lib: restore python 2.6 in semverRange for v5.x

.travis.yml

@@ -31,33 +31,33 @@ matrix:
 
     - name: "Node.js 6 & Python 3.7 on Linux"
       python: 3.7
-      env: NODE_GYP_FORCE_PYTHON=python3 EXPERIMENTAL_NODE_GYP_PYTHON3=1
+      env: NODE_GYP_FORCE_PYTHON=python3
       before_install: nvm install 6
     - name: "Node.js 8 & Python 3.7 on Linux"
       python: 3.7
-      env: NODE_GYP_FORCE_PYTHON=python3 EXPERIMENTAL_NODE_GYP_PYTHON3=1
+      env: NODE_GYP_FORCE_PYTHON=python3
       before_install: nvm install 8
     - name: "Node.js 10 & Python 3.7 on Linux"
       python: 3.7
-      env: NODE_GYP_FORCE_PYTHON=python3 EXPERIMENTAL_NODE_GYP_PYTHON3=1
+      env: NODE_GYP_FORCE_PYTHON=python3
       before_install: nvm install 10
     - name: "Node.js 12 & Python 3.5 on Linux"
       python: 3.5
-      env: NODE_GYP_FORCE_PYTHON=python3 EXPERIMENTAL_NODE_GYP_PYTHON3=1
+      env: NODE_GYP_FORCE_PYTHON=python3
       before_install: nvm install 12
     - name: "Node.js 12 & Python 3.6 on Linux"
       python: 3.6
-      env: NODE_GYP_FORCE_PYTHON=python3 EXPERIMENTAL_NODE_GYP_PYTHON3=1
+      env: NODE_GYP_FORCE_PYTHON=python3
       before_install: nvm install 12
     - name: "Node.js 12 & Python 3.7 on Linux"
       python: 3.7
-      env: NODE_GYP_FORCE_PYTHON=python3 EXPERIMENTAL_NODE_GYP_PYTHON3=1
+      env: NODE_GYP_FORCE_PYTHON=python3
       before_install: nvm install 12
     - name: "Python 3.7 on macOS"
       os: osx
       #osx_image: xcode11
       language: shell  # 'language: python' is not yet supported on macOS
-      env: NODE_GYP_FORCE_PYTHON=python3 EXPERIMENTAL_NODE_GYP_PYTHON3=1
+      env: NODE_GYP_FORCE_PYTHON=python3
       before_install: HOMEBREW_NO_AUTO_UPDATE=1 brew install npm
     - name: "Node.js 12 & Python 3.7 on Windows"
       os: windows
@@ -66,7 +66,6 @@ matrix:
       env: >-
         PATH=/c/Python37:/c/Python37/Scripts:$PATH
         NODE_GYP_FORCE_PYTHON=/c/Python37/python.exe
-        EXPERIMENTAL_NODE_GYP_PYTHON3=1
       before_install: choco install python
 
 install:
@@ -79,6 +78,7 @@ before_script:
   # exit-zero treats all errors as warnings.  Two space indentation is OK.  The GitHub editor is 127 chars wide
   - flake8 . --count --exit-zero --ignore=E111,E114,W503 --max-complexity=10 --max-line-length=127 --statistics
   - npm install
+  - npm list
 script:
   - node -e 'require("npmlog").level="verbose"; require("./lib/find-python")(null,()=>{})'
   - npm test

gyp/pylib/gyp/MSVSNew.py

@@ -59,6 +59,9 @@ def __cmp__(self, other):
     # Sort by name then guid (so things are in order on vs2008).
     return cmp((self.name, self.get_guid()), (other.name, other.get_guid()))
 
+  def __lt__(self, other):
+    return self.__cmp__(other) < 0
+
 
 class MSVSFolder(MSVSSolutionEntry):
   """Folder in a Visual Studio project or solution."""

lib/find-python.js

@@ -18,8 +18,7 @@ PythonFinder.prototype = {
   log: logWithPrefix(log, 'find Python'),
   argsExecutable: ['-c', 'import sys; print(sys.executable);'],
   argsVersion: ['-c', 'import sys; print("%s.%s.%s" % sys.version_info[:3]);'],
-  semverRange: process.env.EXPERIMENTAL_NODE_GYP_PYTHON3 ? '2.7.x || >=3.5.0'
-    : '>=2.6.0 <3.0.0',
+  semverRange: '^2.6.0 || >=3.5.0',
 
   // These can be overridden for testing:
   execFile: cp.execFile,
@@ -97,6 +96,11 @@ PythonFinder.prototype = {
           before: () => { this.addLog('checking if "python2" can be used') },
           check: this.checkCommand,
           arg: 'python2'
+        },
+        {
+          before: () => { this.addLog('checking if "python3" can be used') },
+          check: this.checkCommand,
+          arg: 'python3'
         }
       ]
 
@@ -286,7 +290,7 @@ PythonFinder.prototype = {
     //                                                           X
     const info = [
       '**********************************************************',
-      'You need to install the latest version of Python 2.7.',
+      'You need to install the latest version of Python.',
       'Node-gyp should be able to find and use Python. If not,',
       'you can try one of the following options:',
       `- Use the switch --python="${pathExample}"`,

lib/find-visualstudio.js

@@ -279,15 +279,22 @@ VisualStudioFinder.prototype = {
   // Helper - process toolset information
   getToolset: function getToolset (info, versionYear) {
     const pkg = 'Microsoft.VisualStudio.Component.VC.Tools.x86.x64'
+    const express = 'Microsoft.VisualStudio.WDExpress'
+
     if (info.packages.indexOf(pkg) !== -1) {
       this.log.silly('- found VC.Tools.x86.x64')
-      if (versionYear === 2017) {
-        return 'v141'
-      }
-      if (versionYear === 2019) {
-        return 'v142'
-      }
+    } else if (info.packages.indexOf(express) !== -1) {
+      this.log.silly('- found Visual Studio Express (looking for toolset)')
+    } else {
+      return null
+    }
+
+    if (versionYear === 2017) {
+      return 'v141'
+    } else if (versionYear === 2019) {
+      return 'v142'
     }
+    this.log.silly('- invalid versionYear:', versionYear)
     return null
   },