feat(pipeline): refactor into its own project

2026-02-20 17:54:12 +01:00
parent 0ea5808cd2
commit dc348185a7
17 changed files with 490 additions and 358 deletions
--- a/pipeline/flake.nix
+++ b/pipeline/flake.nix
@@ -0,0 +1,69 @@
+{
+  description = "Org-roam export pipeline — Elixir escript";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        fs = pkgs.lib.fileset;
+
+        # Emacs with ox-hugo — needed at runtime by the pipeline escript
+        # (export_org_files calls `emacs --batch` with ox-hugo).
+        emacsWithOxHugo = (pkgs.emacsPackagesFor pkgs.emacs-nox).emacsWithPackages
+          (epkgs: [ epkgs.ox-hugo ]);
+
+        # Pre-fetched Hex/Mix dependencies.
+        # src is filtered to mix.exs + mix.lock so source edits don't
+        # invalidate this derivation.
+        mixDeps = pkgs.beamPackages.fetchMixDeps {
+          pname = "pipeline-mix-deps";
+          version = "0.1.0";
+          src = fs.toSource {
+            root = ./.;
+            fileset = fs.unions [
+              ./mix.exs
+              ./mix.lock
+            ];
+          };
+          sha256 = "sha256-E79X+nUy86G1Jrwv3T7dXekoGv8Hd14ZgJSKWjvlmAw=";
+        };
+
+        # Compiled pipeline escript (without runtime wrappers).
+        pipelineEscript = pkgs.beamPackages.mixRelease {
+          pname = "pipeline";
+          version = "0.1.0";
+          src = ./.;
+
+          escriptBinName = "pipeline";
+          mixFodDeps = mixDeps;
+
+          stripDebug = true;
+        };
+
+        # Wrapped pipeline that puts emacs (with ox-hugo) on PATH so
+        # the escript's System.cmd("emacs", ...) calls succeed.
+        pipelineApp = pkgs.writeShellApplication {
+          name = "pipeline";
+          runtimeInputs = [ emacsWithOxHugo ];
+          text = ''
+            exec ${pipelineEscript}/bin/pipeline "$@"
+          '';
+        };
+      in
+      {
+        packages.default = pipelineApp;
+        packages.escript = pipelineEscript;
+
+        devShells.default = pkgs.mkShell {
+          buildInputs = [
+            pkgs.elixir
+            emacsWithOxHugo
+          ];
+        };
+      });
+}