From cbde891d1ced129f6284cbadade652182aa5d2fb Mon Sep 17 00:00:00 2001
From: Chris Wells <chris@mathematicaster.org>
Date: Wed, 14 Feb 2024 15:13:20 -0600
Subject: Fixing my earlier mistakes

---
 modules/build.nix | 174 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 modules/build.nix

(limited to 'modules/build.nix')

diff --git a/modules/build.nix b/modules/build.nix
new file mode 100644
index 0000000..dfff338
--- /dev/null
+++ b/modules/build.nix
@@ -0,0 +1,174 @@
+{ config, pkgs, lib, ... }:
+with builtins // lib;
+let
+  cfg = config.build;
+
+  copyFileFunc = ''
+    function copyFile() {
+      local SOURCE="$1"
+      local RELTARGET="$2"
+      local EXECUTABLE="3"
+
+      local TARGET
+      TARGET="$(realpath -m "$REALOUT/$RELTARGET")"
+      if [[ ! $TARGET == $REALOUT* ]]; then
+        echo "Error installing file $RELTARGET outside of kobo src" >&2
+        exit 1
+      fi
+
+      mkdir -pv "$(dirname "$TARGET")"
+      if [[ -d "$SOURCE" ]]; then
+        if [[ -d "$TARGET" ]]; then
+          cp -rfv "$SOURCE/." "$TARGET/"
+        else
+          cp -rfv "$SOURCE" "$TARGET"
+        fi
+      else
+        cp -fv "$SOURCE" "$TARGET"
+      fi
+
+      if [[ "$EXECUTABLE" == "inherit" ]]; then
+        :
+      elif [[ "$EXECUTABLE" ]]; then
+        chmod +x "$TARGET"
+      else
+        chmod -x "$TARGET"
+      fi
+    }
+  '';
+
+  copyFile = { source, executable, target, ... }: ''
+    copyFile ${escapeShellArgs [
+      source
+      (if executable == null then "inherit" else toString executable)
+    ]}
+  '';
+
+  installFile = writeShellApplication {
+    name = "kobo-install-file";
+    runtimeInputs = [ pkgs.coreutils ];
+    text = ''
+      DRY_RUN_ARG="''${1-}"
+      LOCAL_DIR="''${2-}"
+      KOBO_DIR="''${3-}"
+      LOCAL_FILE="''${4-}"
+
+      FILENAME="''${LOCAL_FILE/#$LOCAL_DIR}"
+      KOBO_FILE="$KOBO_DIR/$FILENAME"
+
+      ${toShellVar "MANIFEST" (cfg.manifestLookupFor "$LOCAL_FILE" "$KOBO_FILE")}
+
+      ACTION="''${MANIFEST["$FILENAME"]}"
+
+      if [[ -n "$ACTION" ]]; then
+        $DRY_RUN_ARG eval "$ACTION"
+      elif [[ -d "$LOCAL_FILE" ]]; then
+        $DRY_RUN_ARG mkdir -p "$KOBO_FILE"
+      else
+        $DRY_RUN_ARG mkdir -p "$(dirname "$KOBO_FILE")"
+        $DRY_RUN_ARG cp -f "$LOCAL_FILE" "$KOBO_FILE"
+      fi
+    '';
+  };
+in {
+  options.build = {
+    allFiles = mkOption {
+      readOnly = true;
+      internal = true;
+      default = with config; concatMap (_: attrValues) [
+        file
+        kfmon.file
+        kobo.file
+        koreader.file
+        nickel.file
+        plato.file
+      ];
+      apply = filter (v: v.enable);
+    };
+
+    allManifests = mkOption {
+      readOnly = true;
+      internal = true;
+      default = with config; concatMap (_: attrValues) [
+        manifest
+        kfmon.manifest
+        kobo.manifest
+        koreader.manifest
+        nickel.manifest
+        plato.manifest
+      ];
+      apply = filter (v: v.enable);
+    };
+
+    manifestLookup = mkOption {
+      readOnly = true;
+      internal = true;
+      type = with types; attrsOf (functionTo (functionTo str));
+      default =
+      let
+        split = concatMap ({ targets, mergeTool, ... }: map (name: { inherit name; value = mergeTool; }) targets);
+      in listToAttrs split;
+    };
+
+    manifestLookupFor = mkOption {
+      readOnly = true;
+      internal = true;
+      type = with types; functionTo (functionTo (attrsOf str));
+      default = x: y: mapAttrs (_: f: f x y) cfg.manifestLookup;
+    };
+
+    src = mkOption {
+      type = types.package;
+      readOnly = true;
+      internal = true;
+      default = pkgs.stdenv.mkDerivation {
+        inherit (config) src;
+        name = "kobo_src";
+        phases = [ "installPhase" ];
+        installPhase = ''
+          mkdir -pv $out
+          cp -rv $src/. $out/
+          chmod -R +w $out
+
+          REALOUT="$(realpath -m "$out")"
+
+          ${copyFileFunc}
+
+          ${concatStringsSep "\n" (
+            mapAttrsToList (_: copyFile) cfg.allFiles
+          )}
+        '';
+      };
+    };
+
+    installer = mkOption {
+      type = types.package;
+      readOnly = true;
+      internal = true;
+      default = pkgs.writeShellApplication {
+        name = "kobo-installer";
+        runtimeInputs = [
+          pkgs.coreutils
+          pkgs.util-linux
+        ];
+        text = '' #TODO DRY_RUN_ARG
+          KOBO_LABEL="''${1:-KOBOeReader}"
+
+          KOBO_MOUNTPOINT="$(findmnt -nlo TARGET LABEL="$KOBO_LABEL")"
+          if [[ -z "$KOBO_MOUNTPOINT" ]]; then
+            echo "Couldn't find a Kobo eReader volume with label $KOBO_LABEL. Are you sure one is actually mounted?"
+            exit 255
+          fi
+
+          KOBO_DIR="$KOBO_MOUNTPOINT/.kobo"
+          if [[ ! -d "$KOBO_DIR" ]]; then
+            echo "It doesn't seem like $KOBO_MOUNTPOINT actually points to a Kobo eReader since it doesn't contain a .kobo directory . . . "
+            exit 255
+          fi
+
+          find "${cfg.src}/" -not -path "${cfg.src}/" -exec ${installFile}/bin/kobo-install-file "" "${cfg.src}" "$KOBO_DIR" {} \;
+        '';
+      };
+    };
+  };
+}
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