container: lib_edit: refactor for clearer fatal errors

- Make known that non-zero returns are fatal errors
- Return success on success (iadd | manual)
- Add iadd to `edit` usage help
- Remove outdated comments

container/src/finance/lib/internal/lib_edit.bash

@@ -59,7 +59,7 @@ function lib_edit::__parse_args()
 
   Configuration type:
 
-    type${global_arg_delim_2}<fetch|hledger|manual|meta|shell|rules|preprocess>
+    type${global_arg_delim_2}<fetch|hledger|iadd|manual|meta|shell|rules|preprocess>
 
   Account:
 
@@ -246,11 +246,13 @@ function lib_edit::__edit()
         _path+="/post-import.journal"
         [ ! -f "$_path" ] && touch "$_path"
 
-        # TODO: upstream request to provide comment(N) entries
-        [[ "$_type" == "iadd" ]] && /usr/bin/hledger-iadd -f "$_path"
+        if [[ "$_type" == "iadd" ]]; then
+          hledger-iadd -f "$_path" || lib_utils::die_fatal
+        fi
 
-        # TODO: option for editor type
-        [[ "$_type" == "manual" ]] && $EDITOR "$_path"
+        if [[ "$_type" == "manual" ]]; then
+          $EDITOR "$_path" || lib_utils::die_fatal
+        fi
         ;;
       meta)
         [ -z "$global_conf_meta" ] && lib_utils::die_fatal
@@ -271,11 +273,12 @@ function lib_edit::__edit()
         #  - If saved to original, opening with `--skip` will clobber the
         #    original file's comments.
         local -r _skip="$(grep -E "^//!" $_path | wc -l)"
-        visidata --quitguard --motd-url file:///dev/null --filetype csv --skip "$_skip" "$_path"
+        local -r _args=("--quitguard" "--motd-url" "file:///dev/null" "--filetype" "csv" "--skip" "$_skip" "$_path")
+        visidata "${_args[@]}" || lib_utils::die_fatal
 
         # TODO: HACK: visidata saves w/ DOS-style carriage...
         #   ...but there seems to be no option out of this.
-        sed -i 's:\r::g' "$_path"
+        sed -i 's:\r::g' "$_path" || lib_utils::die_fatal
         ;;
       preprocess | rules)
         # Run all paths through one editor instance