mirror of
https://gitlab.com/TECHNOFAB/nix-gitlab-ci.git
synced 2025-12-12 10:10:06 +01:00
94 lines
3.5 KiB
YAML
94 lines
3.5 KiB
YAML
spec:
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inputs:
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cache_strategy:
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type: string
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description: |
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(empty for auto) | none | runner | cachix | attic
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Sets the default strategy and will be overridden by $NIX_CI_CACHE_STRATEGY
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default: "none"
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cache_files:
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type: array
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description: |
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Files to use as the cache key for the generated pipeline yaml.
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If you use "ci.nix" to define CI, add that here for example
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default: ["flake.nix", "flake.lock"]
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---
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stages:
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- build
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- trigger
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variables:
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# which version of the image should be used
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_NIX_CI_VERSION: ${NIX_CI_VERSION}
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_NIX_CI_IMAGE: registry.gitlab.com/technofab/nix-gitlab-ci/nix-ci:${_NIX_CI_VERSION}
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# force build the pipeline yaml
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_NIX_CI_FORCE_BUILD: ${NIX_CI_FORCE_BUILD}
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# disable caching on the child pipeline jobs
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_NIX_CI_DISABLE_CACHE: ${NIX_CI_DISABLE_CACHE}
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# type of cache strategy to use (none, runner, attic, cachix)
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_NIX_CI_CACHE_STRATEGY: $[[ inputs.cache_strategy ]]
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# for multiple pipelines
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_NIX_CI_PIPELINE_NAME: ${CI_PIPELINE_SOURCE}
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# set NIX_CI_DEFAULT_SOURCES to something like "/^web/" or "/^web|push/",
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# then this will default to the "default" pipeline for these sources.
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# By default we map everything to "default" (man that's quite a bunch of defaults)
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_NIX_CI_DEFAULT_SOURCES: "/.*/"
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.env_overrides: &env_overrides
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rules:
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- if: $NIX_CI_IMAGE != null
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variables:
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_NIX_CI_IMAGE: $NIX_CI_IMAGE
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- if: $NIX_CI_CACHE_STRATEGY != null
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variables:
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_NIX_CI_CACHE_STRATEGY: $NIX_CI_CACHE_STRATEGY
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- if: $NIX_CI_DEFAULT_SOURCES != null
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variables:
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_NIX_CI_DEFAULT_SOURCES: $NIX_CI_DEFAULT_SOURCES
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- if: '$CI_PIPELINE_SOURCE =~ $_NIX_CI_DEFAULT_SOURCES'
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variables:
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_NIX_CI_PIPELINE_NAME: default
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- if: $NIX_CI_PIPELINE_NAME != null
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variables:
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_NIX_CI_PIPELINE_NAME: $NIX_CI_PIPELINE_NAME
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- when: on_success
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nix-ci:build:
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<<: *env_overrides
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stage: build
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image: $_NIX_CI_IMAGE
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cache:
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- key:
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files: $[[ inputs.cache_files ]]
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prefix: $_NIX_CI_PIPELINE_NAME
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paths:
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- generated-gitlab-ci.yml
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- key: nix
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paths:
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- .nix-cache/
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before_script:
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# generated-gitlab-ci.yml exists in the cache
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- '[ -f "generated-gitlab-ci.yml" ] && export CACHED=true && echo "A cached pipeline file exists (skip cache with NIX_CI_FORCE_BUILD)" || true'
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# allow the user to manually skip the cache (when the key files are not correctly configured etc.)
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- '[ -n "$_NIX_CI_FORCE_BUILD" ] && unset CACHED && echo "Caching skipped for this job (through NIX_CI_FORCE_BUILD)" || true'
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# only setup when we need to generate the pipeline yaml
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- 'if [ -z "$CACHED" ]; then source setup_nix_ci; fi'
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script:
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# build the generated-gitlab-ci.yml if it does not exist in the cache
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- 'if [ -z "$CACHED" ]; then nix build .#gitlab-ci:pipeline:${_NIX_CI_PIPELINE_NAME} && install result generated-gitlab-ci.yml; fi'
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after_script:
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# save to binary cache or Gitlab CI cache only if we actually built something
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# check if /tmp/nix-store-before exists as $CACHED never exists here and the file only exists if "setup_nix_ci" is called
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- 'if [ -f "/tmp/nix-store-before" ]; then finalize_nix_ci; fi'
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artifacts:
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paths:
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- generated-gitlab-ci.yml
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nix-ci:trigger:
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<<: *env_overrides
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stage: trigger
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needs:
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- nix-ci:build
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trigger:
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include:
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- artifact: generated-gitlab-ci.yml
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job: nix-ci:build
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strategy: depend
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forward:
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pipeline_variables: true
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