Added snap packaging (#3931)

Added snap packaging, fixes #3153

If whoever registered the name in the snap store could add me as a
collaborator, I can handle getting it released in the store, setup
automated builds, and request the necessary classic permissions in the
store.

.github/workflows/test.yml

@@ -14,6 +14,7 @@ jobs:
       - build-bench
       - build-linux-libghostty
       - build-nix
+      - build-snap
       - build-macos
       - build-macos-matrix
       - build-windows
@@ -276,6 +277,32 @@ jobs:
           nix develop -c zig build --system ${{ steps.deps.outputs.deps }} -Dapp-runtime=glfw -Drenderer=metal -Dfont-backend=coretext_harfbuzz
           nix develop -c zig build --system ${{ steps.deps.outputs.deps }} -Dapp-runtime=glfw -Drenderer=metal -Dfont-backend=coretext_noshape
 
+  build-snap:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          [namespace-profile-ghostty-snap, namespace-profile-ghostty-snap-arm64]
+    runs-on: ${{ matrix.os }}
+    needs: test
+    env:
+      ZIG_LOCAL_CACHE_DIR: /zig/local-cache
+      ZIG_GLOBAL_CACHE_DIR: /zig/global-cache
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+      - name: Setup Cache
+        uses: namespacelabs/nscloud-cache-action@v1.2.0
+        with:
+          path: |
+            /nix
+            /zig
+      - run: sudo apt install -y udev
+      - run: sudo systemctl start systemd-udevd
+      - uses: snapcore/action-build@v1
+
   build-windows:
     runs-on: windows-2022
     # this will not stop other jobs from running

nix/devShell.nix

@@ -14,6 +14,7 @@
   python3,
   qemu,
   scdoc,
+  snapcraft,
   valgrind,
   #, vulkan-loader # unused
   vttest,
@@ -137,6 +138,7 @@ in
         qemu
 
         gdb
+        snapcraft
         valgrind
         wraptest
 

snap/local/launcher

@@ -0,0 +1,52 @@
+#!/bin/sh
+set -e
+
+# Set these to reasonable defaults if not already set
+if [ -z "$XDG_CONFIG_HOME" ]; then
+  export XDG_CONFIG_HOME="$SNAP_REAL_HOME/.config"
+fi
+
+if [ -z "$XDG_CACHE_HOME" ]; then
+  export XDG_CACHE_HOME="$SNAP_REAL_HOME/.cache"
+fi
+
+if [ -z "$XDG_DATA_HOME" ]; then
+  export XDG_DATA_HOME="$SNAP_REAL_HOME/.local/share"
+fi
+
+export HOME="$SNAP_REAL_HOME"
+
+if [ "$SNAP_ARCH" = "amd64" ]; then
+  ARCH="x86_64-linux-gnu"
+elif [ "$SNAP_ARCH" = "arm64" ]; then
+  ARCH="aarch64-linux-gnu"
+else
+  ARCH="$SNAP_ARCH-linux-gnu"
+fi
+
+export LD_LIBRARY_PATH=${SNAP}/usr/lib/${ARCH}:${SNAP}/usr/lib/${ARCH}/vdpau:${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}
+export LIBGL_DRIVERS_PATH=${LIBGL_DRIVERS_PATH:+$LIBGL_DRIVERS_PATH:}${SNAP}/usr/lib/${ARCH}/dri/
+export LIBVA_DRIVERS_PATH=${LIBVA_DRIVERS_PATH:+$LIBVA_DRIVERS_PATH:}${SNAP}/usr/lib/${ARCH}/dri/
+export __EGL_VENDOR_LIBRARY_DIRS=${__EGL_VENDOR_LIBRARY_DIRS:+$__EGL_VENDOR_LIBRARY_DIRS:}${SNAP}/usr/share/glvnd/egl_vendor.d
+export __EGL_EXTERNAL_PLATFORM_CONFIG_DIRS=${__EGL_EXTERNAL_PLATFORM_CONFIG_DIRS:+$__EGL_EXTERNAL_PLATFORM_CONFIG_DIRS:}${SNAP}/usr/share/egl/egl_external_platform.d
+export DRIRC_CONFIGDIR=${SNAP}/usr/share/drirc.d
+export VK_LAYER_PATH=${VK_LAYER_PATH:+$VK_LAYER_PATH:}${SNAP}/usr/share/vulkan/implicit_layer.d/:${SNAP}/usr/share/vulkan/explicit_layer.d/
+export XDG_DATA_DIRS=${XDG_DATA_DIRS:+$XDG_DATA_DIRS:}${SNAP}/usr/share
+export XLOCALEDIR="${SNAP}/usr/share/X11/locale"
+export GDK_PIXBUF_MODULE_FILE="$XDG_CACHE_HOME/gdk-pixbuf-loaders.cache"
+export GDK_PIXBUF_MODULEDIR="$SNAP/usr/lib/$ARCH/gdk-pixbuf-2.0/2.10.0/loaders"
+export GTK_PATH="$SNAP/usr/lib/$ARCH/gtk-4.0"
+
+if [ "${__NV_PRIME_RENDER_OFFLOAD:-}" != 1 ]; then
+  # Prevent picking VA-API (Intel/AMD) over NVIDIA VDPAU
+  # https://download.nvidia.com/XFree86/Linux-x86_64/510.54/README/primerenderoffload.html#configureapplications
+  export LIBVA_DRIVERS_PATH
+fi
+
+# Unset all SNAP specific environment variables to keep them from leaking
+# into other snaps that might get executed from within the shell
+for var in $(printenv | grep SNAP_ | cut -d= -f1); do
+  unset $var
+done
+
+exec "$@"

snap/snapcraft.yaml

@@ -0,0 +1,139 @@
+name: ghostty
+base: core24
+summary: A terminal emulator
+description: |
+  Ghostty is a fast, feature-rich, and cross-platform terminal emulator that
+  uses platform-native UI and GPU acceleration.
+grade: stable
+confinement: classic
+contact: https://github.com/ghostty-org/ghostty/discussions
+issues: https://github.com/ghostty-org/ghostty/issues
+website: https://ghostty.org
+license: MIT
+icon: images/icons/icon_512.png
+adopt-info: ghostty
+
+platforms:
+  amd64:
+  arm64:
+
+apps:
+  ghostty:
+    command: bin/ghostty
+    command-chain: [bin/launcher]
+    completer: share/bash-completion/completions/ghostty.bash
+    desktop: share/applications/com.mitchellh.ghostty.desktop
+    #refresh-mode: ignore-running # Store rejects this, needs fix in review-tools
+    environment:
+      PATH: /snap/ghostty/current/bin:/snap/ghostty/current/usr/bin:$PATH
+      LC_ALL: C.UTF-8
+      GHOSTTY_RESOURCES_DIR: /snap/ghostty/current/share/ghostty
+
+parts:
+  launcher:
+    plugin: dump
+    source: snap/local
+    source-type: local
+    organize:
+      launcher: bin/
+
+  zig:
+    plugin: nil
+    build-packages:
+      - curl
+    override-pull: |
+      set -ex
+      case "$CRAFT_ARCH_BUILD_FOR" in
+        amd64)  arch=x86_64    ;;
+        arm64)  arch=aarch64  ;;
+        *)      arch=""     ;;
+      esac
+
+      rm -rf $CRAFT_PART_SRC/*
+
+      if [[ -n $arch ]]; then
+        curl -LO --retry-connrefused --retry 10 https://ziglang.org/download/0.13.0/zig-linux-$arch-0.13.0.tar.xz
+      else
+        echo "Unsupported arch"
+        exit 1
+      fi
+
+      tar xf zig-lin*xz
+      rm -f *xz
+      mv zig-linux*/* .
+    prime:
+      - -*
+
+  ghostty:
+    source: .
+    after: [zig]
+    plugin: nil
+    build-attributes: [enable-patchelf]
+    build-packages:
+      - libgtk-4-dev
+      - libadwaita-1-dev
+      - git
+      - patchelf
+    override-build: |
+      craftctl set version=$(git describe --abbrev=8)
+      $CRAFT_PART_SRC/../../zig/src/zig build -Dpatch-rpath=\$ORIGIN/../usr/lib/$CRAFT_ARCH_TRIPLET_BUILD_FOR:/snap/core24/current/lib/$CRAFT_ARCH_TRIPLET_BUILD_FOR -Doptimize=ReleaseFast
+      cp -rp zig-out/* $CRAFT_PART_INSTALL/
+      sed -i 's|Icon=com.mitchellh.ghostty|Icon=/snap/ghostty/current/share/icons/hicolor/512x512/apps/com.mitchellh.ghostty.png|g' $CRAFT_PART_INSTALL/share/applications/com.mitchellh.ghostty.desktop
+
+  libs:
+    plugin: nil
+    build-attributes: [enable-patchelf]
+    stage-packages:
+      - libadwaita-1-0
+      - libglib2.0-0t64
+      - libgtk-4-1
+      - libgtk-4-media-gstreamer
+      - ibus-gtk4
+      - libpciaccess0
+      - libtinfo6
+      - libedit2
+      - libelf1t64
+      - libsensors5
+      - libllvm17
+      - libunistring5
+      - librsvg2-2
+      - on amd64:
+          [
+            i965-va-driver,
+            libdrm-intel1,
+            libdrm-nouveau2,
+            libdrm-amdgpu1,
+            libdrm-radeon1,
+          ]
+    stage:
+      # The libraries in dri need no-patchelf, so they come from the mesa-unpatched part
+      - -usr/lib/*/dri
+
+  mesa:
+    plugin: nil
+    build-attributes: [enable-patchelf]
+    stage-packages:
+      - libglu1-mesa
+      - libgl1-mesa-dri
+      - libegl-mesa0
+      - libegl1
+      - libglx-mesa0
+      - mesa-libgallium
+    stage:
+      # The libraries in dri need no-patchelf, so they come from the mesa-unpatched part
+      - usr/lib/*/*.so*
+      - usr/lib/*/dri/libdril_dri.so
+      - -usr/lib/*/libgallium*so
+      - -usr/lib/*/dri
+
+  mesa-gl1-dri:
+    plugin: nil
+    stage-packages:
+      - libgl1-mesa-dri
+    build-attributes: [no-patchelf]
+    stage:
+      # Only the libraries in dri need to not be patched, the rest come from the mesa part
+      # Otherwise snapcraft may strip the build ID and cause the driver to crash
+      - usr/lib/*/libgallium*so
+      - -usr/lib/*/dri/libdril_dri.so
+      - usr/lib/*/dri

src/apprt/gtk/Surface.zig

@@ -2264,6 +2264,23 @@ pub fn defaultTermioEnv(self: *Surface) !std.process.EnvMap {
     env.remove("GDK_DISABLE");
     env.remove("GSK_RENDERER");
 
+    // Unset environment varies set by snaps if we're running in a snap.
+    // This allows Ghostty to further launch additional snaps.
+    if (env.get("SNAP")) |_| {
+        env.remove("SNAP");
+        env.remove("DRIRC_CONFIGDIR");
+        env.remove("__EGL_EXTERNAL_PLATFORM_CONFIG_DIRS");
+        env.remove("__EGL_VENDOR_LIBRARY_DIRS");
+        env.remove("LD_LIBRARY_PATH");
+        env.remove("LIBGL_DRIVERS_PATH");
+        env.remove("LIBVA_DRIVERS_PATH");
+        env.remove("VK_LAYER_PATH");
+        env.remove("XLOCALEDIR");
+        env.remove("GDK_PIXBUF_MODULEDIR");
+        env.remove("GDK_PIXBUF_MODULE_FILE");
+        env.remove("GTK_PATH");
+    }
+
     if (self.container.window()) |window| {
         // On some window protocols we might want to add specific
         // environment variables to subprocesses, such as WINDOWID on X11.