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New injections for forked elm packages #65

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43f9b29
New injections for forked elm packages
lydell Aug 10, 2025
99c307e
Remove lamdera/containers injection
lydell Aug 10, 2025
329e5aa
Add Browser.Navigation.Key support for serialization and migration li…
lydell Aug 10, 2025
2434d1c
Make Browser.Navigation.Key work
lydell Aug 10, 2025
a41a5e6
Make the <pre> go away in `lamdera live`
lydell Aug 23, 2025
da2f7ad
As far as I understand, the code is correct, remove @TODO
lydell Aug 23, 2025
a0e1a5a
Merge branch 'lamdera-next' into lydell-upgrade-native
lydell Nov 17, 2025
147a7c0
First step towards switcheroo
lydell Dec 20, 2025
aee782d
We have to use ~/.elm/0.19.2/ for IDE support
lydell Dec 20, 2025
d634ef8
Wire in maps of package replacements
lydell Dec 20, 2025
2fd94a7
Add package replacement submodules
lydell Dec 20, 2025
6b1b76a
Add TODO comments
lydell Dec 20, 2025
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16 changes: 16 additions & 0 deletions .gitmodules
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Expand Up @@ -4,3 +4,19 @@
[submodule "vendor/elm-format"]
path = vendor/elm-format
url = git@github.com:lamdera/elm-format.git
[submodule "extra/package-replacements/elm/virtual-dom"]
path = extra/package-replacements/elm/virtual-dom
url = git@github.com:lydell/virtual-dom.git
branch = hot-reload-stop
[submodule "extra/package-replacements/elm/browser"]
path = extra/package-replacements/elm/browser
url = git@github.com:lydell/browser.git
branch = lamdera
[submodule "extra/package-replacements/elm/html"]
path = extra/package-replacements/elm/html
url = git@github.com:lydell/html.git
branch = safe
[submodule "extra/package-replacements/elm/core"]
path = extra/package-replacements/elm/core
url = git@github.com:lydell/core.git
branch = lamdera
Comment on lines +7 to +22
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@lydell lydell Dec 20, 2025

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I’ve pointed these to my repos while developing, but before merging I think it makes sense to have forks in github.com/lamdera/

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@supermario supermario Dec 20, 2025

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I’m not super concerned to fork, but was there a practical reason for it? Like are you worried we might end up needing a Lamdera specific variant, or just a cheap hedge to make now just in case?

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@pithub pithub Dec 21, 2025

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Maybe Simon doesn't want Lamdera to become dependent on his GitHub repositories? If so, maybe we could use Git subtrees instead of submodules. Then Simon's code would be copied into the Lamdera codebase, committed to the Lamdera repo. I used subtrees in some of my projects and found them to work well.

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@lydell lydell Dec 21, 2025

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Yeah, I feel slightly uneasy about Lamdera becoming dependent on my repos.

It’s not super “bad”, since the built binaries don’t depend on it, just the lamdera/compiler repo. And even there we are locked to specific commits of my repos, so if I accidentally change or remove a branch it won’t really break anything.

Anyhow, git subtrees might be better. I don’t know. I haven’t used them before. I might try that out after I’ve got the rest of the Haskell code in place.

8 changes: 6 additions & 2 deletions builder/src/Elm/Details.hs
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Expand Up @@ -63,6 +63,8 @@ import qualified Stuff
import qualified Lamdera
import Lamdera ((&))
import qualified Lamdera.Extensions
import qualified Lamdera.PackageReplacements
import qualified Lamdera.Version

-- DETAILS

Expand Down Expand Up @@ -405,7 +407,7 @@ verifyDep (Env key _ _ cache manager _ _) depsMVar solution pkg details@(Solver.
then
do Reporting.report key Reporting.DCached
maybeCache <- File.readBinary (Stuff.package cache pkg vsn </> "artifacts.dat")
& Lamdera.alternativeImplementation (File.readBinary (Stuff.package cache pkg vsn </> "artifacts.x.dat"))
& Lamdera.alternativeImplementation (File.readBinary (Stuff.package cache pkg vsn </> Lamdera.Version.artifacts))
case maybeCache of
Nothing ->
build key cache depsMVar pkg details fingerprint Set.empty
Expand Down Expand Up @@ -500,7 +502,7 @@ build key cache depsMVar pkg (Solver.Details vsn _) f fs =
Just results ->
let
path = Stuff.package cache pkg vsn </> "artifacts.dat"
& Lamdera.alternativeImplementation (Stuff.package cache pkg vsn </> "artifacts.x.dat")
& Lamdera.alternativeImplementation (Stuff.package cache pkg vsn </> Lamdera.Version.artifacts)
ifaces = gatherInterfaces exposedDict results
objects = gatherObjects results
artifacts = Artifacts ifaces objects
Expand Down Expand Up @@ -622,6 +624,7 @@ crawlModule foreignDeps mvar pkg src docsStatus name =
crawlFile :: Map.Map ModuleName.Raw ForeignInterface -> MVar StatusDict -> Pkg.Name -> FilePath -> DocsStatus -> ModuleName.Raw -> FilePath -> IO (Maybe Status)
crawlFile foreignDeps mvar pkg src docsStatus expectedName path =
do bytes <- File.readUtf8 path
& Lamdera.alternativeImplementationPassthrough (Lamdera.PackageReplacements.get pkg expectedName Lamdera.PackageReplacements.elm)
case Parse.fromByteString (Parse.Package pkg) bytes of
Right modul@(Src.Module (Just (A.At _ actualName)) _ _ imports _ _ _ _ _) | expectedName == actualName ->
do deps <- crawlImports foreignDeps mvar pkg src imports
Expand Down Expand Up @@ -649,6 +652,7 @@ crawlKernel foreignDeps mvar pkg src name =
if exists
then
do bytes <- File.readUtf8 path
& Lamdera.alternativeImplementationPassthrough (Lamdera.PackageReplacements.get pkg name Lamdera.PackageReplacements.kernel)
case Kernel.fromByteString pkg (Map.mapMaybe getDepHome foreignDeps) bytes of
Nothing ->
return Nothing
Expand Down
2 changes: 2 additions & 0 deletions builder/src/Stuff.hs
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Expand Up @@ -36,13 +36,15 @@ import qualified Elm.Version as V

import Lamdera ((&))
import qualified Lamdera
import qualified Lamdera.Version

-- PATHS


stuff :: FilePath -> FilePath
stuff root =
root </> "elm-stuff" </> compilerVersion
& Lamdera.alternativeImplementation (root </> "elm-stuff" </> Lamdera.Version.medium)


details :: FilePath -> FilePath
Expand Down
2 changes: 1 addition & 1 deletion compiler/src/Generate/Html.hs
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Expand Up @@ -84,7 +84,7 @@ sandwich_ root moduleName javascript =

<body>

<pre id="elm"></pre>
<pre data-elm id="elm"></pre>

<script>
try {
Expand Down
3 changes: 1 addition & 2 deletions extra/Lamdera/CLI/Reset.hs
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Expand Up @@ -58,8 +58,7 @@ run () () = do
progress $ "Removing artifacts in " <> elmHome
let packageDir = elmHome </> Lamdera.Version.elm </> "packages"
onlyWhen_ (doesDirectoryExist packageDir) $ do
callCommand $ "find " <> packageDir <> " | grep artifacts.dat | xargs rm -r"
callCommand $ "find " <> packageDir <> " | grep artifacts.x.dat | xargs rm -r"
callCommand $ "find " <> packageDir <> " | grep 'artifacts.*\\.dat' | xargs rm -r"
else do
nukeDir elmHome

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1 change: 1 addition & 0 deletions extra/Lamdera/Evergreen/Snapshot.hs
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Expand Up @@ -648,6 +648,7 @@ canonicalToFt version scope interfaces recursionSet canonical tvarMap =


-- Kernel concessions for Frontend Model and Msg
("elm", "browser", "Browser.Navigation", "Key") -> ("Browser.Navigation.Key", Set.singleton moduleName, Map.empty)
("elm", "file", "File", "File") -> ("File.File", Set.singleton moduleName, Map.empty)
("elm-explorations", "webgl", "WebGL.Texture", "Texture") -> ("WebGL.Texture.Texture", Set.singleton moduleName, Map.empty)

Expand Down
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