first commit

app_vue/node_modules/@vue/vue-loader-v15/lib/compiler.js

@@ -0,0 +1,54 @@
+// resolve compilers to use.
+
+let cached
+
+exports.resolveCompiler = function (ctx, loaderContext) {
+  if (cached) {
+    return cached
+  }
+
+  // check 2.7
+  try {
+    const pkg = loadFromContext('vue/package.json', ctx)
+    const [major, minor] = pkg.version.split('.')
+    if (major === '2' && Number(minor) >= 7) {
+      return (cached = {
+        is27: true,
+        compiler: loadFromContext('vue/compiler-sfc', ctx),
+        templateCompiler: undefined
+      })
+    }
+  } catch (e) {}
+
+  return (cached = {
+    compiler: require('@vue/component-compiler-utils'),
+    templateCompiler: loadTemplateCompiler(ctx, loaderContext)
+  })
+}
+
+function loadFromContext(path, ctx) {
+  return require(require.resolve(path, {
+    paths: [ctx]
+  }))
+}
+
+function loadTemplateCompiler(ctx, loaderContext) {
+  try {
+    return loadFromContext('vue-template-compiler', ctx)
+  } catch (e) {
+    if (loaderContext) {
+      if (/version mismatch/.test(e.toString())) {
+        loaderContext.emitError(e)
+      } else {
+        loaderContext.emitError(
+          new Error(
+            `[vue-loader] vue-template-compiler must be installed as a peer dependency, ` +
+              `or a compatible compiler implementation must be passed via options.`
+          )
+        )
+      }
+    } else {
+      throw e
+    }
+  }
+}