Function maybeParseApplyPatch

packages/opencode/src/patch/index.ts:244–298

(
  argv: string[],
)

// Apply patch functionality
export function maybeParseApplyPatch(
  argv: string[],
):
  | { type: MaybeApplyPatch.Body; args: ApplyPatchArgs }
  | { type: MaybeApplyPatch.PatchParseError; error: Error }
  | { type: MaybeApplyPatch.NotApplyPatch } {
  const APPLY_PATCH_COMMANDS = ["apply_patch", "applypatch"]

  // Direct invocation: apply_patch <patch>
  if (argv.length === 2 && APPLY_PATCH_COMMANDS.includes(argv[0])) {
    try {
      const { hunks } = parsePatch(argv[1])
      return {
        type: MaybeApplyPatch.Body,
        args: {
          patch: argv[1],
          hunks,
        },
      }
    } catch (error) {
      return {
        type: MaybeApplyPatch.PatchParseError,
        error: error as Error,
      }
    }
  }

  // Bash heredoc form: bash -lc 'apply_patch <<"EOF" ...'
  if (argv.length === 3 && argv[0] === "bash" && argv[1] === "-lc") {
    // Simple extraction - in real implementation would need proper bash parsing
    const script = argv[2]
    const heredocMatch = script.match(/apply_patch\s*<<['"](\w+)['"]\s*\n([\s\S]*?)\n\1/)

    if (heredocMatch) {
      const patchContent = heredocMatch[2]
      try {
        const { hunks } = parsePatch(patchContent)
        return {
          type: MaybeApplyPatch.Body,
          args: {
            patch: patchContent,
            hunks,
          },
        }
      } catch (error) {
        return {
          type: MaybeApplyPatch.PatchParseError,
          error: error as Error,
        }
      }
    }
  }

  return { type: MaybeApplyPatch.NotApplyPatch }
}

// File content manipulation
interface ApplyPatchFileUpdate {