Dax
28 lines
949 B
TypeScript
28 lines
949 B
TypeScript
import { Effect } from "effect"
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import { FSUtil } from "@opencode-ai/core/fs-util"
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const BOM_CODE = 0xfeff
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const BOM = String.fromCharCode(BOM_CODE)
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export function split(text: string) {
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if (text.charCodeAt(0) !== BOM_CODE) return { bom: false, text }
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return { bom: true, text: text.slice(1) }
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}
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export function join(text: string, bom: boolean) {
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const stripped = split(text).text
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if (!bom) return stripped
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return BOM + stripped
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}
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export const readFile = Effect.fn("Bom.readFile")(function* (fs: FSUtil.Interface, filePath: string) {
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return split(new TextDecoder("utf-8", { ignoreBOM: true }).decode(yield* fs.readFile(filePath)))
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})
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export const syncFile = Effect.fn("Bom.syncFile")(function* (fs: FSUtil.Interface, filePath: string, bom: boolean) {
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const current = yield* readFile(fs, filePath)
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if (current.bom === bom) return current.text
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yield* fs.writeWithDirs(filePath, join(current.text, bom))
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return current.text
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})
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