Add NIX_PATH action input

.github/workflows/test.yml

@@ -2,12 +2,20 @@ name: "install-nix-action test"
 on:
   pull_request:
   push:
+
 jobs:
   tests:
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-18.04, macos-latest]
+        nixPath:
+          -
+          - nixpkgs=channel:nixos-unstable
+          - nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz
+
     runs-on: ${{ matrix.os }}
+
     steps:
     - uses: actions/checkout@v1
     - run: yarn install --frozen-lockfile
@@ -17,6 +25,8 @@ jobs:
     - run: yarn test
     - name: Install Nix
       uses: ./
+      with:
+        NIX_PATH: ${{ matrix.nixPath }}
     - run: nix-env -iA cachix -f https://github.com/NixOS/nixpkgs/tarball/ab5863afada3c1b50fc43bf774b75ea71b287cde
     - run: cat /etc/nix/nix.conf
     # cachix should be available and be able to configure a cache

README.md

@@ -19,6 +19,8 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: cachix/install-nix-action@v8
+      with:
+        NIX_PATH: nixpkgs=channel:nixos-unstable
     - run: nix-build
 ```
 

action.yml

@@ -1,6 +1,10 @@
 name: 'Install Nix'
 description: 'Installs Nix on GitHub Actions for the supported platforms: Linux and macOS.'
 author: 'Domen Kožar'
+inputs:
+  NIX_PATH:
+    description: 'Set NIX_PATH environment variable'
+    required: false
 branding:
   color: 'blue'
   icon: 'sun'

lib/install-nix.sh

@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
+nixPath="${1:-/nix/var/nix/profiles/per-user/root/channels}"
+
 export here=$(dirname "${BASH_SOURCE[0]}")
 
 nixConf() {
@@ -45,4 +47,4 @@ sudo pkill -HUP nix-daemon
 # Set paths
 echo "::add-path::/nix/var/nix/profiles/per-user/runner/profile/bin"
 echo "::add-path::/nix/var/nix/profiles/default/bin"
-echo "::set-env name=NIX_PATH::/nix/var/nix/profiles/per-user/root/channels"
+echo "::set-env name=NIX_PATH::${nixPath}"

lib/main.js

@@ -12,6 +12,7 @@ Object.defineProperty(exports, "__esModule", { value: true });
 const child_process_1 = require("child_process");
 const process_1 = require("process");
 const net_1 = require("net");
+const core_1 = require("@actions/core");
 function awaitSocket() {
     return __awaiter(this, void 0, void 0, function* () {
         const daemonSocket = net_1.createConnection({ path: '/nix/var/nix/daemon-socket/socket' });
@@ -25,6 +26,6 @@ function awaitSocket() {
         });
     });
 }
-child_process_1.execFileSync(`${__dirname}/install-nix.sh`, { stdio: 'inherit' });
+child_process_1.execFileSync(`${__dirname}/install-nix.sh`, [core_1.getInput('NIX_PATH')], { stdio: 'inherit' });
 // nc doesn't work correctly on macOS :(
 awaitSocket();

src/main.ts

@@ -1,6 +1,7 @@
 import { execFileSync } from 'child_process';
 import { exit } from 'process';
 import { createConnection } from 'net';
+import { getInput } from '@actions/core';
 
 async function awaitSocket() {
   const daemonSocket = createConnection({ path: '/nix/var/nix/daemon-socket/socket' });
@@ -14,7 +15,7 @@ async function awaitSocket() {
   });
 }
 
-execFileSync(`${__dirname}/install-nix.sh`, { stdio: 'inherit' });
+execFileSync(`${__dirname}/install-nix.sh`, [getInput('NIX_PATH')], { stdio: 'inherit' });
 
 // nc doesn't work correctly on macOS :(
 awaitSocket();