#!/bin/sh
 
 # This program is licensed under the GNU GPL version 2 or later.
-# (c) Richard "RichiH" Hartmann <richih@debian.org>, 2011-2013
+# (c) Richard "RichiH" Hartmann <richih@debian.org>, 2011-2014
 # For details, see LICENSE. To submit patches, you have to agree to
 # license your code under the GNU GPL version 2 or later.
 
 # If '.git-HEAD' is appended to the version, you are seeing an unreleased
 # version of vcsh; the master branch is supposed to be clean at all times
 # so you can most likely just use it nonetheless
-VERSION='1.20131229.git-HEAD'
+VERSION='1.20140313'
 SELF=$(basename $0)
 
 fatal() {
 
 # Read defaults
 : ${VCSH_REPO_D:=$XDG_CONFIG_HOME/vcsh/repo.d}
-: ${VCSH_HOOK_D:=$XDH_CONFIG_HOME/vcsh/hooks-enabled}
+: ${VCSH_HOOK_D:=$XDG_CONFIG_HOME/vcsh/hooks-enabled}
 : ${VCSH_BASE:=$HOME}
 : ${VCSH_GITIGNORE:=exact}
+: ${VCSH_GITATTRIBUTES:=none}
 : ${VCSH_WORKTREE:=absolute}
 
 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
                exit
        fi
        git fetch
-       for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
+       hook pre-merge
+       git ls-tree -r --name-only origin/master | (while read object; do
                [ -e "$object" ] &&
                        error "'$object' exists." &&
                        VCSH_CONFLICT=1
        done
-       [ "$VCSH_CONFLICT" = '1' ] &&
+       [ "$VCSH_CONFLICT" = '1' ]) &&
                fatal "will stop after fetching and not try to merge!
   Once this situation has been resolved, run 'vcsh run $VCSH_REPO_NAME git pull' to finish cloning." 17
        git merge origin/master
+       hook post-merge
        hook post-clone
        retire
        hook post-clone-retired
                export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
                use
                git commit --untracked-files=no --quiet
+               VCSH_COMMAND_RETURN_CODE=$?
                echo
        done
        hook post-commit
        [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
        mkdir -p "$VCSH_BASE" || fatal "could not create '$VCSH_BASE'" 50
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
-       git init
+       git init --shared=0600
        upgrade
        hook post-init
 }
                export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
                use
                git pull
+               VCSH_COMMAND_RETURN_CODE=$?
                echo
        done
        hook post-pull
                export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
                use
                git push
+               VCSH_COMMAND_RETURN_CODE=$?
                echo
        done
        hook post-push
        hook pre-run
        use
        "$@"
+       VCSH_COMMAND_RETURN_CODE=$?
        hook post-run
 }
 
                export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
                use
                git status --short --untracked-files='no'
+               VCSH_COMMAND_RETURN_CODE=$?
        else
                for VCSH_REPO_NAME in $(list); do
                        echo "$VCSH_REPO_NAME:"
                        export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
                        use
                        git status --short --untracked-files='no'
+                       VCSH_COMMAND_RETURN_CODE=$?
                        echo
                done
        fi
                git config core.worktree "$VCSH_BASE"
        fi
        [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
-       git config vcsh.vcsh         'true'
+       [ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && git config core.attributesfile ".gitattributes.d/$VCSH_REPO_NAME"
+       git config vcsh.vcsh 'true'
        use
        [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
+       [ -e "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitattributes.d/$VCSH_REPO_NAME"
        hook post-upgrade
 }
 
 
        use
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
+       OLDIFS="$IFS"
+       IFS=$(printf '\n\t')
        gitignores=$(for file in $(git ls-files); do
                while true; do
                        echo $file; new="${file%/*}"
                        { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
                fi
        done
+       IFS="$OLDIFS"
        if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
                rm -f "$tempfile" || error "could not delete '$tempfile'"
                exit
                fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
 }
 
-debug `git version`
+debug $(git version)
 
 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
        fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
 
 check_dir "$VCSH_REPO_D"
 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
+[ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && check_dir "$VCSH_BASE/.gitattributes.d"
 
 verbose "$VCSH_COMMAND begin"
 export VCSH_COMMAND=$(echo $VCSH_COMMAND | sed 's/-/_/g')
 $VCSH_COMMAND "$@"
 hook post-command
 verbose "$VCSH_COMMAND end, exiting"
+exit $VCSH_COMMAND_RETURN_CODE