Add template support for generated unit files #2

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sgcommand · 2026-04-03T13:57:12Z

sgcommand commented

2026-04-03 13:57:12 +00:00

Allow users to provide their own .service file template to override the built-in one.

Use cases

Add custom [Unit] dependencies (Requires=, After=docker.service, etc.)
Set environment variables (Environment=, EnvironmentFile=)
Change restart policy, timeouts, resource limits
Add ExecStartPre / ExecStartPost hooks

Proposed config

template: /etc/unitdore/unit.service.tmpl  # optional path to custom template

Template uses Go text/template with the same templateData struct already in systemd/generator.go. Built-in template is used as fallback if no custom template is set.

Per-unit override

Also consider allowing per-unit template overrides:

units:
  - name: nginx
    template: /etc/unitdore/templates/nginx.service.tmpl

Allow users to provide their own `.service` file template to override the built-in one. ## Use cases - Add custom `[Unit]` dependencies (`Requires=`, `After=docker.service`, etc.) - Set environment variables (`Environment=`, `EnvironmentFile=`) - Change restart policy, timeouts, resource limits - Add `ExecStartPre` / `ExecStartPost` hooks ## Proposed config ```yaml template: /etc/unitdore/unit.service.tmpl # optional path to custom template ``` Template uses Go `text/template` with the same `templateData` struct already in `systemd/generator.go`. Built-in template is used as fallback if no custom template is set. ## Per-unit override Also consider allowing per-unit template overrides: ```yaml units: - name: nginx template: /etc/unitdore/templates/nginx.service.tmpl ```

warkanum commented

2026-04-03 14:00:58 +00:00

With this feature we must have the ability to get all the variables we can use. maybe a list-variables command that lists the [variable name] and what it does and is for.

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Reference: wdevs/unitdore#2