Add the rest of the suggestions from code review

src/benchmark/executor.rs

@@ -1,4 +1,4 @@
-use std::process::{ExitStatus, Stdio};
+use std::process::ExitStatus;
 
 use crate::command::Command;
 use crate::options::{

src/cli.rs

@@ -313,12 +313,14 @@ fn build_command() -> Command {
             .help("Enable debug mode which does not actually run commands, but returns fake times when the command is 'sleep <time>'.")
         )
         .arg(
-            Arg::new("stdin-data")
-                .long("stdin-data")
+            Arg::new("input")
+                .long("input")
                 .takes_value(true)
                 .number_of_values(1)
-                .value_name("FILE")
-                .help("Path to file containing stdin data to provide to the command"),
+                .value_name("FROM")
+                .help("Control where the input of the benchmark comes from. <FROM> can be: \
+                       null: Read from /edv/null (the default).
+                       <FILE>: Read the input from the given file"),
         )
 }
 

src/options.rs

@@ -223,14 +223,14 @@ pub struct Options {
     /// Determines how we run commands
     pub executor_kind: ExecutorKind,
 
+    /// Where input to the benchmarked command comes from
+    pub command_input_policy: CommandInputPolicy,
+
     /// What to do with the output of the benchmarked command
     pub command_output_policy: CommandOutputPolicy,
 
     /// Which time unit to use when displaying results
     pub time_unit: Option<Unit>,
-
-    /// Where input to the benchmarked command comes from
-    pub command_input_policy: CommandInputPolicy,
 }
 
 impl Default for Options {
@@ -388,7 +388,7 @@ impl Options {
                 .map_err(|e| OptionsError::FloatParsingError("min-benchmarking-time", e))?;
         }
 
-        options.command_input_policy = if let Some(path_str) = matches.value_of("stdin-data") {
+        options.command_input_policy = if let Some(path_str) = matches.value_of("input") {
             let path = PathBuf::from(path_str);
             if !path.exists() {
                 return Err(OptionsError::StdinDataFileDoesNotExist(

tests/integration_tests.rs

@@ -219,7 +219,7 @@ fn runs_commands_using_user_defined_shell() {
 fn can_pass_file_data_to_command_via_stdin() {
     hyperfine()
         .arg("--runs=1")
-        .arg("--stdin-data=example_stdin_data")
+        .arg("--input=example_stdin_data")
         .arg("--show-output")
         .arg("cat")
         .assert()
@@ -233,7 +233,7 @@ fn can_pass_file_data_to_command_via_stdin() {
 fn fails_if_invalid_stdin_data_file_provided() {
     hyperfine()
         .arg("--runs=1")
-        .arg("--stdin-data=example_stdin_data_invalid")
+        .arg("--input=example_stdin_data_invalid")
         .arg("--show-output")
         .arg("cat")
         .assert()