feat(Release): Enable command-line releases

[barbeau]

Summary:

Work-in-progress - please do not merge

This pull request adds the ability to do command-line releases using the shadow Gradle plugin.

Usage:

./gradlew shadowJar

...which will output a file to \cli-app\build\libs such as gtfs-validator-v1.1.0-SNAPSHOT.jar.

This file can then be run from the command-line with the normal Java conventions:

java -jar gtfs-validator-v1.1.0-SNAPSHOT.jar -u https://transitfeeds.com/p/mbta/64/latest/download -z input.zip -i input -o output

See the updated RELEASE.md file for more details.

TODO:

• Implement basic command line release
• Update release docs
• Add minification - https://imperceptiblethoughts.com/shadow/configuration/minimizing/. Original release JAR was 11,090 KB, minified JAR is 6,587 KB.
• Typo in release docs - fix order to ./
• Change output directory? - No, just output path to compiled JAR to console when building (see comment below)
• Change file name to remove -all? Yes
• Fix warning added during minification - see comment below. Fixed in 506e03f.
• Add "v" to version number to match previous releases
• Update usage examples and release docs to printed file output, removed "-all"
• Add SNAPSHOT instruction for generating release
• Test again!

Closes #66, Closes #52

[barbeau]

After adding minification, I'm getting this warning at the end of execution (although it seems like everything works):

Apr 10, 2020 6:07:53 PM com.fasterxml.jackson.databind.ext.Java7Handlers <clinit>
WARNING: Unable to load JDK7 types (java.nio.file.Path): no Java7 type support added

Seems to be related to this issue:
FasterXML/jackson-databind#2446

I've tried bumping to the latest Jackson version '2.10.3' in the exporter and adapter modules but I'm still seeing it.

UPDATE

Fixed in 506e03f

[barbeau]

Instead of moving the output location of the JAR, I'm printing the location of the JAR to the console now:

[barbeau]

@Fabrice-V Ok, this should be ready for your review! Please try to run on your machine to make sure this works cross-platform (I've tested on Windows 10).

[ghost]

All good here as well, LGTM!