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Make error reporting sane
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index a38e55f695a78b7cd0f36fa2bfc2c470755961d4..59c423732e934b8bc77712a6870e9ad430a4b4b7 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -35,6 +35,15 @@ 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
 }
 
+error () {
+       echo "$SELF: error: $1" >&2
+}
+
+fatal () {
+       echo "$SELF: fatal error: $1" >&2
+       exit $2
+}
+
 setup() {
        git config core.worktree     "$GIT_WORK_TREE"
        git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
 setup() {
        git config core.worktree     "$GIT_WORK_TREE"
        git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
@@ -45,14 +54,10 @@ setup() {
 
 init() {
        verbose "init() begin"
 
 init() {
        verbose "init() begin"
-       [ -e "$GIT_DIR" ] &&
-               echo "$SELF: fatal: $GIT_DIR exists" &&
-               return 21
+       [ ! -e "$GIT_DIR" ] || fatal "$GIT_DIR exists" 10
        export GIT_WORK_TREE="$HOME"
        mkdir -p "$GIT_WORK_TREE"
        export GIT_WORK_TREE="$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" || fatal "could not enter $GIT_WORK_TREE" 11
        cd "$GIT_WORK_TREE"
        git init
        setup
        cd "$GIT_WORK_TREE"
        git init
        setup
@@ -62,8 +67,8 @@ init() {
 use() {
        verbose "use() begin"
        if [ ! -d "$GIT_DIR" ]; then
 use() {
        verbose "use() begin"
        if [ ! -d "$GIT_DIR" ]; then
-               echo E: no repository found for "$VCSH_REPO_NAME" >&2
-               return 1
+               error "no repository found for '$VCSH_REPO_NAME'"
+               return 12
        fi
        export GIT_DIR
        export GIT_WORK_TREE="$(git config --get core.worktree)"
        fi
        export GIT_DIR
        export GIT_WORK_TREE="$(git config --get core.worktree)"
@@ -86,24 +91,24 @@ elif [ "$1" = 'delete' ] ||
      [ "$1" = 'run' ] ||
      [ "$1" = 'seed-gitignore' ] ||
      [ "$1" = 'setup' ]; then
      [ "$1" = 'run' ] ||
      [ "$1" = 'seed-gitignore' ] ||
      [ "$1" = 'setup' ]; then
-       [ -z $2 ] && echo "$SELF $1: error: please specify repository to work on" && return 1
+       [ -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
        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 $2: error: please specify a command" && return 1
+               [ -z "$VCSH_EXTERNAL_COMMAND" ] && fatal "$1 $2: please specify a command" 1
        fi
 elif [ "$1" = 'help' ] ||
      [ "$1" = 'list' ]; then
        export VCSH_COMMAND="$1"
 else
        fi
 elif [ "$1" = 'help' ] ||
      [ "$1" = 'list' ]; then
        export VCSH_COMMAND="$1"
 else
-       [ -z $1 ] && help && return 0
+       [ -z $1 ] && help && exit 0
        export VCSH_COMMAND='run'
        export VCSH_REPO_NAME="$1"
        export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
        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
+       [ -d $GIT_DIR ] || { help; exit 1; }
        shift 1
        export VCSH_EXTERNAL_COMMAND="git $*"
 fi
        shift 1
        export VCSH_EXTERNAL_COMMAND="git $*"
 fi
@@ -113,11 +118,10 @@ for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
 do
        if [ ! -d "$check_directory" ]; then
                if [ -e "$check_directory" ]; then
 do
        if [ ! -d "$check_directory" ]; then
                if [ -e "$check_directory" ]; then
-                       echo "$SELF: error: $check_directory exists but is not a directory" >&2
-                       return 2
+                       fatal "$check_directory exists but is not a directory" 13
                else
                        echo "$SELF: info: attempting to create $check_directory"
                else
                        echo "$SELF: info: attempting to create $check_directory"
-                       mkdir -p "$check_directory" || (echo "$SELF: error: could not create $check_directory" >&2; return 2) || return $?
+                       mkdir -p "$check_directory" || fatal "could not create $check_directory" 50
                fi
        fi
 done
                fi
        fi
 done
@@ -132,13 +136,12 @@ if [ "$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 <foo> git pull' to finish cloning.\n" 17
        git merge origin/master
        verbose "clone end"
 
        git merge origin/master
        verbose "clone end"
 
@@ -150,7 +153,7 @@ elif [ "$VCSH_COMMAND" = 'delete' ]; then
        verbose "delete begin"
        old_dir="$PWD"
        cd "$HOME"
        verbose "delete begin"
        old_dir="$PWD"
        cd "$HOME"
-       use || return $?
+       use || exit $?
        echo "$SELF: info: This operation WILL DETROY DATA!"
        files=$(git ls-files)
        echo "These files will be deleted:
        echo "$SELF: info: This operation WILL DETROY DATA!"
        files=$(git ls-files)
        echo "These files will be deleted:
@@ -160,7 +163,7 @@ $files
 AGAIN, THIS WILL DELETE YOUR DATA!
 To continue, type \"Yes, do as I say\""
        read answer
 AGAIN, THIS WILL DELETE YOUR DATA!
 To continue, type \"Yes, do as I say\""
        read answer
-       [ "x$answer" = "xYes, do as I say" ] || return 1
+       [ "x$answer" = "xYes, do as I say" ] || exit 16
        for file in $files; do
                rm -f $file || echo "$SELF: info: could not delete '$file', continuing with deletion"
        done
        for file in $files; do
                rm -f $file || echo "$SELF: info: could not delete '$file', continuing with deletion"
        done
@@ -170,7 +173,7 @@ To continue, type \"Yes, do as I say\""
 
 elif [ "$VCSH_COMMAND" = 'enter' ]; then
        verbose "enter begin"
 
 elif [ "$VCSH_COMMAND" = 'enter' ]; then
        verbose "enter begin"
-       use || return $?
+       use || exit $?
        $SHELL
        verbose "enter end"
 
        $SHELL
        verbose "enter end"
 
@@ -188,13 +191,13 @@ elif [ "$VCSH_COMMAND" = 'list' ]; then
 
 elif [ "$VCSH_COMMAND" = 'run' ]; then
        verbose "run begin"
 
 elif [ "$VCSH_COMMAND" = 'run' ]; then
        verbose "run begin"
-       use || return $?
+       use || exit $?
        $VCSH_EXTERNAL_COMMAND
        verbose "run end"
 
 elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
        verbose "seed-gitignore begin"
        $VCSH_EXTERNAL_COMMAND
        verbose "run end"
 
 elif [ "$VCSH_COMMAND" = 'seed-gitignore' ]; then
        verbose "seed-gitignore begin"
-       use || return $?
+       use || exit $?
        # Switching directory as this has to be executed from $HOME to be of any use.
        # Going back into old directory at the end in case `vcsh use` is reactivated.
        old_dir="$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 +209,7 @@ 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/^/!/' >> "$tempfile"
@@ -215,28 +217,26 @@ elif [ "$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
                echo "$SELF: 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" ||
        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"
                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"
        verbose "seed-gitignore end"
 
 elif [ "$VCSH_COMMAND" = 'setup' ]; then
        verbose "seed-gitignore begin"
        cd "$old_dir"
        verbose "seed-gitignore end"
 
 elif [ "$VCSH_COMMAND" = 'setup' ]; then
        verbose "seed-gitignore begin"
-       use   || return $?
-       setup || return $?
+       use   || exit $?
+       setup || exit $?
        verbose "seed-gitignore end"
 
 else
        verbose "defaulting to calling help()"
        help
        verbose "seed-gitignore end"
 
 else
        verbose "defaulting to calling help()"
        help
-       echo "$SELF: fatal: You should never reach this code. File a bug, please."
-       return 99
+       fatal "You should never reach this code. File a bug, please." 99
 
 fi
 
 fi
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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.