don't insist $USER needs to be set

.github/workflows/test.yml

@@ -61,6 +61,11 @@ jobs:
     - uses: actions/checkout@v3
     - name: Install Nix
       uses: ./
+      with:
+        install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
+        install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
+        extra_nix_config: |
+          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
     - run: nix flake show github:NixOS/nixpkgs
 
   installer-options:
@@ -73,9 +78,9 @@ jobs:
     - name: Install Nix
       uses: ./
       with:
-        nix_path: nixpkgs=channel:nixos-22.05
-        install_options: --tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve
-        install_url: https://nixos-nix-install-tests.cachix.org/serve/s62m7lc0q0mz2mxxm9q0kkrcg90njzhq/install
+        nix_path: nixpkgs=channel:nixos-21.05
+        install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
+        install_options: '--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve'
     - run: nix-build test.nix
 
   oldest-supported-installer:
@@ -88,8 +93,8 @@ jobs:
     - name: Install Nix
       uses: ./
       with:
-        nix_path: nixpkgs=channel:nixos-22.05
-        install_url: https://releases.nixos.org/nix/nix-2.8.0/install
+        nix_path: nixpkgs=channel:nixos-21.05
+        install_url: https://releases.nixos.org/nix/nix-2.3.8/install
     - run: nix-build test.nix
 
   act-support:

README.md

@@ -1,24 +1,24 @@
 # install-nix-action
 
-![GitHub Actions badge](https://github.com/cachix/install-nix-action/workflows/install-nix-action%20test/badge.svg)
+![github actions badge](https://github.com/cachix/install-nix-action/workflows/install-nix-action%20test/badge.svg)
 
 Installs [Nix](https://nixos.org/nix/) on GitHub Actions for the supported platforms: Linux and macOS.
 
 By default it has no nixpkgs configured, you have to set `nix_path`
 by [picking a channel](https://status.nixos.org/)
-or [pin nixpkgs yourself](https://nix.dev/reference/pinning-nixpkgs.html)
+or [pin nixpkgs yourself](https://nix.dev/reference/pinning-nixpkgs.html) 
 (see also [pinning tutorial](https://nix.dev/tutorials/towards-reproducibility-pinning-nixpkgs.html)).
 
 # Features
 
 - Quick installation (~4s on Linux, ~20s on macOS)
 - Multi-User installation (with sandboxing enabled only on Linux)
-- [Self-hosted GitHub runner](https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners) support
+- [Self-hosted github runner](https://docs.github.com/en/actions/hosting-your-own-runners/about-self-hosted-runners) support
 - Allows specifying Nix installation URL via `install_url` (the oldest supported Nix version is 2.3.5)
-- Allows specifying extra Nix configuration options via `extra_nix_config`
+- Allows specifying extra Nix configration options via `extra_nix_config`
 - Allows specifying `$NIX_PATH` and channels via `nix_path`
 - Share `/nix/store` between builds using [cachix-action](https://github.com/cachix/cachix-action) for simple binary cache setup to speed up your builds and share binaries with your team
-- Enables `flakes` and `nix-command` experimental features by default (to disable, set `experimental-features` via `extra_nix_config`)
+- Enables `flakes` and `nix-command` experimental features by default (to disable, set ``experimental-features`` via ``extra_nix_config``) 
 
 ## Usage
 
@@ -34,12 +34,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v19
+    - uses: cachix/install-nix-action@v18
       with:
         nix_path: nixpkgs=channel:nixos-unstable
     - run: nix-build
 ```
 
+
 ## Usage with Flakes
 
 ```yaml
@@ -52,7 +53,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v19
+    - uses: cachix/install-nix-action@v18
       with:
         github_access_token: ${{ secrets.GITHUB_TOKEN }}
     - run: nix build
@@ -65,11 +66,11 @@ To install Nix from any commit, go to [the corresponding installer_test action](
 
 - `extra_nix_config`: append to `/etc/nix/nix.conf`
 
-- `github_access_token`: configure Nix to pull from GitHub using the given GitHub token. This helps work around rate limit issues. Has no effect when `access-tokens` is also specified in `extra_nix_config`.
+- `github_access_token`: configure nix to pull from github using the given github token. This helps work around rate limit issues.
 
-- `install_url`: specify URL to install Nix from (useful for testing non-stable releases or pinning Nix, for example https://releases.nixos.org/nix/nix-2.3.7/install)
+- `install_url`: specify URL to install Nix from (useful for testing non-stable releases or pinning Nix for example https://releases.nixos.org/nix/nix-2.3.7/install)
 
-- `install_options`: additional installer flags passed to the installer script.
+- `install_options`: Additional installer flags passed to the installer script.
 
 - `nix_path`: set `NIX_PATH` environment variable, for example `nixpkgs=channel:nixos-unstable`
 
@@ -79,6 +80,7 @@ To install Nix from any commit, go to [the corresponding installer_test action](
 
 ### How do I print nixpkgs version I have configured?
 
+
 ```yaml
 - name: Print nixpkgs version
   run: nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
@@ -120,9 +122,26 @@ Otherwise, you can add any binary cache to nix.conf using
 install-nix-action's own `extra_nix_config` input:
 
 ```yaml
-- uses: cachix/install-nix-action@v19
+- uses: cachix/install-nix-action@v18
   with:
     extra_nix_config: |
       trusted-public-keys = hydra.iohk.io:f/Ea+s+dFdN+3Y/G+FDgSq+a5NEWhJGzdjvKNGv0/EQ= cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=
       substituters = https://hydra.iohk.io https://cache.nixos.org/
 ```
+
+## Hacking
+
+Install the dependencies
+```bash
+$ yarn install
+```
+
+Build the typescript
+```bash
+$ yarn build
+```
+
+Run the tests :heavy_check_mark:
+```bash
+$ yarn test
+```

action.yml

@@ -26,4 +26,3 @@ runs:
         INPUT_INSTALL_OPTIONS: ${{ inputs.install_options }}
         INPUT_INSTALL_URL: ${{ inputs.install_url }}
         INPUT_NIX_PATH: ${{ inputs.nix_path }}
-        GITHUB_TOKEN: ${{ github.token }}

install-nix.sh

@@ -20,12 +20,10 @@ add_config() {
 # Set jobs to number of cores
 add_config "max-jobs = auto"
 # Allow binary caches for user
-add_config "trusted-users = root $USER"
+add_config "trusted-users = root ${USER:-}"
 # Add github access token
-if [[ -n "${INPUT_GITHUB_ACCESS_TOKEN:-}" ]]; then
-  add_config "access-tokens = github.com=$INPUT_GITHUB_ACCESS_TOKEN"
-elif [[ -n "${GITHUB_TOKEN:-}" ]]; then
-  add_config "access-tokens = github.com=$GITHUB_TOKEN"
+if [[ $INPUT_GITHUB_ACCESS_TOKEN != "" ]]; then
+  add_config "access-tokens" "github.com=$INPUT_GITHUB_ACCESS_TOKEN"
 fi
 # Append extra nix configuration if provided
 if [[ $INPUT_EXTRA_NIX_CONFIG != "" ]]; then
@@ -88,7 +86,8 @@ fi
 
 # Set paths
 echo "/nix/var/nix/profiles/default/bin" >> "$GITHUB_PATH"
-echo "/nix/var/nix/profiles/per-user/$USER/profile/bin" >> "$GITHUB_PATH"
+# new path for nix 2.14
+echo "$HOME/.nix-profile/bin" >> "$GITHUB_PATH"
 
 if [[ $INPUT_NIX_PATH != "" ]]; then
   echo "NIX_PATH=${INPUT_NIX_PATH}" >> "$GITHUB_ENV"