Polish build_version.

build_version.py

@@ -39,6 +39,7 @@ import sys
 from glob import glob
 from os.path import join as opj
 from subprocess import call, CalledProcessError, check_output
+from tempfile import TemporaryFile
 
 
 # constants
@@ -180,6 +181,7 @@ def build_pdf(doc):
 
     if not filename:
         print "\n\tNo latex file !\n"
+        os.chdir(cwd)
         return
 
     try:
@@ -188,6 +190,7 @@ def build_pdf(doc):
     except CalledProcessError:
         print "\n\tFailled to generate PDF file !"
         print "\tCheck LaTeX file in", latexdir, "\n"
+        os.chdir(cwd)
         return
 
     check_output(["pdflatex", filename])
@@ -684,7 +687,8 @@ def which(cmd, localhost=False):
     # local host
     if not ARGS.force_container or localhost:
         try:
-            out = check_output(["which", cmd])
+            with  TemporaryFile() as fi:
+                out = check_output(["which", cmd], stderr=fi)
             print "\n\tCommand", cmd, "found on the localhost"
             return [out.strip("\n")]