Significantly improve "Project Generator" // Resolve #280

platformio/util.py

@@ -376,3 +376,29 @@ def get_frameworks(type_=None):
         return frameworks[type_]
 
     return frameworks
+
+
+def where_is_program(program, envpath=None):
+    env = os.environ
+    if envpath:
+        env['PATH'] = envpath
+
+    # try OS's built-in commands
+    try:
+        result = exec_command(
+            ["where" if "windows" in get_systype() else "which", program],
+            env=env
+        )
+        if result['returncode'] == 0 and isfile(result['out'].strip()):
+            return result['out'].strip()
+    except OSError:
+        pass
+
+    # look up in $PATH
+    for bin_dir in env.get("PATH", "").split(os.pathsep):
+        if isfile(join(bin_dir, program)):
+            return join(bin_dir, program)
+        elif isfile(join(bin_dir, "%s.exe" % program)):
+            return join(bin_dir, "%s.exe" % program)
+
+    return program