When user pass an unknown command, try to suggest commands that are c…

…lose

packages/cli/package.json

@@ -47,6 +47,7 @@
     "chalk": "^2.3.0",
     "cli-table": "^0.3.1",
     "commander": "^2.17.1",
+    "fuzzaldrin": "^2.1.0",
     "gettext-parser": "^2.0.0",
     "glob": "^7.1.2",
     "inquirer": "^6.2.0",

packages/cli/src/api/utils.js

@@ -1,6 +1,7 @@
 import fs from "fs"
 import path from "path"
 import chalk from "chalk"
+import { score } from "fuzzaldrin"
 
 export function removeDirectory(dir, keep = false) {
   if (!fs.existsSync(dir)) return
@@ -32,3 +33,27 @@ export function prettyOrigin(origins) {
     return ""
   }
 }
+
+export function fuzzValidateCommand(candidates = [], queries = []) {
+  const candidateNames = candidates.map(candidate => candidate.name())
+  for (let query of queries) {
+    if (!candidateNames.includes(query)) {
+      const commandScores = candidateNames
+        .map(name => ({
+          name: name,
+          score: score(name, query.slice(0, name.length))
+        }))
+        .filter(nameScore => nameScore.score > 0)
+      return `lingui: ${query} is unknown
+  ${
+    commandScores.length
+      ? `Do you mean: ${commandScores
+          .slice(0, 3)
+          .map(commandScore => chalk.inverse(commandScore.name))
+          .join(", ")} ?`
+      : ""
+  }`
+    }
+  }
+  return ""
+}

packages/cli/src/lingui.js

@@ -1,5 +1,7 @@
 #!/usr/bin/env node
 
+import { fuzzValidateCommand } from "./api/utils"
+
 const program = require("commander")
 
 let version
@@ -19,3 +21,5 @@ program
   .command("extract [files...]", "Extracts messages from source files")
   .command("compile", "Compile message catalogs")
   .parse(process.argv)
+
+console.log(fuzzValidateCommand(program.commands, program.args))

yarn.lock

@@ -2725,6 +2725,10 @@ functional-red-black-tree@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
 
+fuzzaldrin@^2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/fuzzaldrin/-/fuzzaldrin-2.1.0.tgz#90204c3e2fdaa6941bb28d16645d418063a90e9b"
+
 gauge@~2.7.3:
   version "2.7.4"
   resolved "https://registry.yarnpkg.com/gauge/-/gauge-2.7.4.tgz#2c03405c7538c39d7eb37b317022e325fb018bf7"