bins: Add after_text for RAYON_NUM_THREADS

common/common.rs

@@ -1,6 +1,6 @@
 // Compiled for every binary, as this is not a workspce. Don't put many functinos in this file
 
-pub fn after_help() -> String {
+pub fn after_help(rayon_env: bool) -> String {
     let mut s = "Decompressors available:\n".to_string();
 
     #[cfg(feature = "gzip")]
@@ -15,7 +15,13 @@ pub fn after_help() -> String {
     #[cfg(feature = "zstd")]
     s.push_str("\tzstd\n");
 
-    s.push_str("\nEnvironment Variables:\n\t");
-    s.push_str(r#"RUST_LOG: See "https://docs.rs/tracing-subscriber/latest/tracing_subscriber/fmt/index.html#filtering-events-with-environment-variables""#);
+    s.push_str("\nEnvironment Variables:\n");
+    s.push_str("  RUST_LOG:");
+    s.push_str(r#"    "https://docs.rs/tracing-subscriber/latest/tracing_subscriber/fmt/index.html#filtering-events-with-environment-variables""#);
+    if rayon_env {
+        s.push('\n');
+        s.push_str("  RAYON_NUM_THREADS:");
+        s.push_str(r#"  "https://docs.rs/rayon/latest/rayon/struct.ThreadPoolBuilder.html#method.num_threads""#);
+    }
     s
 }

src/bin/add.rs

@@ -20,7 +20,7 @@ static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
 #[command(author,
           version,
           name = "add-backhand",
-          after_help = after_help(),
+          after_help = after_help(false),
           max_term_width = 98,
 )]
 struct Args {

src/bin/replace.rs

@@ -19,7 +19,7 @@ static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
 #[command(author,
           version,
           name = "replace-backhand",
-          after_help = after_help(),
+          after_help = after_help(false),
           max_term_width = 98,
 )]
 struct Args {

src/bin/unsquashfs.rs

@@ -84,7 +84,7 @@ pub fn failed(pb: &ProgressBar, s: &str) {
 #[command(author,
           version,
           name = "unsquashfs-backhand",
-          after_help = after_help(),
+          after_help = after_help(true),
           max_term_width = 98,
 )]
 struct Args {