KScript

1. KScript @OhadShai
2. My Name is Ohad
3. And I write scripts in...
4. Bash
5. Perl
6. And you?
7. Kotlin
8. fun main() { println("Hello World!") } ››› kotlinc Hello.kt -include-runtime -d hello.jar ››› java -jar hello.jar Hello World!
9. println("Hello World!") ››› kotlinc -script helloKotlinScript.kts Hello World!
10. println(args.joinToString(" ")) ››› kotlinc -script helloKotlinScript.kts Hello World! Hello World!
11. import java.io.File fun explore(current: File) { println(current.path) if (current.isDirectory) { current.listFiles().forEach { explore(it) } } } explore(File("../scripts")) ››› kotlinc -script FileExplorer.kts ../scripts ../scripts/requirements.txt ../scripts/pgdump_parser.py ../scripts/pgdump_diff.py ../scripts/update_schema.py ../scripts/.gitignore ../scripts/utils.py ../scripts/README.md
12. KScript
13. println("Hello World!") ››› kscript hello.kts Hello World!
14. println("Hello World!") ››› time kscript hello.kts Hello World! kscript hello.kts 7.33s user 0.78s system 224% cpu 3.608 total ››› time kscript hello.kts Hello World! kscript hello.kts 0.49s user 0.18s system 120% cpu 0.555 total
15. #!/usr/bin/env kscript println("Hello World!") ››› ./hello.kts zsh: permission denied: ./hello.kts ››› chmod u+x ./hello.kts ››› ./hello.kts Hello World!
16. Input modes Script > kscript script-file.kts URL > kscript https://git.io/v1cG6 Inline* > kscript 'println("Hi")' REPL > kscript -i test Text Processing > cat some_file | kscript -t 'lines .filter { "^de0[-0]*".toRegex().matches(it) } .map { it + "foo:" } .print() '
17. kscript Open source created by Holger Brandl for Type Safe scripts
18. Major Features Dependencies & Imports @file:MavenRepository("jcenter","http://jcenter.bintray.com" ) @file:DependsOnMaven("net.postgis:postgis-jdbc:2.3.0") @file:DependsOnMaven("com.github.ajalt:clikt:2.3.0")
19. Major Features Packaging into self executing jar (using Capsule) ››› kscript --package hello.kts [kscript] Packaging script 'hello' into standalone executable... [kscript] Finished packaging into 'hello'
20. IDEA bootstrap ➜ ~ kscript ——idea my-script.kts [kscript] Setting up idea project from my-script.kts
21. Issues encountered • Dependency resolution did not always work on my Mac (and errors were sometimes funky) • Auto completion in IDE is not always working as expected.
22. Questions?
23. Thanks!