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

Cargo.lock

@@ -113,6 +113,12 @@ dependencies = [
  "utf8-width",
 ]
 
+[[package]]
+name = "bytesize"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c58ec36aac5066d5ca17df51b3e70279f5670a72102f5752cb7e7c856adfc70"
+
 [[package]]
 name = "cc"
 version = "1.0.71"
@@ -533,6 +539,7 @@ dependencies = [
 name = "nu-command"
 version = "0.1.0"
 dependencies = [
+ "bytesize",
  "chrono",
  "glob",
  "lscolors",

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)),
     }
 }