tools: sync gyp code base with node-gyp repo

PR-URL: #30563
Reviewed-By: Ujjwal Sharma <ryzokuken@disroot.org>
Reviewed-By: Christian Clauss <cclauss@me.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: targos

tools/gyp/DEPS

@@ -6,10 +6,44 @@
 
 importos
 importsys
+importsubprocess
+
+PY3=bytes!=str
+
+# Below IsCygwin() function copied from pylib/gyp/common.py
+defIsCygwin():
+try:
+out=subprocess.Popen("uname",
+stdout=subprocess.PIPE,
+stderr=subprocess.STDOUT)
+stdout, stderr=out.communicate()
+ifPY3:
+stdout=stdout.decode("utf-8")
+return"CYGWIN"instr(stdout)
+exceptException:
+returnFalse
+
+
+defUnixifyPath(path):
+try:
+ifnotIsCygwin():
+returnpath
+out=subprocess.Popen(["cygpath", "-u", path],
+stdout=subprocess.PIPE,
+stderr=subprocess.STDOUT)
+stdout, _=out.communicate()
+ifPY3:
+stdout=stdout.decode("utf-8")
+returnstr(stdout)
+exceptException:
+returnpath
+
 
 # Make sure we're using the version of pylib in this repo, not one installed
-# elsewhere on the system.
-sys.path.insert(0, os.path.join(os.path.dirname(sys.argv[0]), 'pylib'))
+# elsewhere on the system. Also convert to Unix style path on Cygwin systems,
+# else the 'gyp' library will not be found
+path=UnixifyPath(sys.argv[0])
+sys.path.insert(0, os.path.join(os.path.dirname(path), 'pylib'))
 importgyp
 
 if__name__=='__main__':