背景
我同时安装了 python2 和 python3 时，python 指向 python2，python3 才是 python3
默认情况下，在 Sublime 内 Ctrl/Cmd + B 运行 python 文件时，调用的是环境变量 PATH 中的 python
所以当我想用 python3 执行文件时，传统方法是先 new 一个 build system 专门运行 python3，每次还都得手动指定。极其繁琐！
需求
我希望 Sublime 可以根据 py 文件开头第一行注释 #!/usr/bin/env python3 来确定是执行 python2 还是 python3
解决方案
需要一个脚本，在 Sublime 调进 build system 时调用这个脚本
写一个新的 Python.sublime-build 文件，在这个文件中调用前面的脚本
用自己写的 Python.sublime-build 覆盖默认的 Python.sublime-build
具体步骤
- 找到 Python.sublime-package 文件，Mac 系统下在
/Applications/Sublime\ Text.app/Contents/MacOS/Packages/Python.sublime-package - 把它复制一份到
~/Library/Application\ Support/Sublime\ Text\ 3/Packages/User/下面，并把后缀改成 .zip - 解压得到一个 Python 目录，进到这个目录，找到
Python.sublime-build文件，装盘备用，一会下锅。 - 新建一个文件随便给个名字，保存在
~/Library/Application\ Support/Sublime\ Text\ 3/Packages/User/下面，文件内容如下：
import sublime
import sublime_plugin
import subprocess
import threading
import os
class MyPyBuildCommand(sublime_plugin.WindowCommand):
encoding = 'utf-8'
killed = False
proc = None
panel = None
panel_lock = threading.Lock()
def is_enabled(self, kill=False):
# The Cancel build option should only be available
# when the process is still running
if kill:
return self.proc is not None and self.proc.poll() is None
return True
def detect_version(self):
fname = self.window.active_view ().file_name()
with open(fname, 'r', encoding='utf-8') as f:
line = f.readline()
m = re.search(r'(python[0-9\.]*)', line)
if m and line.startswith("#"):
return m.group(1)
return "python"
def run(self, kill=False):
if kill:
if self.proc is not None and self.proc.poll() is None:
self.killed = True
self.proc.terminate()
self.proc = None
return
vars = self.window.extract_variables()
working_dir = vars['file_path']
# A lock is used to ensure only one thread is
# touching the output panel at a time
with self.panel_lock:
# Creating the panel implicitly clears any previous contents
self.panel = self.window.create_output_panel('exec')
# Enable result navigation. The result_file_regex does
# the primary matching, but result_line_regex is used
# when build output includes some entries that only
# contain line/column info beneath a previous line
# listing the file info. The result_base_dir sets the
# path to resolve relative file names against.
settings = self.panel.settings()
settings.set(
'result_file_regex',
r'^File "([^"]+)" line (\d+) col (\d+)'
)
settings.set(
'result_line_regex',
r'^\s+line (\d+) col (\d+)'
)
settings.set('result_base_dir', working_dir)
self.window.run_command('show_panel', {'panel': 'output.exec'})
if self.proc is not None and self.proc.poll() is None:
self.proc.terminate()
self.proc = None
args = [ self.detect_version() ]
# sublime.message_dialog(vars['file_name'])
args.append(vars['file_name'])
env = os.environ.copy()
env["PYTHONUNBUFFERED"] = "1" # 及时 print
self.proc = subprocess.Popen(
args,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT,
cwd=working_dir,
env=env,
)
self.killed = False
threading.Thread(
target=self.read_handle,
args=(self.proc.stdout,)
).start()
def read_handle(self, handle):
# for line in iter(handle.readline, b''):
# self.queue_write(line.decode(self.encoding))
# handle.close()
# return
chunk_size = 2 ** 13
out = b''
while True:
try:
data = os.read(handle.fileno(), chunk_size)
# If exactly the requested number of bytes was
# read, there may be more data, and the current
# data may contain part of a multibyte char
out += data
if len(data) == chunk_size:
continue
if data == b'' and out == b'':
raise IOError('EOF')
# We pass out to a function to ensure the
# timeout gets the value of out right now,
# rather than a future (mutated) version
self.queue_write(out.decode(self.encoding))
if data == b'':
raise IOError('EOF')
out = b''
except (UnicodeDecodeError) as e:
msg = 'Error decoding output using %s - %s'
self.queue_write(msg % (self.encoding, str(e)))
break
except (IOError):
if self.killed:
msg = 'Cancelled'
else:
msg = 'Finished'
self.queue_write('\n[%s]' % msg)
break
def queue_write(self, text):
sublime.set_timeout(lambda: self.do_write(text), 1)
def do_write(self, text):
with self.panel_lock:
self.panel.run_command('append', {'characters': text})
- 修改第 3 步的那个 Python.sublime-build 文件：
{
"target": "my_py_build",
"selector": "source.python",
"cancel": {"kill": true}
}
随便测试一下
anddone！
有问题请留言
参考链接：