aefcfdd0ae
* gnu/packages/patches/elm-offline-package-registry.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/elm.scm (elm): Use it. * guix/build-system/elm.scm, guix/build/elm-build-system.scm, tests/elm.scm: New files. * Makefile.scm (MODULES, SCM_TESTS): Add them. * doc/guix.texi (Build Systems): Document 'elm-build-system'. * doc/contributing.texi (Elm Packages): New section. Document naming conventions and utilities. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
71 lines
2.5 KiB
Diff
71 lines
2.5 KiB
Diff
From 06563409e6f2b1cca7bc1b27e31efd07a7569da8 Mon Sep 17 00:00:00 2001
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From: Philip McGrath <philip@philipmcgrath.com>
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Date: Thu, 14 Apr 2022 22:41:04 -0400
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Subject: [PATCH] minimal support for offline builds
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Normally, Elm performs HTTP requests before building to obtain or
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update its list of all registed packages and their versions.
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This is problematic in the Guix build environment.
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This patch causes Elm to check if the `GUIX_ELM_OFFLINE_REGISTRY_FILE`
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is set and, if so, to use the contents of the file it specifies as
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though it were the response from
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https://package.elm-lang.org/all-packages.
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This patch does not attempt to add more general support for offline
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builds. In particular, it does not attempt to support incremental
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updates to the package registry cache file. See also discussion at
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https://discourse.elm-lang.org/t/private-package-tool-spec/6779/25.
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---
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builder/src/Deps/Registry.hs | 25 +++++++++++++++++++++----
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1 file changed, 21 insertions(+), 4 deletions(-)
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diff --git a/builder/src/Deps/Registry.hs b/builder/src/Deps/Registry.hs
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index 8d7def98..70cf3622 100644
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--- a/builder/src/Deps/Registry.hs
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+++ b/builder/src/Deps/Registry.hs
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@@ -18,6 +18,8 @@ import Control.Monad (liftM2)
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import Data.Binary (Binary, get, put)
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import qualified Data.List as List
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import qualified Data.Map.Strict as Map
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+import System.Environment as Env
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+import qualified Data.ByteString as BS
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import qualified Deps.Website as Website
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import qualified Elm.Package as Pkg
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@@ -190,13 +192,28 @@ getVersions' name (Registry _ versions) =
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post :: Http.Manager -> String -> D.Decoder x a -> (a -> IO b) -> IO (Either Exit.RegistryProblem b)
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post manager path decoder callback =
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let
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- url = Website.route path []
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- in
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- Http.post manager url [] Exit.RP_Http $
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- \body ->
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+ mkBodyCallback url body =
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case D.fromByteString decoder body of
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Right a -> Right <$> callback a
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Left _ -> return $ Left $ Exit.RP_Data url body
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+ postOnline url cb =
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+ Http.post manager url [] Exit.RP_Http cb
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+ performPost f url =
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+ f url (mkBodyCallback url)
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+ in
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+ do
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+ maybeFile <- Env.lookupEnv "GUIX_ELM_OFFLINE_REGISTRY_FILE"
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+ case (path, maybeFile) of
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+ ( "/all-packages", Just file ) ->
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+ performPost postOffline file
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+ ( _, _ ) ->
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+ -- don't know how to handle other endpoints yet
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+ performPost postOnline (Website.route path [])
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+
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+postOffline :: String -> (BS.ByteString -> IO a) -> IO a
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+postOffline file callback = do
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+ body <- BS.readFile file
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+ callback body
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--
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2.32.0
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