feat: add OPENCODE_DATA_DIR environment variable

Allow overriding the default data directory location

Author: arc-source-coder

packages/opencode/src/flag/flag.ts

@@ -13,6 +13,7 @@ export namespace Flag {
   export const OPENCODE_FAKE_VCS = process.env["OPENCODE_FAKE_VCS"]
   export const OPENCODE_EXPERIMENTAL_BASH_MAX_OUTPUT_LENGTH =
     process.env["OPENCODE_EXPERIMENTAL_BASH_MAX_OUTPUT_LENGTH"]
+  export const OPENCODE_DATA_DIR = process.env["OPENCODE_DATA_DIR"]
 
   // Experimental
   export const OPENCODE_EXPERIMENTAL = truthy("OPENCODE_EXPERIMENTAL")

packages/opencode/src/global/index.ts

@@ -2,10 +2,11 @@ import fs from "fs/promises"
 import { xdgData, xdgCache, xdgConfig, xdgState } from "xdg-basedir"
 import path from "path"
 import os from "os"
+import { Flag } from "../flag/flag"
 
 const app = "opencode"
 
-const data = path.join(xdgData!, app)
+const data = Flag.OPENCODE_DATA_DIR || path.join(xdgData!, app)
 const cache = path.join(xdgCache!, app)
 const config = path.join(xdgConfig!, app)
 const state = path.join(xdgState!, app)