lib: drop python 2 support

Author: DeeDeeG

lib/find-python.js

@@ -9,6 +9,23 @@ const extend = require('util')._extend // eslint-disable-line
 const win = process.platform === 'win32'
 const logWithPrefix = require('./util').logWithPrefix
 
+const systemDrive = process.env.SystemDrive || 'C:'
+const username = process.env.USERNAME || process.env.USER || require('os').userInfo().username
+const localAppData = process.env.LOCALAPPDATA || `${systemDrive}\\${username}\\AppData\\Local`
+const programFiles = process.env.ProgramW6432 || process.env.ProgramFiles || `${systemDrive}\\Program Files`
+const programFilesX86 = process.env['ProgramFiles(x86)'] || `${programFiles} (x86)`
+
+const winDefaultLocationsArray = []
+for (const majorMinor of ['39', '38', '37', '36']) {
+  winDefaultLocationsArray.push(
+    `${localAppData}\\Programs\\Python\\Python${majorMinor}\\python.exe`,
+    `${programFiles}\\Python${majorMinor}\\python.exe`,
+    `${localAppData}\\Programs\\Python\\Python${majorMinor}-32\\python.exe`,
+    `${programFiles}\\Python${majorMinor}-32\\python.exe`,
+    `${programFilesX86}\\Python${majorMinor}-32\\python.exe`
+  )
+}
+
 //! after editing file don't forget run "npm test" and
 //! change tests for this file if needed
 
@@ -70,17 +87,14 @@ class PythonFinder {
       // for testing
       // 'print("2.1.1")'
     ]
-    this.semverRange = '2.7.x || >=3.5.0'
+    this.semverRange = '>=3.6.0'
 
     // These can be overridden for testing:
     this.execFile = cp.execFile
     this.env = process.env
     this.win = win
     this.pyLauncher = 'py.exe'
-    this.winDefaultLocations = [
-      path.join(process.env.SystemDrive || 'C:', 'Python37', 'python.exe'),
-      path.join(process.env.SystemDrive || 'C:', 'Python27', 'python.exe')
-    ]
+    this.winDefaultLocations = winDefaultLocationsArray
   }
 
   /**
@@ -200,11 +214,6 @@ class PythonFinder {
         checkFunc: this.checkCommand,
         name: 'python',
         arg: 'python'
-      },
-      {
-        checkFunc: this.checkCommand,
-        name: 'python2',
-        arg: 'python2'
       }
     ]
 
@@ -227,7 +236,7 @@ class PythonFinder {
             `checking if the ${colorizeOutput(
               GREEN,
               'py launcher'
-            )} can be used to find Python`
+            )} can be used to find Python 3`
           )
         },
         checkFunc: this.checkPyLauncher,
@@ -620,7 +629,7 @@ function findPython (configPython, callback) {
 /* findPython(null, (err, found) => {
   console.log('found:', '\x1b[31m', found)
   console.log('\x1b[0m')
-}) 
+})
 */
 module.exports = findPython
 module.exports.test = {