Eliminate bashism

'>&' is apparently a bashism, change '>& /dev/null' to '2>&1 > /dev/null'.

Problem reported by KatolaZ <katolaz@freaknet.org>.

Resolves #99 and closes #100.

README.md

@@ -12,6 +12,18 @@ copies some code from the mercurial sources.
 
 The current maintainer is Frej Drejhammar <frej.drejhammar@gmail.com>.
 
+Support
+-------
+
+If you have problems with hg-fast-export or have found a bug, please
+create an issue at the [github issue tracker]
+(https://github.com/frej/fast-export/issues). Before creating a new
+issue, check that your problem has not already been addressed in an
+already closed issue. Do not contact the maintainer directly unless
+you want to report a security bug. That way the next person having the
+same problem can benefit from the time spent solving the problem the
+first time.
+
 Usage
 -----
 

hg-fast-export.py

@@ -158,6 +158,7 @@ def sanitize_name(name,what="branch", mapping={}):
   # work to do manually, write a tool that does it for you.
 
   def dot(name):
+    if not name: return name
     if name[0] == '.': return '_'+name[1:]
     return name
 

hg-fast-export.sh

@@ -3,7 +3,22 @@
 # Copyright (c) 2007, 2008 Rocco Rutte <pdmef@gmx.net> and others.
 # License: MIT <http://www.opensource.org/licenses/mit-license.php>
 
-ROOT="$(dirname "$(which "$0")")"
+READLINK="readlink"
+if command -v greadlink > /dev/null; then
+  READLINK="greadlink" # Prefer greadlink over readlink
+fi
+
+if ! $READLINK -f "$(which "$0")" 2>&1 > /dev/null; then
+    ROOT="$(dirname "$(which "$0")")"
+    if [ ! -f "$ROOT/hg-fast-export.py" ] ; then
+	echo "hg-fast-exports requires a readlink implementation which knows" \
+	     " how to canonicalize paths in order to be called via a symlink."
+	exit 1
+    fi
+else
+    ROOT="$(dirname "$($READLINK -f "$(which "$0")")")"
+fi
+
 REPO=""
 PFX="hg2git"
 SFX_MAPPING="mapping"
@@ -49,9 +64,23 @@ case "$1" in
       exit 0
 esac
 
-cd $(git rev-parse --show-toplevel) \
+IS_BARE=$(git rev-parse --is-bare-repository) \
     || (echo "Could not find git repo" ; exit 1)
-GIT_DIR=$(git rev-parse --git-dir) || exit 1
+if test "z$IS_BARE" != ztrue; then
+   # This is not a bare repo, cd to the toplevel
+   TOPLEVEL=$(git rev-parse --show-toplevel) \
+       || (echo "Could not find git repo toplevel" ; exit 1)
+   cd $TOPLEVEL || exit 1
+fi
+GIT_DIR=$(git rev-parse --git-dir) || (echo "Could not find git repo" ; exit 1)
+
+
+IGNORECASEWARN=""
+IGNORECASE=`git config core.ignoreCase`
+if [ "true" = "$IGNORECASE" ]; then
+    IGNORECASEWARN="true"
+fi;
+
 
 while case "$#" in 0) break ;; esac
 do
@@ -66,6 +95,7 @@ do
     --force)
       # pass --force to git-fast-import and hg-fast-export.py
       GFI_OPTS="$GFI_OPTS --force"
+      IGNORECASEWARN="";
       break
       ;;
     -*)
@@ -79,6 +109,22 @@ do
   shift
 done
 
+if [ ! -z "$IGNORECASEWARN" ]; then
+    echo "Error: The option core.ignoreCase is set to true in the git"
+    echo "repository. This will produce empty changesets for renames that just"
+    echo "change the case of the file name."
+    echo "Use --force to skip this check or change the option with"
+    echo "git config core.ignoreCase false"
+    exit 1
+fi;
+
+# Make a backup copy of each state file
+for i in $SFX_STATE $SFX_MARKS $SFX_MAPPING $SFX_HEADS ; do
+    if [ -f "$GIT_DIR/$PFX-$i" ] ; then
+	cp "$GIT_DIR/$PFX-$i" "$GIT_DIR/$PFX-$i~"
+    fi
+done
+
 # for convenience: get default repo from state file
 if [ x"$REPO" = x -a -f "$GIT_DIR/$PFX-$SFX_STATE" ] ; then
   REPO="`grep '^:repo ' "$GIT_DIR/$PFX-$SFX_STATE" | cut -d ' ' -f 2`"

hg-reset.sh

@@ -24,9 +24,15 @@ Options:
 	-r	Mercurial repository to use
 "
 
-cd $(git rev-parse --show-toplevel) \
+IS_BARE=$(git rev-parse --is-bare-repository) \
     || (echo "Could not find git repo" ; exit 1)
-GIT_DIR=$(git rev-parse --git-dir) || exit 1
+if test "z$IS_BARE" != ztrue; then
+   # This is not a bare repo, cd to the toplevel
+   TOPLEVEL=$(git rev-parse --show-toplevel) \
+       || (echo "Could not find git repo toplevel" ; exit 1)
+   cd $TOPLEVEL || exit 1
+fi
+GIT_DIR=$(git rev-parse --git-dir) || (echo "Could not find git repo" ; exit 1)
 
 while case "$#" in 0) break ;; esac
 do