From 3ee3dd5c4b7a9948e2e15fc1cca8266e9e775f12 Mon Sep 17 00:00:00 2001
From: Wirawan Purwanto <wirawan0@gmail.com>
Date: Tue, 19 Aug 2014 11:07:39 -0400
Subject: [PATCH] * Module wpylib.file.tmpdir: defines a script-wide temporary
 directory.

---
 file/tmpdir.py | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 file/tmpdir.py

diff --git a/file/tmpdir.py b/file/tmpdir.py
new file mode 100644
index 0000000..7ccc97b
--- /dev/null
+++ b/file/tmpdir.py
@@ -0,0 +1,74 @@
+#
+# wpylib.file.tmpdir module
+# Utility for creating a script-wide temporary directory.
+#
+# Wirawan Purwanto
+# Created: 20140802
+#
+"""
+wpylib.file.tmpdir
+Utility for creating a script-wide temporary directory.
+
+This module is part of wpylib project.
+
+The temporary directory (tempdir) is created only once when
+the main function, tmpdir(), is called.
+This tempdir is supposed to be used as the root directory
+for all other temporary files throughout the lifetime of the script.
+When this script exists, the tempdir will be deleted with all
+the files/subdirs therein with a forced `rm -rf' invocation.
+
+The tmpdir routine has a fairly standard set of sequence of root dir
+candidates.
+User-defined roots can also be added (taking precedence over standard set)
+via TMPDIR_ROOTS list.
+But this must be added before the first tmpdir() function call.
+
+
+"""
+
+import os
+import os.path
+import tempfile
+
+from warnings import warn
+from wpylib import shell_utils as sh
+
+_g = globals()
+_g.setdefault("TMPDIR", None)
+_g.setdefault("TMPDIR_CLEANUP", True)
+_g.setdefault("TMPDIR_ROOTS", [])
+del _g
+
+
+def tmpdir():
+  """Main function to create a temporary directory (when first called)
+  and return the created temporary directory name.
+  For subsequent calls, the same temporary directory name is given again.
+  """
+  import atexit
+  global TMPDIR, TMPDIR_ROOTS
+  if TMPDIR != None: return TMPDIR
+  tmproot = None
+  # FIXME: site-specific hooks probably need to be set somewhere
+  for d in list(TMPDIR_ROOTS) + [ os.getenv("TMP"), os.getenv("TMPDIR"), "/tmp", "/var/tmp" ]:
+    if d != None and os.path.isdir(d) and :
+      tmproot = d
+      break
+  if not tmproot:
+    warn("Cannot find suitable temporary directory root, using current directory.",
+         RuntimeWarning)
+    tmproot = os.getcwd()
+  TMPDIR = tempfile.mkdtemp(prefix=("%s/chkgit-%d" % (tmproot, os.getpid())))
+
+  def tmpdir_exitfunc():
+    global TMPDIR
+    global TMPDIR_CLEANUP
+    if TMPDIR != None and os.path.isdir(TMPDIR) and TMPDIR_CLEANUP:
+      try:
+        sh.rm("-rf", TMPDIR)
+      except:
+        warn("Failed to remove temporary directory %s" % TMPDIR)
+  atexit.register(tmpdir_exitfunc)
+
+  return TMPDIR