test usage

.drone.yml

@@ -67,4 +67,14 @@ steps:
       - ls -la $HOME/.trash/
       - trash_rm testfile2 testfile3
       - trash_list
-      - ls -la $HOME/.trash/
+      - ls -la $HOME/.trash/
+
+  - name: test usage
+    depends_on:
+      - install
+      - test trash_restore
+    image: bash:latest
+    pull: if-not-exists
+    commands:
+      - . $HOME/.bashrc
+      - trash || true

README.md

@@ -3,17 +3,18 @@
 [![Build Status](https://drone.pyas.de/api/badges/Kim/trash/status.svg)](https://drone.pyas.de/Kim/trash)
 
 ## Installation:  
-Place the file in your desired path and it in your $HOME/.bashrc or in /etc/.bashrc:
+the trash.sh file in your desired path and source it in your $HOME/.bashrc or in /etc/.bashrc:
 
     . /path/to/trash.sh
 
+- As the Script runs it first checks if $HOME/.trash/ (your trash bin) in your home dir exists and creates it if missing.
+
 Add cleanup job to your cron:
 
     # .trash cleanup of all contents (files and dirs) older than 31 days every morning at 06:00
     0 6 * * 0 find /home/YOURHOME/.trash/ -mtime +31 -delete  
 
 ## Usage: 
-As the Script runs it first checks if $HOME/.trash/ (your trash bin) in your home dir exists and creates it if missing.
 
  - `trash FILE1 DIR2 ...` or `trash_put FILE1 DIR2 ...` to move files and directories with relative or absolute paths to your .trash
  - `trash_list` to list all files and dirs that you put in the trash in the last 30 days

trash.sh

@@ -7,11 +7,20 @@ TRASH_DIR="$HOME"/.trash
 FILE_PATHS_FILE="$TRASH_DIR/.filepaths"
 [ ! -f "$FILE_PATHS_FILE" ] && touch "$FILE_PATHS_FILE"
 
+usage() {
+  local func_args=$1
+  local func_name="$2"
+
+  if [[ $func_args == 0 ]]; then echo -e "At least one argument required:\n$func_name FILE1  DIR2 ..."; return 1; fi
+}
+
 trash_list() {
   find "$TRASH_DIR" ! -name ".filepaths" | tail -n +2
 }
 
 trash_put() {
+  usage "$#" "$0"
+
   for FILE in $@; do
     # Store old filepath for later restore
     echo "$FILE $(readlink -f "$FILE")" >>"$FILE_PATHS_FILE"
@@ -25,6 +34,8 @@ trash_empty() {
 }
 
 trash_restore() {
+  usage "$#" "$0"
+
   for FILE_TO_RESTORE in "$@"; do
     # Get old filepath for restore
     OLD_PATH=$(grep "$FILE_TO_RESTORE" "$FILE_PATHS_FILE" | cut -d ' ' -f2)
@@ -38,6 +49,9 @@ trash_restore() {
 }
 
 trash_rm() {
+  usage "$#" "$0"
+  #if [[ $# == 0 ]]; then echo -e "At least one argument required:\n$0 FILE1  DIR2 ..."; return 1; fi
+
   for FILE_TO_REMOVE in "$@"; do
     if ! echo "$FILE_TO_REMOVE" | grep "$HOME/.trash"
       then FILEPATH_TO_REMOVE="$HOME/.trash/$FILE_TO_REMOVE"