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Use explicit variable names and improve quoting
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index a38e55f695a78b7cd0f36fa2bfc2c470755961d4..029c42c4c5f0348647c7cecb1673cb495b637a95 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -35,96 +35,20 @@ verbose() {
        if [ -n "$VCSH_DEBUG" ] || [ -n "$VCSH_VERBOSE" ]; then echo "$SELF: verbose: $@"; fi
 }
 
        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 "$GIT_REMOTE"
        git config branch.master.remote origin
        init
        git remote add origin "$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" ] &&
        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
        [ "$VCSH_CONFLICT" = '1' ] &&
                        VCSH_CONFLICT=1;
        done
        [ "$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 $VCSH_REPO_NAME git pull' to finish cloning.\n" 17
        git merge origin/master
        git merge origin/master
-       verbose "clone end"
-
-#elif [ "$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 "$HOME"
        old_dir="$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:
 
        files=$(git ls-files)
        echo "These files will be deleted:
 
@@ -160,41 +78,42 @@ $files
 AGAIN, THIS WILL DELETE YOUR DATA!
 To continue, type \"Yes, do as I say\""
        read answer
 AGAIN, THIS WILL DELETE YOUR DATA!
 To continue, type \"Yes, do as I say\""
        read answer
-       [ "x$answer" = "xYes, do as I say" ] || return 1
+       [ "x$answer" = "xYes, do as I say" ] || exit 16
        for file in $files; do
        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
        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"
        cd "$old_dir"
-       verbose "delete end"
+}
 
 
-elif [ "$VCSH_COMMAND" = 'enter' ]; then
-       verbose "enter begin"
-       use || return $?
+enter() {
+       use
        $SHELL
        $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"
-       use || return $?
+run() {
+       use
        $VCSH_EXTERNAL_COMMAND
        $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"
        # 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)
                        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/^/!/' >> "$tempfile"
        echo '*' > "$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" &&
        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
        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" ||
                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" ||
        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 "$old_dir"
        cd "$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/$VCSH_REPO_NAME.git"
+       [ "$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
+       # $1 is empty, or 'help'
+       help && exit
 fi
 fi
+
+for check_directory in "$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.