Handle symlinks graciously

[git.git] / gitMergeCommon.py

diff --git a/gitMergeCommon.py b/gitMergeCommon.py
index dfa49ff..ff6f58a 100644 (file)
--- a/gitMergeCommon.py
+++ b/gitMergeCommon.py
@@ -1,12 +1,19 @@
+#
+# Copyright (C) 2005 Fredrik Kuivinen
+#
+
 import sys, re, os, traceback
 from sets import Set
 
-if sys.version_info[0] < 2 or \
-       (sys.version_info[0] == 2 and sys.version_info[1] < 4):
-    print 'Python version 2.4 required, found', \
-          str(sys.version_info[0])+'.'+str(sys.version_info[1])+'.'+ \
-          str(sys.version_info[2])
-    sys.exit(1)
+def die(*args):
+    printList(args, sys.stderr)
+    sys.exit(2)
+
+def printList(list, file=sys.stdout):
+    for x in list:
+        file.write(str(x))
+        file.write(' ')
+    file.write('\n')
 
 import subprocess
 
@@ -28,12 +35,6 @@ def debug(*args):
         if funcName in functionsToDebug:
             printList(args)
 
-def printList(list):
-    for x in list:
-        sys.stdout.write(str(x))
-        sys.stdout.write(' ')
-    sys.stdout.write('\n')
-
 # Program execution
 # -----------------
 
@@ -42,6 +43,9 @@ class ProgramError(Exception):
         self.progStr = progStr
         self.error = error
 
+    def __str__(self):
+        return self.progStr + ': ' + self.error
+
 addDebug('runProgram')
 def runProgram(prog, input=None, returnCode=False, env=None, pipeOutput=True):
     debug('runProgram prog:', str(prog), 'input:', str(input))
@@ -213,7 +217,7 @@ def buildGraph(heads):
 
 # Write the empty tree to the object database and return its SHA1
 def writeEmptyTree():
-    tmpIndex = os.environ['GIT_DIR'] + '/merge-tmp-index'
+    tmpIndex = os.environ.get('GIT_DIR', '.git') + '/merge-tmp-index'
     def delTmpIndex():
         try:
             os.unlink(tmpIndex)