Function Program

packages/eslint-codegen-model/src/oxlint/rules/codegen.ts:89–137

(program: RuleNode)

    const defaults = (context.options[0] ?? undefined) as CodegenDefaults | undefined
    return {
      Program(program: RuleNode) {
        const source = context.sourceCode.getText()
        const filename = context.physicalFilename
        const resolver = nativeResolverFor(filename)

        // Create a fresh regex instance per Program visit to avoid shared lastIndex state
        const re = new RegExp(blockRe.source, blockRe.flags)
        let match: RegExpExecArray | null

        while ((match = re.exec(source)) !== null) {
          const [fullMatch, indent = "", rawOptions = "", body = "", endIndent = ""] = match
          const matchStart = match.index
          const matchEnd = match.index + fullMatch.length

          let options: BlockOptions
          try {
            options = applyDefaults(parseBlockOptions(rawOptions), defaults)
          } catch {
            continue
          }

          const existingContent = trimTrailingNewline(body)
          let generatedContent: string
          try {
            generatedContent = trimTrailingNewline(
              normaliseGeneratedContent(
                options,
                filename,
                renderPreset(options, { filename, existingContent }, source, resolver)
              )
            )
          } catch {
            continue
          }

          const nextBody = generatedContent.length > 0 ? `${indentBlock(generatedContent, indent)}\n` : ""
          const replacement = `${indent}// codegen:start ${rawOptions}\n${nextBody}${endIndent}// codegen:end`

          if (replacement !== fullMatch) {
            context.report({
              node: program,
              message: `codegen block with preset "${options.preset}" is stale`,
              fix(fixer: RuleFixer) {
                return fixer.replaceTextRange([matchStart, matchEnd], replacement)
              }
            })
          }
        }
      }
    }
  }
}