X-Git-Url: https://git.madduck.net/code/vcsh.git/blobdiff_plain/7ee75c01a94e3bbd03e809b66c0e17fb2e6791c0..2f7b006ff5df72cff63f8d7cb40d8c68cac07196:/vcsh?ds=inline

diff --git a/vcsh b/vcsh
index a38e55f..a6d0106 100755
--- a/vcsh
+++ b/vcsh
@@ -35,96 +35,20 @@ verbose() {
 	if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
 }
 
-setup() {
-	git config core.worktree     "$GIT_WORK_TREE"
-	git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
-	git config vcsh.vcsh         'true'
-	touch   "$HOME/.gitignore.d/$VCSH_REPO_NAME"
-	git add "$HOME/.gitignore.d/$VCSH_REPO_NAME"
+fatal() {
+	echo "$SELF: fatal: $1" >&2
+	exit $2
 }
 
-init() {
-	verbose "init() begin"
-	[ -e "$GIT_DIR" ] &&
-		echo "$SELF: fatal: $GIT_DIR exists" &&
-		return 21
-	export GIT_WORK_TREE="$HOME"
-	mkdir -p "$GIT_WORK_TREE"
-	cd "$GIT_WORK_TREE" ||
-		(echo "$SELF: fatal: could not enter $GIT_WORK_TREE" &&
-		 return 1) || return $?
-	cd "$GIT_WORK_TREE"
-	git init
-	setup
-	verbose "init() end"
+error() {
+	echo "$SELF: error: $1" >&2
 }
 
-use() {
-	verbose "use() begin"
-	if [ ! -d "$GIT_DIR" ]; then
-		echo E: no repository found for "$VCSH_REPO_NAME" >&2
-		return 1
-	fi
-	export GIT_DIR
-	export GIT_WORK_TREE="$(git config --get core.worktree)"
-	export VCSH_DIRECTORY="$VCSH_REPO_NAME"
-	verbose "use() end"
+info() {
+	echo "$SELF: info: $1"
 }
 
-
-if [ "$1" = 'clone' ]; then
-	export VCSH_COMMAND="$1"
-	GIT_REMOTE="$2"
-	export GIT_REMOTE
-	VCSH_REPO_NAME="$3"
-	[ -z "$VCSH_REPO_NAME" ] && VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
-	export VCSH_REPO_NAME
-	export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
-elif [ "$1" = 'delete' ] ||
-     [ "$1" = 'enter' ] ||
-     [ "$1" = 'init' ] ||
-     [ "$1" = 'run' ] ||
-     [ "$1" = 'seed-gitignore' ] ||
-     [ "$1" = 'setup' ]; then
-	[ -z $2 ] && echo "$SELF $1: error: please specify repository to work on" && return 1
-	export VCSH_COMMAND="$1"
-	export VCSH_REPO_NAME="$2"
-	export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
-	shift 2
-	export VCSH_EXTERNAL_COMMAND="$*"
-	if [ "$VCSH_COMMAND" = 'run' ]; then
-		[ -z "$VCSH_EXTERNAL_COMMAND" ] && echo "$SELF $1 $2: error: please specify a command" && return 1
-	fi
-elif [ "$1" = 'help' ] ||
-     [ "$1" = 'list' ]; then
-	export VCSH_COMMAND="$1"
-else
-	[ -z $1 ] && help && return 0
-	export VCSH_COMMAND='run'
-	export VCSH_REPO_NAME="$1"
-	export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
-	[ -d $GIT_DIR ] || (help && return 1) || return 0
-	shift 1
-	export VCSH_EXTERNAL_COMMAND="git $*"
-fi
-
-
-for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
-do
-	if [ ! -d "$check_directory" ]; then
-		if [ -e "$check_directory" ]; then
-			echo "$SELF: error: $check_directory exists but is not a directory" >&2
-			return 2
-		else
-			echo "$SELF: info: attempting to create $check_directory"
-			mkdir -p "$check_directory" || (echo "$SELF: error: could not create $check_directory" >&2; return 2) || return $?
-		fi
-	fi
-done
-
-
-if [ "$VCSH_COMMAND" = 'clone' ]; then
-	verbose "clone begin"
+clone() {
 	init
 	git remote add origin "$GIT_REMOTE"
 	git config branch.master.remote origin
@@ -132,26 +56,20 @@ if [ "$VCSH_COMMAND" = 'clone' ]; then
 	git fetch
 	for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
 		[ -e "$object" ] &&
-			echo "$SELF: error: $object exists." &&
+			error "'$object' exists." &&
 			VCSH_CONFLICT=1;
 	done
 	[ "$VCSH_CONFLICT" = '1' ] &&
-		echo "$SELF: fatal: will stop after fetching and not try to merge!\n" &&
-		echo "  Once this situation has been resolved, run 'vcsh run <foo> git pull' to finish cloning.\n" &&
-		return 3
+		fatal "will stop after fetching and not try to merge!
+  Once this situation has been resolved, run 'vcsh run $VCSH_REPO_NAME git pull' to finish cloning.\n" 17
 	git merge origin/master
-	verbose "clone end"
-
-#elif [ "$VCSH_COMMAND" = 'help' ] || [ "$#" -eq 0 ]; then
-elif [ "$VCSH_COMMAND" = 'help' ]; then
-	help
+}
 
-elif [ "$VCSH_COMMAND" = 'delete' ]; then
-	verbose "delete begin"
+delete() {
 	old_dir="$PWD"
 	cd "$HOME"
-	use || return $?
-	echo "$SELF: info: This operation WILL DETROY DATA!"
+	use
+	info "This operation WILL DETROY DATA!"
 	files=$(git ls-files)
 	echo "These files will be deleted:
 
@@ -160,41 +78,42 @@ $files
 AGAIN, THIS WILL DELETE YOUR DATA!
 To continue, type \"Yes, do as I say\""
 	read answer
-	[ "x$answer" = "xYes, do as I say" ] || return 1
+	[ "x$answer" = "xYes, do as I say" ] || exit 16
 	for file in $files; do
-		rm -f $file || echo "$SELF: info: could not delete '$file', continuing with deletion"
+		rm -f $file || info "could not delete '$file', continuing with deletion"
 	done
-	rm -rf "$GIT_DIR" || echo "$SELF: info: could not delete '$GIT_DIR'"
+	rm -rf "$GIT_DIR" || info "could not delete '$GIT_DIR'"
 	cd "$old_dir"
-	verbose "delete end"
+}
 
-elif [ "$VCSH_COMMAND" = 'enter' ]; then
-	verbose "enter begin"
-	use || return $?
+enter() {
+	use
 	$SHELL
-	verbose "enter end"
+}
 
-elif [ "$VCSH_COMMAND" = 'init' ]; then
-	verbose "init begin"
-	init
-	verbose "init end"
+init() {
+	[ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
+	export GIT_WORK_TREE="$HOME"
+	mkdir -p "$GIT_WORK_TREE"
+	cd "$GIT_WORK_TREE" || fatal "could not enter '$GIT_WORK_TREE'" 11
+	cd "$GIT_WORK_TREE"
+	git init
+	setup
+}
 
-elif [ "$VCSH_COMMAND" = 'list' ]; then
-	verbose "list begin"
+list() {
 	for i in "$VCSH_BASE"/*.git; do
 		echo $(basename "$i" .git)
 	done
-	verbose "list end"
+}
 
-elif [ "$VCSH_COMMAND" = 'run' ]; then
-	verbose "run begin"
-	use || return $?
+run() {
+	use
 	$VCSH_EXTERNAL_COMMAND
-	verbose "run end"
+}
 
-elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
-	verbose "seed-gitignore begin"
-	use || return $?
+seed_gitignore() {
+	use
 	# Switching directory as this has to be executed from $HOME to be of any use.
 	# Going back into old directory at the end in case `vcsh use` is reactivated.
 	old_dir="$PWD"
@@ -206,8 +125,7 @@ elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
 			file="$new"
 		done;
 	done | sort -u)
-	tempfile=$(mktemp) ||
-		(echo "$SELF: fatal: could not create tempfile" && return 1) || return $?
+	tempfile=$(mktemp) || fatal "could not create tempfile" 51
 	echo '*' > "$tempfile"
 	for gitignore in $gitignores; do
 		echo "$gitignore" | sed 's/^/!/' >> "$tempfile"
@@ -215,28 +133,80 @@ elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
 	done
 	diff -N "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" > /dev/null &&
 		rm -f "$tempfile" &&
-		return
+		exit
 	if [ -e "$HOME/.gitignore.d/$VCSH_REPO_NAME" ]; then
-		echo "$SELF: info: $HOME/.gitignore.d/$VCSH_REPO_NAME differs from new data, moving it to $HOME/.gitignore.d/$VCSH_REPO_NAME.bak"
+		info "'$HOME/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$HOME/.gitignore.d/$VCSH_REPO_NAME.bak'"
 		mv -f "$HOME/.gitignore.d/$VCSH_REPO_NAME" "$HOME/.gitignore.d/$VCSH_REPO_NAME.bak" ||
-			(echo "$SELF: fatal: could not move $HOME/.gitignore.d/$VCSH_REPO_NAME to $HOME/.gitignore.d/$VCSH_REPO_NAME.bak" &&
-			 return 1) || return $?
+			fatal "could not move '$HOME/.gitignore.d/$VCSH_REPO_NAME' to '$HOME/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
 	fi
 	mv -f "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" ||
-		(echo "$SELF: fatal: could not move $tempfile to $HOME/.gitignore.d/$VCSH_REPO_NAME" && return 1) || return $?
+		fatal "could not move '$tempfile' to '$HOME/.gitignore.d/$VCSH_REPO_NAME'" 53
 	cd "$old_dir"
-	verbose "seed-gitignore end"
+}
 
-elif [ "$VCSH_COMMAND" = 'setup' ]; then
-	verbose "seed-gitignore begin"
-	use   || return $?
-	setup || return $?
-	verbose "seed-gitignore end"
+setup() {
+	use
+	git config core.worktree     "$GIT_WORK_TREE"
+	git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
+	git config vcsh.vcsh         'true'
+	touch   "$HOME/.gitignore.d/$VCSH_REPO_NAME"
+	git add "$HOME/.gitignore.d/$VCSH_REPO_NAME"
+}
 
-else
-	verbose "defaulting to calling help()"
-	help
-	echo "$SELF: fatal: You should never reach this code. File a bug, please."
-	return 99
+use() {
+	if [ ! -d "$GIT_DIR" ]; then
+		fatal "no repository found for '$VCSH_REPO_NAME'" 12
+	fi
+	export GIT_WORK_TREE="$(git config --get core.worktree)"
+	export VCSH_DIRECTORY="$VCSH_REPO_NAME"
+}
 
+if [ "$1" = 'clone' ]; then
+	[ -z $2 ] && fatal "$1: please specify a remote" 1
+	export VCSH_COMMAND="$1"
+	GIT_REMOTE="$2"
+	[ -n "$3" ] && VCSH_REPO_NAME="$3" || VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
+	export VCSH_REPO_NAME
+	export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
+elif [ "$1" = 'delete' ] ||
+     [ "$1" = 'enter' ] ||
+     [ "$1" = 'init' ] ||
+     [ "$1" = 'run' ] ||
+     [ "$1" = 'seed-gitignore' ] ||
+     [ "$1" = 'setup' ]; then
+	[ -z $2 ] && fatal "$1: please specify repository to work on" 1
+	[ "$1" = 'run' -a -z "$3" ] && fatal "$1: please specify a command" 1
+	export VCSH_COMMAND="$1"
+	export VCSH_REPO_NAME="$2"
+	export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
+	[ "$1" = 'run' ] && shift 2 && export VCSH_EXTERNAL_COMMAND="$@"
+	[ "$1" = 'seed-gitignore' ] && export VCSH_COMMAND=seed_gitignore
+elif [ "$1" = 'list' ]; then
+	export VCSH_COMMAND="$1"
+elif [ -n "$1" ]; then
+	export VCSH_COMMAND=run
+	export VCSH_REPO_NAME="$1"
+	export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
+	[ -d $GIT_DIR ] || { help; exit 1; }
+	shift 1
+	export VCSH_EXTERNAL_COMMAND="git $*"
+else
+	# $1 is empty, or 'help'
+	help && exit
 fi
+
+for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
+do
+	if [ ! -d "$check_directory" ]; then
+		if [ -e "$check_directory" ]; then
+			fatal "'$check_directory' exists but is not a directory" 13
+		else
+			info "attempting to create '$check_directory'"
+			mkdir -p "$check_directory" || fatal "could not create '$check_directory'" 50
+		fi
+	fi
+done
+
+verbose "$VCSH_COMMAND begin"
+$VCSH_COMMAND
+verbose "$VCSH_COMMAND end, exiting"