Add plain output format for non-interactive use

closes #35

3 files changed, 12 insertions, 5 deletions

diff --git a/Cargo.lock b/Cargo.lock
index ac40bcd..239ff27 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -101,6 +101,7 @@ dependencies = [
 name = "diskus"
 version = "0.5.0"
 dependencies = [
+ "atty 0.2.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "crossbeam-channel 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "humansize 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 1da357b..bf20b92 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,6 +16,7 @@ humansize = "1.1"
 num-format = "0.4"
 rayon = "1.0"
 crossbeam-channel = "0.3"
+atty = "0.2"
 
 [dependencies.clap]
 version = "2"
diff --git a/src/main.rs b/src/main.rs
index ed3b314..54ac6ad 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -32,11 +32,16 @@ fn print_result(size: u64, errors: &[walk::Err], size_format: &FileSizeOpts, ver
             "[diskus warning] the results may be tainted. Re-run with -v/--verbose to print all errors."
         );
     }
-    println!(
-        "{} ({:} bytes)",
-        size.file_size(size_format).unwrap(),
-        size.to_formatted_string(&Locale::en)
-    );
+
+    if atty::is(atty::Stream::Stdout) {
+        println!(
+            "{} ({:} bytes)",
+            size.file_size(size_format).unwrap(),
+            size.to_formatted_string(&Locale::en)
+        );
+    } else {
+        println!("{}", size);
+    }
 }
 
 fn main() {