refactor: move ProgramWriter to common.rs

src/common.rs

@@ -0,0 +1,15 @@
+use std::io::Write;
+
+pub struct ProgramWriter {
+    stdin: std::process::ChildStdin,
+}
+
+impl Write for ProgramWriter {
+    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
+        self.stdin.write(buf)
+    }
+
+    fn flush(&mut self) -> std::io::Result<()> {
+        self.stdin.flush()
+    }
+}

src/digest_engine.rs

@@ -38,21 +38,6 @@ pub trait DigestEngine {
 
 use std::io::Write;
 
-// Writer that implements Write for the program digest engine
-struct ProgramWriter {
-    stdin: std::process::ChildStdin,
-}
-
-impl Write for ProgramWriter {
-    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
-        self.stdin.write(buf)
-    }
-
-    fn flush(&mut self) -> std::io::Result<()> {
-        self.stdin.flush()
-    }
-}
-
 lazy_static! {
     pub static ref DIGEST_PROGRAMS: EnumMap<DigestType, Option<DigestEngineProgram>> = enum_map! {
         DigestType::Sha256 => None,

src/digest_engine/program.rs

@@ -1,4 +1,4 @@
-use crate::digest_engine::ProgramWriter;
+use crate::common::ProgramWriter;
 use anyhow::{Context, Result, anyhow};
 use log::*;
 use std::env;

src/meta_plugin.rs

@@ -35,21 +35,6 @@ pub trait MetaPlugin {
 
 use std::io::Write;
 
-// Writer that implements Write for the program meta plugin
-struct ProgramWriter {
-    stdin: std::process::ChildStdin,
-}
-
-impl Write for ProgramWriter {
-    fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
-        self.stdin.write(buf)
-    }
-
-    fn flush(&mut self) -> std::io::Result<()> {
-        self.stdin.flush()
-    }
-}
-
 lazy_static! {
     pub static ref META_PLUGIN_PROGRAMS: EnumMap<MetaPluginType, Option<MetaPluginProgram>> = enum_map! {
         MetaPluginType::File => {

src/meta_plugin/program.rs

@@ -1,4 +1,4 @@
-use crate::meta_plugin::MetaPlugin;
+use crate::common::ProgramWriter;
 use anyhow::{Context, Result, anyhow};
 use log::*;
 use std::env;
@@ -8,6 +8,8 @@ use std::io::Write;
 use std::os::unix::fs::PermissionsExt;
 use std::process::{Command, Stdio};
 
+use crate::meta_plugin::MetaPlugin;
+
 #[derive(Clone, Debug)]
 pub struct MetaPluginProgram {
     pub program: String,