Preload safe debug shim (#29)

In https://github.com/ferdium/ferdium-app/pull/23 we removed usages of
the debug package due to an electron bug.

This patch aims to restore some debug functionality by introducing a
shim. The shim detect whether if it is being introduced in a preload
script where the electron but would be triggered, and falls back to a
simple replacement for debug. However, in the main and renderer
processes, where a preload script is not being used, we still get full
debug functionality.

In this way, a module can be used both in a preload script and outside
of it, while still preserving debug functionality whenever possible.

Signed-off-by: Kristóf Marussy <kristof@marussy.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/index.html b/src/index.html
index 23fbb6b20..d86e36de9 100644
--- a/src/index.html
+++ b/src/index.html
@@ -28,6 +28,9 @@
       require('./sentry');
       const { isDevMode } = require('./environment-remote');
       if (isDevMode) {
+        // Here we must access `debug` directly (instead of through `preload-safe-debug`),
+        // because we need to set the log level.
+        // However, this is safe, because we aren't in a preload script.
         const debugging = require('debug');
         debugging.enable(process.env.DEBUG);