add ability to parse strings like "100kib" and "100 kib"

crates/nu-command/Cargo.toml

@@ -22,6 +22,7 @@ sysinfo = "0.20.4"
 chrono = { version = "0.4.19", features = ["serde"] }
 terminal_size = "0.1.17"
 lscolors = { version = "0.8.0", features = ["crossterm"] }
+bytesize = "1.1.0"
 
 [features]
 trash-support = ["trash"]

crates/nu-command/src/conversions/into/filesize.rs

@@ -160,8 +160,8 @@ pub fn action(input: Value, span: Span) -> Value {
     }
 }
 fn int_from_string(a_string: &str, span: Span) -> Result<i64, ShellError> {
-    match a_string.parse::<i64>() {
-        Ok(n) => Ok(n),
+    match a_string.parse::<bytesize::ByteSize>() {
+        Ok(n) => Ok(n.0 as i64),
         Err(_) => Err(ShellError::CantConvert("int".into(), span)),
     }
 }