Files
computer-playbook/roles/dev-python
kevinveenbirkenbachandClaude Opus 4.7 ed04dad5d5 refactor(meta): land req-008/009/010 role-meta layout/networks/ports/run_after migration
Single atomic landing for three back-to-back role-meta refactor requirements
(see docs/requirements/008-role-meta-layout.md, 009-per-role-networks-and-ports.md,
010-role-meta-runafter-lifecycle-migration.md).

req-008 — role meta layout
  * Move every role's metadata under meta/<topic>.yml with file-root
    convention (no wrapping key matching the basename):
      - schema/main.yml + config/main.yml.credentials → meta/schema.yml
      - users/main.yml                                → meta/users.yml
      - config/main.yml.server                        → meta/server.yml
      - config/main.yml.rbac                          → meta/rbac.yml
      - config/main.yml.compose.services + every other top-level key
        of config/main.yml inlined under <entity>.<key>
                                                      → meta/services.yml
      - config/main.yml.compose.volumes               → meta/volumes.yml
  * Drop the legacy schema/, users/, config/ directories from every role.
  * meta/schema.yml: support nested credential keys, optional `default:`
    field (Jinja literal, not rendered/validated/regenerated), implicit
    `algorithm: plain`.
  * Materialised paths drop the `compose.` prefix:
      compose.services.<e>.<…> → services.<e>.<…>
      compose.volumes.<k>      → volumes.<k>
      <former-top-level>.<…>   → services.<entity_name>.<former-top-level>.<…>
  * Update every Python consumer (utils/cache, utils/manager, utils/applications,
    plugins/lookup, plugins/filter, cli/*) plus every Jinja template, vars/*.yml
    and task file to the new paths.
  * No legacy fallback. Repository-wide grep for `compose.services.` /
    `compose.volumes.` / `schema/main.yml` / `users/main.yml` / `config/main.yml`
    is empty outside docs/requirements/ and tasks/utils/migrate_meta_layout.py.
  * Add tests/lint/repository/test_role_meta_layout.py guarding against the
    old paths returning, and an explicit lint guard that meta/variants.yml
    files do not carry a `compose:` wrapper.

req-009 — per-role networks/ports
  * Move group_vars/all/08_networks.yml.defaults_networks.local.<role>.{subnet,
    dns_resolver} into roles/<role>/meta/server.yml.networks.local.{subnet,
    dns_resolver}.
  * Delete group_vars/all/09_ports.yml entirely; ports now live on the
    service entity that exposes them at
    roles/<role>/meta/services.yml.<entity>.ports.{inter,local,public}.
  * Rename + int-cast every former top-level `services.<entity>.port`
    field to `services.<entity>.ports.inter` (single int).
  * Always-category-keyed maps for ports.local / ports.public; relay
    spans use {start, end} integers.
  * Add PORT_BANDS map to group_vars/all/08_networks.yml — single source
    of truth for the per-<scope>.<category> band ranges, consumed by both
    the new CLI helpers and the lint test.
  * New CLI helpers (cli meta ports suggest, cli meta networks suggest)
    walk the live role tree gap-first then increment-fallback, with
    deterministic output and non-zero exit on capacity overflow.
  * cli create role consumes both helpers when scaffolding a new role.
  * Lint extensions: bare-int port shape rejection, host-bound port
    collision check (single ints + relay span integers, inter excluded),
    band-membership check with documented allow-list for the legacy
    web-app-bigbluebutton.bigbluebutton.local.http: 48087 entry.

req-010 — run_after / lifecycle migration
  * Move galaxy_info.run_after and galaxy_info.lifecycle out of
    meta/main.yml into meta/services.yml.<primary_entity>.{run_after,
    lifecycle}; <primary_entity> is the value returned by
    get_entity_name(role_name).
  * For multi-entity roles whose primary entity has no compose service
    (web-app-bluesky → bluesky, web-app-matrix → matrix, desk/dev/drv/
    gen roles), create a dedicated metadata-only top-level entry under
    <primary_entity>.
  * Introduce utils/roles/meta_lookup.py with get_role_run_after /
    get_role_lifecycle that resolve <primary_entity> once and read from
    meta/services.yml; degrade gracefully when meta/services.yml is
    absent OR the field is absent; raise MetaServicesShapeError when the
    file exists but is malformed.
  * Update every consumer (utils/service_registry, utils/invokable,
    cli/meta/applications/resolution/run_after/__main__, cli/meta/roles/
    lifecycle_filter/__main__, cli/meta/applications/resolution/combined,
    cli/build/{tree,graph,role_include}, cli/deploy/development/{common,
    init,deps,deploy}, plugins/filter/canonical_domains_map, etc.) to
    use the helper.
  * Lint guards: no run_after/lifecycle in meta/main.yml; lifecycle
    values restricted to {planned,pre-alpha,alpha,beta,stable,deprecated};
    run_after/lifecycle never on a non-primary entity; empty run_after
    lists rejected.

Also folded into this change set
  * services_disabler now writes `services.<svc>.{enabled,shared}` into
    host_vars instead of the old `compose.services.<svc>.{...}` path; the
    discover/find pair walks meta/services.yml and only treats entries
    carrying enabled/shared/provides as provider declarations (so
    metadata-only entries from req-010 do not create spurious provider
    rows).
  * service_registry skips `run_after` deps whose target was filtered
    out via SERVICES_DISABLED instead of failing the whole load.
  * cli/mirror/resolver and cli/create/inventory/mirror_overrides emit/
    consume the new applications.<role>.services.<svc>.image shape
    (mirror.md updated to match).
  * utils/domains/list.build_applications_from_roles now reads
    meta/server.yml directly (it had been silently returning {} since
    config/main.yml stopped existing).
  * utils/roles/resource_validation.filter_roles_by_min_storage reads
    meta/services.yml.<entity>.min_storage instead of the legacy
    compose.services path.
  * web-app-bluesky pre-clones the social-app build context BEFORE
    sys-svc-compose so the build context is on disk by the time
    sys-stk-front-proxy/tasks/main.yml flushes the docker build handler.
  * 4 meta/variants.yml files (svc-ai-ollama, web-app-phpmyadmin,
    web-app-wordpress, web-app-keycloak) lose their `compose: services:`
    wrapper so deep-merge over meta/services.yml lands on the new
    file-root shape.

Validation
  * Unit tests:        1571 passed.
  * Lint tests:        50 passed.
  * Integration tests: 161 passed (1 skipped).
  * Full-cycle fresh-purged-apps deploy succeeded for the 8-app validation
    set: web-app-{nextcloud,wordpress,yourls,bigbluebutton,bluesky,gitea,
    discourse,mattermost}.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-27 09:58:26 +02:00
..
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Python Development Utilities 🐍

Description

This Ansible role sets up a Python development environment on Arch Linux. It includes Python itself, the pip package manager, and builds on the general developer persona to support scripting, application development, data science, and more.

Learn more at the Python Official Site, the Arch Wiki - Python, and Wikipedia – Python.

Overview

This role provides the essential tooling for Python developers, enabling immediate use of python and pip from the command line. It supports both general-purpose scripting and advanced software engineering workflows.

Purpose

To simplify and standardize the provisioning of Python-ready environments for developers, students, data scientists, and automation engineers.

Features

  • Installs Python and Pip: Ensures the interpreter and package manager are available.
  • Prefers Python 3.11+: Installs Python 3.11+ where available and makes it the default via /usr/local/bin/python3 and /usr/local/bin/pip3.
  • Persona Integration: Extends dev-core with Python-specific tools.
  • Foundation for Further Stacks: Ideal starting point for Flask, Django, scientific computing, and automation.

Supported distro families in the installer script:

  • Arch Linux
  • Debian
  • Ubuntu
  • Fedora
  • CentOS / RHEL

Customization

Easily extend this role with:

  • Python virtualenv tools (python-virtualenv, pyenv)
  • Popular libraries (numpy, requests, flask)
  • Framework-specific roles (e.g., dev-python-django)

Credits 📝

Developed and maintained by Kevin Veen-Birkenbach.
Learn more at www.veen.world

Part of the Infinito.Nexus Project
License: Infinito.Nexus Community License (Non-Commercial)