Convert project to ESM (#58)

* Convert to ESM, enforce file single naming convention.

* Update fs-extra esm usage.

* Fix minimatch import.

* fixes

* triple-beam issue is finally fixed.

src/util/MavenUtil.ts

@@ -0,0 +1,89 @@
+import { normalize } from 'path'
+import { URL } from 'url'
+
+export class MavenUtil {
+
+    public static readonly ID_REGEX = /(.+):(.+):([^@]+)()(?:@{1}(.+)$)?/
+    public static readonly ID_REGEX_WITH_CLASSIFIER = /(.+):(.+):(?:([^@]+)(?:-([a-zA-Z]+)))(?:@{1}(.+)$)?/
+
+    public static mavenComponentsToIdentifier(
+        group: string,
+        artifact: string,
+        version: string,
+        classifier?: string,
+        extension?: string
+    ): string {
+        return `${group}:${artifact}:${version}${classifier != null ? `:${classifier}` : ''}${extension != null ? `@${extension}` : ''}`
+    }
+
+    public static isMavenIdentifier(id: string): boolean {
+        return MavenUtil.ID_REGEX.test(id) || MavenUtil.ID_REGEX_WITH_CLASSIFIER.test(id)
+    }
+
+    public static getMavenComponents(id: string, extension = 'jar'): {
+        group: string
+        artifact: string
+        version: string
+        classifier?: string
+        extension: string
+    } {
+        if (!MavenUtil.isMavenIdentifier(id)) {
+            throw new Error('Id is not a maven identifier.')
+        }
+
+        let result
+
+        if (MavenUtil.ID_REGEX_WITH_CLASSIFIER.test(id)) {
+            result = MavenUtil.ID_REGEX_WITH_CLASSIFIER.exec(id)
+        } else {
+            result = MavenUtil.ID_REGEX.exec(id)
+        }
+
+        if (result != null) {
+            return {
+                group: result[1],
+                artifact: result[2],
+                version: result[3],
+                classifier: result[4] || undefined,
+                extension: result[5] || extension
+            }
+        }
+
+        throw new Error('Failed to process maven data.')
+    }
+
+    public static mavenIdentifierToString(id: string, extension = 'jar'): string {
+        const tmp = MavenUtil.getMavenComponents(id, extension)
+
+        return MavenUtil.mavenComponentsToString(
+            tmp.group, tmp.artifact, tmp.version, tmp.classifier, tmp.extension
+        )
+    }
+
+    public static mavenComponentsToString(
+        group: string, artifact: string, version: string, classifier?: string, extension = 'jar'
+    ): string {
+        return `${group.replace(/\./g, '/')}/${artifact}/${version}/${artifact}-${version}${classifier != null ? `-${classifier}` : ''}.${extension}`
+    }
+
+    public static mavenIdentifierToUrl(id: string, extension = 'jar'): URL {
+        return new URL(MavenUtil.mavenIdentifierToString(id, extension))
+    }
+
+    public static mavenComponentsToUrl(
+        group: string, artifact: string, version: string, classifier?: string, extension = 'jar'
+    ): URL {
+        return new URL(MavenUtil.mavenComponentsToString(group, artifact, version, classifier, extension))
+    }
+
+    public static mavenIdentifierToPath(id: string, extension = 'jar'): string {
+        return normalize(MavenUtil.mavenIdentifierToString(id, extension))
+    }
+
+    public static mavenComponentsToPath(
+        group: string, artifact: string, version: string, classifier?: string, extension = 'jar'
+    ): string {
+        return normalize(MavenUtil.mavenComponentsToString(group, artifact, version, classifier, extension))
+    }
+
+}