.12 1.12
 # All gradle versions we know about
 plugin_v=(3.0 2.14.1 2.14 2.13 2.12 2.11 2.10 2.9 2.8 2.7 2.6 2.5 2.4 2.3 2.2.1 2.2 2.1 1.12 1.11 1.10 1.9 1.8 1.7 1.6 1.4)
 
-# Find the highest version available
-for v in ${plugin_v[*]}; do
-	if contains $v "${v_all[*]}"; then
-		v_def=$v
-		break
-	fi
-done
+v_all=${plugin_v[@]}
+echo "Available gradle versions: ${v_all[@]}"
 
 # Earliest takes priority
-for f in build.gradle ../build.gradle; do
+for f in {.,..}/gradle/wrapper/gradle-wrapper.properties; do
+	[[ -f $f ]] || continue
+	while read l; do
+		if [[ $l == 'distributionUrl='* ]]; then
+			wrapper_ver=$(echo -n "$l" | sed "s/.*gradle-\\([0-9\\.\\+]\\+\\).*/\\1/")
+		fi
+	done < $f
+done
+
+if [[ -n $wrapper_ver ]]; then
+	v_found=$wrapper_ver
+	echo "Found $v_found via distributionUrl"
+	run_gradle
+fi
+
+# Earliest takes priority
+for f in {.,..}/build.gradle; do
 	[[ -f $f ]] || continue
 	while read l; do
 		if [[ -z "$plugin_pver" && $l == *'com.android.tools.build:gradle:'* ]]; then
@@ -72,6 +80,14 @@ if [[ -n $plugin_pver ]]; then
 	fi
 fi
 
+# Find the highest version available
+for v in ${plugin_v[*]}; do
+	if contains $v "${v_all[*]}"; then
+		v_def=$v
+		break
+	fi
+done
+
 if [[ -z $v_found ]]; then
 	echo "No suitable gradle version found - defaulting to $v_def"
 	v_found=$v_def