r-k-b · September 3, 2024 10:14 · Mar 9, 2021 · Feb 15, 2021 · Jan 21, 2021 · Jan 21, 2021
diff --git a/shell.nix b/shell.nix
@@ -10,6 +10,6 @@ in pkgs.mkShell {
 
   shellHook = ''
     export CYPRESS_INSTALL_BINARY=0
-    export CYPRESS_RUN_BINARY=$(which Cypress)
+    export CYPRESS_RUN_BINARY=${pkgs.cypress}/bin/Cypress
   '';
 }
diff --git a/cypress-overlay.nix b/cypress-overlay.nix
@@ -8,11 +8,16 @@ final: prev: {
     installPhase = let
       old = "copyExtension(pathToExtension, extensionDest)";
       # This has only been tested against Cypress 6.0.0!
-      new =
+      newForChrome =
         "copyExtension(pathToExtension, extensionDest).then(() => fs_1.default.chmodAsync(extensionBg, 0o0644))";
+      newForFirefox =
+        "copyExtension(pathToExtension, extensionDest).then(() => fs.chmodAsync(extensionBg, 0o0644))";
     in ''
-      sed -i 's/${old}/${new}/' \
+      sed -i 's/${old}/${newForChrome}/' \
           ./resources/app/packages/server/lib/browsers/chrome.js
+
+      sed -i 's/${old}/${newForFirefox}/' \
+          ./resources/app/packages/server/lib/browsers/utils.js
     '' + oldAttrs.installPhase;
   });
 }
diff --git a/shell.nix b/shell.nix
@@ -13,4 +13,3 @@ in pkgs.mkShell {
     export CYPRESS_RUN_BINARY=$(which Cypress)
   '';
 }
-
diff --git a/cypress-overlay.nix b/cypress-overlay.nix
@@ -1,3 +1,8 @@
+# When Cypress starts, it copies some files into `~/.config/Cypress/cy/production/browsers/chrome-stable/interactive/CypressExtension/`
+# from the Nix Store, one of which it attempts to modify immediately after.
+# As-is, this fails because the copied file keeps the read-only flag it had in
+# the Store.
+# Luckily, the code responsible is a plain text script that we can easily patch:
 final: prev: {
   cypress = prev.cypress.overrideAttrs (oldAttrs: {
     installPhase = let

diff --git a/_use nixpkgs cypress binary before npms broken copy.md b/_use nixpkgs cypress binary before npms broken copy.md
@@ -45,5 +45,5 @@ Cypress Version: 6.2.1
 EACCES: permission denied, open '/home/rkb/.config/Cypress/cy/production/browsers/chrome-stable/interactive/CypressExtension/background.js'
 ```
 
-apply [this patch](https://github.com/cypress-io/cypress/pull/5579/files) to [Cypress](https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/development/web/cypress/default.nix) from within the shell.nix
-(or get it upstreamed?)
+~~apply [this patch](https://github.com/cypress-io/cypress/pull/5579/files) to [Cypress](https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/development/web/cypress/default.nix) from within the shell.nix
+(or get it upstreamed?)~~ done. Super hacky, but done!
diff --git a/cypress-overlay.nix b/cypress-overlay.nix
@@ -2,6 +2,7 @@ final: prev: {
   cypress = prev.cypress.overrideAttrs (oldAttrs: {
     installPhase = let
       old = "copyExtension(pathToExtension, extensionDest)";
+      # This has only been tested against Cypress 6.0.0!
       new =
         "copyExtension(pathToExtension, extensionDest).then(() => fs_1.default.chmodAsync(extensionBg, 0o0644))";
     in ''

diff --git a/cypress-overlay.nix b/cypress-overlay.nix
@@ -0,0 +1,12 @@
+final: prev: {
+  cypress = prev.cypress.overrideAttrs (oldAttrs: {
+    installPhase = let
+      old = "copyExtension(pathToExtension, extensionDest)";
+      new =
+        "copyExtension(pathToExtension, extensionDest).then(() => fs_1.default.chmodAsync(extensionBg, 0o0644))";
+    in ''
+      sed -i 's/${old}/${new}/' \
+          ./resources/app/packages/server/lib/browsers/chrome.js
+    '' + oldAttrs.installPhase;
+  });
+}
diff --git a/shell.nix b/shell.nix
@@ -1,6 +1,5 @@
-{ pkgs ? import <nixpkgs> { } }:
-
-pkgs.mkShell {
+let pkgs = import <nixpkgs> { overlays = [ (import ./cypress-overlay.nix) ]; };
+in pkgs.mkShell {
   name = "cypress-example";
 
   buildInputs = with pkgs; [

diff --git a/_use nixpkgs cypress binary before npms broken copy.md b/_use nixpkgs cypress binary before npms broken copy.md
@@ -45,5 +45,5 @@ Cypress Version: 6.2.1
 EACCES: permission denied, open '/home/rkb/.config/Cypress/cy/production/browsers/chrome-stable/interactive/CypressExtension/background.js'
 ```
 
-apply [this patch](https://github.com/cypress-io/cypress/pull/5579/files) to Cypress from within the shell.nix
+apply [this patch](https://github.com/cypress-io/cypress/pull/5579/files) to [Cypress](https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/development/web/cypress/default.nix) from within the shell.nix
 (or get it upstreamed?)
diff --git a/_use nixpkgs cypress binary before npms broken copy.md b/_use nixpkgs cypress binary before npms broken copy.md
@@ -41,5 +41,9 @@ Cypress Version: 6.2.1
 
 # todo
 
+```
+EACCES: permission denied, open '/home/rkb/.config/Cypress/cy/production/browsers/chrome-stable/interactive/CypressExtension/background.js'
+```
+
 apply [this patch](https://github.com/cypress-io/cypress/pull/5579/files) to Cypress from within the shell.nix
 (or get it upstreamed?)
diff --git a/_use nixpkgs cypress binary before npms broken copy.md b/_use nixpkgs cypress binary before npms broken copy.md
@@ -37,4 +37,9 @@ spawn /home/rkb/.cache/Cypress/6.2.1/Cypress/Cypress ENOENT
 
 Platform: linux (NixOS - )
 Cypress Version: 6.2.1
-```
+```
+
+# todo
+
+apply [this patch](https://github.com/cypress-io/cypress/pull/5579/files) to Cypress from within the shell.nix
+(or get it upstreamed?)
diff --git a/README.md → ...cypress binary before npms broken copy.md b/README.md → ...cypress binary before npms broken copy.md
diff --git a/README.md b/README.md
@@ -0,0 +1,40 @@
+Should help with avoiding errors like:
+
+```text
+No version of Cypress is installed in: /home/rkb/.cache/Cypress/6.2.1/Cypress
+
+Please reinstall Cypress by running: cypress install
+
+----------
+
+Cypress executable not found at: /home/rkb/.cache/Cypress/6.2.1/Cypress/Cypress
+
+----------
+
+Platform: linux (NixOS - )
+Cypress Version: 6.2.1
+```
+
+and
+
+```text
+Cypress failed to start.
+
+This is usually caused by a missing library or dependency.
+
+The error below should indicate which dependency is missing.
+
+https://on.cypress.io/required-dependencies
+
+If you are using Docker, we provide containers with all required dependencies installed.
+
+----------
+
+Command failed with ENOENT: /home/rkb/.cache/Cypress/6.2.1/Cypress/Cypress --no-sandbox --smoke-test --ping=459
+spawn /home/rkb/.cache/Cypress/6.2.1/Cypress/Cypress ENOENT
+
+----------
+
+Platform: linux (NixOS - )
+Cypress Version: 6.2.1
+```
diff --git a/shell.nix b/shell.nix
@@ -0,0 +1,17 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+pkgs.mkShell {
+  name = "cypress-example";
+
+  buildInputs = with pkgs; [
+    cypress
+    (with dotnetCorePackages; combinePackages [ sdk_5_0 net_5_0 ])
+    nodejs
+  ];
+
+  shellHook = ''
+    export CYPRESS_INSTALL_BINARY=0
+    export CYPRESS_RUN_BINARY=$(which Cypress)
+  '';
+}
+
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