import java.text.SimpleDateFormat

apply plugin: ReleasePlugin

class Semver {

String version

def snapshot

def getStringVersion() {

return snapshot ? "$version-SNAPSHOT" : version

}

def nextPatch() {

def parts = version.split("\\.")

def patch = Integer.parseInt(parts[2]) + 1

return "${parts[0]}.${parts[1]}.${patch}"

}

def nextMinor() {

def parts = version.split("\\.")

def minor = Integer.parseInt(parts[1]) + 1

return "${parts[0]}.${minor}.0"

}

}

class ChangeLogTask extends DefaultTask {

def current

def next

@TaskAction

def update() {

def repository = project.auth0.repo

def file = new File('CHANGELOG.md')

def output = new File('CHANGELOG.md.release')

output.newWriter().withWriter { writer ->

file.eachLine { line, number ->

if (number == 0 && !line.startsWith('# Change Log')) {

throw new GradleException('Change Log file is not properly formatted')

}

writer.println(line)

if (number == 0 || number > 1) {

return

}

def formatter = new SimpleDateFormat('yyyy-MM-dd')

writer.println()

writer.println("## [${next}](https://github.com/auth0/${repository}/tree/${next}) (${formatter.format(new Date())})")

writer.println("[Full Changelog](https://github.com/auth0/${repository}/compare/${current}...${next})")

def command = ["curl", "https://webtask.it.auth0.com/api/run/wt-hernan-auth0_com-0/oss-changelog.js?webtask_no_cache=1&repo=${repository}&milestone=${next}", "-f", "-s", "-H", "Accept: text/markdown"]

def content = command.execute()

content.consumeProcessOutputStream(writer)

if (content.waitFor() != 0) {

throw new GradleException("Failed to request changelog for version ${next}")

}

}

}

file.delete()

output.renameTo('CHANGELOG.md')

}

}

class ReleaseTask extends DefaultTask {

def tagName

@TaskAction

def perform() {

def path = project.getRootProject().getProjectDir().path

project.exec {

commandLine 'git', 'add', 'README.md'

workingDir path

}

project.exec {

commandLine 'git', 'add', 'CHANGELOG.md'

workingDir path

}

project.exec {

commandLine 'git', 'commit', '-m', "Release ${tagName}"

workingDir path

}

project.exec {

commandLine 'git', 'tag', "${tagName}"

workingDir path

}

}

}

class ReadmeTask extends DefaultTask {

def current

def next

final filename = 'README.md'

@TaskAction

def update() {

def file = new File(filename)

def updated = "compile '${project.group}:${project.name}:${next}'"

def oldSingleQuote = "compile '${project.group}:${project.name}:${current}'"

def oldDoubleQuote = "compile \"${project.group}:${project.name}:${current}\""

def contents = file.getText('UTF-8')

contents = contents.replace(oldSingleQuote, updated).replace(oldDoubleQuote, updated)

file.write(contents, 'UTF-8')

}

}

class ReleasePlugin implements Plugin<Project> {

void apply(Project target) {

def semver = current()

target.version = semver.stringVersion

def version = semver.version

def nextMinor = semver.nextMinor()

def nextPatch = semver.nextPatch()

target.task('changelogMinor', type: ChangeLogTask) {

current = version

next = nextMinor

}

target.task('changelogPatch', type: ChangeLogTask) {

current = version

next = nextPatch

}

target.task('readmeMinor', type: ReadmeTask, dependsOn: 'changelogMinor') {

current = version

next = nextMinor

}

target.task('readmePatch', type: ReadmeTask, dependsOn: 'changelogPatch') {

current = version

next = nextPatch

}

target.task('releaseMinor', type: ReleaseTask, dependsOn: 'readmeMinor') {

tagName = nextMinor

}

target.task('releasePatch', type: ReleaseTask, dependsOn: 'readmePatch') {

tagName = nextPatch

}

}

static def current() {

def current = describeGit(false)

def snapshot = current == null

if (snapshot) {

current = describeGit(snapshot, '0.0.1')

}

return new Semver(snapshot: snapshot, version: current)

}

static def describeGit(boolean snapshot, String defaultValue = null) {

def command = ['git', 'describe', '--tags', (snapshot ? '--abbrev=0' : '--exact-match')].execute()

def stdout = new ByteArrayOutputStream()

def errout = new ByteArrayOutputStream()

command.consumeProcessOutput(stdout, errout)

if (command.waitFor() != 0) {

Logging.getLogger(ReleasePlugin.class).debug(errout.toString())

return defaultValue

}

if (stdout.toByteArray().length > 0) {

return stdout.toString().replace('\n', "")

}

return defaultValue

}

}