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Diffstat (limited to 'python/vyos/component_version.py')
| -rw-r--r-- | python/vyos/component_version.py | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/python/vyos/component_version.py b/python/vyos/component_version.py new file mode 100644 index 000000000..b1554828d --- /dev/null +++ b/python/vyos/component_version.py @@ -0,0 +1,174 @@ +# Copyright 2022 VyOS maintainers and contributors <maintainers@vyos.io> +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2.1 of the License, or (at your option) any later version. +# +# This library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library. If not, see <http://www.gnu.org/licenses/>. + +""" +Functions for reading/writing component versions. + +The config file version string has the following form: + +VyOS 1.3/1.4: + +// Warning: Do not remove the following line. +// vyos-config-version: "broadcast-relay@1:cluster@1:config-management@1:conntrack@3:conntrack-sync@2:dhcp-relay@2:dhcp-server@6:dhcpv6-server@1:dns-forwarding@3:firewall@5:https@2:interfaces@22:ipoe-server@1:ipsec@5:isis@1:l2tp@3:lldp@1:mdns@1:nat@5:ntp@1:pppoe-server@5:pptp@2:qos@1:quagga@8:rpki@1:salt@1:snmp@2:ssh@2:sstp@3:system@21:vrrp@2:vyos-accel-ppp@2:wanloadbalance@3:webproxy@2:zone-policy@1" +// Release version: 1.3.0 + +VyOS 1.2: + +/* Warning: Do not remove the following line. */ +/* === vyatta-config-version: "broadcast-relay@1:cluster@1:config-management@1:conntrack-sync@1:conntrack@1:dhcp-relay@2:dhcp-server@5:dns-forwarding@1:firewall@5:ipsec@5:l2tp@1:mdns@1:nat@4:ntp@1:pppoe-server@2:pptp@1:qos@1:quagga@7:snmp@1:ssh@1:system@10:vrrp@2:wanloadbalance@3:webgui@1:webproxy@2:zone-policy@1" === */ +/* Release version: 1.2.8 */ + +""" + +import os +import re +import sys +import fileinput +from vyos.xml import component_version +from vyos.version import get_version + +def from_string(string_line, vintage='vyos'): + """ + Get component version dictionary from string. + Return empty dictionary if string contains no config information + or raise error if component version string malformed. + """ + version_dict = {} + + if vintage == 'vyos': + if re.match(r'// vyos-config-version:.+', string_line): + if not re.match(r'// vyos-config-version:\s+"([\w,-]+@\d+:)+([\w,-]+@\d+)"\s*', string_line): + raise ValueError(f"malformed configuration string: {string_line}") + + for pair in re.findall(r'([\w,-]+)@(\d+)', string_line): + version_dict[pair[0]] = int(pair[1]) + + elif vintage == 'vyatta': + if re.match(r'/\* === vyatta-config-version:.+=== \*/$', string_line): + if not re.match(r'/\* === vyatta-config-version:\s+"([\w,-]+@\d+:)+([\w,-]+@\d+)"\s+=== \*/$', string_line): + raise ValueError(f"malformed configuration string: {string_line}") + + for pair in re.findall(r'([\w,-]+)@(\d+)', string_line): + version_dict[pair[0]] = int(pair[1]) + else: + raise ValueError("Unknown config string vintage") + + return version_dict + +def from_file(config_file_name='/opt/vyatta/etc/config/config.boot', + vintage='vyos'): + """ + Get component version dictionary parsing config file line by line + """ + f = open(config_file_name, 'r') + for line_in_config in f: + version_dict = from_string(line_in_config, vintage=vintage) + if version_dict: + return version_dict + + # no version information + return {} + +def from_system(): + """ + Get system component version dict. + """ + return component_version() + +def legacy_from_system(): + """ + legacy function; imported as-is. + + Get component versions from running system; critical failure if + unable to read migration directory. + """ + import vyos.defaults + + system_versions = {} + + try: + version_info = os.listdir(vyos.defaults.directories['current']) + except OSError as err: + print("OS error: {}".format(err)) + sys.exit(1) + + for info in version_info: + if re.match(r'[\w,-]+@\d+', info): + pair = info.split('@') + system_versions[pair[0]] = int(pair[1]) + + return system_versions + +def format_string(ver: dict) -> str: + """ + Version dict to string. + """ + keys = list(ver) + keys.sort() + l = [] + for k in keys: + v = ver[k] + l.append(f'{k}@{v}') + sep = ':' + return sep.join(l) + +def system_footer(vintage='vyos') -> str: + """ + Version footer as string. + """ + ver_str = format_string(from_system()) + release = get_version() + if vintage == 'vyos': + ret_str = (f'// Warning: Do not remove the following line.\n' + + f'// vyos-config-version: "{ver_str}"\n' + + f'// Release version: {release}\n') + elif vintage == 'vyatta': + ret_str = (f'/* Warning: Do not remove the following line. */\n' + + f'/* === vyatta-config-version: "{ver_str}" === */\n' + + f'/* Release version: {release} */\n') + else: + raise ValueError("Unknown config string vintage") + + return ret_str + +def write_footer(file_name, vintage='vyos'): + """ + Write version footer to file. + """ + footer = system_footer(vintage=vintage) + if file_name: + with open(file_name, 'a') as f: + f.write(footer) + else: + sys.stdout.write(footer) + +def remove_footer(file_name): + """ + Remove old version footer. + """ + for line in fileinput.input(file_name, inplace=True): + if re.match(r'/\* Warning:.+ \*/$', line): + continue + if re.match(r'/\* === vyatta-config-version:.+=== \*/$', line): + continue + if re.match(r'/\* Release version:.+ \*/$', line): + continue + if re.match('// vyos-config-version:.+', line): + continue + if re.match('// Warning:.+', line): + continue + if re.match('// Release version:.+', line): + continue + sys.stdout.write(line) |