1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
# Maintainer: Sean Behan <codebam@riseup.net>
#
# The shell drawn by Chromium, started as a child process and driven over the
# DevTools protocol. This links no engine at all: the browser is a runtime
# dependency, and which Chromium it runs can change without a rebuild.
#
# One of nine recipes under packaging/aur: three engines — see
# docs/shell-backends.md — each as this, a `-git` form following `main`, and a
# `-bin` form unpacking the release. Every one of them installs a binary called
# `viewport` and provides that name, so they conflict with each other: a machine
# takes one engine in one form.
pkgname=viewport-chromium
pkgver=0.3.0
pkgrel=1
pkgdesc='Wayland compositor whose shell is a web page — Chromium, driven as a child process'
arch=('x86_64' 'aarch64')
url='https://github.com/codebam/viewport'
license=('GPL-3.0-or-later')
# The tag this package was cut from, and the whole of what makes it
# reproducible: a branch would move under it, and a PKGBUILD that follows a
# moving branch does not describe any particular package.
#
# A tag while there is one, a commit while there is not. Between releases this
# carries `_commit` and a `pkgver` of the git-describe form — the last release,
# how many commits past it, and which one — because naming a stale tag would be
# a lie about what was built. At a release the two say the same thing and the
# tag is the one anybody can check.
_tag=v0.3.0
depends=(
'wayland'
'libxkbcommon'
'libdrm'
'libinput'
'seatd'
'systemd-libs'
'mesa'
'libglvnd'
'vulkan-icd-loader'
'pipewire'
'libxcb'
'chromium'
)
optdepends=(
'xorg-xwayland: X11 clients'
'xdg-desktop-portal-gtk: the portal interfaces the compositor does not answer itself'
# Vulkan is the renderer wherever a Vulkan device owns the display; without
# one the compositor draws with OpenGL instead, so these are what decide
# which of the two a machine gets rather than whether it starts at all.
'vulkan-radeon: AMD hardware'
'vulkan-intel: Intel hardware'
'nvidia-utils: NVIDIA hardware, and hardware video decode with it'
# In a virtual machine: Venus passes Vulkan through to the host's GPU, and
# needs the host to offer it — QEMU wants
# `-device virtio-gpu-gl-pci,venus=on,blob=on,hostmem=2G`. Without it the
# only device that loads is lavapipe, which owns no DRM node, cannot drive
# a display, and turns every shell-frame copy into a copy on the CPU.
'vulkan-virtio: a virtual machine with 3D acceleration'
'vulkan-swrast: software Vulkan, for tests rather than a session'
'libva-mesa-driver: hardware video decode, for zero-copy video'
# The bar's icons are Material Design glyphs from a Nerd Font patch, and the
# family names in data/shell/shell.css are the ones fontconfig reports:
# "FiraCode Nerd Font" first, "Symbols Nerd Font" as the fallback that
# carries the glyphs without the monospace face. With neither installed the
# bar still lays out and every icon in it is a replacement box.
'ttf-firacode-nerd: the icons in the bar, and the font the shell names first'
'ttf-nerd-fonts-symbols: the icons in the bar, without the patched monospace family'
)
makedepends=(
# cargo comes with it: Arch has no separate cargo package, and naming
# one fails dependency resolution before a line is compiled.
'rust'
'git'
'pkgconf'
'clang'
'vulkan-headers'
'wayland-protocols'
)
provides=("viewport=$pkgver")
conflicts=('viewport'
'viewport-wpe'
'viewport-webkitgtk')
options=('!lto')
source=("git+https://github.com/codebam/viewport.git#tag=$_tag")
sha256sums=('SKIP')
prepare() {
cd "$srcdir/viewport"
# A git dependency (the smithay fork, for the tearing-control patch) has to
# be fetched here rather than during build(), so build() is the only step
# that has to work offline.
export RUSTUP_TOOLCHAIN=stable
cargo fetch --locked --target "$(rustc -vV | sed -n 's/host: //p')"
}
build() {
cd "$srcdir/viewport"
export RUSTUP_TOOLCHAIN=stable
export CARGO_TARGET_DIR=target
cargo build --frozen --release -p viewport -p viewport-shell-chromium
}
package() {
cd "$srcdir/viewport"
# Which engine this package installed, said outright. The binary picks a
# default of its own and cannot know which shell program is beside it, so a
# wrapper names it. `${VIEWPORT_SHELL_BACKEND:-}` first, so `--shell-backend`
# and the config file still win.
install -Dm755 target/release/viewport "$pkgdir/usr/lib/viewport/viewport"
install -Dm755 /dev/stdin "$pkgdir/usr/bin/viewport" <<'EOF'
#!/bin/sh
export VIEWPORT_SHELL_BACKEND="${VIEWPORT_SHELL_BACKEND:-chromium}"
export VIEWPORT_CHROMIUM_BIN="${VIEWPORT_CHROMIUM_BIN:-/usr/bin/chromium}"
# And where the shell is. The compositor finds its own assets at
# `<prefix>/share/viewport`, taken from the directory two above the binary —
# which works for /usr/bin/viewport and does not for the wrapped layout here:
# /usr/lib/viewport/viewport gives /usr/lib/share/viewport, nothing is there,
# and it falls back to `$PWD/data/shell`. A login shell starts in $HOME, so
# that is a black screen with a working cursor and one line in the log:
#
# the shell page failed to load from file:///home/you/data/shell/index.html
#
# Set only when unset, so --url and the config file still win.
export VIEWPORT_SHELL_URL="${VIEWPORT_SHELL_URL:-file:///usr/share/viewport/shell/index.html}"
exec /usr/lib/viewport/viewport "$@"
EOF
install -Dm755 target/release/viewport-shell-chromium \
"$pkgdir/usr/lib/viewport/viewport-shell-chromium"
# The shell itself, and the page it falls back to. Without them an installed
# compositor has nothing to load: the default URL resolves beside the binary,
# and a session started from a login shell has no source tree under it.
install -dm755 "$pkgdir/usr/share/viewport"
cp -r data/shell "$pkgdir/usr/share/viewport/shell"
install -Dm644 data/fallback.html "$pkgdir/usr/share/viewport/fallback.html"
install -Dm644 data/config.example.json \
"$pkgdir/usr/share/viewport/config.example.json"
# How xdg-desktop-portal learns this backend exists. Without the file the
# frontend does not know the name "viewport" refers to anything, so a config
# naming it matches nothing and the request goes elsewhere.
install -Dm644 data/portal-share/xdg-desktop-portal/portals/viewport.portal \
"$pkgdir/usr/share/xdg-desktop-portal/portals/viewport.portal"
# The session target the compositor starts on launch. Without it
# graphical-session.target stays inactive, and xdg-desktop-portal — which
# holds Requisite=graphical-session.target — refuses to start at all, taking
# the Settings interface and every application's dark theme with it.
install -Dm644 data/systemd/user/viewport-session.target \
"$pkgdir/usr/lib/systemd/user/viewport-session.target"
install -Dm644 docs/viewport.1 "$pkgdir/usr/share/man/man1/viewport.1"
install -Dm644 LICENSE "$pkgdir/usr/share/licenses/$pkgname/LICENSE" 2>/dev/null || true
install -Dm644 /dev/stdin "$pkgdir/usr/share/wayland-sessions/viewport.desktop" <<'EOF'
[Desktop Entry]
Name=Viewport
Comment=Wayland compositor with a Chromium shell
Exec=viewport
Type=Application
EOF
}
|