Attempt to detect existing config files matching the expected basename plus one of the supported file extensions

Author: JamesMGreene

src/set-pages-config.js

@@ -1,10 +1,22 @@
+constfs=require('fs')
 constcore=require('@actions/core')
 const{ ConfigParser }=require('./config-parser')
 constremoveTrailingSlash=require('./remove-trailing-slash')
 const{ convertErrorToAnnotationProperties }=require('./error-utils')
 
 constSUPPORTED_FILE_EXTENSIONS=['.js','.cjs','.mjs']
 
+functiondetectOrDefaultConfigFile(fileBaseName,defaultExt='.js'){
+for(constextofSUPPORTED_FILE_EXTENSIONS){
+constpotentialConfigFile=`./${fileBaseName}${ext}`
+if(fs.existsSync(potentialConfigFile)){
+returnpotentialConfigFile
+}
+}
+// If none of them exist yet, default to returning the filename with the defaultExt extension
+return`./${fileBaseName}${defaultExt}`
+}
+
 // Return the settings to be passed to a{ConfigParser} for a given static site generator,
 // optional configuration file path, and a Pages siteUrl value to inject
 functiongetConfigParserSettings({ staticSiteGenerator, generatorConfigFile, siteUrl }){
@@ -13,7 +25,7 @@ function getConfigParserSettings({staticSiteGenerator, generatorConfigFile, sit
 switch(staticSiteGenerator){
 case'nuxt':
 return{
-configurationFile: generatorConfigFile||'./nuxt.config.js',
+configurationFile: generatorConfigFile||detectOrDefaultConfigFile('nuxt.config'),
 blankConfigurationFile: `${__dirname}/blank-configurations/nuxt.js`,
 properties: {
 // Configure a base path on the router
@@ -29,7 +41,7 @@ function getConfigParserSettings({staticSiteGenerator, generatorConfigFile, sit
 path=removeTrailingSlash(path)
 
 return{
-configurationFile: generatorConfigFile||'./next.config.js',
+configurationFile: generatorConfigFile||detectOrDefaultConfigFile('next.config'),
 blankConfigurationFile: `${__dirname}/blank-configurations/next.js`,
 properties: {
 // Static export
@@ -47,7 +59,7 @@ function getConfigParserSettings({staticSiteGenerator, generatorConfigFile, sit
 }
 case'gatsby':
 return{
-configurationFile: generatorConfigFile||'./gatsby-config.js',
+configurationFile: generatorConfigFile||detectOrDefaultConfigFile('gatsby-config'),
 blankConfigurationFile: `${__dirname}/blank-configurations/gatsby.js`,
 properties: {
 // Configure a path prefix
@@ -61,7 +73,7 @@ function getConfigParserSettings({staticSiteGenerator, generatorConfigFile, sit
 path=removeTrailingSlash(path)
 
 return{
-configurationFile: generatorConfigFile||'./svelte.config.js',
+configurationFile: generatorConfigFile||detectOrDefaultConfigFile('svelte.config'),
 blankConfigurationFile: `${__dirname}/blank-configurations/sveltekit.js`,
 properties: {
 // Configure a base path