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https://code.tvl.fyi/depot.git:/tools/nixery.git
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72fac25c97
Introduces three new types representing each of the possible package sources and moves the logic for specifying the package source to the server. Concrete changes: * Determining whether a specified git reference is a commit vs. a branch/tag is now done in the server, and is done more precisely by using a regular expression. * Package sources now have a new `CacheKey` function which can be used to retrieve a key under which a build manifest can be cached *if* the package source is not a moving target (i.e. a full git commit hash of either nixpkgs or a private repository). This function is not yet used. * Users *must* now specify a package source, Nixery no longer defaults to anything and will fail to launch if no source is configured.
46 lines
1.7 KiB
Nix
46 lines
1.7 KiB
Nix
# Copyright 2019 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Load a Nix package set from one of the supported source types
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# (nixpkgs, git, path).
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{ srcType, srcArgs, importArgs ? { } }:
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with builtins;
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let
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# If a nixpkgs channel is requested, it is retrieved from Github (as
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# a tarball) and imported.
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fetchImportChannel = channel:
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let
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url =
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"https://github.com/NixOS/nixpkgs-channels/archive/${channel}.tar.gz";
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in import (fetchTarball url) importArgs;
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# If a git repository is requested, it is retrieved via
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# builtins.fetchGit which defaults to the git configuration of the
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# outside environment. This means that user-configured SSH
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# credentials etc. are going to work as expected.
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fetchImportGit = spec: import (fetchGit spec) importArgs;
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# No special handling is used for paths, so users are expected to pass one
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# that will work natively with Nix.
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importPath = path: import (toPath path) importArgs;
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in if srcType == "nixpkgs" then
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fetchImportChannel srcArgs
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else if srcType == "git" then
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fetchImportGit (fromJSON srcArgs)
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else if srcType == "path" then
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importPath srcArgs
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else
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throw ("Invalid package set source specification: ${srcType} (${srcArgs})")
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