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Cleanup argument parsing and delegation
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index 16bfa53f738e3fd0a80b105c84bd2bc74d02e251..50c1c31c7e63487a28ecb54b1cbaa8085b046527 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -48,91 +48,7 @@ info() {
        echo "$SELF: info: $1"
 }
 
        echo "$SELF: info: $1"
 }
 
-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"
-}
-
-init() {
-       verbose "init() begin"
-       [ ! -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 "$GIT_WORK_TREE"
-       git init
-       setup
-       verbose "init() end"
-}
-
-use() {
-       verbose "use() begin"
-       if [ ! -d "$GIT_DIR" ]; then
-               error "no repository found for '$VCSH_REPO_NAME'"
-               return 12
-       fi
-       export GIT_DIR
-       export GIT_WORK_TREE="$(git config --get core.worktree)"
-       export VCSH_DIRECTORY="$VCSH_REPO_NAME"
-       verbose "use() end"
-}
-
-
-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 ] && fatal "$1: please specify repository to work on" 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" ] && fatal "$1 $2: please specify a command" 1
-       fi
-elif [ "$1" = 'help' ] ||
-     [ "$1" = 'list' ]; then
-       export VCSH_COMMAND="$1"
-else
-       [ -z $1 ] && help && exit 0
-       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 $*"
-fi
-
-
-for check_directory in "$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 '$check_directory'" 50
-               fi
-       fi
-done
-
-
-if [ "$VCSH_COMMAND" = 'clone' ]; then
-       verbose "clone begin"
+clone () {
        init
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
        init
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
@@ -147,14 +63,9 @@ if [ "$VCSH_COMMAND" = 'clone' ]; then
                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
                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 || exit $?
        old_dir="$PWD"
        cd "$HOME"
        use || exit $?
@@ -173,34 +84,35 @@ To continue, type \"Yes, do as I say\""
        done
        rm -rf "$GIT_DIR" || info "could not delete '$GIT_DIR'"
        cd "$old_dir"
        done
        rm -rf "$GIT_DIR" || info "could not delete '$GIT_DIR'"
        cd "$old_dir"
-       verbose "delete end"
+}
 
 
-elif [ "$VCSH_COMMAND" = 'enter' ]; then
-       verbose "enter begin"
+enter () {
        use || exit $?
        $SHELL
        use || exit $?
        $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
        for i in "$VCSH_BASE"/*.git; do
                echo $(basename "$i" .git)
        done
-       verbose "list end"
+}
 
 
-elif [ "$VCSH_COMMAND" = 'run' ]; then
-       verbose "run begin"
+run () {
        use || exit $?
        $VCSH_EXTERNAL_COMMAND
        use || exit $?
        $VCSH_EXTERNAL_COMMAND
-       verbose "run end"
+}
 
 
-elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
-       verbose "seed-gitignore begin"
+seed_gitignore () {
        use || exit $?
        # 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.
        use || exit $?
        # Switching directory as this has to be executed from $HOME to be of any use.
        # Going back into old directory at the end in case `vcsh use` is reactivated.
@@ -230,17 +142,72 @@ elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
        mv -f "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" ||
                fatal "could not move '$tempfile' to '$HOME/.gitignore.d/$VCSH_REPO_NAME'" 53
        cd "$old_dir"
        mv -f "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" ||
                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   || exit $?
-       setup || exit $?
-       verbose "seed-gitignore end"
+setup() {
+       use
+       git config core.worktree     "$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
-       fatal "You should never reach this code. File a bug, please." 99
+use() {
+       if [ ! -d "$GIT_DIR" ]; then
+               error "no repository found for '$VCSH_REPO_NAME'"
+               return 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
+       # $1 is empty, or 'help'
+       help && exit
 fi
 fi
+
+for check_directory in "$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"
version controlled RC files

Legalese

All content available in this repository is copyright © martin f. krafft, unless otherwise noted.

All files and their content are released under the terms of the Artistic Licence 2.0, unless otherwise noted.

The operator of this repository shall not be held liable for offending content in pages linking to or linked from these page, nor does he endorse their content unless stated otherwise.