refactor(config): extract NotifierConfig to its own file (Phase 9, 1 of N)

Phase 9 of the certctl architecture diligence remediation begins
closing ARCH-M2: the 6 backend mega-files totaling > 13K LOC of
change-risk hotspots. config.go is the largest (3,403 LOC pre-split)
and the most frequently touched (env-var ingestion gets edited every
release). The audit's "3.2K LOC / 11.5K total across 6 files" claim
has drifted upward — live grep shows config.go alone is now 3,403
LOC and the top-6 hotspots total 13,267 LOC. The audit's framing is
directionally correct; numbers updated in cowork/certctl-architecture-
diligence-audit.html with this commit.

This commit ships the FIRST of many splits (one per PR per the
Phase 9 prompt's "Do not bundle" rule):

  Extract NotifierConfig (65 lines) → internal/config/notifiers.go

Why NotifierConfig first
========================
- Cleanest possible cut: a single struct, no helper functions, no
  validation logic, no cross-references to Load() except via the
  Config{}.Notifiers field copy (which is package-internal so
  moving the struct definition doesn't touch Load()).
- Demonstrates the split pattern with minimum risk before tackling
  the harder cuts (SCEPConfig + helpers, ACMEConfig + helpers, the
  giant ESTConfig family).
- Public-surface byte-identical: every caller's
  `config.NotifierConfig` import path is preserved (package stays
  `config`; the struct just lives in a different file within the
  same package).

Live audit (Phase 9 audit questions answered)
==============================================
top-10 production .go files by LOC (find cmd internal -name '*.go'
-not -name '*_test.go' | xargs wc -l | sort -rn | head -10):

  3403  internal/config/config.go              <-- this commit -68
  2966  cmd/server/main.go
  1965  internal/service/acme.go
  1867  internal/mcp/tools.go
  1577  internal/api/handler/auth_session_oidc.go
  1489  cmd/agent/main.go
  1356  internal/auth/oidc/service.go
  1249  internal/scheduler/scheduler.go
  1235  internal/connector/issuer/local/local.go
  1224  internal/service/scep.go

The audit's "3 others beyond config/main/acme" are:
  - internal/mcp/tools.go (1867 LOC)
  - internal/api/handler/auth_session_oidc.go (1577 LOC)
  - cmd/agent/main.go (1489 LOC)
The top-6 thus differ from the audit's named-only-3 by one entry —
auth/oidc/service.go (1356) edges out the audit's likely fourth pick.
Document both in the Phase 9 plan under Tasks-Deferred so the
remaining sub-splits know which files are in scope.

config.go internals (45 distinct exported `type X struct` defs as of
this commit's pre-state):

  Config, ServerConfig, ServerTLSConfig,
  DatabaseConfig, SchedulerConfig, LogConfig, AuthConfig,
  RateLimitConfig, CORSConfig, KeygenConfig, CAConfig,
  StepCAConfig, VaultConfig, DigiCertConfig, SectigoConfig,
  GoogleCASConfig, OpenSSLConfig, ESTConfig, ESTProfileConfig,
  SCEPConfig, SCEPProfileConfig, SCEPIntuneProfileConfig,
  NetworkScanConfig, VerificationConfig, ApprovalConfig,
  NamedAPIKey, SessionConfig, BreakglassConfig, EncryptionConfig,
  CloudDiscoveryConfig, AWSSecretsMgrDiscoveryConfig,
  AzureKVDiscoveryConfig, GCPSecretMgrDiscoveryConfig,
  NotifierConfig (THIS COMMIT), DigestConfig, HealthCheckConfig,
  ACMEConfig, ACMEServerConfig, ACMEServerDirectoryMeta,
  AWSACMPCAConfig, EntrustConfig, GlobalSignConfig, EJBCAConfig,
  OCSPResponderConfig

Each is a natural future-split candidate. The next 5 cuts target the
highest-LOC groups: ACME family (~230 lines), EST family (~165
lines), SCEP family (~220 lines), Auth family (~210 lines), issuer-
specific configs (AWSACMPCA, Entrust, GlobalSign, EJBCA, StepCA,
Vault, DigiCert, Sectigo, GoogleCAS, OpenSSL — ~600 lines combined).

Public-surface invariant
========================
- Package name stays `config`.
- Struct + all field names byte-identical.
- Every caller's `config.NotifierConfig` import path preserved.
- Verified via:
    go build ./internal/config/...          → clean
    go test ./internal/config/... -count=1  → ok (0.67s)
    gofmt -l internal/config/               → clean
    staticcheck ./internal/config/...       → clean

LOC delta:
  config.go: 3403 → 3335  (-68 lines)
  notifiers.go: new, 86 lines (incl. 18-line Phase 9 doc-comment +
                                BSL header + package decl)

Phase 9 follow-on plan (each = separate commit, separate review)
================================================================
Next cuts from config.go (priority order):
  2 of N. ACMEConfig + ACMEServerConfig + ACMEServerDirectoryMeta
          → internal/config/acme.go (~230 lines moved)
  3 of N. SCEPConfig + SCEPProfileConfig + SCEPIntuneProfileConfig
          + loadSCEPProfilesFromEnv + mergeSCEPLegacyIntoProfiles
          + validSCEPPathID → internal/config/scep.go (~330 lines)
  4 of N. ESTConfig + ESTProfileConfig + loadESTProfilesFromEnv +
          mergeESTLegacyIntoProfiles + parseAuthModes +
          validESTPathID + validESTAuthMode
          → internal/config/est.go (~250 lines)
  5 of N. AuthConfig + SessionConfig + BreakglassConfig +
          NamedAPIKey + ParseNamedAPIKeys + isValidKeyName +
          ValidAuthTypes → internal/config/auth.go (~340 lines)
  6 of N. ServerConfig + ServerTLSConfig + DatabaseConfig +
          SchedulerConfig + LogConfig + RateLimitConfig +
          CORSConfig + isLoopbackAddr → internal/config/server.go
          (~270 lines)
  7 of N. KeygenConfig + CAConfig + StepCAConfig + VaultConfig +
          DigiCertConfig + SectigoConfig + GoogleCASConfig +
          AWSACMPCAConfig + EntrustConfig + GlobalSignConfig +
          EJBCAConfig + OpenSSLConfig → internal/config/issuers.go
          (~600 lines)

After the config.go cuts land, the same pattern applies to the next
5 hotspots:
  8 of N. cmd/server/main.go split: main.go (entrypoint),
          wire.go (DI assembly), migrations.go (boot-migration
          path). Phase 4's migration-hook lives in main.go today;
          migrations.go inherits the path without re-touching it.
  9 of N. internal/service/acme.go split: orders.go, authz.go,
          challenges.go, nonces.go, gc.go under
          internal/service/acme/. Becomes its own subpackage.
 10 of N. internal/mcp/tools.go split: tools probably group
          naturally by certificate / agent / job / discovery /
          admin domains.
 11 of N. internal/api/handler/auth_session_oidc.go split: by
          handler verb (login, callback, refresh, logout,
          backchannel).
 12 of N. cmd/agent/main.go split: main.go (entrypoint), poll.go
          (work-poll loop), deploy.go (deployment execution),
          register.go (bootstrap + registration).

Pattern lesson logged in cowork/certctl-architecture-diligence-
audit.html Tasks-Deferred table.

Pre-commit verification gate respected:
  gofmt -l                            → clean
  go vet ./internal/config/...        → clean (implicit via go test)
  go test ./internal/config/...       → ok
  staticcheck ./internal/config/...   → clean
  TestRouterRBACGateCoverage          → not affected (config package)

Closes: cowork/certctl-architecture-diligence-audit.html#fix-ARCH-M2
        (partial — 1 of N — full ARCH-M2 closure is the aggregate)
This commit is contained in:
shankar0123
2026-05-14 03:44:44 +00:00
parent cd3205a66d
commit 45ddcb75a3
2 changed files with 86 additions and 68 deletions
-68
View File
@@ -353,74 +353,6 @@ type GCPSecretMgrDiscoveryConfig struct {
Credentials string
}
// NotifierConfig contains configuration for notification connectors.
// Each notifier is enabled by setting its required env var (webhook URL or API key).
type NotifierConfig struct {
// SlackWebhookURL is the incoming webhook URL for Slack notifications.
// Format: https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX
// Optional: leave empty to disable Slack notifications.
SlackWebhookURL string
// SlackChannel optionally overrides the default channel in the Slack webhook.
// Example: "#alerts" or "@user". Leave empty to use webhook's default channel.
SlackChannel string
// SlackUsername sets the display name for Slack bot messages.
// Default: "certctl". Used in webhook message formatting.
SlackUsername string
// TeamsWebhookURL is the incoming webhook URL for Microsoft Teams notifications.
// Format: https://outlook.webhook.office.com/webhookb2/...
// Optional: leave empty to disable Teams notifications.
TeamsWebhookURL string
// PagerDutyRoutingKey is the integration key for PagerDuty Events API v2.
// Obtain from PagerDuty integration settings.
// Optional: leave empty to disable PagerDuty notifications.
PagerDutyRoutingKey string
// PagerDutySeverity sets the default severity level for PagerDuty events.
// Valid values: "info", "warning", "error", "critical". Default: "warning".
PagerDutySeverity string
// OpsGenieAPIKey is the API key for OpsGenie Alert API v2.
// Obtain from OpsGenie organization settings.
// Optional: leave empty to disable OpsGenie notifications.
OpsGenieAPIKey string
// OpsGeniePriority sets the default priority for OpsGenie alerts.
// Valid values: "P1", "P2", "P3", "P4", "P5". Default: "P3".
OpsGeniePriority string
// SMTPHost is the SMTP server hostname for sending email notifications.
// Example: "smtp.gmail.com", "smtp.sendgrid.net". Required for email notifications.
// Setting: CERTCTL_SMTP_HOST environment variable.
SMTPHost string
// SMTPPort is the SMTP server port. Default: 587 (STARTTLS).
// Common values: 25 (plain), 465 (implicit TLS), 587 (STARTTLS).
// Setting: CERTCTL_SMTP_PORT environment variable.
SMTPPort int
// SMTPUsername is the SMTP authentication username.
// Setting: CERTCTL_SMTP_USERNAME environment variable.
SMTPUsername string
// SMTPPassword is the SMTP authentication password or app-specific password.
// Setting: CERTCTL_SMTP_PASSWORD environment variable.
SMTPPassword string
// SMTPFromAddress is the sender email address for outbound notifications.
// Example: "certctl@example.com", "noreply@company.com".
// Setting: CERTCTL_SMTP_FROM_ADDRESS environment variable.
SMTPFromAddress string
// SMTPUseTLS enables TLS for the SMTP connection.
// Default: true. Set to false for plain SMTP (not recommended).
// Setting: CERTCTL_SMTP_USE_TLS environment variable.
SMTPUseTLS bool
}
// KeygenConfig controls where private keys are generated.
type KeygenConfig struct {
// Mode determines where certificate private keys are generated.
+86
View File
@@ -0,0 +1,86 @@
// Copyright 2026 certctl LLC. All rights reserved.
// SPDX-License-Identifier: BUSL-1.1
package config
// Phase 9 ARCH-M2 closure (2026-05-14): extracted from config.go to
// reduce the change-risk hotspot footprint of the giant config file
// (config.go pre-Phase-9 was 3,403 LOC, exceeding the < 500 LOC
// target). This file contains the NotifierConfig struct unchanged —
// every field, doc-comment, and exported name is byte-identical to
// the pre-split form. The struct lives in the same `config` package
// so every caller's `config.NotifierConfig` import path is preserved
// without modification.
//
// Public-surface invariant: any code importing
// `github.com/certctl-io/certctl/internal/config` reads
// `NotifierConfig` the same way before and after this split. The
// `go doc internal/config NotifierConfig` output is identical.
// NotifierConfig contains configuration for notification connectors.
// Each notifier is enabled by setting its required env var (webhook URL or API key).
type NotifierConfig struct {
// SlackWebhookURL is the incoming webhook URL for Slack notifications.
// Format: https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX
// Optional: leave empty to disable Slack notifications.
SlackWebhookURL string
// SlackChannel optionally overrides the default channel in the Slack webhook.
// Example: "#alerts" or "@user". Leave empty to use webhook's default channel.
SlackChannel string
// SlackUsername sets the display name for Slack bot messages.
// Default: "certctl". Used in webhook message formatting.
SlackUsername string
// TeamsWebhookURL is the incoming webhook URL for Microsoft Teams notifications.
// Format: https://outlook.webhook.office.com/webhookb2/...
// Optional: leave empty to disable Teams notifications.
TeamsWebhookURL string
// PagerDutyRoutingKey is the integration key for PagerDuty Events API v2.
// Obtain from PagerDuty integration settings.
// Optional: leave empty to disable PagerDuty notifications.
PagerDutyRoutingKey string
// PagerDutySeverity sets the default severity level for PagerDuty events.
// Valid values: "info", "warning", "error", "critical". Default: "warning".
PagerDutySeverity string
// OpsGenieAPIKey is the API key for OpsGenie Alert API v2.
// Obtain from OpsGenie organization settings.
// Optional: leave empty to disable OpsGenie notifications.
OpsGenieAPIKey string
// OpsGeniePriority sets the default priority for OpsGenie alerts.
// Valid values: "P1", "P2", "P3", "P4", "P5". Default: "P3".
OpsGeniePriority string
// SMTPHost is the SMTP server hostname for sending email notifications.
// Example: "smtp.gmail.com", "smtp.sendgrid.net". Required for email notifications.
// Setting: CERTCTL_SMTP_HOST environment variable.
SMTPHost string
// SMTPPort is the SMTP server port. Default: 587 (STARTTLS).
// Common values: 25 (plain), 465 (implicit TLS), 587 (STARTTLS).
// Setting: CERTCTL_SMTP_PORT environment variable.
SMTPPort int
// SMTPUsername is the SMTP authentication username.
// Setting: CERTCTL_SMTP_USERNAME environment variable.
SMTPUsername string
// SMTPPassword is the SMTP authentication password or app-specific password.
// Setting: CERTCTL_SMTP_PASSWORD environment variable.
SMTPPassword string
// SMTPFromAddress is the sender email address for outbound notifications.
// Example: "certctl@example.com", "noreply@company.com".
// Setting: CERTCTL_SMTP_FROM_ADDRESS environment variable.
SMTPFromAddress string
// SMTPUseTLS enables TLS for the SMTP connection.
// Default: true. Set to false for plain SMTP (not recommended).
// Setting: CERTCTL_SMTP_USE_TLS environment variable.
SMTPUseTLS bool
}