Pythonize ccd_defs_check and hook

Former-commit-id: aeb2b243b1

ccd_defs_check.py

@@ -0,0 +1,25 @@
+#!/usr/bin/python
+import sys
+import os
+import json
+
+BIN_PATH_ABS = os.path.abspath(os.path.dirname(os.path.abspath(__file__)))
+
+def get_ccd_widths():
+	"""Return the CCD Width of the camera listed in the JSON defs file."""
+	with open(BIN_PATH_ABS + '/data/ccd_defs.json') as jsonFile:
+		return json.load(jsonFile)
+
+try:
+	ccd_defs = get_ccd_widths()
+	print "CCD_DEFS compiles OK"
+	print "Definitions in file: {0}".format(len(ccd_defs))
+	exit_code=0
+except IOError as e:
+	print "I/O error with CCD_DEFS file: {0}".format(e.strerror)
+	exit_code=255
+except:
+	print "Error with CCD_DEFS file: {0}".format(sys.exc_info()[1])
+	exit_code=255
+
+sys.exit(exit_code)

hooks/pre-commit

@@ -10,13 +10,14 @@
 exec 1>&2
 
 echo "RUNNING PRE-COMMIT"
-
+EXIT_CODE=0
 # Get list of files about to be committed
 if git diff --cached --name-only --diff-filter=ACM | grep 'ccd_defs.json'; then
     echo "We changed ccd_defs.json"
     GIT_ROOT=$(git rev-parse --show-toplevel)
-    perl $GIT_ROOT/ccd_defs_check.pl
+    python $GIT_ROOT/ccd_defs_check.py
+    EXIT_CODE=$(echo $?)
 fi
 
 # non-zero exit fails the commit
-exit 0
+exit $EXIT_CODE