Adding upstream version 0.5.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

build/src_writer.rs

@@ -0,0 +1,70 @@
+use std::io::Write as _;
+use std::path::PathBuf;
+
+use crate::openssh::MyPrefs;
+
+pub fn write_source(prefs: MyPrefs) -> anyhow::Result<()> {
+    let SrcPaths { src_dir, src_path } = src_path();
+
+    // create dir
+    if !src_dir.exists() {
+        std::fs::create_dir_all(&src_dir)?;
+    }
+
+    // open file
+    let mut file = std::fs::File::create(src_path)?;
+
+    writeln!(
+        file,
+        r#"//! This file is autogenerated at build-time when `RELOAD_SSH_ALGO` is set to environment."#
+    )?;
+    writeln!(file)?;
+
+    writeln!(file, "use crate::DefaultAlgorithms;")?;
+    writeln!(file,)?;
+
+    writeln!(file, r#"/// Default algorithms for ssh."#)?;
+    writeln!(file, r#"pub fn defaults() -> DefaultAlgorithms {{"#)?;
+    writeln!(file, r#"    DefaultAlgorithms {{"#)?;
+    write_vec(
+        &mut file,
+        "ca_signature_algorithms",
+        &prefs.ca_signature_algorithms,
+    )?;
+    write_vec(&mut file, "ciphers", &prefs.ciphers)?;
+    write_vec(&mut file, "host_key_algorithms", &prefs.host_key_algorithms)?;
+    write_vec(&mut file, "kex_algorithms", &prefs.kex_algorithms)?;
+    write_vec(&mut file, "mac", &prefs.mac)?;
+    write_vec(
+        &mut file,
+        "pubkey_accepted_algorithms",
+        &prefs.pubkey_accepted_algorithms,
+    )?;
+    writeln!(file, r#"    }}"#)?;
+    writeln!(file, r#"}}"#)?;
+
+    Ok(())
+}
+
+fn write_vec(file: &mut std::fs::File, name: &str, vec: &[String]) -> anyhow::Result<()> {
+    writeln!(file, r#"        {name}: vec!["#)?;
+    for item in vec {
+        writeln!(file, r#"            {item}.to_string(),"#,)?;
+    }
+    writeln!(file, r#"        ],"#)?;
+    Ok(())
+}
+
+struct SrcPaths {
+    src_dir: PathBuf,
+    src_path: PathBuf,
+}
+
+fn src_path() -> SrcPaths {
+    let src_dir = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
+        .join("src")
+        .join("default_algorithms");
+    let src_path = src_dir.join("openssh.rs");
+
+    SrcPaths { src_dir, src_path }
+}