Add a startup configuration file for flowr

src/config.ts

@@ -0,0 +1,38 @@
+import type { MergeableRecord} from './util/objects'
+import {deepMergeObject} from './util/objects'
+import path from 'path'
+import fs from 'fs'
+import {log} from './util/log'
+
+export interface FlowrConfigOptions extends MergeableRecord {
+	ignoreSourceCalls: boolean
+}
+
+export const defaultConfigFile = 'flowr.json'
+export const defaultConfigOptions: FlowrConfigOptions = {
+	ignoreSourceCalls: false
+}
+export const config = parseConfigOptions(process.cwd())
+
+function parseConfigOptions(workingDirectory: string, configFile = defaultConfigFile): FlowrConfigOptions {
+	let searchPath = path.resolve(workingDirectory)
+	do{
+		const configPath = path.join(searchPath, configFile)
+		if(fs.existsSync(configPath)) {
+			try {
+				const read = fs.readFileSync(configPath,{encoding: 'utf-8'})
+				// assign default values to all config options except for the specified ones
+				const ret = deepMergeObject(defaultConfigOptions, JSON.parse(read) as FlowrConfigOptions)
+				log.info(`Using config ${JSON.stringify(ret)} from ${configPath}`)
+				return ret
+			} catch(e) {
+				log.error(`Failed to parse config file at ${configPath}: ${(e as Error).message}`)
+			}
+		}
+		// move up to parent directory (apparently this is somehow the best way to do it in node, what)
+		searchPath = searchPath.split(path.sep).slice(0, -1).join(path.sep)
+	} while(fs.existsSync(searchPath))
+
+	log.info('Using default config')
+	return defaultConfigOptions
+}

src/dataflow/internal/process/functions/source.ts

@@ -9,6 +9,7 @@
 import {type DataflowScopeName, type Identifier, overwriteEnvironments, type REnvironmentInformation, resolveByName} from '../../../environments'
 import type {DataflowInformation} from '../../info'
 import {dataflowLogger} from '../../../index'
+import {config} from '../../../../config'
 
 let sourceProvider = requestProviderFromFile()
 
@@ -32,6 +33,11 @@
 export function processSourceCall<OtherInfo>(functionCall: RFunctionCall<OtherInfo & ParentInformation>, data: DataflowProcessorInformation<OtherInfo & ParentInformation>, information: DataflowInformation): DataflowInformation {
 	const sourceFile = functionCall.arguments[0] as RArgument<ParentInformation> | undefined
 	if(sourceFile?.value?.type == RType.String) {
+		if(config.ignoreSourceCalls) {
+			dataflowLogger.info(`Skipping source call ${JSON.stringify(sourceFile)} (disabled in config file)`)
+			return information
+		}
+
 		const path = removeTokenMapQuotationMarks(sourceFile.lexeme)
 		const request = sourceProvider.createRequest(path)