action/notify-email

Composite Gitea Action that sends a fritzlab-themed email from a CI workflow. Renders an HTML body (with plain-text fallback) styled to match the websites/fritzlab.net/theme.css palette, and relays via mail.fritzlab.net:25 under the trusted-CIDR rule (no SMTP auth — see k8s-manager skill mail.md).

Gating is the caller's responsibility (typically if: failure()). The action always sends when invoked.

Usage

Minimal failure notification:

- name: notify on failure
  if: failure()
  uses: https://code.fritzlab.net/action/notify-email@v1
  with:
    status: failure
    summary: "agent deploy failed"

With richer context:

- name: notify on failure
  if: failure()
  uses: https://code.fritzlab.net/action/notify-email@v1
  with:
    status: failure
    subject: "agent deploy failed: ${{ github.sha }}"
    summary: "Deploy of ${{ github.sha }} to bob@${{ vars.DEPLOY_HOST }} failed"
    details: |
      Target host: ${{ vars.DEPLOY_HOST }}
      Branch: ${{ github.ref_name }}
    from: agent-ci@fritzlab.net

Success notification (e.g. confirm a base-image rebuild cascaded):

- if: success()
  uses: https://code.fritzlab.net/action/notify-email@v1
  with:
    status: success
    summary: "base #${{ github.run_number }} cascaded to runner"

Inputs

Name	Required	Default	Description
summary	yes	—	One-line headline rendered at the top of the email body.
status	no	info	failure / success / info — drives accent colour + subject prefix.
subject	no	summary	Mail subject after the status prefix.
details	no	—	Multiline preformatted block, rendered in a monospace card.
to	no	noc@fritzlab.net	Recipient address.
from	no	ci@fritzlab.net	Sender address. Must be permitted by the relay.
smtp-host	no	mail.fritzlab.net	SMTP relay host.
smtp-port	no	25	SMTP port.

Auto-injected fields

The action reads the following from ${{ github.* }} and includes them in both HTML and text bodies — callers do not need to pass these:

• Repository (linked to Gitea repo page)
• Branch (ref_name)
• Commit (short SHA linked to commit page)
• Workflow / job
• Run number (+ attempt if > 1)
• Trigger (event_name by actor)
• "view run" button linking to the Actions run

Status styling

Status	Subject prefix	Accent
failure	[FAILED]	red (#fca5a5)
success	[OK]	green (#86efac)
info	[INFO]	violet (#7c5cff) — fritzlab default accent

Headers added

• X-Fritzlab-Status: failure | success | info
• X-Fritzlab-Source: action/notify-email
• X-Fritzlab-Repo: <owner>/<repo>

These can be used as Sieve filters in Stalwart to route or tag CI mail.

Why HTML in a CI email

Email clients strip <style> blocks and @import and cannot fetch web fonts, so the fritzlab palette is inlined per-element. Dark-only — fritzlab brand has no light variant. The plain-text alternative covers terminal mail readers and spam-filter previews.