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Revamp 'outputs' (#102)
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@ -4,6 +4,7 @@
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- New features
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- #63: Add `config.haskellProjects.${name}.outputs` containing all flake outputs for that project.
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- #102 In addition, `outputs` contains `finalPackages` and `localPackages`.
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- #49 & #91: The `packages` option now autodiscovers the top-level `.cabal` file (in addition to looking inside sub-directories) as its default value.
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- #69: The default flake template creates `flake.nix` only, while the `#example` one creates the full Haskell project template.
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- #92: Add `devShell.mkShellArgs` to pass custom arguments to `mkShell`
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@ -86,6 +86,48 @@ in
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};
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};
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};
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outputsSubmodule = types.submodule {
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options = {
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finalOverlay = mkOption {
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type = types.raw;
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readOnly = true;
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internal = true;
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};
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finalPackages = mkOption {
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# This must be raw because the Haskell package set also contains functions.
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type = types.attrsOf types.raw;
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readOnly = true;
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description = ''
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The final Haskell package set including local packages and any
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overrides, on top of `basePackages`.
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'';
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};
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localPackages = mkOption {
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type = types.attrsOf types.package;
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readOnly = true;
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description = ''
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The local Haskell packages in the project.
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This is a subset of `finalPackages` containing only local
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packages excluding everything else.
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'';
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};
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devShell = mkOption {
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type = types.package;
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readOnly = true;
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description = ''
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The development shell derivation generated for this project.
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'';
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};
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hlsCheck = mkOption {
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type = types.package;
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readOnly = true;
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description = ''
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The `hlsCheck` derivation generated for this project.
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'';
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};
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};
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};
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projectSubmodule = types.submoduleWith {
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specialArgs = { inherit pkgs self; };
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modules = [
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@ -163,7 +205,7 @@ in
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default = { };
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};
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outputs = mkOption {
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type = types.attrsOf types.raw;
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type = outputsSubmodule;
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description = ''
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The flake outputs generated for this project.
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@ -171,21 +213,7 @@ in
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'';
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};
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# Derived options
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finalPackages = mkOption {
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type = types.attrsOf raw;
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readOnly = true;
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description = ''
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The final package set, based on `basePackages` plus
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the additions and overrides specified in the other options.
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'';
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};
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finalOverlay = mkOption {
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type = types.raw;
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readOnly = true;
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internal = true;
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};
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};
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}
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];
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@ -215,16 +243,32 @@ in
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in
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{
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packages =
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mergeMapAttrs (_: project: project.outputs.packages) config.haskellProjects;
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mergeMapAttrs
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(name: project:
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let
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mapKeys = f: attrs: lib.mapAttrs' (n: v: { name = f n; value = v; }) attrs;
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# Prefix package names with the project name (unless
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# project is named `default`)
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dropDefaultPrefix = packageName:
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if name == "default"
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then packageName
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else "${name}-${packageName}";
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in
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mapKeys dropDefaultPrefix project.outputs.localPackages)
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config.haskellProjects;
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devShells =
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mergeMapAttrs
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(_: project:
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lib.optionalAttrs project.devShell.enable project.outputs.devShells)
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(name: project:
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lib.optionalAttrs project.devShell.enable {
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"${name}" = project.outputs.devShell;
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})
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config.haskellProjects;
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checks =
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mergeMapAttrs
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(_: project:
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lib.optionalAttrs project.devShell.enable project.outputs.checks)
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(name: project:
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lib.optionalAttrs (project.devShell.enable && project.devShell.hlsCheck.enable) {
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"${name}-hls" = project.outputs.hlsCheck;
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})
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config.haskellProjects;
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};
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});
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@ -28,7 +28,7 @@ in
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config =
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let
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inherit (config) finalPackages;
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inherit (config.outputs) finalPackages finalOverlay;
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projectKey = name;
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@ -86,44 +86,31 @@ in
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});
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in
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{
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finalPackages = config.basePackages.extend config.finalOverlay;
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finalOverlay = lib.composeManyExtensions [
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# The order here matters.
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#
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# User's overrides (cfg.overrides) is applied **last** so
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# as to give them maximum control over the final package
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# set used.
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localPackagesOverlay
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(pkgs.haskell.lib.packageSourceOverrides config.source-overrides)
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config.overrides
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];
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outputs = {
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packages =
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let
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mapKeys = f: attrs: lib.mapAttrs' (n: v: { name = f n; value = v; }) attrs;
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# Prefix package names with the project name (unless
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# project is named `default`)
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dropDefaultPrefix = packageName:
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if projectKey == "default"
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then packageName
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else "${projectKey}-${packageName}";
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in
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mapKeys dropDefaultPrefix
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(lib.mapAttrs
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(name: _: finalPackages."${name}")
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config.packages);
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inherit devShell;
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devShells."${projectKey}" = devShell;
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finalOverlay = lib.composeManyExtensions [
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# The order here matters.
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#
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# User's overrides (cfg.overrides) is applied **last** so
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# as to give them maximum control over the final package
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# set used.
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localPackagesOverlay
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(pkgs.haskell.lib.packageSourceOverrides config.source-overrides)
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config.overrides
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];
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finalPackages = config.basePackages.extend finalOverlay;
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localPackages = lib.mapAttrs
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(name: _: finalPackages."${name}")
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config.packages;
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hlsCheck = runCommandInSimulatedShell
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devShell
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self "${projectKey}-hls-check"
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{ } "haskell-language-server";
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checks = lib.optionalAttrs config.devShell.hlsCheck.enable {
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"${projectKey}-hls" =
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runCommandInSimulatedShell
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devShell
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self "${projectKey}-hls-check"
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{ } "haskell-language-server";
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};
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};
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};
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}
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