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Merge branch 'feature--overlay_functions'
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index 029a2b26fa078220f2039030485d121de0e2a3fc..53ce905c3a7c62abfbbfcb71e89c38b3b143bc1b 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # This program is licensed under the GNU GPL version 2 or later.
 #!/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.
 
 # For details, see LICENSE. To submit patches, you have to agree to
 # license your code under the GNU GPL version 2 or later.
 
@@ -19,11 +19,12 @@
 # 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
 # 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='1.20141009'
 SELF=$(basename $0)
 
 fatal() {
        echo "$SELF: fatal: $1" >&2
 SELF=$(basename $0)
 
 fatal() {
        echo "$SELF: fatal: $1" >&2
+       [ -z $2] && exit 1
        exit $2
 }
 
        exit $2
 }
 
@@ -31,16 +32,16 @@ fatal() {
 # options that will modify our behaviour.
 # Commands are handled at the end of this script.
 while getopts "c:dv" flag; do
 # options that will modify our behaviour.
 # Commands are handled at the end of this script.
 while getopts "c:dv" flag; do
-       if [ "$1" = '-d' ] || [ "$1" = '--debug' ]; then
+       if [ x"$1" = x'-d' ] || [ x"$1" = x'--debug' ]; then
                set -vx
                VCSH_DEBUG=1
                echo "debug mode on"
                echo "$SELF $VERSION"
                set -vx
                VCSH_DEBUG=1
                echo "debug mode on"
                echo "$SELF $VERSION"
-       elif [ "$1" = '-v' ]; then
+       elif [ x"$1" = x'-v' ]; then
                VCSH_VERBOSE=1
                echo "verbose mode on"
                echo "$SELF $VERSION"
                VCSH_VERBOSE=1
                echo "verbose mode on"
                echo "$SELF $VERSION"
-       elif [ "$1" = '-c' ]; then
+       elif [ x"$1" = x'-c' ]; then
                VCSH_OPTION_CONFIG=$OPTARG
        fi
        shift 1
                VCSH_OPTION_CONFIG=$OPTARG
        fi
        shift 1
@@ -48,7 +49,7 @@ done
 
 source_all() {
        # Source file even if it's in $PWD and does not have any slashes in it
 
 source_all() {
        # Source file even if it's in $PWD and does not have any slashes in it
-       case "$1" in
+       case $1 in
                */*) . "$1";;
                *)   . "$PWD/$1";;
        esac;
                */*) . "$1";;
                *)   . "$PWD/$1";;
        esac;
@@ -57,7 +58,7 @@ source_all() {
 
 # Read configuration and set defaults if anything's not set
 [ -n "$VCSH_DEBUG" ]                  && set -vx
 
 # Read configuration and set defaults if anything's not set
 [ -n "$VCSH_DEBUG" ]                  && set -vx
-: ${XDG_CONFIG_HOME:=$HOME/.config}
+: ${XDG_CONFIG_HOME:="$HOME/.config"}
 
 # Read configuration files if there are any
 [ -r "/etc/vcsh/config" ]             && . "/etc/vcsh/config"
 
 # Read configuration files if there are any
 [ -r "/etc/vcsh/config" ]             && . "/etc/vcsh/config"
@@ -73,10 +74,12 @@ fi
 [ -n "$VCSH_DEBUG" ]                  && set -vx
 
 # Read defaults
 [ -n "$VCSH_DEBUG" ]                  && set -vx
 
 # Read defaults
-: ${VCSH_REPO_D:=$XDG_CONFIG_HOME/vcsh/repo.d}
-: ${VCSH_HOOK_D:=$XDG_CONFIG_HOME/vcsh/hooks-enabled}
-: ${VCSH_BASE:=$HOME}
+: ${VCSH_REPO_D:="$XDG_CONFIG_HOME/vcsh/repo.d"}
+: ${VCSH_HOOK_D:="$XDG_CONFIG_HOME/vcsh/hooks-enabled"}
+: ${VCSH_OVERLAY_D:="$XDG_CONFIG_HOME/vcsh/overlays-enabled"}
+: ${VCSH_BASE:="$HOME"}
 : ${VCSH_GITIGNORE:=exact}
 : ${VCSH_GITIGNORE:=exact}
+: ${VCSH_GITATTRIBUTES:=none}
 : ${VCSH_WORKTREE:=absolute}
 
 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
 : ${VCSH_WORKTREE:=absolute}
 
 if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
@@ -147,9 +150,10 @@ clone() {
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
        git config branch.master.merge  refs/heads/master
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
        git config branch.master.merge  refs/heads/master
-       if [ $(git ls-remote origin master 2> /dev/null | wc -l ) -lt 1 ]; then
-               info "remote is empty, not merging anything"
-               exit
+       VCSH_CLONE_ERROR=$(git ls-remote origin master 2>&1)
+       if [ -n "$VCSH_CLONE_ERROR" ]; then
+               rm -rf "$GIT_DIR"
+               fatal "$VCSH_CLONE_ERROR" 1
        fi
        git fetch
        hook pre-merge
        fi
        git fetch
        hook pre-merge
@@ -158,9 +162,9 @@ clone() {
                        error "'$object' exists." &&
                        VCSH_CONFLICT=1
        done
                        error "'$object' exists." &&
                        VCSH_CONFLICT=1
        done
-       [ "$VCSH_CONFLICT" = '1' ]) &&
+       [ x"$VCSH_CONFLICT" = x'1' ]) &&
                fatal "will stop after fetching and not try to merge!
                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
+  Once this situation has been resolved, run 'vcsh $VCSH_REPO_NAME pull' to finish cloning." 17
        git merge origin/master
        hook post-merge
        hook post-clone
        git merge origin/master
        hook post-merge
        hook post-clone
@@ -172,7 +176,7 @@ commit() {
        hook pre-commit
        for VCSH_REPO_NAME in $(list); do
                echo "$VCSH_REPO_NAME: "
        hook pre-commit
        for VCSH_REPO_NAME in $(list); do
                echo "$VCSH_REPO_NAME: "
-               export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+               GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
                use
                git commit --untracked-files=no --quiet
                VCSH_COMMAND_RETURN_CODE=$?
                use
                git commit --untracked-files=no --quiet
                VCSH_COMMAND_RETURN_CODE=$?
@@ -212,7 +216,7 @@ git_dir_exists() {
 }
 
 hook() {
 }
 
 hook() {
-       for hook in $VCSH_HOOK_D/$1* $VCSH_HOOK_D/$VCSH_REPO_NAME.$1*; do
+       for hook in "$VCSH_HOOK_D/$1"* "$VCSH_HOOK_D/$VCSH_REPO_NAME.$1"*; do
                [ -x "$hook" ] || continue
                verbose "executing '$hook'"
                "$hook"
                [ -x "$hook" ] || continue
                verbose "executing '$hook'"
                "$hook"
@@ -231,31 +235,33 @@ init() {
 
 list() {
        for repo in "$VCSH_REPO_D"/*.git; do
 
 list() {
        for repo in "$VCSH_REPO_D"/*.git; do
-               [ -d "$repo" ] && [ -r "$repo" ] && echo $(basename "$repo" .git)
+               [ -d "$repo" ] && [ -r "$repo" ] && echo "$(basename "$repo" .git)"
        done
 }
 
 get_files() {
        done
 }
 
 get_files() {
-       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
        git ls-files
 }
 
 list_tracked() {
        for VCSH_REPO_NAME in $(list); do
                get_files
        git ls-files
 }
 
 list_tracked() {
        for VCSH_REPO_NAME in $(list); do
                get_files
-       done | sort -u
+       done | sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | \
+           sed 's/[,\&]/\\&/g')," | sort -u
 }
 
 list_tracked_by() {
        use
 }
 
 list_tracked_by() {
        use
-       git ls-files | sort -u
+       git ls-files | sed "s,^,$(printf '%s\n' "$VCSH_BASE/" | \
+           sed 's/[,\&]/\\&/g')," | sort -u
 }
 
 pull() {
        hook pre-pull
        for VCSH_REPO_NAME in $(list); do
 }
 
 pull() {
        hook pre-pull
        for VCSH_REPO_NAME in $(list); do
-               printf "$VCSH_REPO_NAME: "
-               export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+               printf '%s: ' "$VCSH_REPO_NAME"
+               GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
                use
                git pull
                VCSH_COMMAND_RETURN_CODE=$?
                use
                git pull
                VCSH_COMMAND_RETURN_CODE=$?
@@ -267,8 +273,8 @@ pull() {
 push() {
        hook pre-push
        for VCSH_REPO_NAME in $(list); do
 push() {
        hook pre-push
        for VCSH_REPO_NAME in $(list); do
-               printf "$VCSH_REPO_NAME: "
-               export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+               printf '%s: ' "$VCSH_REPO_NAME"
+               GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
                use
                git push
                VCSH_COMMAND_RETURN_CODE=$?
                use
                git push
                VCSH_COMMAND_RETURN_CODE=$?
@@ -288,8 +294,8 @@ rename() {
 
        # Now that the repository has been renamed, we need to fix up its configuration
        # Overwrite old name..
 
        # Now that the repository has been renamed, we need to fix up its configuration
        # Overwrite old name..
-       GIT_DIR="$GIT_DIR_NEW"
-       VCSH_REPO_NAME="$VCSH_REPO_NAME_NEW"
+       GIT_DIR=$GIT_DIR_NEW
+       VCSH_REPO_NAME=$VCSH_REPO_NAME_NEW
        # ..and clobber all old configuration
        upgrade
 }
        # ..and clobber all old configuration
        upgrade
 }
@@ -303,15 +309,15 @@ run() {
 }
 
 status() {
 }
 
 status() {
-       if [ ! "x$VCSH_REPO_NAME" = "x" ]; then
-               export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+       if [ -n "$VCSH_REPO_NAME" ]; then
+               GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
                use
                git status --short --untracked-files='no'
                VCSH_COMMAND_RETURN_CODE=$?
        else
                for VCSH_REPO_NAME in $(list); do
                        echo "$VCSH_REPO_NAME:"
                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"
+                       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
                        use
                        git status --short --untracked-files='no'
                        VCSH_COMMAND_RETURN_CODE=$?
                        use
                        git status --short --untracked-files='no'
                        VCSH_COMMAND_RETURN_CODE=$?
@@ -329,12 +335,12 @@ upgrade() {
        # core.worktree may be absolute or relative to $GIT_DIR, depending on
        # user preference
        if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ]; then
        # core.worktree may be absolute or relative to $GIT_DIR, depending on
        # user preference
        if [ ! "x$VCSH_WORKTREE" = 'xabsolute' ]; then
-               git config core.worktree $(cd $GIT_DIR && GIT_WORK_TREE="$VCSH_BASE" git rev-parse --show-cdup)
+               git config core.worktree "$(cd "$GIT_DIR" && GIT_WORK_TREE=$VCSH_BASE git rev-parse --show-cdup)"
        elif [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
                git config core.worktree "$VCSH_BASE"
        fi
        [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
        elif [ ! "x$VCSH_WORKTREE" = 'xrelative' ]; then
                git config core.worktree "$VCSH_BASE"
        fi
        [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
-       git config core.attributesfile ".gitattributes.d/$VCSH_REPO_NAME"
+       [ ! "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"
        git config vcsh.vcsh 'true'
        use
        [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
@@ -344,13 +350,14 @@ upgrade() {
 
 use() {
        git_dir_exists
 
 use() {
        git_dir_exists
-       export VCSH_DIRECTORY="$VCSH_REPO_NAME"
+       VCSH_DIRECTORY=$VCSH_REPO_NAME; export VCSH_DIRECTORY
 }
 
 which() {
 }
 
 which() {
+       [ -e "$VCSH_COMMAND_PARAMETER" ] || fatal "'$VCSH_COMMAND_PARAMETER' does not exist" 1
        for VCSH_REPO_NAME in $(list); do
                for VCSH_FILE in $(get_files); do
        for VCSH_REPO_NAME in $(list); do
                for VCSH_FILE in $(get_files); do
-                       echo $VCSH_FILE | grep -q "$VCSH_COMMAND_PARAMETER" && echo "$VCSH_REPO_NAME: $VCSH_FILE"
+                       echo "$VCSH_FILE" | grep -q "$VCSH_COMMAND_PARAMETER" && echo "$VCSH_REPO_NAME: $VCSH_FILE"
                done
        done | sort -u
 }
                done
        done | sort -u
 }
@@ -364,13 +371,13 @@ write_gitignore() {
 
        use
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
 
        use
        cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
-       OLDIFS="$IFS"
+       OLDIFS=$IFS
        IFS=$(printf '\n\t')
        gitignores=$(for file in $(git ls-files); do
                while true; do
        IFS=$(printf '\n\t')
        gitignores=$(for file in $(git ls-files); do
                while true; do
-                       echo $file; new="${file%/*}"
-                       [ "$file" = "$new" ] && break
-                       file="$new"
+                       echo "$file"; new=${file%/*}
+                       [ x"$file" = x"$new" ] && break
+                       file=$new
                done;
        done | sort -u)
 
                done;
        done | sort -u)
 
@@ -386,7 +393,7 @@ write_gitignore() {
                        { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
                fi
        done
                        { echo "$gitignore/*" | sed 's@^@!/@' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
                fi
        done
-       IFS="$OLDIFS"
+       IFS=$OLDIFS
        if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
                rm -f "$tempfile" || error "could not delete '$tempfile'"
                exit
        if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
                rm -f "$tempfile" || error "could not delete '$tempfile'"
                exit
@@ -406,9 +413,9 @@ if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xnone' ] &&
        fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
 fi
 
        fatal "'\$VCSH_GITIGNORE' must equal 'exact', 'none', or 'recursive'" 1
 fi
 
-export VCSH_COMMAND="$1"
+VCSH_COMMAND=$1; export VCSH_COMMAND
 
 
-case "$VCSH_COMMAND" in
+case $VCSH_COMMAND in
        clon|clo|cl) VCSH_COMMAND=clone;;
        commi|comm|com|co) VCSH_COMMAND=commit;;
        delet|dele|del|de) VCSH_COMMAND=delete;;
        clon|clo|cl) VCSH_COMMAND=clone;;
        commi|comm|com|co) VCSH_COMMAND=commit;;
        delet|dele|del|de) VCSH_COMMAND=delete;;
@@ -426,57 +433,57 @@ case "$VCSH_COMMAND" in
        write|writ|wri|wr) VCSH_COMMAND=write-gitignore;;
 esac    
 
        write|writ|wri|wr) VCSH_COMMAND=write-gitignore;;
 esac    
 
-if [ "$VCSH_COMMAND" = 'clone' ]; then
+if [ x"$VCSH_COMMAND" = x'clone' ]; then
        [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
        GIT_REMOTE="$2"
        [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a remote" 1
        GIT_REMOTE="$2"
-       [ -n "$3" ] && VCSH_REPO_NAME="$3" || VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
+       [ -n "$3" ] && VCSH_REPO_NAME=$3 || VCSH_REPO_NAME=$(basename "${GIT_REMOTE#*:}" .git)
        [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
        export VCSH_REPO_NAME
        [ -z "$VCSH_REPO_NAME" ] && fatal "$VCSH_COMMAND: could not determine repository name" 1
        export VCSH_REPO_NAME
-       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
 elif [ "$VCSH_COMMAND" = 'version' ]; then
        echo "$SELF $VERSION"
        git version
        exit
 elif [ "$VCSH_COMMAND" = 'version' ]; then
        echo "$SELF $VERSION"
        git version
        exit
-elif [ "$VCSH_COMMAND" = 'which' ]; then
+elif [ x"$VCSH_COMMAND" = x'which' ]; then
        [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a filename" 1
        [ -n "$3" ] && fatal "$VCSH_COMMAND: too many parameters" 1
        [ -z "$2" ] && fatal "$VCSH_COMMAND: please specify a filename" 1
        [ -n "$3" ] && fatal "$VCSH_COMMAND: too many parameters" 1
-       export VCSH_COMMAND_PARAMETER="$2"
-elif [ "$VCSH_COMMAND" = 'delete' ]           ||
-     [ "$VCSH_COMMAND" = 'enter' ]            ||
-     [ "$VCSH_COMMAND" = 'init' ]             ||
-     [ "$VCSH_COMMAND" = 'list-tracked-by' ]  ||
-     [ "$VCSH_COMMAND" = 'rename' ]           ||
-     [ "$VCSH_COMMAND" = 'run' ]              ||
-     [ "$VCSH_COMMAND" = 'upgrade' ]          ||
-     [ "$VCSH_COMMAND" = 'write-gitignore' ]; then
-       [ -z $2 ]                                 && fatal "$VCSH_COMMAND: please specify repository to work on" 1
-       [ "$VCSH_COMMAND" = 'rename' -a -z "$3" ] && fatal "$VCSH_COMMAND: please specify a target name" 1
-       [ "$VCSH_COMMAND" = 'run'    -a -z "$3" ] && fatal "$VCSH_COMMAND: please specify a command" 1
-       export VCSH_REPO_NAME="$2"
-       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
-       [ "$VCSH_COMMAND" = 'rename' ] && { export VCSH_REPO_NAME_NEW="$3";
-                                           export GIT_DIR_NEW="$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git"; }
-       [ "$VCSH_COMMAND" = 'run' ]    && shift 2
-elif [ "$VCSH_COMMAND" = 'commit' ] ||
-     [ "$VCSH_COMMAND" = 'list' ] ||
-     [ "$VCSH_COMMAND" = 'list-tracked' ] ||
-     [ "$VCSH_COMMAND" = 'pull' ] ||
-     [ "$VCSH_COMMAND" = 'push' ]; then
+       VCSH_COMMAND_PARAMETER=$2; export VCSH_COMMAND_PARAMETER
+elif [ x"$VCSH_COMMAND" = x'delete' ]           ||
+     [ x"$VCSH_COMMAND" = x'enter' ]            ||
+     [ x"$VCSH_COMMAND" = x'init' ]             ||
+     [ x"$VCSH_COMMAND" = x'list-tracked-by' ]  ||
+     [ x"$VCSH_COMMAND" = x'rename' ]           ||
+     [ x"$VCSH_COMMAND" = x'run' ]              ||
+     [ x"$VCSH_COMMAND" = x'upgrade' ]          ||
+     [ x"$VCSH_COMMAND" = x'write-gitignore' ]; then
+       [ -z "$2" ]                                     && fatal "$VCSH_COMMAND: please specify repository to work on" 1
+       [ x"$VCSH_COMMAND" = x'rename' ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a target name" 1
+       [ x"$VCSH_COMMAND" = x'run'    ] && [ -z "$3" ] && fatal "$VCSH_COMMAND: please specify a command" 1
+       VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
+       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
+       [ x"$VCSH_COMMAND" = x'rename' ] && { VCSH_REPO_NAME_NEW=$3; export VCSH_REPO_NAME_NEW;
+                                             GIT_DIR_NEW=$VCSH_REPO_D/$VCSH_REPO_NAME_NEW.git; export GIT_DIR_NEW; }
+       [ x"$VCSH_COMMAND" = x'run' ]    && shift 2
+elif [ x"$VCSH_COMMAND" = x'commit' ] ||
+     [ x"$VCSH_COMMAND" = x'list'   ] ||
+     [ x"$VCSH_COMMAND" = x'list-tracked' ] ||
+     [ x"$VCSH_COMMAND" = x'pull'   ] ||
+     [ x"$VCSH_COMMAND" = x'push'   ]; then
        :
        :
-elif [ "$VCSH_COMMAND" = 'status' ]; then
-       export VCSH_REPO_NAME="$2"
+elif [ x"$VCSH_COMMAND" = x'status' ]; then
+       VCSH_REPO_NAME=$2; export VCSH_REPO_NAME
 elif [ -n "$2" ]; then
 elif [ -n "$2" ]; then
-       export VCSH_COMMAND='run'
-       export VCSH_REPO_NAME="$1"
-       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
-       [ -d $GIT_DIR ] || { help; exit 1; }
+       VCSH_COMMAND='run'; export VCSH_COMMAND
+       VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
+       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
+       [ -d "$GIT_DIR" ] || { help; exit 1; }
        shift 1
        set -- "git" "$@"
 elif [ -n "$VCSH_COMMAND" ]; then
        shift 1
        set -- "git" "$@"
 elif [ -n "$VCSH_COMMAND" ]; then
-       export VCSH_COMMAND='enter'
-       export VCSH_REPO_NAME="$1"
-       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
-       [ -d $GIT_DIR ] || { help; exit 1; }
+       VCSH_COMMAND='enter'; export VCSH_COMMAND
+       VCSH_REPO_NAME=$1; export VCSH_REPO_NAME
+       GIT_DIR=$VCSH_REPO_D/$VCSH_REPO_NAME.git; export GIT_DIR
+       [ -d "$GIT_DIR" ] || { help; exit 1; }
 else
        # $1 is empty, or 'help'
        help && exit
 else
        # $1 is empty, or 'help'
        help && exit
@@ -484,9 +491,9 @@ fi
 
 # Did we receive a directory instead of a name?
 # Mangle the input to fit normal operation.
 
 # Did we receive a directory instead of a name?
 # Mangle the input to fit normal operation.
-if echo $VCSH_REPO_NAME | grep -q '/'; then
-       export GIT_DIR=$VCSH_REPO_NAME
-       export VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git)
+if echo "$VCSH_REPO_NAME" | grep -q '/'; then
+       GIT_DIR=$VCSH_REPO_NAME; export GIT_DIR
+       VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git); export VCSH_REPO_NAME
 fi
 
 check_dir() {
 fi
 
 check_dir() {
@@ -503,10 +510,18 @@ check_dir() {
 
 check_dir "$VCSH_REPO_D"
 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
 
 check_dir "$VCSH_REPO_D"
 [ ! "x$VCSH_GITIGNORE" = 'xnone' ] && check_dir "$VCSH_BASE/.gitignore.d"
-check_dir "$VCSH_BASE/.gitattributes.d"
+[ ! "x$VCSH_GITATTRIBUTES" = 'xnone' ] && check_dir "$VCSH_BASE/.gitattributes.d"
 
 verbose "$VCSH_COMMAND begin"
 
 verbose "$VCSH_COMMAND begin"
-export VCSH_COMMAND=$(echo $VCSH_COMMAND | sed 's/-/_/g')
+VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
+
+# source overlay functions
+for overlay in "$VCSH_OVERLAY_D/$VCSH_COMMAND"* "$VCSH_OVERLAY_D/$VCSH_REPO_NAME.$VCSH_COMMAND"*; do
+       [ -r "$overlay" ] || continue
+       info "sourcing '$overlay'"
+       . "$overlay"
+done
+
 hook pre-command
 $VCSH_COMMAND "$@"
 hook post-command
 hook pre-command
 $VCSH_COMMAND "$@"
 hook post-command
version controlled RC files

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