flake-gimp/flake.nix

{
  description = "Nix Flake for GIMP 3.0.4 built from source";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    gimp-source = {
      url = "git+https://gitlab.gnome.org/GNOME/gimp";
      flake = false;
    };
    gimp-data = {
      url = "git+https://gitlab.gnome.org/GNOME/gimp-data";
      flake = false;
    };
  };
  outputs = { self, nixpkgs, flake-utils, gimp-source, gimp-data, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
      in
            {
        packages.default = pkgs.stdenv.mkDerivation {
          pname = "gimp";
          version = "3.0.4";
          
          src = pkgs.runCommand "merged-source" {} ''
            mkdir -p $out
            
            # Copy first repo (main source)
            cp -r --no-preserve=mode ${gimp-source}/* $out/
            
            mkdir -p $out/gimp-data
            cp -r --no-preserve=mode ${gimp-data}/* $out/gimp-data/
            
            chmod -R +r $out
            chmod -R +w $out
          '';

          nativeBuildInputs = with pkgs; [
            # Build tools
            git
            meson
            ninja
            pkg-config
            gettext
            python3Packages.pygobject3
            python3
          ];
          
          buildInputs = with pkgs; [
            #3
            babl
            gegl
            #4
            gtk3
            glib
            gdk-pixbuf
            pango
            #5
            cairo
            #6
            #??
            harfbuzz
            #7
            zlib
            libzip
            #??
            #8
            gexiv2
            #9
            libpng
            libjpeg
            libtiff
            librsvg
            lcms
            #10
            libmypaint
            #11
            mypaint-brushes1
            #12
            libsoup_3
            python3Packages.pycairo
            glib-networking
            #13
            openjpeg
            libmng
            libwmf
            #14
            libheif
            libde265
            libaom
            openjpeg
            #15
            #??
            #21 (mandatory packages)
            appstream-glib
            atk
            fontconfig
            freetype
            gvfs
            json-glib
            libarchive
            libpng
            librsvg
            libtiff
            poppler
            poppler_data
            perl

            # require only at build, not in install readme
            xorg.libXmu
            xorg.libXpm
            libxslt
            shared-mime-info
            
          ];
          
          configurePhase = ''
            export HOME=$TMPDIR/home
            mkdir -p $HOME/.local/share
            mkdir -p $HOME/.config
            
            export PKG_CONFIG_PATH="${pkgs.glib-networking}/lib/pkgconfig:${pkgs.glib}/lib/pkgconfig:$PKG_CONFIG_PATH"
            export GIO_MODULE_DIR="${pkgs.glib-networking}/lib/gio/modules"
            export FONTCONFIG_CACHE="$TMPDIR/fontconfig-cache"
            
            export XDG_DATA_HOME=$HOME/.local/share
            export XDG_CONFIG_HOME=$HOME/.config
            export XDG_CACHE_HOME=$TMPDIR/cache
            mkdir -p "$XDG_CACHE_HOME/fontconfig"
            mkdir -p "$FONTCONFIG_CACHE"
            export GIMP_TESTING=1
            export G_MESSAGES_DEBUG=""
            export DISPLAY=""
            export WAYLAND_DISPLAY=""
            export XDG_RUNTIME_DIR=""

            # Fontconfig setup
            export FONTCONFIG_FILE=${pkgs.fontconfig.out}/etc/fonts/fonts.conf
            
            git init
            git remote add origin 'https://gitlab.gnome.org/GNOME/gimp'
            #git submodule update --init
            meson _build \
              --prefix=$out \
              --buildtype=release \
              -Dgi-docgen=disabled \
              -Dlua=false 

            # Fxing these fkingujjckjvnbnsdsc shebangs <3 claude.ai thx for help
            patchShebangs . || true
            patchShebangs _build/ || true

            find . -type f -exec grep -l "#!/usr/bin/env" {} \; 2>/dev/null | while read file; do
              echo "Fixing shebang in: $file"
              sed -i 's|#!/usr/bin/env python3|#!${pkgs.python3}/bin/python3|g' "$file" || true
              sed -i 's|#!/usr/bin/env python|#!${pkgs.python3}/bin/python|g' "$file" || true
              sed -i 's|#!/usr/bin/env bash|#!${pkgs.bash}/bin/bash|g' "$file" || true
              sed -i 's|#!/usr/bin/env sh|#!${pkgs.bash}/bin/sh|g' "$file" || true
              sed -i 's|#!/usr/bin/env perl|#!${pkgs.perl}/bin/perl|g' "$file" || true
            done
          '';
          
          buildPhase = ''
          export LD_LIBRARY_PATH="$PWD/_build/libgimp:$PWD/_build/libgimpbase:$PWD/_build/libgimpcolor:$PWD/_build/libgimpconfig:$PWD/_build/libgimpmath:$PWD/_build/libgimpmodule:$PWD/_build/libgimpthumb:$PWD/_build/libgimpwidgets:$LD_LIBRARY_PATH"
            ninja -C _build -v
          '';
          
          installPhase = ''
            #mkdir -p $out/bin
            echo "Installing GIMP..."
            ninja -C _build install
            
            # Ensure the binary is executable
            chmod +x $out/bin/gimp-* || true
            # Install built files
            # make install PREFIX=$out
            # cp executable $out/bin/
          '';
        };
      }
    );
}