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zsh/.oh-my-zsh/plugins/shell-proxy/proxy.py

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+#!/usr/bin/env python3
+import os
+import sys
+from subprocess import check_output, list2cmdline
+
+cwd = os.path.dirname(__file__)
+ssh_agent = os.path.join(cwd, "ssh-agent.py")
+user_proxy = os.environ.get("CONFIG_PROXY", os.path.expandvars("$HOME/.config/proxy"))
+
+
+def get_http_proxy():
+    default_proxy = os.environ.get("DEFAULT_PROXY")
+    if default_proxy:
+        return default_proxy
+    if os.path.isfile(user_proxy):
+        return check_output(user_proxy).decode("utf-8").strip()
+    raise Exception("Not found, Proxy configuration")
+
+
+def make_proxies(url: str):
+    proxies = {"%s_PROXY" % _: url for _ in ("HTTP", "HTTPS", "FTP", "RSYNC", "ALL")}
+    proxies.update({name.lower(): value for (name, value) in proxies.items()})
+    proxies["GIT_SSH"] = ssh_agent
+    return proxies
+
+
+def merge(mapping: dict):
+    return ("%s=%s" % _ for _ in mapping.items())
+
+
+class CommandSet:
+    proxies = make_proxies(get_http_proxy())
+    aliases = {
+        _: "env __SSH_PROGRAM_NAME__=%s %s" % (_, ssh_agent)
+        for _ in ("ssh", "sftp", "scp", "slogin", "ssh-copy-id")
+    }
+
+    def enable(self):
+        cmdline("export", *merge(self.proxies))
+        cmdline("alias", *merge(self.aliases))
+
+    def disable(self):
+        cmdline("unset", *self.proxies.keys())
+        cmdline("unalias", *self.aliases.keys())
+
+    def status(self):
+        proxies = (
+            "%11s = %s" % (name, os.environ[name])
+            for name in self.proxies.keys()
+            if name in os.environ
+        )
+        for _ in proxies:
+            cmdline("echo", _)
+
+    def usage(self):
+        cmdline("echo", "usage: proxy {enable,disable,status}")
+        self.status()
+
+
+def cmdline(*items):
+    print(list2cmdline(items))
+
+
+def main():
+    command = CommandSet()
+    if len(sys.argv) == 1:
+        command.usage()
+        sys.exit(-1)
+    getattr(command, sys.argv[1], command.usage)()
+
+
+if __name__ == "__main__":
+    main()