Fix various bugs in the tests such that Lix works now

- We were looking for a top-level tarball path that looked like nix-*.
  This was invalid, since our tarballs have lix-*.
- We were looking for a store path that looked like nix-*.*.*. This was
  invalid, since ours is lix-*.*.*.

  This change accepts both.
- We also added a symlink for nix-installer and nix-installer.sh, which
  deals with the test suite being pretty tightly coupled to that path.
- We fixed a bug exposed in the tests where --no-substitute is not
  passed while self-testing builds. This seems to have been relying on
  offline detection and while it eventually passed, it was busted and
  took ages.

Change-Id: I2f497bd647ecf1db5963a4bb245279db582d2af3

flake.nix

@@ -95,6 +95,8 @@
             };
             postInstall = ''
               cp lix-installer.sh $out/bin/lix-installer.sh
+              ln -s lix-installer $out/bin/nix-installer
+              ln -s lix-installer.sh $out/bin/nix-installer.sh
             '';
           };
         in

nix/tests/container-test/default/Dockerfile

@@ -2,7 +2,7 @@ FROM default
 COPY lix-installer /lix-installer
 RUN chmod +x /lix-installer
 COPY binary-tarball /binary-tarball
-RUN mv /binary-tarball/nix-*.tar.xz nix.tar.xz
+RUN mv /binary-tarball/[nl]ix-*.tar.xz nix.tar.xz
 RUN /lix-installer/bin/lix-installer install linux --logger pretty --log-directive lix_installer=debug --nix-package-url file:///nix.tar.xz --init none --extra-conf "sandbox = false" --no-confirm -vvv
 ENV PATH="${PATH}:/nix/var/nix/profiles/default/bin"
 RUN nix-build --no-substitute -E 'derivation { name = "foo"; system = "x86_64-linux"; builder = "/bin/sh"; args = ["-c" "echo foobar > $out"]; }'

nix/tests/vm-test/default.nix

@@ -576,7 +576,7 @@ let
         scp -P 20022 $ssh_opts $installer/bin/lix-installer vagrant@localhost:nix-installer
 
         echo "Copying nix tarball..."
-        scp -P 20022 $ssh_opts $binaryTarball/nix-*.tar.xz vagrant@localhost:nix.tar.xz
+        scp -P 20022 $ssh_opts $binaryTarball/lix-*.tar.xz vagrant@localhost:nix.tar.xz
 
         echo "Running preinstall..."
         $ssh "set -eux; $preinstallScript"

src/action/base/move_unpacked_nix.rs

@@ -6,8 +6,9 @@ use std::{
 use tracing::{span, Span};
 use walkdir::WalkDir;
 
-use crate::action::{
-    Action, ActionDescription, ActionError, ActionErrorKind, ActionTag, StatefulAction,
+use crate::{
+    action::{Action, ActionDescription, ActionError, ActionErrorKind, ActionTag, StatefulAction},
+    release_tarball,
 };
 
 pub(crate) const DEST: &str = "/nix/";
@@ -62,15 +63,9 @@ impl Action for MoveUnpackedNix {
         let Self { unpacked_path } = self;
 
         // This is the `nix-$VERSION` folder which unpacks from the tarball, not a nix derivation
-        let found_nix_paths = glob::glob(&format!("{}/nix-*", unpacked_path.display()))
-            .map_err(|e| Self::error(MoveUnpackedNixError::from(e)))?
-            .collect::<Result<Vec<_>, _>>()
-            .map_err(|e| Self::error(MoveUnpackedNixError::from(e)))?;
-        if found_nix_paths.len() != 1 {
-            return Err(Self::error(ActionErrorKind::MalformedBinaryTarball));
-        }
-        let found_nix_path = found_nix_paths.into_iter().next().unwrap();
-        let src_store = found_nix_path.join("store");
+        let toplevel_path =
+            release_tarball::find_toplevel_path(&unpacked_path).map_err(Self::error)?;
+        let src_store = toplevel_path.join("store");
         let mut src_store_listing = tokio::fs::read_dir(src_store.clone())
             .await
             .map_err(|e| ActionErrorKind::ReadDir(src_store.clone(), e))

src/action/base/setup_default_profile.rs

@@ -2,7 +2,7 @@ use std::path::PathBuf;
 
 use crate::{
     action::{ActionError, ActionErrorKind, ActionTag, StatefulAction},
-    execute_command, set_env,
+    execute_command, release_tarball, set_env,
 };
 
 use glob::glob;
@@ -51,8 +51,10 @@ impl Action for SetupDefaultProfile {
 
     #[tracing::instrument(level = "debug", skip_all)]
     async fn execute(&mut self) -> Result<(), ActionError> {
-        // Find an `nix` package
-        let nix_pkg_glob = format!("{}/nix-*/store/*-nix-*.*.*", self.unpacked_path.display());
+        let toplevel_path =
+            release_tarball::find_toplevel_path(&self.unpacked_path).map_err(Self::error)?;
+        // Find a `nix` package
+        let nix_pkg_glob = format!("{}/store/*-[nl]ix-*.*.*", toplevel_path.display());
         let mut found_nix_pkg = None;
         for entry in glob(&nix_pkg_glob).map_err(Self::error)? {
             match entry {
@@ -78,10 +80,7 @@ impl Action for SetupDefaultProfile {
         };
 
         // Find an `nss-cacert` package, add it too.
-        let nss_ca_cert_pkg_glob = format!(
-            "{}/nix-*/store/*-nss-cacert-*.*",
-            self.unpacked_path.display()
-        );
+        let nss_ca_cert_pkg_glob = format!("{}/store/*-nss-cacert-*.*", toplevel_path.display());
         let mut found_nss_ca_cert_pkg = None;
         for entry in glob(&nss_ca_cert_pkg_glob).map_err(Self::error)? {
             match entry {
@@ -108,14 +107,8 @@ impl Action for SetupDefaultProfile {
             return Err(Self::error(SetupDefaultProfileError::NoNssCacert));
         };
 
-        let found_nix_paths = glob::glob(&format!("{}/nix-*", self.unpacked_path.display()))
-            .map_err(Self::error)?
-            .collect::<Result<Vec<_>, _>>()
-            .map_err(Self::error)?;
-        if found_nix_paths.len() != 1 {
-            return Err(Self::error(ActionErrorKind::MalformedBinaryTarball));
-        }
-        let found_nix_path = found_nix_paths.into_iter().next().unwrap();
+        let found_nix_path =
+            release_tarball::find_toplevel_path(&self.unpacked_path).map_err(Self::error)?;
         let reginfo_path = found_nix_path.join(".reginfo");
         let reginfo = tokio::fs::read(&reginfo_path)
             .await

src/action/mod.rs

@@ -488,10 +488,7 @@ pub enum ActionErrorKind {
             "".to_string()
         }
     )]
-    CommandOutput {
-        command: String,
-        output: Output,
-    },
+    CommandOutput { command: String, output: Output },
     #[error("Joining spawned async task")]
     Join(
         #[source]
@@ -509,7 +506,7 @@ pub enum ActionErrorKind {
     /// A MacOS (Darwin) plist related error
     #[error(transparent)]
     Plist(#[from] plist::Error),
-    #[error("Unexpected binary tarball contents found, the build result from `https://releases.nixos.org/?prefix=nix/` or `nix build nix#hydraJobs.binaryTarball.$SYSTEM` is expected")]
+    #[error("Unexpected binary tarball contents found, the build result from `https://releases.lix.systems/?prefix=nix/` or `nix build lix#hydraJobs.binaryTarball.$SYSTEM` is expected")]
     MalformedBinaryTarball,
     #[error("Could not find `{0}` in PATH; This action only works on SteamOS, which should have this present in PATH.")]
     MissingSteamosBinary(String),

src/cli/mod.rs

@@ -20,9 +20,9 @@ pub trait CommandExecute {
 }
 
 /**
-The Determinate Nix installer (lix variant)
+The Lix installer.
 
-A fast, friendly, and reliable tool to help you use Nix with Flakes everywhere.
+A fast, friendly, and reliable tool to help you install CppNix or Lix on your system.
 */
 #[derive(Debug, Parser)]
 #[clap(version)]

src/lib.rs

@@ -76,6 +76,7 @@ mod error;
 mod os;
 mod plan;
 pub mod planner;
+mod release_tarball;
 pub mod self_test;
 pub mod settings;
 

src/release_tarball.rs

@@ -0,0 +1,17 @@
+use std::path::{Path, PathBuf};
+
+use crate::action::ActionErrorKind;
+
+/// Finds the top-level path in the tarball, e.g. lix-2.90.0-rc1-x86_64-linux
+pub fn find_toplevel_path(unpacked_path: &Path) -> Result<PathBuf, ActionErrorKind> {
+    let found_nix_paths = glob::glob(&format!("{}/[nl]ix-*", unpacked_path.display()))
+        .map_err(ActionErrorKind::from)?
+        .collect::<Result<Vec<_>, _>>()
+        .map_err(ActionErrorKind::from)?;
+    if found_nix_paths.len() != 1 {
+        return Err(ActionErrorKind::MalformedBinaryTarball);
+    }
+    let found_nix_path = found_nix_paths.into_iter().next().unwrap();
+
+    Ok(found_nix_path)
+}

src/self_test.rs

@@ -86,7 +86,7 @@ impl Shell {
             .as_millis();
 
         command.arg(format!(
-            r#"nix build --no-link --expr 'derivation {{ name = "self-test-{executable}-{timestamp_millis}"; system = "{SYSTEM}"; builder = "/bin/sh"; args = ["-c" "echo hello > \$out"]; }}'"#
+            r#"nix build --no-substitute --no-link --expr 'derivation {{ name = "self-test-{executable}-{timestamp_millis}"; system = "{SYSTEM}"; builder = "/bin/sh"; args = ["-c" "echo hello > \$out"]; }}'"#
         ));
         let command_str = format!("{:?}", command.as_std());