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from __future__ import print_function  
import os  
import sys  
import subprocess  
import boto3  
  
from botocore.client import Config  
  
from dulwich.errors import (  
    SendPackError,  
    UpdateRefsError,  
    )  
from dulwich.objectspec import (  
    parse_object,  
    parse_reftuples,  
    )  
from contextlib import closing  
from dulwich import porcelain  
from dulwich.contrib.paramiko_vendor import ParamikoSSHVendor  
  
import dulwich  
import dulwich.repo  
import paramiko  
import paramiko.client  
  
s3 =boto3.client('s3', config=Config(signature_version='s3v4'))  
  
class KeyParamikoSSHVendor(object):  
  
    def __init__(self):  
        self.ssh_kwargs = {'key_filename': '/tmp/id_rsa'}  
  
    def run_command(self, host, command, username=None, port=None,  
                    progress_stderr=None):  
        if not isinstance(command, bytes):  
            raise TypeError(command)  
        if port is None:  
            port = 22  
  
        client = paramiko.SSHClient()  
  
        policy = paramiko.client.MissingHostKeyPolicy()  
        client.set_missing_host_key_policy(policy)  
        client.set_missing_host_key_policy(paramiko.AutoAddPolicy())  
        client.connect(host, username=username, port=port,  
                       **self.ssh_kwargs)  
  
        # Open SSH session  
        channel = client.get_transport().open_session()  
  
        # Run commands  
        channel.exec_command(command)  
  
        from dulwich.contrib.paramiko_vendor import (  
                    _ParamikoWrapper as ParamikoWrapper)  
        return ParamikoWrapper(  
            client, channel, progress_stderr=progress_stderr)  
  
def push(repo, remote_location, refspecs=None,  
         outstream=sys.stdout, errstream=sys.stderr):
    with dulwich.porcelain.open_repo_closing(repo) as r:  
        client, path = dulwich.client.get_transport_and_path(remote_location)  
  
        selected_refs = []  
  
        def update_refs(refs):  
            selected_refs.extend(parse_reftuples(r.refs, refs, refspecs))  
            for (lh, rh, force) in selected_refs:  
                if lh is None:  
                    del refs[rh]  
                else:  
                    refs[rh] = r.refs[lh]  
            return refs  
  
        remote_location_bytes = remote_location.encode('UTF-8')  
        try:  
            client.send_pack(path, update_refs,  
                r.object_store.generate_pack_contents, progress=errstream.write)  
            errstream.write(b"Push to " + remote_location_bytes +  
                            b" successful.\n")  
        except (UpdateRefsError, SendPackError) as e:  
            errstream.write(b"Push to " + remote_location_bytes +  
                            b" failed -> " + e.message.encode('UTF-8') +  
                            b"\n")  
  
def lambda_handler(event, context):
    print(sys.stderr)
    print(getattr(sys.stderr, 'encoding', 'utf-8'))
    s3.download_file('cs-test-data', 'temp-id_rsa', '/tmp/id_rsa')
    cmd = "chmod 600 /tmp/id_rsa"
    output = subprocess.check_output(cmd.split(" "))
    print(output)
  
    dulwich.client.get_ssh_vendor = KeyParamikoSSHVendor
    github_repo = 'git@github.com:ijin/pygit.git'
    new_branch = 'deploy_now'
  
    repo = dulwich.porcelain.clone(github_repo, '/tmp/temp')
    dulwich.porcelain.branch_create(repo, new_branch)
    dulwich.porcelain.symbolic_ref(repo, new_branch)
  
    customer_file = 'customer.txt'
    customer_file_path = '/tmp/temp/' + customer_file
    with open(customer_file_path, 'a') as f:
        f.write('A')
    dulwich.porcelain.add(repo, customer_file)
  
    author = 'lambda <lambda@example.com>'
    commit = dulwich.porcelain.commit(repo.path, message='customer: A', author=author, committer=author)
    #dulwich.porcelain.push(repo, github_repo, ('refs/heads/' + new_branch))
    push(repo, github_repo, ('refs/heads/' + new_branch))

    cmd = "rm -rf /tmp/temp"
    output = subprocess.check_output(cmd.split(" "))
    print(output)
    return commit