Add -o option to shasum

.gitignore

@@ -1,2 +1,2 @@
-/build
+/target
 /.idea

Cargo.lock

@@ -129,6 +129,7 @@ dependencies = [
  "argh",
  "base16ct",
  "cwdemangle",
+ "filetime",
  "hex",
  "lazy_static",
  "log",
@@ -186,6 +187,18 @@ dependencies = [
  "termcolor",
 ]
 
+[[package]]
+name = "filetime"
+version = "0.2.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b9663d381d07ae25dc88dbdf27df458faa83a9b25336bcac83d5e452b5fc9d3"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall",
+ "windows-sys",
+]
+
 [[package]]
 name = "form_urlencoded"
 version = "1.1.0"
@@ -433,6 +446,15 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
+dependencies = [
+ "bitflags",
+]
+
 [[package]]
 name = "regex"
 version = "1.7.0"
@@ -657,3 +679,60 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41d2aa71f6f0cbe00ae5167d90ef3cfe66527d6f613ca78ac8024c3ccab9a19e"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd0f252f5a35cac83d6311b2e795981f5ee6e67eb1f9a7f64eb4500fbc4dcdb4"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbeae19f6716841636c28d695375df17562ca208b2b7d0dc47635a50ae6c5de7"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84c12f65daa39dd2babe6e442988fc329d6243fdce47d7d2d155b8d874862246"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf7b1b21b5362cbc318f686150e5bcea75ecedc74dd157d874d754a2ca44b0ed"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d525d2ba30eeb3297665bd434a54297e4170c7f1a44cad4ef58095b4cd2028"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.42.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"

Cargo.toml

@@ -3,7 +3,7 @@ name = "decomp-toolkit"
 description = "GameCube/Wii decompilation project tools."
 authors = ["Luke Street <luke@street.dev>"]
 license = "MIT OR Apache-2.0"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2021"
 publish = false
 build = "build.rs"
@@ -20,6 +20,7 @@ anyhow = "1.0.64"
 argh = "0.1.8"
 base16ct = "0.1.1"
 cwdemangle = "0.1.3"
+filetime = "0.2.18"
 hex = "0.4.3"
 lazy_static = "1.4.0"
 log = "0.4.17"

src/cmd/shasum.rs

@@ -1,10 +1,12 @@
 use std::{
-    fs::File,
+    fs::{File, OpenOptions},
     io::{BufRead, BufReader, Read},
+    path::Path,
 };
 
 use anyhow::{Context, Error, Result};
 use argh::FromArgs;
+use filetime::{set_file_mtime, FileTime};
 use sha1::{Digest, Sha1};
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
@@ -17,6 +19,9 @@ pub struct Args {
     #[argh(positional)]
     /// path to file
     file: String,
+    #[argh(option, short = 'o')]
+    /// touch output file on successful check
+    output: Option<String>,
 }
 
 const DEFAULT_BUF_SIZE: usize = 8192;
@@ -31,7 +36,7 @@ pub fn run(args: Args) -> Result<()> {
     }
 }
 
-fn check(_args: Args, file: File) -> Result<()> {
+fn check(args: Args, file: File) -> Result<()> {
     let reader = BufReader::new(file);
     let mut mismatches = 0usize;
     for line in reader.lines() {
@@ -63,6 +68,9 @@ fn check(_args: Args, file: File) -> Result<()> {
         eprintln!("WARNING: {} computed checksum did NOT match", mismatches);
         std::process::exit(1);
     }
+    if let Some(out_path) = args.output {
+        touch(&out_path).with_context(|| format!("Failed to touch output file '{}'", out_path))?;
+    }
     Ok(())
 }
 
@@ -86,3 +94,14 @@ fn file_sha1(mut file: File) -> Result<sha1::digest::Output<Sha1>> {
         hasher.update(&buf[0..read]);
     })
 }
+
+fn touch<P: AsRef<Path>>(path: P) -> std::io::Result<()> {
+    if path.as_ref().exists() {
+        set_file_mtime(path, FileTime::now())
+    } else {
+        match OpenOptions::new().create(true).write(true).open(path) {
+            Ok(_) => Ok(()),
+            Err(e) => Err(e),
+        }
+    }
+}