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| 1 | +# SPDX-FileCopyrightText: 2022 Melissa LeBlanc-Williams for Adafruit Industries |
| 2 | +# |
| 3 | +# SPDX-License-Identifier: MIT |
| 4 | + |
| 5 | +import os |
| 6 | +import storage |
| 7 | +import microcontroller |
| 8 | + |
| 9 | +# Get all files in the format of .env.xxxxxxxxxx |
| 10 | +def enumerate_env_files(): |
| 11 | + found_files = [] |
| 12 | + all_files = os.listdir("/") |
| 13 | + for current_file in all_files: |
| 14 | + if current_file[:4] == ".env" and len(current_file) > 4: |
| 15 | + found_files.append(current_file) |
| 16 | + return found_files |
| 17 | + |
| 18 | + |
| 19 | +# Compare .env to enumerated env files |
| 20 | +def get_current_env_file(enumerated_files): |
| 21 | + with open(".env") as env: |
| 22 | + env_lines = env.readlines() |
| 23 | + for env_file in enumerated_files: |
| 24 | + with open(env_file) as f: |
| 25 | + lines = f.readlines() |
| 26 | + if len(env_lines) != len(lines): |
| 27 | + continue |
| 28 | + file_may_match = True |
| 29 | + for line_no, env_line in enumerate(env_lines): |
| 30 | + if env_line != lines[line_no]: |
| 31 | + file_may_match = False |
| 32 | + break |
| 33 | + if not file_may_match: |
| 34 | + continue |
| 35 | + return env_file |
| 36 | + return None |
| 37 | + |
| 38 | + |
| 39 | +# Erase .env then write the contents of the new env file |
| 40 | +def change_env_file(env_file): |
| 41 | + try: |
| 42 | + storage.remount("/", False) |
| 43 | + open(".env", "w").close() |
| 44 | + with open(".env", "w") as env, open(env_file) as f: |
| 45 | + for line in f.readlines(): |
| 46 | + env.write(line) |
| 47 | + env.close() |
| 48 | + print("Done. Hard resetting board...") |
| 49 | + microcontroller.reset() |
| 50 | + except RuntimeError: |
| 51 | + print("You can't change the env file with this script while USB is mounted") |
| 52 | + |
| 53 | + |
| 54 | +# Return a prettier name than the env file |
| 55 | +def pretty_name(env_file): |
| 56 | + name = env_file[5:] |
| 57 | + name = name[0].upper() + name[1:] |
| 58 | + return f"{name} .env file" |
| 59 | + |
| 60 | +env_files = enumerate_env_files() |
| 61 | + |
| 62 | +if len(env_files) < 2: |
| 63 | + print("You need to have at least 2 env files to change") |
| 64 | + |
| 65 | +result = get_current_env_file(env_files) |
| 66 | +if result: |
| 67 | + env_files.remove(result) |
| 68 | +print("WARNING: This will overwrite all of your current .env file settings.") |
| 69 | +if len(env_files) == 1: |
| 70 | + answer = input(f"Change to {pretty_name(env_files[0])}? ") |
| 71 | + answer = answer.lower() |
| 72 | + if answer in ("y", "yes"): |
| 73 | + change_env_file(env_files[0]) |
| 74 | +else: |
| 75 | + valid_selection = False |
| 76 | + while not valid_selection: |
| 77 | + print("Select an option:") |
| 78 | + for index, file in enumerate(env_files): |
| 79 | + print(f"{index + 1}: {pretty_name(file)}") |
| 80 | + answer = input("Which option would you like? ") |
| 81 | + if answer.isdigit() and 0 < int(answer) <= len(env_files): |
| 82 | + valid_selection = True |
| 83 | + change_env_file(env_files[int(answer) - 1]) |
| 84 | + print(f"{answer} was an invalid selection.\n") |
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