Function readInstructionFileFromDir

agent/agentcontextconfig/api.go:241–269

readInstructionFileFromDir scans a directory for a file matching fileName (case-insensitive) and reads its contents.

(dir, fileName string)

// readInstructionFileFromDir scans a directory for a file matching
// fileName (case-insensitive) and reads its contents.
func readInstructionFileFromDir(dir, fileName string) (codersdk.ChatMessagePart, bool) {
	dirEntries, err := os.ReadDir(dir)
	if err != nil {
		return codersdk.ChatMessagePart{}, false
	}

	for _, e := range dirEntries {
		if e.IsDir() {
			continue
		}
		if strings.EqualFold(strings.TrimSpace(e.Name()), fileName) {
			filePath := filepath.Join(dir, e.Name())
			content, truncated, ok := readAndSanitizeFile(filePath, maxInstructionFileBytes)
			if !ok {
				return codersdk.ChatMessagePart{}, false
			}
			if content == "" {
				return codersdk.ChatMessagePart{}, false
			}
			return codersdk.ChatMessagePart{
				Type:                 codersdk.ChatMessagePartTypeContextFile,
				ContextFilePath:      filePath,
				ContextFileContent:   content,
				ContextFileTruncated: truncated,
			}, true
		}
	}
	return codersdk.ChatMessagePart{}, false
}

// readAndSanitizeFile reads the file at path, capping the read
// at maxBytes to avoid unbounded memory allocation. It sanitizes