add -C flag to change directory before starting

2 files changed, 8 insertions, 0 deletions

diff --git a/src/args.rs b/src/args.rs
index 6a46986..9613dc3 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -116,6 +116,10 @@ pub struct Args {
     #[structopt(short, long)]
     pub touch: bool,
 
+    /// Change to the given directory before running.
+    #[structopt(short = "C", long, parse(from_os_str))]
+    pub directory: Option<PathBuf>,
+
     /// Target names or macro definitions.
     ///
     /// If no target is specified, while make is processing the makefiles, the first
diff --git a/src/main.rs b/src/main.rs
index f0e0c1d..b43249d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -20,6 +20,7 @@
     clippy::todo
 )]
 
+use std::env;
 use std::fs::metadata;
 use std::io::stdin;
 use std::path::PathBuf;
@@ -44,6 +45,9 @@ fn main() -> Result<()> {
     jane_eyre::install()?;
 
     let mut args = Args::from_env_and_args();
+    if let Some(dir) = args.directory.as_ref() {
+        env::set_current_dir(dir)?;
+    }
     // If no makefile is specified, try some options.
     if args.makefile.is_empty() {
         let default_makefile = DEFAULT_PATHS.iter().find(|name| metadata(name).is_ok());