Update proguard settings, test proguarded JAR on CI (#811)

build.sbt

@@ -472,9 +472,11 @@ lazy val proguardedCli = Seq(
   proguardVersion.in(Proguard) := SharedVersions.proguard,
   proguardOptions.in(Proguard) ++= Seq(
     "-dontwarn",
+    "-dontoptimize", // required since the switch to scala 2.12
     "-keep class coursier.cli.Coursier {\n  public static void main(java.lang.String[]);\n}",
     "-keep class coursier.cli.IsolatedClassLoader {\n  public java.lang.String[] getIsolationTargets();\n}",
-    "-adaptresourcefilenames **.properties"
+    "-adaptresourcefilenames **.properties",
+    """-keep class scala.Symbol { *; }"""
   ),
   javaOptions.in(Proguard, proguard) := Seq("-Xmx3172M"),
   artifactPath.in(Proguard) := proguardDirectory.in(Proguard).value / "coursier-standalone.jar",

scripts/generate-launcher.sh

@@ -1,20 +1,24 @@
 #!/bin/bash
 
+# grepped and updated during releases
 VERSION=1.1.0-M1
+ACTUAL_VERSION="${ACTUAL_VERSION:-"$VERSION"}"
 CACHE_VERSION=v1
 
+OUTPUT="${OUTPUT:-"coursier"}"
+
 SBTPACK_LAUNCHER="$(dirname "$0")/../cli/target/pack/bin/coursier"
 
 if [ ! -f "$SBTPACK_LAUNCHER" ]; then
   sbt ++2.12.4 "project cli" pack
 fi
 
 "$SBTPACK_LAUNCHER" bootstrap \
-  --intransitive io.get-coursier::coursier-cli:$VERSION \
+  --intransitive "io.get-coursier::coursier-cli:$ACTUAL_VERSION" \
   --classifier standalone \
   -J "-noverify" \
   --no-default \
   -r central \
   -r sonatype:releases \
-  -f -o coursier \
+  -f -o "$OUTPUT" \
   "$@"

scripts/travis.sh

@@ -116,6 +116,23 @@ testBootstrap() {
       echo "Error: unexpected output from bootstrapped echo command." 1>&2
       exit 1
     fi
+
+
+    if echo "$OSTYPE" | grep -q darwin; then
+      GREP="ggrep"
+    else
+      GREP="grep"
+    fi
+
+    CURRENT_VERSION="$("$GREP" -oP '(?<=")[^"]*(?<!")' version.sbt)"
+
+    sbt scalaFromEnv cli/publishLocal
+    ACTUAL_VERSION="$CURRENT_VERSION" OUTPUT="coursier-test" scripts/generate-launcher.sh -r ivy2Local
+    ./coursier-test bootstrap -o cs-echo-launcher io.get-coursier:echo:1.0.0
+    if [ "$(./cs-echo-launcher foo)" != foo ]; then
+      echo "Error: unexpected output from bootstrapped echo command (generated by proguarded launcher)." 1>&2
+      exit 1
+    fi
   fi
 }