让Termux对浏览器更友好

Download xb.py

难点：

• 获取jupyter等应用的实时输出

import subprocess
backup = subprocess.Popen(
    cmd.split(), shell=False, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
for line in iter(backup.stdout.readline, b''):
    line = line.rstrip().decode('utf8')

• 使Ctrl+C能使让应用结束
  • 只有以shell=False启动的Popen才能收到中止信号，不要问我为什么。

try:
    do_something()
except KeyboardInterrupt:
    from os import _exit

    print('Quiting')
    backup.kill()
    _exit(0)

• 能自动识别使用什么应用

# 基于文件数量多少的分类

def guess_app():
    from os import listdir, getcwd, chdir
    from os.path import splitext

    app_trait = {'.ipynb': 'j',
                 '.md': 'd'}
    # Support launch mkdocs even deep inside the directory
    chdir(getcwd().split('docs')[0])
    if 'mkdocs.yml' in listdir():
        return 'k'
    exts = {}
    # Convert to only extentions
    all_file = list(map(lambda x: splitext(x)[1], listdir()))
    for k in app_trait:
        exts[k] = all_file.count(k)
    # Get the most frequent one
    most = sorted([(k, v)for k, v in exts.items()],
                  key=lambda x: x[1], reverse=True)[0][0]
    return app_trait[most]

# 参考了grip语法后，也许更合适的分类

def guess_app():
    from os import listdir, getcwd, chdir
    from os.path import splitext

    app_trait = {'.ipynb': 'j',
                 '.md': 'd'}
    # Support launch mkdocs even deep inside the directory
    if 'mkdocs.yml' in listdir():
        return 'k'
    pwd = getcwd()
    if 'docs' in pwd:
        chdir(pwd.split('docs')[0])
        if 'mkdocs.yml' in listdir():
            return 'k'
        chdir(pwd)
    if len(argv) > 1 and argv[1].endswith('.md') or 'README.md' in listdir():
        return 'd'
    exts = {}
    # Convert to only extentions
    all_file = set(map(lambda x: splitext(x)[1], listdir()))
    if '.ipynb' in all_file:
        return 'j'
    raise NotImplementedError('No application found to implement this.')

• 有时候应用不止一次地输出应打开的地址，这时要立一个flag

def start_app(cmd):
    XB_STATUS = False
    ......
    r = findall('http://.*/', line) or findall('http://.*$', line)
    if len(r) > 0 and not XB_STATUS:
        print(r[0])
        popen('termux-open-url "%s"' % r[0])
        XB_STATUS = True