Support name and source flags for installation

src/install.ts

@@ -33,6 +33,8 @@ export interface InstallDependencyOptions {
   savePeer?: boolean
   global?: boolean
   cwd: string
+  name?: string
+  source?: string
   emitter?: Emitter
 }
 
@@ -145,7 +147,7 @@ export function installDependencyRaw (raw: string, options: InstallDependencyOpt
  */
 export function installDependenciesRaw (raw: string[], options: InstallDependencyOptions): Promise<InstallResult[]> {
   return new Promise(resolve => {
-    const expressions = raw.map(x => parseDependencyExpression(x))
+    const expressions = raw.map(x => parseDependencyExpression(x, options))
 
     return resolve(installDependencies(expressions, options))
   })

src/lib/compile.ts

@@ -494,7 +494,8 @@ function stringifySourceFile (sourceFile: ts.SourceFile, options: StringifyOptio
     if (isExternal) {
       throw new TypingsError(
         `Attempted to compile "${name}" as a global ` +
-        `module, but it looks like an external module.`
+        `module, but it looks like an external module. ` +
+        `Did you want to enable the global flag?`
       )
     }
 
@@ -503,7 +504,8 @@ function stringifySourceFile (sourceFile: ts.SourceFile, options: StringifyOptio
     if (!isExternal && !(parentModule && parentModule.isExternal)) {
       throw new TypingsError(
         `Attempted to compile "${name}" as an external module, ` +
-        `but it looks like a global module.`
+        `but it looks like a global module.` +
+        `Did you want to remove the global flag?`
       )
     }
   }

src/lib/dependencies.ts

@@ -111,8 +111,9 @@ function resolveDependencyRegistry (dependency: Dependency, options: Options) {
         // Wrap 404 responses in user prompt.
         if (error.code === 'EINVALIDSTATUS' && error.status === 404) {
           const message = `Unable to find "${meta.name}" ("${meta.source}") in the registry. ` +
-            `Did you want to try searching another source? ` +
-            `Also, if you want contribute these typings, please help us: ` +
+            'There are other sources available though. Would you like to try ' +
+            'searching for other available sources and return? You are also ' +
+            `welcome to help contribute these typings to the registry: ` +
             `https://github.com/typings/registry`
 
           return Promise.reject(new TypingsError(message, error))

src/utils/parse.ts

@@ -223,17 +223,23 @@ export function resolveDependency (raw: string, filename: string) {
   throw new TypeError(`Unable to resolve dependency from "${raw}"`)
 }
 
+/**
+ * Options to use when parsing a dependency string.
+ */
+export interface ParseDependencyOptions {
+  name?: string
+  source?: string
+}
+
 /**
  * Parse and expand the CLI dependency expression.
  */
-export function parseDependencyExpression (raw: string) {
+export function parseDependencyExpression (raw: string, options?: ParseDependencyOptions) {
   const [, name, scheme, registry] = /^(?:([^=!:#]+)=)?(?:([\w]+\:.+)|((?:[\w]+\~)?.+))$/.exec(raw)
 
-  const location = scheme || expandRegistry(registry)
-
   return {
-    name,
-    location
+    name: name || options.name,
+    location: scheme || expandRegistry(registry)
   }
 }
 
@@ -265,13 +271,13 @@ export function buildDependencyExpression (type: string, meta: DependencyMeta):
 /**
  * Parse the registry dependency string.
  */
-export function expandRegistry (raw: string) {
+export function expandRegistry (raw: string, options: ParseDependencyOptions = {}) {
   if (typeof raw !== 'string') {
     throw new TypeError(`Expected registry name to be a string, not ${typeof raw}`)
   }
 
   const indexOf = raw.indexOf('~')
-  let source = rc.defaultSource
+  let source = options.source || rc.defaultSource
   let name: string
 
   if (indexOf === -1) {