sourcemap tests

scripts/esbuild-wrapper.js

@@ -1,4 +1,7 @@
 const esbuild = require("esbuild")
+const fs = require("fs")
+const path = require("path")
+
 const config = require(process.cwd() +
     (process.argv?.length > 3 ? "/" + process.argv[3] : "/esbuild.config.js"))
 const { watch } = require("chokidar")
@@ -20,10 +23,17 @@ async function build(catchError) {
         buildResults = buildResults
             ? await buildResults.rebuild()
             : await esbuild.build(config.options)
+        if (config.options.metafile) {
+            fs.writeFileSync(
+                path.dirname(config.options.outfile) + "/meta.json",
+                JSON.stringify(buildResults.metafile, null, 4)
+            )
+        }
     } catch (e) {
         console.log(e)
         if (!catchError) throw e
     }
+
     const timerEnd = Date.now()
     log(`built in ${timerEnd - timerStart}ms.`)
 }