1 files changed, 160 insertions, 0 deletions
diff --git a/users/Profpatsch/netencode/default.nix b/users/Profpatsch/netencode/default.nix
new file mode 100644
index 000000000000..d38925814832
--- /dev/null
+++ b/users/Profpatsch/netencode/default.nix
@@ -0,0 +1,160 @@
+{ depot, pkgs, lib, ... }:
+
+let
+  netencode-rs = depot.nix.writers.rustSimpleLib
+    {
+      name = "netencode";
+      dependencies = [
+        depot.third_party.rust-crates.nom
+        depot.users.Profpatsch.execline.exec-helpers
+      ];
+    }
+    (builtins.readFile ./netencode.rs);
+
+  gen = import ./gen.nix { inherit lib; };
+
+  pretty-rs = depot.nix.writers.rustSimpleLib
+    {
+      name = "netencode-pretty";
+      dependencies = [
+        netencode-rs
+      ];
+    }
+    (builtins.readFile ./pretty.rs);
+
+  pretty = depot.nix.writers.rustSimple
+    {
+      name = "netencode-pretty";
+      dependencies = [
+        netencode-rs
+        pretty-rs
+        depot.users.Profpatsch.execline.exec-helpers
+      ];
+    } ''
+    extern crate netencode;
+    extern crate netencode_pretty;
+    extern crate exec_helpers;
+
+    fn main() {
+      let (_, prog) = exec_helpers::args_for_exec("netencode-pretty", 0);
+      let mut buf = vec![];
+      let u = netencode::u_from_stdin_or_die_user_error("netencode-pretty", &mut buf);
+      match netencode_pretty::Pretty::from_u(u).print_multiline(&mut std::io::stdout()) {
+        Ok(()) => {},
+        Err(err) => exec_helpers::die_temporary("netencode-pretty", format!("could not write to stdout: {}", err))
+      }
+    }
+  '';
+
+  netencode-mustache = depot.nix.writers.rustSimple
+    {
+      name = "netencode_mustache";
+      dependencies = [
+        depot.users.Profpatsch.arglib.netencode.rust
+        netencode-rs
+        depot.third_party.rust-crates.mustache
+      ];
+    }
+    (builtins.readFile ./netencode-mustache.rs);
+
+
+  record-get = depot.nix.writers.rustSimple
+    {
+      name = "record-get";
+      dependencies = [
+        netencode-rs
+        depot.users.Profpatsch.execline.exec-helpers
+        depot.users.Profpatsch.arglib.netencode.rust
+      ];
+    } ''
+    extern crate netencode;
+    extern crate arglib_netencode;
+    extern crate exec_helpers;
+    use netencode::{encode, dec};
+    use netencode::dec::{Decoder, DecodeError};
+
+    fn main() {
+        let mut buf = vec![];
+        let args = exec_helpers::args("record-get", 1);
+        let field = match std::str::from_utf8(&args[0]) {
+            Ok(f) => f,
+            Err(_e) => exec_helpers::die_user_error("record-get", format!("The field name needs to be valid unicode"))
+        };
+        let u = netencode::u_from_stdin_or_die_user_error("record-get", &mut buf);
+        match (dec::RecordDot {field, inner: dec::AnyU }).dec(u) {
+            Ok(u) => encode(&mut std::io::stdout(), &u).expect("encoding to stdout failed"),
+            Err(DecodeError(err)) => exec_helpers::die_user_error("record-get", err)
+        }
+    }
+  '';
+
+  record-splice-env = depot.nix.writers.rustSimple
+    {
+      name = "record-splice-env";
+      dependencies = [
+        netencode-rs
+        depot.users.Profpatsch.execline.exec-helpers
+      ];
+    } ''
+    extern crate netencode;
+    extern crate exec_helpers;
+    use netencode::dec::{Record, Try, ScalarAsBytes, Decoder, DecodeError};
+
+    fn main() {
+        let mut buf = vec![];
+        let u = netencode::u_from_stdin_or_die_user_error("record-splice-env", &mut buf);
+        let (_, prog) = exec_helpers::args_for_exec("record-splice-env", 0);
+        match Record(Try(ScalarAsBytes)).dec(u) {
+            Ok(map) => {
+                exec_helpers::exec_into_args(
+                    "record-splice-env",
+                    prog,
+                    // some elements can’t be decoded as scalars, so just ignore them
+                    map.into_iter().filter_map(|(k, v)| v.map(|v2| (k, v2)))
+                );
+            },
+            Err(DecodeError(err)) => exec_helpers::die_user_error("record-splice-env", err),
+        }
+    }
+  '';
+
+  env-splice-record = depot.nix.writers.rustSimple
+    {
+      name = "env-splice-record";
+      dependencies = [
+        netencode-rs
+        depot.users.Profpatsch.execline.exec-helpers
+      ];
+    } ''
+    extern crate netencode;
+    extern crate exec_helpers;
+    use netencode::{T};
+    use std::os::unix::ffi::OsStringExt;
+
+    fn main() {
+        exec_helpers::no_args("env-splice-record");
+        let mut res = std::collections::HashMap::new();
+        for (key, val) in std::env::vars_os() {
+          match (String::from_utf8(key.into_vec()), String::from_utf8(val.into_vec())) {
+            (Ok(k), Ok(v)) => { let _ = res.insert(k, T::Text(v)); },
+            // same as in record-splice-env, we ignore non-utf8 variables
+            (_, _) => {},
+          }
+        }
+        netencode::encode(&mut std::io::stdout(), &T::Record(res).to_u()).unwrap()
+    }
+  '';
+
+in
+depot.nix.readTree.drvTargets {
+  inherit
+    netencode-rs
+    pretty-rs
+    pretty
+    netencode-mustache
+    record-get
+    record-splice-env
+    env-splice-record
+    gen
+    ;
+}