[Nexthop][fboss2-dev] fboss2 bgp policy community-list community subcommand - #1486

Removed comments about the destructor definition in ConfigSession.h.

…thInterface call

main renamed findFirstEthInterface() to getRandomInterfacePortName()
(virtual-management-port fix); convert the branch-added no-op-commit test
to the new helper. Drop the three includes ConfigSession.cpp no longer
uses directly (misc-include-cleaner runs as errors in CI).

- Extract the value parsers (parseBool/parseInt/parseNonNegInt32, handler
  Result) into a shared BgpCliValueParsers.h so sibling BGP dispatchers can
  reuse them, and add a bounded parseAsn4Byte: local-asn/confed-asn accepted
  any uint64 and silently persisted out-of-range ASNs (>= 2^32 wrap the i64
  field negative).
- positionals_at_end() on the global command: CLI11's parent-chain subcommand
  fallthrough steals value tokens that match a sibling command name (e.g. a
  policy named "peer-group") and misparses the command.
- Integration test base: probe the bgpd unit, and pass
  -c safe.directory=/etc/coop on the raw git invocations (gitHead /
  bgpTrackedAtRevision), mirroring the CLI's Git class -- /etc/coop is owned
  by another user (e.g. coop) on provisioned devices, which git otherwise
  rejects as dubious ownership and the helpers silently return empty results.

The commit-path global-attribute tests asserted on the promoted
/etc/coop/bgpcpp/bgpcpp.conf, which only proves what the CLI wrote to disk.
Route ConfigBgpTestBase::setAndCommit() through a new
readRunningBgpConfigViaRpc() -- TBgpService::getRunningConfig against the local
bgpd -- so every positive ConfigBgpGlobalTest asserts its attribute in the
daemon's own view of its config, proving bgpd parsed and adopted the promoted
file after the commit-triggered restart.

The helper retries briefly on connection errors: systemd reports bgpd active as
soon as the process starts, but its thrift server binds the port a few seconds
later, so an RPC issued right after a restart races that window.

Test Plan:
- bazel build //fboss/cli/fboss2/test/integration_test:fboss2_integration_test
- fboss2_integration_test on a DUT with bgpd active: ConfigBgpGlobalTest 7/7
  pass (each attribute set+commit verified in bgpd's getRunningConfig view,
  plus the invalid-bool and negative-graceful-restart-time reject paths).

…ands

Collapses the 18 per-attribute `config protocol bgp peer-group` command
classes (built on the deprecated `folly::dynamic` BgpConfigSession) into a
single typed dispatcher, mirroring CmdConfigProtocolBgpNeighbor. Also adds
`delete protocol bgp peer-group <name>`.

The group name is the first positional token; the next one or two tokens
name the attribute, matched longest-prefix-first so `timers hold-time` wins
over any `timers` prefix; the rest are its value(s). Handlers mutate the
typed bgp::thrift::PeerGroup through ConfigSession::getBgpConfig() /
saveBgpConfig(), so adding a tunable is a one-entry change in the dispatch
table rather than a new command class. 36 command files are deleted.

- Covers the 29 dispatch keys that map to a PeerGroup thrift field: remote-asn /
  local-asn (4-byte-bounded), description, peer-tag, ingress-policy /
  egress-policy, rr-client, confed-peer, redistribute-peer,
  enhanced-route-refresh, connect-mode, add-path send|receive, afi
  disable-ipv4-afi|disable-ipv6-afi|ipv4-over-ipv6-nh, graceful-restart
  restart-time|stateful-ha, max-route pre-filter|post-filter (plus the
  warning-threshold / warning-only knobs), timers
  hold-time|keepalive|out-delay|withdraw-unprog-delay, and next-hop-self.
- Rejected rather than persisted as dead config (precedent: cluster-id in
  the global command, connect-mode BOTH in the neighbor command):
  connect-mode BOTH, since thrift only models is_passive. add-path
  send|receive merges into the AddPath enum bitmask, and clearing the last
  direction unsets the field.
- Attributes with no per-peer-group thrift field (afi
  ipv4-labeled-unicast, afi ipv6-labeled-unicast, peer-port) are absent
  from the dispatch table, so they are refused at parse time as unknown
  attributes; a rejected value never lands on disk.
- positionals_at_end() stops parent-chain subcommand fallthrough from
  reclassifying an attribute token that matches a sibling command name
  once the group name has been consumed (same fix as the neighbor
  command).

- unit tests (16): CmdConfigBgpPeerGroupTest (12) covering arg validation,
  longest-prefix match, the add-path merge matrix, connect-mode, the
  bool/string/route-limit attributes, value validation and unknown-attribute
  rejection, plus CmdDeleteBgpPeerGroupTest (4).
- integration tests (3): ConfigBgpPeerGroupTest asserts the committed
  peer_groups through bgpd's getRunningConfig RPC, proving the daemon
  parsed and adopted the promoted config rather than only checking the
  file the CLI wrote.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Splits the `entry` level of `config protocol bgp policy as-path-list` into
its own CLI11 subcommand. The previous commit ships the list level; this one
ships everything keyed by `entry <seq-num>`:

  as-path-list <name> entry <seq-num>
    -> AsPathList.as_path_list[], keyed by sequence_number
  as-path-list <name> entry <seq-num> asn-regexp <regex>
    -> AsPathListEntry.as_path.as_path.asn_regexp
  as-path-list <name> entry <seq-num> description <string>
    -> AsPathListEntry.description
  as-path-list <name> entry <seq-num> match-logic <EQUAL|NOT_EQUAL>
    -> AsPathListEntry.match_logic_type

- `entry` is a real CLI11 subcommand rather than tokens parsed inside the
  parent's arg type: the list name arrives through the ancestor-args tuple,
  and lookup/create is shared with the parent through
  BgpAsPathListCliUtils.h. Adding an entry attribute is a one-line registry
  change, same as at the list level.
- A list attribute typed alongside `entry` is rejected rather than silently
  dropped, because only the leaf command runs.
- asn-regexp sets the AsPathType union's inline AsPath arm. The pattern may
  contain spaces, since AS-path regexes separate ASNs with spaces
  (e.g. `^65000 65001$`), so it takes the joined-string value shape rather
  than requiring a single token.
- A rejected value leaves nothing staged: a list or entry implicitly created
  for the failed command is rolled back.

- unit tests (10): CmdConfigBgpPolicyAsPathListEntryTest covering arg
  validation, bare entry create, attribute round-trips, seq-num keying,
  asn-regexp accepting spaces, the match-logic default, and the rejection
  paths.
- integration tests (2): ConfigBgpPolicyAsPathListEntryTest stages and
  commits each attribute, then reads it back out of bgpd's running config
  via the getRunningConfig RPC. Enums come back over SimpleJSON as
  integers, so match_logic_type is asserted as MatchValueLogicOperator's
  numeric value rather than its name.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…y-list

Adds `config protocol bgp policy community-list <name> [community <name>]
[<attribute> <value> ...]` and `delete protocol bgp policy community-list
<name>` — the second BGP policy object-type command family, beneath the
`policy` grouping node alongside as-path-list.

- community-list dispatcher with a two-level key (list name + inline
  community member name) writing bgp_policy.BgpPolicies.community_lists[]
  through the typed ConfigSession; boolean-operator maps to
  routing_policy.BooleanOperator, exact-match to the optional bool, and
  the member attributes (description/type/value) set the CommunityRefType
  union's inline Community arm, keyed by Community.name.
- new boolAttr factory in the shared BgpCliAttrHandlers.h (generalizing
  the neighbor dispatcher's), reused by upcoming prefix-list.
- fix a latent dangling-string_view in the shared enumAttr factory: the
  lambda captured a string_view over the caller's fmt::format temporary,
  so every invalid-enum-value rejection printed garbage after
  "expected". valueDesc is now taken (and captured) by value; the
  as-path-list and community-list rejection tests pin the full message.
- unit tests (19) + commit-path integration tests mirroring
  ConfigBgpPolicyAsPathListTest (not yet run on a DUT).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…mand

Splits the `community` (inline member) level of `config protocol bgp policy
community-list` into its own CLI11 subcommand, mirroring
`as-path-list <name> entry <seq-num>`. The previous commit ships the list
level and the whole delete command; this one ships the member level of the
config command:

  community-list <name> community <name>
    -> members[] inline Community, keyed by name
  community-list <name> community <name> value <string>
    -> Community.value
  community-list <name> community <name> type <NORMAL|EXTENDED|LARGE>
    -> Community.type
  community-list <name> community <name> description <string>
    -> Community.description

- The member is selected through the CommunityRefType union's inline arm.
  The list name arrives through the ancestor-args tuple, and lookup/create
  is shared with the parent through BgpCommunityListCliUtils.h.
- A list attribute typed alongside `community` is rejected rather than
  silently dropped, because only the leaf command runs.
- `delete ... community-list <name> community <name>` already ships in the
  previous commit and is untouched here: delete is a single dispatcher that
  handles both levels through parseListMemberSelector(), so it did not need
  splitting.
- A rejected value leaves nothing staged: a list or member implicitly
  created for the failed command is rolled back.

- unit tests (9): CmdConfigBgpPolicyCommunityListCommunityTest covering arg
  validation, bare member create, the three member attributes, named
  members staying distinct, and the rejection paths.
- integration tests (2): ConfigBgpPolicyCommunityListCommunityTest stages
  and commits, then verifies through bgpd's getRunningConfig RPC, including
  that the list and a sibling member survive a single-member delete.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>