wait for nix-daemon socket

Turn on daemon (multi-user) mode

.github/workflows/test.yml

@@ -17,4 +17,8 @@ jobs:
     - run: yarn test
     - name: Install Nix
       uses: ./
-    - run: nix-build test.nix
+    - 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
+    - run: cachix use cachix
+    - run: nix-build test.nix

lib/main.js

@@ -20,35 +20,52 @@ const core = __importStar(require("@actions/core"));
 const exec = __importStar(require("@actions/exec"));
 const tc = __importStar(require("@actions/tool-cache"));
 const os_1 = require("os");
-const fs_1 = require("fs");
+function nixConf() {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Workaround a segfault: https://github.com/NixOS/nix/issues/2733
+        yield exec.exec("sudo", ["mkdir", "-p", "/etc/nix"]);
+        yield exec.exec("sudo", ["sh", "-c", "echo http2 = false >> /etc/nix/nix.conf"]);
+        // Set jobs to number of cores
+        yield exec.exec("sudo", ["sh", "-c", "echo max-jobs = auto >> /etc/nix/nix.conf"]);
+        // Allow binary caches for runner user
+        yield exec.exec("sudo", ["sh", "-c", "echo trusted-users = root runner >> /etc/nix/nix.conf"]);
+    });
+}
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            const home = os_1.homedir();
-            const { username } = os_1.userInfo();
             const PATH = process.env.PATH;
             const INSTALL_PATH = '/opt/nix';
-            const CERTS_PATH = home + '/.nix-profile/etc/ssl/certs/ca-bundle.crt';
+            yield nixConf();
-            // Workaround a segfault: https://github.com/NixOS/nix/issues/2733
-            yield exec.exec("sudo", ["mkdir", "-p", "/etc/nix"]);
-            yield exec.exec("sudo", ["sh", "-c", "echo http2 = false >> /etc/nix/nix.conf"]);
-            // Set jobs to number of cores
-            yield exec.exec("sudo", ["sh", "-c", "echo max-jobs = auto >> /etc/nix/nix.conf"]);
             // Catalina workaround https://github.com/NixOS/nix/issues/2925
             if (os_1.type() == "Darwin") {
                 yield exec.exec("sudo", ["sh", "-c", `echo \"nix\t${INSTALL_PATH}\"  >> /etc/synthetic.conf`]);
                 yield exec.exec("sudo", ["sh", "-c", `mkdir -m 0755 ${INSTALL_PATH} && chown runner ${INSTALL_PATH}`]);
                 yield exec.exec("/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs.util", ["-B"]);
+                // Needed for sudo to pass NIX_IGNORE_SYMLINK_STORE
+                yield exec.exec("sudo", ["sh", "-c", "echo 'Defaults env_keep += NIX_IGNORE_SYMLINK_STORE'  >> /etc/sudoers"]);
                 core.exportVariable('NIX_IGNORE_SYMLINK_STORE', "1");
+                // Needed for nix-daemon installation
+                yield exec.exec("sudo", ["launchctl", "setenv", "NIX_IGNORE_SYMLINK_STORE", "1"]);
             }
+            // Needed due to multi-user being too defensive
+            core.exportVariable('ALLOW_PREEXISTING_INSTALLATION', "1");
             // TODO: retry due to all the things that go wrong
             const nixInstall = yield tc.downloadTool('https://nixos.org/nix/install');
-            yield exec.exec("sh", [nixInstall]);
+            yield exec.exec("sh", [nixInstall, "--daemon"]);
-            core.exportVariable('PATH', `${PATH}:${home}/.nix-profile/bin`);
+            // write nix.conf again as installation overwrites it, reload the daemon to pick up changes
-            core.exportVariable('NIX_PATH', `/nix/var/nix/profiles/per-user/${username}/channels`);
+            yield nixConf();
-            // macOS needs certificates hints
+            yield exec.exec("sudo", ["pkill", "-HUP", "nix-daemon"]);
-            if (fs_1.existsSync(CERTS_PATH)) {
+            // setup env
-                core.exportVariable('NIX_SSL_CERT_FILE', CERTS_PATH);
+            core.exportVariable('PATH', `${PATH}:/nix/var/nix/profiles/default/bin:/nix/var/nix/profiles/per-user/runner/profile/bin`);
+            core.exportVariable('NIX_PATH', `/nix/var/nix/profiles/per-user/root/channels`);
+            if (os_1.type() == "Darwin") {
+                // macOS needs certificates hints
+                core.exportVariable('NIX_SSL_CERT_FILE', '/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt');
+                // TODO: nc doesn't work correctly on macOS :(
+                //await exec.exec("sh", ["-c", "while ! nc -zU /nix/var/nix/daemon-socket/socket; do sleep 0.5; done"]);
+                // macOS needs time to reload the daemon :(
+                yield exec.exec("sleep", ["10"]);
             }
         }
         catch (error) {

src/main.ts

@@ -1,17 +1,9 @@
 import * as core from '@actions/core';
 import * as exec from '@actions/exec';
 import * as tc from '@actions/tool-cache';
-import {homedir, userInfo, type} from 'os';
+import {type} from 'os';
-import {existsSync} from 'fs';
-
-async function run() {
-  try {
-    const home = homedir();
-    const {username} = userInfo();
-    const PATH = process.env.PATH;  
-    const INSTALL_PATH = '/opt/nix';
-    const CERTS_PATH = home + '/.nix-profile/etc/ssl/certs/ca-bundle.crt';
 
+async function nixConf() {
     // Workaround a segfault: https://github.com/NixOS/nix/issues/2733
     await exec.exec("sudo", ["mkdir", "-p", "/etc/nix"]);
     await exec.exec("sudo", ["sh", "-c", "echo http2 = false >> /etc/nix/nix.conf"]);
@@ -19,24 +11,54 @@ async function run() {
     // Set jobs to number of cores
     await exec.exec("sudo", ["sh", "-c", "echo max-jobs = auto >> /etc/nix/nix.conf"]);
 
+    // Allow binary caches for runner user
+    await exec.exec("sudo", ["sh", "-c", "echo trusted-users = root runner >> /etc/nix/nix.conf"]);
+}
+
+async function run() {
+  try {
+    const PATH = process.env.PATH;  
+    const INSTALL_PATH = '/opt/nix';
+ 
+    await nixConf();
+
     // Catalina workaround https://github.com/NixOS/nix/issues/2925
     if (type() == "Darwin") {
       await exec.exec("sudo", ["sh", "-c", `echo \"nix\t${INSTALL_PATH}\"  >> /etc/synthetic.conf`]);
       await exec.exec("sudo", ["sh", "-c", `mkdir -m 0755 ${INSTALL_PATH} && chown runner ${INSTALL_PATH}`]);
       await exec.exec("/System/Library/Filesystems/apfs.fs/Contents/Resources/apfs.util", ["-B"]);
-      core.exportVariable('NIX_IGNORE_SYMLINK_STORE', "1");  
+
+      // Needed for sudo to pass NIX_IGNORE_SYMLINK_STORE
+      await exec.exec("sudo", ["sh", "-c", "echo 'Defaults env_keep += NIX_IGNORE_SYMLINK_STORE'  >> /etc/sudoers"]);
+      core.exportVariable('NIX_IGNORE_SYMLINK_STORE', "1");
+      // Needed for nix-daemon installation
+      await exec.exec("sudo", ["launchctl", "setenv", "NIX_IGNORE_SYMLINK_STORE", "1"]);
     }
 
+    // Needed due to multi-user being too defensive
+    core.exportVariable('ALLOW_PREEXISTING_INSTALLATION', "1"); 
+
     // TODO: retry due to all the things that go wrong
     const nixInstall = await tc.downloadTool('https://nixos.org/nix/install');
-    await exec.exec("sh", [nixInstall]);
+    await exec.exec("sh", [nixInstall, "--daemon"]);
-    core.exportVariable('PATH', `${PATH}:${home}/.nix-profile/bin`)
-    core.exportVariable('NIX_PATH', `/nix/var/nix/profiles/per-user/${username}/channels`)
 
-    // macOS needs certificates hints
+    // write nix.conf again as installation overwrites it, reload the daemon to pick up changes
-    if (existsSync(CERTS_PATH)) {
+    await nixConf();
-      core.exportVariable('NIX_SSL_CERT_FILE', CERTS_PATH);
+    await exec.exec("sudo", ["pkill", "-HUP", "nix-daemon"]);
+
+    // setup env
+    core.exportVariable('PATH', `${PATH}:/nix/var/nix/profiles/default/bin:/nix/var/nix/profiles/per-user/runner/profile/bin`)
+    core.exportVariable('NIX_PATH', `/nix/var/nix/profiles/per-user/root/channels`)
+    if (type() == "Darwin") {
+      // macOS needs certificates hints
+      core.exportVariable('NIX_SSL_CERT_FILE', '/nix/var/nix/profiles/default/etc/ssl/certs/ca-bundle.crt');
+
+      // TODO: nc doesn't work correctly on macOS :(
+      //await exec.exec("sh", ["-c", "while ! nc -zU /nix/var/nix/daemon-socket/socket; do sleep 0.5; done"]);
+      // macOS needs time to reload the daemon :(
+      await exec.exec("sleep", ["10"]);
     }
+
   } catch (error) {
     core.setFailed(`Action failed with error: ${error}`);
     throw(error);