refactor: migrate src/cli/cmd/session.ts from Bun.file() to statSync (#14144)

Author: thdxr

packages/opencode/src/cli/cmd/session.ts

@@ -5,6 +5,7 @@ import { bootstrap } from "../bootstrap"
 import { UI } from "../ui"
 import { Locale } from "../../util/locale"
 import { Flag } from "../../flag/flag"
+import { Filesystem } from "../../util/filesystem"
 import { EOL } from "os"
 import path from "path"
 
@@ -17,18 +18,18 @@ function pagerCmd(): string[] {
   // user could have less installed via other options
   const lessOnPath = Bun.which("less")
   if (lessOnPath) {
-    if (Bun.file(lessOnPath).size) return [lessOnPath, ...lessOptions]
+    if (Filesystem.stat(lessOnPath)?.size) return [lessOnPath, ...lessOptions]
   }
 
   if (Flag.OPENCODE_GIT_BASH_PATH) {
     const less = path.join(Flag.OPENCODE_GIT_BASH_PATH, "..", "..", "usr", "bin", "less.exe")
-    if (Bun.file(less).size) return [less, ...lessOptions]
+    if (Filesystem.stat(less)?.size) return [less, ...lessOptions]
   }
 
   const git = Bun.which("git")
   if (git) {
     const less = path.join(git, "..", "..", "usr", "bin", "less.exe")
-    if (Bun.file(less).size) return [less, ...lessOptions]
+    if (Filesystem.stat(less)?.size) return [less, ...lessOptions]
   }
 
   // Fall back to Windows built-in more (via cmd.exe)

packages/opencode/src/file/time.ts

@@ -1,6 +1,7 @@
 import { Instance } from "../project/instance"
 import { Log } from "../util/log"
 import { Flag } from "../flag/flag"
+import { Filesystem } from "../util/filesystem"
 
 export namespace FileTime {
   const log = Log.create({ service: "file.time" })
@@ -59,10 +60,10 @@ export namespace FileTime {
 
     const time = get(sessionID, filepath)
     if (!time) throw new Error(`You must read file ${filepath} before overwriting it. Use the Read tool first`)
-    const stats = await Bun.file(filepath).stat()
-    if (stats.mtime.getTime() > time.getTime()) {
+    const mtime = Filesystem.stat(filepath)?.mtime
+    if (mtime && mtime.getTime() > time.getTime()) {
       throw new Error(
-        `File ${filepath} has been modified since it was last read.\nLast modification: ${stats.mtime.toISOString()}\nLast read: ${time.toISOString()}\n\nPlease read the file again before modifying it.`,
+        `File ${filepath} has been modified since it was last read.\nLast modification: ${mtime.toISOString()}\nLast read: ${time.toISOString()}\n\nPlease read the file again before modifying it.`,
       )
     }
   }

packages/opencode/src/util/filesystem.ts

@@ -18,12 +18,13 @@ export namespace Filesystem {
     }
   }
 
+  export function stat(p: string): ReturnType<typeof statSync> | undefined {
+    return statSync(p, { throwIfNoEntry: false }) ?? undefined
+  }
+
   export async function size(p: string): Promise<number> {
-    try {
-      return statSync(p).size
-    } catch {
-      return 0
-    }
+    const s = stat(p)?.size ?? 0
+    return typeof s === "bigint" ? Number(s) : s
   }
 
   export async function readText(p: string): Promise<string> {