Merge pull request #309 from Byron/copilot/add-env-support-global-arguments

Add environment variable support for global arguments

Author: Byron

Cargo.toml

@@ -29,7 +29,7 @@ tui-crossplatform = [
 trash-move = ["trash"]
 
 [dependencies]
-clap = { version = "4.0.29", features = ["derive"] }
+clap = { version = "4.0.29", features = ["derive", "env"] }
 clap_complete = "4.5.54"
 jwalk = "0.8.1"
 byte-unit = "4"

src/options.rs

@@ -53,7 +53,7 @@ pub struct Args {
 
     /// The amount of threads to use. Defaults to 0, indicating the amount of logical processors.
     /// Set to 1 to use only a single thread.
-    #[clap(short = 't', long = "threads", default_value_t = DEFAULT_THREADS, global = true)]
+    #[clap(short = 't', long = "threads", default_value_t = DEFAULT_THREADS, global = true, env = "DUA_THREADS")]
     pub threads: usize,
 
     /// The format with which to print byte counts.
@@ -64,25 +64,26 @@ pub struct Args {
         default_value_t = dft_format(),
         ignore_case = true,
         global = true,
+        env = "DUA_FORMAT",
     )]
     pub format: ByteFormat,
 
     /// Display apparent size instead of disk usage.
-    #[clap(short = 'A', long, global = true)]
+    #[clap(short = 'A', long, global = true, env = "DUA_APPARENT_SIZE")]
     pub apparent_size: bool,
 
     /// Count hard-linked files each time they are seen
-    #[clap(short = 'l', long, global = true)]
+    #[clap(short = 'l', long, global = true, env = "DUA_COUNT_HARD_LINKS")]
     pub count_hard_links: bool,
 
     /// If set, we will not cross filesystems or traverse mount points
-    #[clap(short = 'x', long, global = true)]
+    #[clap(short = 'x', long, global = true, env = "DUA_STAY_ON_FILESYSTEM")]
     pub stay_on_filesystem: bool,
 
     /// One or more absolute directories to ignore. Note that these are not ignored if they are passed as input path.
     ///
     /// Hence, they will only be ignored if they are eventually reached as part of the traversal.
-    #[clap(long = "ignore-dirs", short = 'i', value_parser, global = true)]
+    #[clap(long = "ignore-dirs", short = 'i', value_parser, global = true, env = "DUA_IGNORE_DIRS")]
     #[cfg_attr(target_os = "linux", clap(default_values = &["/proc", "/dev", "/sys", "/run"]))]
     pub ignore_dirs: Vec<PathBuf>,
 
@@ -91,7 +92,7 @@ pub struct Args {
     pub input: Vec<PathBuf>,
 
     /// Write a log file with debug information, including panics.
-    #[clap(long, global = true)]
+    #[clap(long, global = true, env = "DUA_LOG_FILE")]
     pub log_file: Option<PathBuf>,
 }