Allow negative offset

README.md

@@ -3,14 +3,15 @@
 
 Automatically change brightness depending on screen contents. The program takes a screenshot of the primary screen and calculates its average RGB value and increases/decreases the brightness by a certain value.
 ## Installation
-
 Git clone the repo and do a cargo build.
 
 ```bash
     git clone https://github.com/Supernovatux/auto_backlight
     cd auto_backlight
     cargo build --release
-    ./target/release/auto_backlight -h
+    cargo install --path=./
+    #Make sure ~/.cargo/bin is in your PATH
+    auto_backlight -h
 ```
 
 ## Roadmap

src/cli_parser.rs

@@ -10,11 +10,13 @@ pub struct Cli {
     ///Maximum and minimum change to brightness;
     #[clap(short, long, value_parser, default_value_t = 10)]
     pub limit: i16,
-    ///Offset to limit. Use as --offset=<Value>
-    /// if limit=10
-    /// offset = -5
+    ///Offset to limit.
+    /// #Example
+    /// ```bash
+    /// auto_backlight --offset -5 --limit
+    /// ```
     /// then brightness will vary between -15 to 5;
-    #[clap(long, value_parser, default_value_t = -7)]
+    #[clap(long,short,allow_hyphen_values = true ,value_parser, default_value_t = -7)]
     pub offset: i16,
     ///Interval in which brightness values are refreshed
     #[clap(short, long, value_parser, default_value_t = 5)]