@sap/cds-dk/lib/init/template/ias/index.js

Command line client and development toolkit for the SAP Cloud Application Programming Model

const { readProject } = require('../../projectReader')
const { merge, sort } = require('../../merge')
const { srv4, approuter, mtxSidecar4 } = require('../../registries/mta')
const cds = require('../../../cds')
const { read, write } = cds.utils
// const mvn = require('../../mvn')

module.exports = class IasTemplate extends require('../../plugin') {

    static help() {
        return 'authentication via IAS'
    }

    static hasInProduction(env) {
        // REVISIT: Ugly, find more generic solution
        return env.requires?.auth?.kind === 'ias' ||
               cds.cli.argv?.[0]?.includes('ias') || cds.cli.argv?.[0]?.includes('ams') ||
               cds.cli.options?.add?.has('ias') || cds.cli.options?.add?.has('ams') || false
    }

    async run() {
        const project = readProject()
        const { configFile, isNodejs } = project
        await merge(__dirname, 'files/package.json.hbs').into(configFile, { project, forceOverwrite: true })
        if (isNodejs) await sort('package.json', 'dependencies')
        // if (project.isJava) await mvn.add('ias')
    }

    async combine() {
        const project = readProject()
        const { isJava, hasMta, hasCfManifest, hasHelm, hasHelmUnifiedRuntime, hasApprouter, hasMultitenancy, srvPath } = project

        if (hasMultitenancy) {
            const conf = (await read('mtx/sidecar/package.json')) ?? {}
            conf.cds ??= {}
            const profile = conf.cds.profile
            if (profile) delete conf.cds.profile
            conf.cds.profiles ??= profile ? [profile] : []
            if (!conf.cds.profiles.includes('subscription-manager')) {
                conf.cds.profiles.push('subscription-manager')
            }
            await write('mtx/sidecar/package.json', conf, { spaces: 2 })
            await merge(__dirname, 'files/sidecar.package.json.hbs').into('mtx/sidecar/package.json')
        }

        if (hasMta) {
            const srv = srv4(srvPath)
            const identity = { in: 'resources', where: { 'parameters.service': 'identity' } }
            const srvIdentityBinding = { in: [srv, 'requires'], where: { 'parameters.config.app-identifier': 'srv' } }
            const srvCertUrlApi = { in: [srv, 'provides'], where: { 'name': 'srv-api' } }
            const additions = [srv, identity, srvIdentityBinding, srvCertUrlApi]
            const overwrites = []

            if (hasApprouter) {
                additions.push(approuter)
                additions.push({ in: [approuter, 'requires'], where: { 'parameters.config.app-identifier': 'approuter' }})
                const srvApi = { in: [approuter, 'requires'], where: { 'name': 'srv-api' } }
                additions.push(srvApi)
                overwrites.push({ item: [srvApi, 'properties.url'], withValue: '~{srv-cert-url}' })
            }
            if (hasMultitenancy) {
                const mtxSidecar = mtxSidecar4(isJava ? 'mtx/sidecar' : 'gen/mtx/sidecar')
                const mtxIdentityBinding = { in: [mtxSidecar, 'requires'], where: { 'parameters.config.app-identifier': 'mtx' } }
                additions.push(mtxSidecar, mtxIdentityBinding)
            }
            await merge(__dirname, 'files/mta.yaml.hbs').into('mta.yaml', { project, additions, overwrites })
        }

        if (hasHelm || hasHelmUnifiedRuntime) {
            const identity = { in: 'dependencies', where: { 'alias': 'identity' } }
            await merge(__dirname, 'files/Chart.yaml.hbs').into('chart/Chart.yaml', { project, additions: [identity] })
            await merge(__dirname, 'files/values.yaml.hbs').into('chart/values.yaml', { project })
            // TODO: MTX, approuter
        }

        if (hasCfManifest) {
            await this.#combineWithCfManifest(project) // REVISIT: we shouldn't overly promote cf-manifest
        }
    }

    async #combineWithCfManifest(project) {
        const srv = { in: 'applications', where: { 'name': `${project.appName}-srv` } }
        const identityBinding = { in: 'services', where: { 'parameters.app-identifier': 'srv' } }
        await merge(__dirname, 'files/manifest.yml.hbs').into('manifest.yml', { project, additions: [srv, identityBinding] })

        const identity = { in: 'create-services', where: { 'broker': 'identity' } }
        await merge(__dirname, 'files/services-manifest.yml.hbs').into('services-manifest.yml', { project, additions: [identity] })
    }
}