No request when glslify module is already downloaded

orx-glslify/src/main/kotlin/FileSystemUtils.kt

@@ -5,6 +5,7 @@ import org.rauschig.jarchivelib.ArchiverFactory
 import java.io.File
 import java.io.InputStream
 import java.nio.file.Files
+import java.nio.file.Path
 import java.nio.file.Paths
 
 internal fun extractGzipStream(tarStream: InputStream, dest: File) {
@@ -13,8 +14,7 @@ internal fun extractGzipStream(tarStream: InputStream, dest: File) {
     archiver.extract(tarStream, dest)
 }
 
-internal fun moveFilesUp(moduleDir: File) {
-    val modulePath = Paths.get(moduleDir.path)
+internal fun moveFilesUp(modulePath: Path) {
     val packageFolder = modulePath.resolve("package")
 
     val packageFiles = Files.list(packageFolder).filter {
@@ -28,14 +28,14 @@ internal fun moveFilesUp(moduleDir: File) {
     }
 }
 
-internal fun parseModule(module: String): Pair<String, String> {
+internal fun parseModule(module: String): Pair<String, Path> {
     val path = Paths.get(module)
     val pathLen = path.nameCount
     val moduleName = path.subpath(0, 1).toString()
-    var shaderPath = "index"
+    var shaderPath = Paths.get("index")
 
     if (pathLen > 1) {
-        shaderPath = path.subpath(1, pathLen).toString()
+        shaderPath = path.subpath(1, pathLen)
     }
 
     return Pair(moduleName, shaderPath)

orx-glslify/src/main/kotlin/Glslify.kt

@@ -5,16 +5,20 @@ import java.io.ByteArrayInputStream
 import java.io.File
 import java.io.InputStream
 import java.net.URL
+import java.nio.file.Files
+import java.nio.file.Path
+import java.nio.file.Paths
 import javax.net.ssl.HttpsURLConnection
+import kotlin.streams.toList
 
-const val BASE_URL = "https://registry.npmjs.org"
-const val GLSLIFY_PATH = "src/main/resources/glslify"
-const val IMPORT_PATT = """#pragma\sglslify:\s*(.*)\s=\s*require\('([\w\-]+)'\)"""
-const val EXPORT_PATT = """#pragma\sglslify:\s*export\(([\w\-]+)\)"""
+internal const val BASE_URL = "https://registry.npmjs.org"
+internal const val GLSLIFY_PATH = "src/main/resources/glslify"
+internal const val IMPORT_PATT = """#pragma\sglslify:\s*(.*)\s=\s*require\('?([\w\-\\/]+).*'?\)$"""
+internal const val EXPORT_PATT = """#pragma\sglslify:\s*export\(([\w\-]+)\)"""
 
 internal val shaderExtensions = arrayOf("glsl", "frag")
 
-data class GlslifyImport(
+private data class GlslifyImport(
         val functionName: String,
         val pkgName: String,
         var exists: Boolean
@@ -23,64 +27,42 @@ data class GlslifyImport(
 private val logger = KotlinLogging.logger {}
 
 fun glslify(module: String, renameFunctionTo: String? = null): String {
-    val (moduleName: String, shaderPath: String) = parseModule(module)
-    val moduleDir = File("$GLSLIFY_PATH/$moduleName")
+    val (moduleName: String, shaderPath: Path) = parseModule(module)
+    val moduleDir = Paths.get("$GLSLIFY_PATH/$moduleName")
 
-    val packageUrl = getPackageUrl(moduleName)
+    return glslifyImport(moduleName, moduleDir, shaderPath, renameFunctionTo)
+}
 
-    if (packageUrl.isNullOrEmpty()) {
-        throw error("[glslify] $moduleName not found")
-    }
-
-    if (!moduleDir.exists()) {
-        try {
-            moduleDir.mkdirs()
-
-            val url = URL(packageUrl)
-            val con = url.openConnection()
-            val tarStream: InputStream = ByteArrayInputStream(con.getInputStream().readBytes())
-
-            extractGzipStream(tarStream, moduleDir)
-
-            moveFilesUp(moduleDir)
-
-            File("$moduleDir/package").deleteRecursively()
-
-            logger.trace("[glslify] $moduleName downloaded")
-            (con as HttpsURLConnection).disconnect()
-        } catch (ex: Exception) {
-            logger.error(ex) { "[glslify]: There was an error getting $moduleName" }
-
-            return ""
-        }
+private fun glslifyImport(moduleName: String, moduleDir: Path, shaderPath: Path, renameFunctionTo: String? = null): String {
+    if (!Files.exists(moduleDir)) {
+        fetchModule(moduleName, moduleDir)
     } else {
         logger.trace("[glslify] $moduleName already exists.. Skipping download")
     }
 
-    val shaderFile: File
+    val shaderFile: Path
 
     try {
         shaderFile = shaderExtensions.map {
-            File("$GLSLIFY_PATH/$moduleName/$shaderPath.$it")
-        }.first { it.exists() }
+            moduleDir.resolve("$shaderPath.$it")
+        }.first { Files.exists(it) }
     } catch (ex: NoSuchElementException) {
         logger.trace("[glslify] $moduleName: $shaderPath doesn't lead to any shader file")
 
         return ""
     }
 
-    val shader = mutableListOf<String>()
     val imports = mutableListOf<GlslifyImport>()
     var exportName: String? = null
 
-    shaderFile.useLines { sequence ->
-        for (line in sequence.iterator()) {
-            if (line.contains("#pragma")) {
+    var shader = Files.lines(shaderFile).filter { line ->
+        line.contains("#pragma").let { isPragma ->
+            if (isPragma) {
                 Regex(IMPORT_PATT).find(line)?.let {
                     if (it.groupValues.size > 1) {
-                        val importExists = File("$GLSLIFY_PATH/${it.groupValues[2]}").exists()
+                        val importPath = Paths.get(GLSLIFY_PATH).resolve(it.groupValues[2])
 
-                        imports.add(GlslifyImport(it.groupValues[1], it.groupValues[2], importExists))
+                        imports.add(GlslifyImport(it.groupValues[1], it.groupValues[2], Files.exists(importPath)))
                     }
                 }
 
@@ -89,11 +71,11 @@ fun glslify(module: String, renameFunctionTo: String? = null): String {
                         exportName = it.groupValues[1]
                     }
                 }
-            } else {
-                shader.add(line)
             }
+
+            !isPragma // we want to exclude any #pragma statements
         }
-    }
+    }.toList().joinToString("\n")
 
     val missingImports = imports.filter { !it.exists }
 
@@ -105,11 +87,36 @@ fun glslify(module: String, renameFunctionTo: String? = null): String {
         throw error("[glslify] Please declare the missing imports")
     }
 
-    var shaderString = shader.joinToString("\n")
-
     if (renameFunctionTo != null && exportName != null) {
-        shaderString = shaderString.replace( exportName!!, renameFunctionTo)
+        shader = shader.replace( exportName!!, renameFunctionTo)
     }
 
-    return shaderString
+    return shader
+}
+
+internal fun fetchModule(moduleName: String, moduleDir: Path) {
+    val packageUrl = getPackageUrl(moduleName)
+
+    if (packageUrl.isNullOrEmpty()) {
+        throw error("[glslify] $moduleName not found")
+    }
+
+    try {
+        Files.createDirectories(moduleDir)
+
+        val url = URL(packageUrl)
+        val con = url.openConnection()
+        val tarStream: InputStream = ByteArrayInputStream(con.getInputStream().readBytes())
+
+        extractGzipStream(tarStream, moduleDir.toFile())
+
+        moveFilesUp(moduleDir)
+
+        moduleDir.resolve("package").toFile().deleteRecursively()
+
+        logger.trace("[glslify] $moduleName downloaded")
+        (con as HttpsURLConnection).disconnect()
+    } catch (ex: Exception) {
+        logger.error(ex) { "[glslify]: There was an error getting $moduleName" }
+    }
 }