git-interface/git-serve.py

   1 #!/usr/bin/python3
   2
   3 import configparser
   4 import mysql.connector
   5 import os
   6 import re
   7 import shlex
   8 import sys
   9
  10 config = configparser.RawConfigParser()
  11 config.read(os.path.dirname(os.path.realpath(__file__)) + "/../conf/config")
  12
  13 aur_db_host = config.get('database', 'host')
  14 aur_db_name = config.get('database', 'name')
  15 aur_db_user = config.get('database', 'user')
  16 aur_db_pass = config.get('database', 'password')
  17 aur_db_socket = config.get('database', 'socket')
  18
  19 repo_path = config.get('serve', 'repo-path')
  20 repo_regex = config.get('serve', 'repo-regex')
  21 git_shell_cmd = config.get('serve', 'git-shell-cmd')
  22 ssh_cmdline = config.get('serve', 'ssh-cmdline')
  23
  24 enable_maintenance = config.getboolean('options', 'enable-maintenance')
  25 maintenance_exc = config.get('options', 'maintenance-exceptions').split()
  26
  27 def pkgbase_exists(pkgbase):
  28     db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,
  29                                  passwd=aur_db_pass, db=aur_db_name,
  30                                  unix_socket=aur_db_socket)
  31     cur = db.cursor()
  32
  33     cur.execute("SELECT COUNT(*) FROM PackageBases WHERE Name = %s ",
  34                 [pkgbase])
  35
  36     db.close()
  37     return (cur.fetchone()[0] > 0)
  38
  39 def list_repos(user):
  40     db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,
  41                                  passwd=aur_db_pass, db=aur_db_name,
  42                                  unix_socket=aur_db_socket)
  43     cur = db.cursor()
  44
  45     cur.execute("SELECT ID FROM Users WHERE Username = %s ", [user])
  46     userid = cur.fetchone()[0]
  47     if userid == 0:
  48         die('{:s}: unknown user: {:s}'.format(action, user))
  49
  50     cur.execute("SELECT Name, PackagerUID FROM PackageBases " +
  51                 "WHERE MaintainerUID = %s ", [userid])
  52     for row in cur:
  53         print((' ' if row[1] else '*') + row[0])
  54     db.close()
  55
  56 def create_pkgbase(pkgbase, user):
  57     if not re.match(repo_regex, pkgbase):
  58         die('{:s}: invalid repository name: {:s}'.format(action, pkgbase))
  59     if pkgbase_exists(pkgbase):
  60         die('{:s}: package base already exists: {:s}'.format(action, pkgbase))
  61
  62     db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,
  63                                  passwd=aur_db_pass, db=aur_db_name,
  64                                  unix_socket=aur_db_socket)
  65     cur = db.cursor()
  66
  67     cur.execute("SELECT ID FROM Users WHERE Username = %s ", [user])
  68     userid = cur.fetchone()[0]
  69     if userid == 0:
  70         die('{:s}: unknown user: {:s}'.format(action, user))
  71
  72     cur.execute("INSERT INTO PackageBases (Name, SubmittedTS, ModifiedTS, " +
  73                 "SubmitterUID, MaintainerUID) VALUES (%s, UNIX_TIMESTAMP(), " +
  74                 "UNIX_TIMESTAMP(), %s, %s)", [pkgbase, userid, userid])
  75     pkgbase_id = cur.lastrowid
  76
  77     cur.execute("INSERT INTO CommentNotify (PackageBaseID, UserID) " +
  78                 "VALUES (%s, %s)", [pkgbase_id, userid])
  79
  80     db.commit()
  81     db.close()
  82
  83 def check_permissions(pkgbase, user):
  84     db = mysql.connector.connect(host=aur_db_host, user=aur_db_user,
  85                                  passwd=aur_db_pass, db=aur_db_name,
  86                                  unix_socket=aur_db_socket, buffered=True)
  87     cur = db.cursor()
  88
  89     if os.environ.get('AUR_PRIVILEGED', '0') == '1':
  90         return True
  91
  92     cur.execute("SELECT COUNT(*) FROM PackageBases " +
  93                 "LEFT JOIN PackageComaintainers " +
  94                 "ON PackageComaintainers.PackageBaseID = PackageBases.ID " +
  95                 "INNER JOIN Users ON Users.ID = PackageBases.MaintainerUID " +
  96                 "OR PackageBases.MaintainerUID IS NULL " +
  97                 "OR Users.ID = PackageComaintainers.UsersID " +
  98                 "WHERE Name = %s AND Username = %s", [pkgbase, user])
  99     return cur.fetchone()[0] > 0
 100
 101 def die(msg):
 102     sys.stderr.write("{:s}\n".format(msg))
 103     exit(1)
 104
 105 def die_with_help(msg):
 106     die(msg + "\nTry `{:s} help` for a list of commands.".format(ssh_cmdline))
 107
 108 user = os.environ.get("AUR_USER")
 109 cmd = os.environ.get("SSH_ORIGINAL_COMMAND")
 110 if not cmd:
 111     die_with_help("Interactive shell is disabled.")
 112 cmdargv = shlex.split(cmd)
 113 action = cmdargv[0]
 114
 115 if enable_maintenance:
 116     remote_addr = os.environ["SSH_CLIENT"].split(" ")[0]
 117     if not remote_addr in maintenance_exc:
 118         die("The AUR is down due to maintenance. We will be back soon.")
 119
 120 if action == 'git-upload-pack' or action == 'git-receive-pack':
 121     if len(cmdargv) < 2:
 122         die_with_help("{:s}: missing path".format(action))
 123
 124     path = cmdargv[1].rstrip('/')
 125     if not path.startswith('/'):
 126         path = '/' + path
 127     if not path.endswith('.git'):
 128         path = path + '.git'
 129     pkgbase = path[1:-4]
 130     if not re.match(repo_regex, pkgbase):
 131         die('{:s}: invalid repository name: {:s}'.format(action, pkgbase))
 132
 133     if not pkgbase_exists(pkgbase):
 134         create_pkgbase(pkgbase, user)
 135
 136     if action == 'git-receive-pack':
 137         if not check_permissions(pkgbase, user):
 138             die('{:s}: permission denied: {:s}'.format(action, user))
 139
 140     os.environ["AUR_USER"] = user
 141     os.environ["AUR_PKGBASE"] = pkgbase
 142     os.environ["GIT_NAMESPACE"] = pkgbase
 143     cmd = action + " '" + repo_path + "'"
 144     os.execl(git_shell_cmd, git_shell_cmd, '-c', cmd)
 145 elif action == 'list-repos':
 146     if len(cmdargv) > 1:
 147         die_with_help("{:s}: too many arguments".format(action))
 148     list_repos(user)
 149 elif action == 'setup-repo':
 150     if len(cmdargv) < 2:
 151         die_with_help("{:s}: missing repository name".format(action))
 152     if len(cmdargv) > 2:
 153         die_with_help("{:s}: too many arguments".format(action))
 154     create_pkgbase(cmdargv[1], user)
 155 elif action == 'help':
 156     die("Commands:\n" +
 157         "  help                 Show this help message and exit.\n" +
 158         "  list-repos           List all your repositories.\n" +
 159         "  setup-repo <name>    Create an empty repository.\n" +
 160         "  git-receive-pack     Internal command used with Git.\n" +
 161         "  git-upload-pack      Internal command used with Git.")
 162 else:
 163     die_with_help("invalid command: {:s}".format(action))