cksum: implement --untagged

src/uu/cksum/src/cksum.rs

@@ -6,7 +6,7 @@
 // file that was distributed with this source code.
 
 // spell-checker:ignore (ToDO) fname, algo
-use clap::{crate_version, Arg, Command};
+use clap::{crate_version, Arg, ArgAction, Command};
 use hex::encode;
 use std::ffi::OsStr;
 use std::fs::File;
@@ -103,6 +103,7 @@ struct Options {
     algo_name: &'static str,
     digest: Box<dyn Digest + 'static>,
     output_bits: usize,
+    untagged: bool,
 }
 
 /// Calculate checksum
@@ -161,12 +162,20 @@ where
             ),
             (ALGORITHM_OPTIONS_CRC, true) => println!("{sum} {sz}"),
             (ALGORITHM_OPTIONS_CRC, false) => println!("{sum} {sz} {}", filename.display()),
-            (ALGORITHM_OPTIONS_BLAKE2B, _) => println!("BLAKE2b ({}) = {sum}", filename.display()),
-            _ => println!(
-                "{} ({}) = {sum}",
-                options.algo_name.to_ascii_uppercase(),
-                filename.display()
-            ),
+            (ALGORITHM_OPTIONS_BLAKE2B, _) if !options.untagged => {
+                println!("BLAKE2b ({}) = {sum}", filename.display());
+            }
+            _ => {
+                if options.untagged {
+                    println!("{sum}  {}", filename.display());
+                } else {
+                    println!(
+                        "{} ({}) = {sum}",
+                        options.algo_name.to_ascii_uppercase(),
+                        filename.display()
+                    );
+                }
+            }
         }
     }
 
@@ -208,8 +217,9 @@ fn digest_read<T: Read>(
 }
 
 mod options {
-    pub static FILE: &str = "file";
-    pub static ALGORITHM: &str = "algorithm";
+    pub const ALGORITHM: &str = "algorithm";
+    pub const FILE: &str = "file";
+    pub const UNTAGGED: &str = "untagged";
 }
 
 #[uucore::main]
@@ -228,6 +238,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
         algo_name: name,
         digest: algo,
         output_bits: bits,
+        untagged: matches.get_flag(options::UNTAGGED),
     };
 
     match matches.get_many::<String>(options::FILE) {
@@ -270,5 +281,11 @@ pub fn uu_app() -> Command {
                     ALGORITHM_OPTIONS_SM3,
                 ]),
         )
+        .arg(
+            Arg::new(options::UNTAGGED)
+                .long(options::UNTAGGED)
+                .help("create a reversed style checksum, without digest type")
+                .action(ArgAction::SetTrue),
+        )
         .after_help(AFTER_HELP)
 }

tests/by-util/test_cksum.rs

@@ -159,3 +159,68 @@ fn test_algorithm_stdin() {
         }
     }
 }
+
+#[test]
+fn test_untagged_single_file() {
+    new_ucmd!()
+        .arg("--untagged")
+        .arg("lorem_ipsum.txt")
+        .succeeds()
+        .stdout_is_fixture("untagged/crc_single_file.expected");
+}
+
+#[test]
+fn test_untagged_multiple_files() {
+    new_ucmd!()
+        .arg("--untagged")
+        .arg("lorem_ipsum.txt")
+        .arg("alice_in_wonderland.txt")
+        .succeeds()
+        .stdout_is_fixture("untagged/crc_multiple_files.expected");
+}
+
+#[test]
+fn test_untagged_stdin() {
+    new_ucmd!()
+        .arg("--untagged")
+        .pipe_in_fixture("lorem_ipsum.txt")
+        .succeeds()
+        .stdout_is_fixture("untagged/crc_stdin.expected");
+}
+
+#[test]
+fn test_untagged_algorithm_single_file() {
+    for algo in ALGOS {
+        new_ucmd!()
+            .arg("--untagged")
+            .arg(format!("--algorithm={algo}"))
+            .arg("lorem_ipsum.txt")
+            .succeeds()
+            .stdout_is_fixture(format!("untagged/{algo}_single_file.expected"));
+    }
+}
+
+#[test]
+fn test_untagged_algorithm_multiple_files() {
+    for algo in ALGOS {
+        new_ucmd!()
+            .arg("--untagged")
+            .arg(format!("--algorithm={algo}"))
+            .arg("lorem_ipsum.txt")
+            .arg("alice_in_wonderland.txt")
+            .succeeds()
+            .stdout_is_fixture(format!("untagged/{algo}_multiple_files.expected"));
+    }
+}
+
+#[test]
+fn test_untagged_algorithm_stdin() {
+    for algo in ALGOS {
+        new_ucmd!()
+            .arg("--untagged")
+            .arg(format!("--algorithm={algo}"))
+            .pipe_in_fixture("lorem_ipsum.txt")
+            .succeeds()
+            .stdout_is_fixture(format!("untagged/{algo}_stdin.expected"));
+    }
+}

tests/fixtures/cksum/untagged/blake2b_multiple_files.expected

@@ -0,0 +1,2 @@
+0e97a09189e560c3789c0bff1f020166861ef857d1fbfe4574de1842e3c06cabb9575e4af6309a166158c2b408d3c038c1b49d828b35158142cdc0396d1195c3  lorem_ipsum.txt
+91b8b0f0868e905ad18b8ac35e4a1dacd289857b19258ab5d1e071761af758b0134ec152d4f011fe1825ca889c80c2e072ca70eb50548c25fc49a98937515af4  alice_in_wonderland.txt

tests/fixtures/cksum/untagged/blake2b_single_file.expected

@@ -0,0 +1 @@
+0e97a09189e560c3789c0bff1f020166861ef857d1fbfe4574de1842e3c06cabb9575e4af6309a166158c2b408d3c038c1b49d828b35158142cdc0396d1195c3  lorem_ipsum.txt

tests/fixtures/cksum/untagged/blake2b_stdin.expected

@@ -0,0 +1 @@
+0e97a09189e560c3789c0bff1f020166861ef857d1fbfe4574de1842e3c06cabb9575e4af6309a166158c2b408d3c038c1b49d828b35158142cdc0396d1195c3  -

tests/fixtures/cksum/untagged/bsd_multiple_files.expected

@@ -0,0 +1,2 @@
+08109     1 lorem_ipsum.txt
+01814     1 alice_in_wonderland.txt

tests/fixtures/cksum/untagged/bsd_single_file.expected

@@ -0,0 +1 @@
+08109     1 lorem_ipsum.txt

tests/fixtures/cksum/untagged/bsd_stdin.expected

@@ -0,0 +1 @@
+08109     1

tests/fixtures/cksum/untagged/crc_multiple_files.expected

@@ -0,0 +1,2 @@
+378294376 772 lorem_ipsum.txt
+3805907707 302 alice_in_wonderland.txt

tests/fixtures/cksum/untagged/crc_single_file.expected

@@ -0,0 +1 @@
+378294376 772 lorem_ipsum.txt

tests/fixtures/cksum/untagged/crc_stdin.expected

@@ -0,0 +1 @@
+378294376 772

tests/fixtures/cksum/untagged/md5_multiple_files.expected

@@ -0,0 +1,2 @@
+cd724690f7dc61775dfac400a71f2caa  lorem_ipsum.txt
+f6fa7033e16166a9589aa1c0388ffd58  alice_in_wonderland.txt

tests/fixtures/cksum/untagged/md5_single_file.expected

@@ -0,0 +1 @@
+cd724690f7dc61775dfac400a71f2caa  lorem_ipsum.txt

tests/fixtures/cksum/untagged/md5_stdin.expected

@@ -0,0 +1 @@
+cd724690f7dc61775dfac400a71f2caa  -

tests/fixtures/cksum/untagged/sha1_multiple_files.expected

@@ -0,0 +1,2 @@
+ab1dd0bae1d8883a3d18a66de6afbd28252cfbef  lorem_ipsum.txt
+22b54b2520e8b4fa59eb10719028a4e587c12d1e  alice_in_wonderland.txt

tests/fixtures/cksum/untagged/sha1_single_file.expected

@@ -0,0 +1 @@
+ab1dd0bae1d8883a3d18a66de6afbd28252cfbef  lorem_ipsum.txt

tests/fixtures/cksum/untagged/sha1_stdin.expected

@@ -0,0 +1 @@
+ab1dd0bae1d8883a3d18a66de6afbd28252cfbef  -

tests/fixtures/cksum/untagged/sha224_multiple_files.expected

@@ -0,0 +1,2 @@
+3de66fbcad106e1b40ab391be56c51d2007eb1f9c655d0f4e29bfc01  lorem_ipsum.txt
+54c9c7d78458886418ce0845111fc49fe1c628ffd4bf3da14226ffd9  alice_in_wonderland.txt

tests/fixtures/cksum/untagged/sha224_single_file.expected

@@ -0,0 +1 @@
+3de66fbcad106e1b40ab391be56c51d2007eb1f9c655d0f4e29bfc01  lorem_ipsum.txt

tests/fixtures/cksum/untagged/sha224_stdin.expected

@@ -0,0 +1 @@
+3de66fbcad106e1b40ab391be56c51d2007eb1f9c655d0f4e29bfc01  -