fix(help|edit): use npm.exec, use file:///

Windows no longer allows `file://`, but instead requires `file:///` for
local file urls.

Also after the command refactor things shifted and the tests didn't
catch that the help pages didn't work at all anymore, and that the
post-edit rebuild didn't work. This cleans up those two issues.

PR-URL: #3994
Credit: @wraithgar
Close: #3994
Reviewed-by: @lukekarrys

lib/base-command.js

@@ -1,4 +1,4 @@
-// Base class for npm.commands[cmd]
+// Base class for npm commands
 const usageUtil = require('./utils/usage.js')
 const ConfigDefinitions = require('./utils/config/definitions.js')
 const getWorkspaces = require('./workspaces/get-workspaces.js')

lib/commands/edit.js

@@ -50,12 +50,7 @@ class Edit extends BaseCommand {
         editor.on('exit', (code) => {
           if (code)
             return reject(new Error(`editor process exited with code: ${code}`))
-          this.npm.commands.rebuild([dir], (err) => {
-            if (err)
-              return reject(err)
-
-            resolve()
-          })
+          this.npm.exec('rebuild', [dir]).catch(reject).then(resolve)
         })
       })
     })

lib/commands/help-search.js

@@ -30,7 +30,7 @@ class HelpSearch extends BaseCommand {
     if (!args.length)
       return this.npm.output(this.usage)
 
-    const docPath = path.resolve(__dirname, '..', 'docs/content')
+    const docPath = path.resolve(__dirname, '..', '..', 'docs/content')
     const files = await glob(`${docPath}/*/*.md`)
     const data = await this.readFiles(files)
     const results = await this.searchFiles(args, data, files)

lib/commands/help.js

@@ -36,7 +36,7 @@ class Help extends BaseCommand {
   async completion (opts) {
     if (opts.conf.argv.remain.length > 2)
       return []
-    const g = path.resolve(__dirname, '../man/man[0-9]/*.[0-9]')
+    const g = path.resolve(__dirname, '../../man/man[0-9]/*.[0-9]')
     const files = await glob(g)
 
     return Object.keys(files.reduce(function (acc, file) {
@@ -66,7 +66,7 @@ class Help extends BaseCommand {
     // support `npm help package.json`
     section = section.replace('.json', '-json')
 
-    const manroot = path.resolve(__dirname, '..', 'man')
+    const manroot = path.resolve(__dirname, '..', '..', 'man')
     // find either section.n or npm-section.n
     const f = `${manroot}/${manSearch}/?(npm-)${section}.[0-9]*`
     let mans = await glob(f)
@@ -90,16 +90,7 @@ class Help extends BaseCommand {
   }
 
   helpSearch (args) {
-    return new Promise((resolve, reject) => {
-      this.npm.commands['help-search'](args, (err) => {
-        // This would only error if args was empty, which it never is
-        /* istanbul ignore next */
-        if (err)
-          return reject(err)
-
-        resolve()
-      })
-    })
+    return this.npm.exec('help-search', args)
   }
 
   async viewMan (man) {
@@ -157,7 +148,7 @@ class Help extends BaseCommand {
         sect = 'using-npm'
         break
     }
-    return 'file://' + path.resolve(__dirname, '..', 'docs', 'output', sect, f + '.html')
+    return 'file:///' + path.resolve(__dirname, '..', '..', 'docs', 'output', sect, f + '.html')
   }
 }
 module.exports = Help

test/lib/commands/edit.js

@@ -29,11 +29,10 @@ const npm = {
     get: () => EDITOR,
   },
   dir: resolve(__dirname, '../../../node_modules'),
-  commands: {
-    rebuild: (args, cb) => {
-      rebuildArgs = args
-      return cb(rebuildFail)
-    },
+  exec: async (cmd, args) => {
+    rebuildArgs = args
+    if (rebuildFail)
+      throw rebuildFail
   },
 }
 

test/lib/commands/help-search.js

@@ -19,10 +19,9 @@ const npm = mockNpm({
     long: false,
   },
   usage: 'npm test usage',
-  commands: {
-    help: (args, cb) => {
-      return cb(npmHelpErr)
-    },
+  exec: async () => {
+    if (npmHelpErr)
+      throw npmHelpErr
   },
   output,
 })

test/lib/commands/help.js

@@ -20,14 +20,11 @@ const npm = {
       cooked: [],
     },
   },
-  commands: {
-    'help-search': (args, cb) => {
+  exec: async (cmd, args) => {
+    if (cmd === 'help-search')
       helpSearchArgs = args
-      return cb()
-    },
-    help: {
-      usage: 'npm help <term>',
-    },
+    else if (cmd === 'help')
+      return { usage: 'npm help <term>' }
   },
   deref: (cmd) => {},
   output: msg => {
@@ -162,6 +159,7 @@ t.test('npm help 1 install', async t => {
   await help.exec(['1', 'install'])
 
   t.match(openUrlArg, /commands(\/|\\)npm-install.html$/, 'attempts to open the correct url')
+  t.ok(openUrlArg.startsWith('file:///'), 'opens with the correct uri schema')
 })
 
 t.test('npm help 5 install', async t => {