From 4b0e0f5adccfce88547f28ead631d2788f1885b3 Mon Sep 17 00:00:00 2001
From: Thomas Adamcik <thomas@adamcik.no>
Date: Mon, 31 Aug 2026 22:32:05 +0200
Subject: [PATCH] opencode: use production channel

OpenCode only recognizes `dev`, `beta`, `prod`, and `latest` as channel
values. Unknown values fall back to `dev`, while `latest` maps to
`prod`. The selected channel controls channel-gated behavior, e.g.
workspaces, is exposed as a `dev` marker in `opencode web`, and affects
the database path.

Nixpkgs currently sets `OPENCODE_CHANNEL = "stable"`, so the package
unintentionally uses development-channel behavior. It also causes
OpenCode to use the nixpkgs-specific `opencode-stable.db` database path.

Change the channel to `prod`, which uses the upstream production
behavior and canonical `opencode.db` path.

To avoid making existing sessions appear lost after upgrading, switch
from `makeBinaryWrapper` to `makeWrapper` and add a temporary wrapper
workaround. When `opencode-stable.db` exists and `opencode.db` does not,
the wrapper continues using the legacy database and points the user at
migration instructions. Explicit `OPENCODE_DB` configuration takes
precedence, and the workaround can be disabled with
`NIXPKGS_OPENCODE_DISABLE_LEGACY_DB_WORKAROUND=1`.

The wrapper does not rename or modify the database.

Relevant upstream code:

- https://github.com/anomalyco/opencode/blob/v1.18.25/packages/app/vite.js#L8-L13
- https://github.com/anomalyco/opencode/blob/v1.18.25/packages/core/src/database/database.ts
---
 pkgs/by-name/op/opencode/package.nix | 40 +++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 4 deletions(-)

diff --git a/pkgs/by-name/op/opencode/package.nix b/pkgs/by-name/op/opencode/package.nix
index 9798bb86d5a4..5c22b285ff18 100644
--- a/pkgs/by-name/op/opencode/package.nix
+++ b/pkgs/by-name/op/opencode/package.nix
@@ -4,7 +4,7 @@
   bun,
   darwin,
   fetchFromGitHub,
-  makeBinaryWrapper,
+  makeWrapper,
   models-dev,
   nodejs,
   nix-update-script,
@@ -116,7 +116,7 @@ stdenv.mkDerivation (finalAttrs: {
     bun
     nodejs
     installShellFiles
-    makeBinaryWrapper
+    makeWrapper
     writableTmpDirAsHomeHook
   ]
   ++ lib.optionals stdenv.hostPlatform.isDarwin [
@@ -136,7 +136,7 @@ stdenv.mkDerivation (finalAttrs: {
   env.MODELS_DEV_API_JSON = "${models-dev}/dist/_api.json";
   env.OPENCODE_DISABLE_MODELS_FETCH = true;
   env.OPENCODE_VERSION = finalAttrs.version;
-  env.OPENCODE_CHANNEL = "stable";
+  env.OPENCODE_CHANNEL = "prod";
 
   buildPhase = ''
     runHook preBuild
@@ -166,7 +166,39 @@ stdenv.mkDerivation (finalAttrs: {
          ]
        )
      } \
-    --set OPENCODE_DISABLE_AUTOUPDATE true
+    --set OPENCODE_DISABLE_AUTOUPDATE true \
+    --run '
+      # NOTE: Once this workaround is removed we should switch back to using
+      # makeBinaryWrapper here.
+
+      # nixpkgs previously built OpenCode with OPENCODE_CHANNEL=stable. "stable"
+      # is no longer an upstream channel, so it caused OpenCode to store its database
+      # as opencode-stable.db. After switching to the upstream production channel,
+      # OpenCode would normally use opencode.db instead, making existing sessions
+      # appear to be lost. Keep using the legacy database until the user migrates
+      # it, unless they explicitly configured OPENCODE_DB or disabled this workaround.
+
+      data_home="''${XDG_DATA_HOME:-$HOME/.local/share}"
+      legacy="$data_home/opencode/opencode-stable.db"
+      canonical="$data_home/opencode/opencode.db"
+
+      if [ -z "''${OPENCODE_DB:-}" ] \
+        && [ -z "''${NIXPKGS_OPENCODE_DISABLE_LEGACY_DB_WORKAROUND:-}" ] \
+        && [ -e "$legacy" ] \
+        && [ ! -e "$canonical" ]; then
+        export OPENCODE_DB="opencode-stable.db"
+
+        # Only show migration guidance when stderr is attached to a terminal.
+        # Non-interactive uses such as `opencode web`, services, or scripts
+        # should continue starting normally with the legacy database selected.
+        if [ -t 2 ]; then
+          echo "Detected legacy nixpkgs OpenCode database at $legacy." >&2
+          echo "Continuing to use it for compatibility." >&2
+          echo "See https://github.com/NixOS/nixpkgs/pull/558549 for migration instructions." >&2
+          echo "Set NIXPKGS_OPENCODE_DISABLE_LEGACY_DB_WORKAROUND=1 to disable this workaround." >&2
+        fi
+      fi
+    '
 
     install -Dm644 ${models-dev.jsonschema} $out/share/model-schema.json
     install -Dm644 config.json $out/share/config.json