lorri daemon

Cargo.toml

@@ -19,6 +19,8 @@ notify = "4.0.6"
 serde = "1.0.88"
 serde_derive = "1.0.88"
 serde_json = "1.0.38"
+bincode = "1.1.3"
 tempfile = "3.0.7"
 vec1 = "1.1.0"
 proptest = "0.9.1"
+nix = "0.14.0"

default.nix

@@ -10,7 +10,7 @@ pkgs.rustPlatform.buildRustPackage rec {
   BUILD_REV_COUNT = src.revCount or 1;
   RUN_TIME_CLOSURE = pkgs.callPackage ./nix/runtime.nix {};
 
-  cargoSha256 = "0lx4r05hf3snby5mky7drbnp006dzsg9ypsi4ni5wfl0hffx3a8g";
+  cargoSha256 = "094w2lp6jvxs8j59cjqp6b3kg4y4crlnqka5v2wmq4j0mn6hvhsj";
 
   NIX_PATH = "nixpkgs=${./nix/bogus-nixpkgs}";
 

nix/pre-check.sh

@@ -2,6 +2,9 @@ TEST_ROOT_DEST=${TMPDIR:-/tmp}/nix-test/nix
 mkdir -p $TEST_ROOT_DEST
 TEST_ROOT=$(realpath $TEST_ROOT_DEST)
 
+# prevent us from creating $HOME if it doesn’t exist
+export XDG_CACHE_HOME=${TMPDIR:-/tmp}/nix-test/xdg-cache-dir
+
 export NIX_STORE_DIR=$TEST_ROOT/store
 mkdir -p $NIX_STORE_DIR
 export NIX_LOCALSTATE_DIR=$TEST_ROOT/var

release.nix

@@ -3,8 +3,15 @@
   package = import ./default.nix { inherit src; };
 
   changelog = {
-    # Find the current version number with `git log --prety=%h | wc -l`
+    # Find the current version number with `git log --pretty=%h | wc -l`
     entries = [
+      {
+        version = 171;
+        changes = ''
+          gc_root dirs move from `~/.cache/lorri` to `~/.cache/lorri/gc_roots`.
+          You can delete every file in `~/.cache/lorri`.
+        '';
+       }
       {
         version = 132;
         changes = ''

src/build_loop.rs

@@ -7,6 +7,7 @@ use crate::pathreduction::reduce_paths;
 use crate::roots;
 use crate::roots::Roots;
 use crate::watch::Watch;
+use crate::NixFile;
 use std::collections::HashMap;
 use std::path::PathBuf;
 use std::sync::mpsc::Sender;
@@ -44,7 +45,7 @@ pub struct BuildExitFailure {
 /// Additionally, we create GC roots for the build results.
 pub struct BuildLoop {
     /// A nix source file which can be built
-    nix_root_path: PathBuf,
+    nix_root_path: NixFile,
     roots: Roots,
     /// Watches all input files for changes.
     /// As new input files are discovered, they are added to the watchlist.
@@ -54,7 +55,7 @@ pub struct BuildLoop {
 impl BuildLoop {
     /// Instatiate a new BuildLoop. Uses an internal filesystem
     /// watching implementation.
-    pub fn new(nix_root_path: PathBuf, roots: Roots) -> BuildLoop {
+    pub fn new(nix_root_path: NixFile, roots: Roots) -> BuildLoop {
         BuildLoop {
             nix_root_path,
             roots,

src/builder.rs

@@ -14,12 +14,13 @@ use std::io::{BufRead, BufReader};
 use std::path::PathBuf;
 use std::process::{Command, Stdio};
 use std::thread;
+use NixFile;
 
 /// Builds the Nix expression in `root_nix_file`.
 ///
 /// Instruments the nix file to gain extra information,
 /// which is valuable even if the build fails.
-pub fn run(root_nix_file: &PathBuf) -> Result<Info, Error> {
+pub fn run(root_nix_file: &NixFile) -> Result<Info, Error> {
     // We're looking for log lines matching:
     //
     //     copied source '...' -> '/nix/store/...'
@@ -32,6 +33,7 @@ pub fn run(root_nix_file: &PathBuf) -> Result<Info, Error> {
 
     cmd.args(&[
         "-vv",
+        // TODO: we should pass this as a file instead of a 12k argv string
         "--expr",
         include_str!("./logged-evaluation.nix"),
         "--no-out-link",
@@ -41,7 +43,7 @@ pub fn run(root_nix_file: &PathBuf) -> Result<Info, Error> {
         "--argstr",
         "src",
     ])
-    .arg(root_nix_file)
+    .arg(root_nix_file.as_os_str())
     .stdin(Stdio::null())
     .stdout(Stdio::piped())
     .stderr(Stdio::piped());