X-Git-Url: https://git.madduck.net/code/vcsh.git/blobdiff_plain/da4f9ca15ae53b4918374fa4da04b282231e3c7c..4b21d241422c84a3cd54cdd19e59c5110c2908f2:/vcsh

diff --git a/vcsh b/vcsh
index 6fa6644..3c8d083 100755
--- a/vcsh
+++ b/vcsh
@@ -6,7 +6,6 @@
 
 SELF=$(basename $0)
 
-
 help() {
 	echo "usage: $SELF <args>
 
@@ -14,15 +13,17 @@ help() {
          [<repo>]       Clone from an existing repository
    help                 Display this help text
    delete               Delete an existing repository
-   exit                 Exit repository; unset ENV
+   enter                Enter repository; spawn new $SHELL
    init <repo>          Initialize a new repository
    list                 List all repositories
+   rename <repo> \\
+          <newname>     Rename repository
    run <repo> \\
        <command>        Use this repository
 
    seed-gitignore \\
    <repo>               Seed .gitignore.d/<repo> from git ls-files
-   use <repo>           Use repository; set ENV
+   setup                Set up repository with recommended settings
 
    <repo> <git command> Special command that allows you to run git commands
                         directly without having to type so much ;)" >&2
@@ -36,96 +37,20 @@ verbose() {
 	if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
 }
 
-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"
+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
-	git config core.worktree     "$GIT_WORK_TREE"
-	git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
-	touch   "$HOME/.gitignore.d/$VCSH_REPO_NAME"
-	git add "$HOME/.gitignore.d/$VCSH_REPO_NAME"
-	verbose "init() end"
+error() {
+	echo "$SELF: error: $1" >&2
 }
 
-leave() {
-	unset GIT_DIR
-	unset GIT_WORK_TREE
-	unset VCSH_DIRECTORY
+info() {
+	echo "$SELF: info: $1"
 }
 
-
-if [ "$1" = 'clone' ]; then
-	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" = 'init' ] ||
-     [ "$1" = 'run' ] ||
-     [ "$1" = 'seed-gitignore' ] ||
-     [ "$1" = 'use' ]; 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" = 'exit' ] ||
-     [ "$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 "$GIT_REMOTE"
 	git config branch.master.remote origin
@@ -133,27 +58,19 @@ if [ "$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
-#	use || return $?
-	verbose "clone end"
-
-#elif [ "$VCSH_COMMAND" = 'help' ] || [ "$#" -eq 0 ]; then
-elif [ "$VCSH_COMMAND" = 'help' ]; then
-	help
+}
 
-elif [ "$VCSH_COMMAND" = 'delete' ]; then
-	verbose "delete begin"
-	old_dir="$PWD"
-	cd "$HOME"
-	use || return $?
-	echo "$SELF: info: This operation WILL DETROY DATA!"
+delete() {
+	cd "$HOME" || fatal "could not enter '$HOME'" 11
+	use
+	info "This operation WILL DETROY DATA!"
 	files=$(git ls-files)
 	echo "These files will be deleted:
 
@@ -162,53 +79,52 @@ $files
 AGAIN, THIS WILL DELETE YOUR DATA!
 To continue, type \"Yes, do as I say\""
 	read answer
-	[ "x$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 '$GIT_DIR'"
-	cd "$old_dir"
-	verbose "delete end"
+	rmdir "$GIT_DIR" || error "could not delete '$GIT_DIR'"
+}
 
-elif [ "$VCSH_COMMAND" = 'exit' ]; then
-	verbose "exit begin"
-#	if [ -n "$ZSH_VERSION" ] && [ "$VCSH_NO_IGNORE_EOF" = '1' ]; then
-#		unset VCSH_NO_IGNORE_EOF
-#		setopt NO_IGNORE_EOF
-#	fi
-	leave
-#	[ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
-	verbose "exit end"
-	return 0
+enter() {
+	use
+	$SHELL
+}
 
-elif [ "$VCSH_COMMAND" = 'init' ]; then
-	verbose "init begin"
-	init
-#	use || return $?
-	verbose "init end"
+git_dir_exists() {
+	[ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
+}
 
-elif [ "$VCSH_COMMAND" = 'list' ]; then
-	verbose "list begin"
+init() {
+	[ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
+	export GIT_WORK_TREE="$HOME"
+	mkdir -p "$GIT_WORK_TREE" || fatal "could not create '$GIT_WORK_TREE'" 50
+	cd "$GIT_WORK_TREE" || fatal "could not enter '$GIT_WORK_TREE'" 11
+	git init
+	setup
+}
+
+list() {
 	for i in "$VCSH_BASE"/*.git; do
 		echo $(basename "$i" .git)
 	done
-	verbose "list end"
+}
+
+rename() {
+	git_dir_exists
+	[ -d "$GIT_DIR_NEW" ] && fatal "'$GIT_DIR_NEW' exists" 54
+	mv -f "$GIT_DIR" "$GIT_DIR_NEW" || fatal "Could not mv '$GIT_DIR' '$GIT_DIR_NEW'" 52
 
-elif [ "$VCSH_COMMAND" = 'run' ]; then
-	verbose "run begin"
-	use || return $?
+}
+
+run() {
+	use
 	$VCSH_EXTERNAL_COMMAND
-	leave
-	verbose "run end"
+}
 
-elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
-	verbose "seed-gitignore begin"
-	use || return $?
-	# 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"
-	cd "$HOME"
-	git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
+seed_gitignore() {
+	use
+	cd "$HOME" || fatal "could not enter '$HOME'" 11
 	gitignores=$(for file in $(git ls-files); do
 		while true; do
 			echo $file; new="${file%/*}"
@@ -216,49 +132,89 @@ elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
 			file="$new"
 		done;
 	done | sort -u)
-	tempfile=$(mktemp) ||
-		(echo "$SELF: fatal: could not create tempfile" && return 1) || return $?
-	echo '*' > "$tempfile"
+	tempfile=$(mktemp) || fatal "could not create tempfile" 51
+	echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
 	for gitignore in $gitignores; do
-		echo "$gitignore" | sed 's/^/!/' >> "$tempfile"
-		[ -d "$gitignore" ] && echo "$gitignore/*" | sed 's/^/!/'>> "$tempfile"
+		echo "$gitignore" | sed 's/^/!/' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
+		[ -d "$gitignore" ] && echo "$gitignore/*" | sed 's/^/!/'>> "$tempfile" || fatal "could not write to '$tempfile'" 57
 	done
-	diff -N "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" > /dev/null &&
-		rm -f "$tempfile" &&
-		return
+	if [ diff -N "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" > /dev/null ]; then
+		rm -f "$tempfile" || error "could not delete '$tempfile'"
+		exit
+	fi
 	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 $?
-	cd "$old_dir"
-	verbose "seed-gitignore end"
+		fatal "could not move '$tempfile' to '$HOME/.gitignore.d/$VCSH_REPO_NAME'" 53
+}
 
-elif [ "$VCSH_COMMAND" = 'use' ]; then
-	verbose "use begin"
-#	if [ -n "$ZSH_VERSION" ]; then
-#		if [ -o NO_IGNORE_EOF ]; then
-#			export VCSH_NO_IGNORE_EOF=1
-#			setopt IGNORE_EOF
-#		fi
-#		vcsh_exit() {
-#			vcsh exit;
-#			zle reset-prompt;
-#		}
-#		zle -N vcsh_exit
-#		bindkey '^d' 'vcsh_exit'
-#	fi
-	use || return $?
-#	[ -n "$ZSH_VERSION" ] && [ "$USER" = richih ] && buildPS1
-	verbose "use end"
+setup() {
+	use
+	git config core.worktree     "$GIT_WORK_TREE"
+	git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
+	git config vcsh.vcsh         'true'
+	touch   "$HOME/.gitignore.d/$VCSH_REPO_NAME" || error "could not touch '$HOME/.gitignore.d/$VCSH_REPO_NAME'"
+	git add "$HOME/.gitignore.d/$VCSH_REPO_NAME"
+}
 
-else
-	verbose "defaulting to calling help()"
-	help
-	echo "$SELF: fatal: You should never reach this code. File a bug, please."
-	return 99
+use() {
+	git_dir_exists
+	export GIT_WORK_TREE="$(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" = 'rename' ] ||
+     [ "$1" = 'run' ] ||
+     [ "$1" = 'seed-gitignore' ] ||
+     [ "$1" = 'setup' ]; then
+	[ -z $2 ]                      && fatal "$1: please specify repository to work on" 1
+	[ "$1" = 'rename' -a -z "$3" ] && fatal "$1: please specify a target name" 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/$VCSH_REPO_NAME.git"
+	[ "$VCSH_COMMAND" = 'rename' ]         && export GIT_DIR_NEW="$VCSH_BASE/$3.git"
+	[ "$VCSH_COMMAND" = 'run' ] && shift 2 && export VCSH_EXTERNAL_COMMAND="$@"
+	[ "$VCSH_COMMAND" = '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"