Arch Linux User Repository

Your PKGBUILD should really use meson to build helvum as the upstream intended in the 1st place. Using cargo directly to build/install here is detrimental to the project as some upstream modifications are not reflected. As an example, the project just added a .desktop file to the meson build, but as you are not using meson, this change is not reflected in your AUR package.

Would it be possible to also install a .desktop file so we can launch this from application runners such as dmenu/KDE/GTK?

Confirming the current PKGBUILD compiles and creates the package successfully. However clang should be added to makedepends array. Without this the building may failed. Also check whether LIBCLANG_PATH environment variable sets to the path of any (libclang.so, libclang-*.so, libclang.so.*, libclang-*.so.*) of this soname.

it does not compile, here is one that works

pkgname='helvum-dev-git'
_pkgname='helvum'
pkgver=0.1.0.43.g2cb155c
pkgrel=1
pkgdesc="A GTK patchbay for pipewire."
arch=('i686' 'x86_64')
url="https://gitlab.freedesktop.org/ryuukyu/helvum"
license=('GPL3')
depends=('pipewire' 'gtk4')
makedepends=('rust' 'cargo' 'git')
provides=('helvum')
conflicts=('helvum' 'helvum-git')
source=("$_pkgname::git+https://gitlab.freedesktop.org/ryuukyu/helvum.git")
sha384sums=('SKIP')

pkgver() {
    cd "$_pkgname"
    echo "$(grep '^version =' Cargo.toml | head -n1 | awk -F '"' '{print $2}').$(git rev-list --count HEAD).g$(git rev-parse --short HEAD)"
}

build() {
    cd $_pkgname
    RUSTUP_TOOLCHAIN=stable cargo build --release --locked --all-features --target-dir=target
 }

package() {
    cd "$srcdir/$_pkgname"
    install -Dm 755 target/release/${_pkgname} -t "${pkgdir}/usr/bin"
    install -Dm 644 LICENSE "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
}

The cargo install in the PKGBUILD needs a --locked flag to avoid pulling in too new commits from the packages git dependencies to fix the failing build posted below.

Hello, thanks for your application! Unfortunately, it won't build on my machine.

warning: unused import: `self`
 --> src/controller.rs:3:17
  |
3 | use gtk::glib::{self, clone};
  |                 ^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

warning: unused import: `self`
 --> src/pipewire_connection.rs:1:17
  |
1 | use gtk::glib::{self, clone};
  |                 ^^^^

warning: unused import: `self`
  --> src/view/mod.rs:13:12
   |
13 |     glib::{self, clone},
   |            ^^^^

error[E0599]: no method named `expect` found for struct `gtk4::Application` in the current scope
  --> src/view/mod.rs:55:14
   |
55 |             .expect("Application creation failed");
   |              ^^^^^^ method not found in `gtk4::Application`

error[E0599]: no function or associated item named `get_default` found for struct `gtk4::gdk4::Display` in the current scope
  --> src/view/mod.rs:62:37
   |
62 |                 &gtk::gdk::Display::get_default().expect("Error initializing gtk css provider."),
   |                                     ^^^^^^^^^^^ function or associated item not found in `gtk4::gdk4::Display`

error[E0599]: no method named `get_settings` found for struct `ApplicationWindow` in the current scope
  --> src/view/mod.rs:78:18
   |
78 |                 .get_settings()
   |                  ^^^^^^^^^^^^ method not found in `ApplicationWindow`

error[E0061]: this function takes 0 arguments but 1 argument was supplied
  --> src/view/mod.rs:95:18
   |
95 |         self.app.run(&std::env::args().collect::<Vec<_>>())
   |                  ^^^ ------------------------------------- supplied 1 argument
   |                  |
   |                  expected 0 arguments
   |
note: associated function defined here
  --> /home/icar/.cargo/git/checkouts/gtk-rs-48ef14c1f17c79fb/f042a44/gio/src/application.rs:15:8
   |
15 |     fn run(&self) -> i32;
   |        ^^^

error[E0599]: no method named `get_widget` found for reference `&EventControllerMotion` in the current scope
  --> src/view/graph_view.rs:41:22
   |
41 |                     .get_widget()
   |                      ^^^^^^^^^^ method not found in `&EventControllerMotion`

error[E0599]: no method named `get_current_event` found for reference `&EventControllerMotion` in the current scope
  --> src/view/graph_view.rs:49:26
   |
49 |                         .get_current_event()
   |                          ^^^^^^^^^^^^^^^^^ method not found in `&EventControllerMotion`

error[E0599]: no method named `get_allocation` found for reference `&graph_view::GraphView` in the current scope
  --> src/view/graph_view.rs:74:32
   |
74 |             let alloc = widget.get_allocation();
   |                                ^^^^^^^^^^^^^^ method not found in `&graph_view::GraphView`

error[E0599]: no method named `get_style_context` found for reference `&graph_view::GraphView` in the current scope
  --> src/view/graph_view.rs:86:40
   |
86 |             if let Some(rgba) = widget.get_style_context().lookup_color("text_view_bg") {
   |                                        ^^^^^^^^^^^^^^^^^ method not found in `&graph_view::GraphView`

error[E0599]: no method named `get_instance` found for reference `&graph_view::imp::GraphView` in the current scope
   --> src/view/graph_view.rs:125:39
    |
125 |                 .for_each(|node| self.get_instance().snapshot_child(node, snapshot));
    |                                       ^^^^^^^^^^^^ method not found in `&graph_view::imp::GraphView`

error[E0599]: no method named `get_allocation` found for reference `&gtk4::Button` in the current scope
   --> src/view/graph_view.rs:146:27
    |
146 |             } = from_port.get_allocation();
    |                           ^^^^^^^^^^^^^^ method not found in `&gtk4::Button`

error[E0599]: no method named `get_ancestor` found for reference `&gtk4::Button` in the current scope
   --> src/view/graph_view.rs:148:18
    |
148 |                 .get_ancestor(Node::static_type())
    |                  ^^^^^^^^^^^^ method not found in `&gtk4::Button`

error[E0599]: no method named `get_allocation` found for reference `&gtk4::Button` in the current scope
   --> src/view/graph_view.rs:160:25
    |
160 |             } = to_port.get_allocation();
    |                         ^^^^^^^^^^^^^^ method not found in `&gtk4::Button`

error[E0599]: no method named `get_ancestor` found for reference `&gtk4::Button` in the current scope
   --> src/view/graph_view.rs:162:18
    |
162 |                 .get_ancestor(Node::static_type())
    |                  ^^^^^^^^^^^^ method not found in `&gtk4::Button`

error[E0599]: no method named `get_layout_manager` found for reference `&graph_view::GraphView` in the current scope
   --> src/view/graph_view.rs:252:14
    |
252 |             .get_layout_manager()
    |              ^^^^^^^^^^^^^^^^^^ method not found in `&graph_view::GraphView`

error[E0599]: no method named `get_widget` found for reference `&EventControllerMotion` in the current scope
  --> src/view/node.rs:41:22
   |
41 |                     .get_widget()
   |                      ^^^^^^^^^^ method not found in `&EventControllerMotion`

error[E0599]: no method named `get_widget` found for reference `&EventControllerMotion` in the current scope
  --> src/view/node.rs:56:22
   |
56 |                     .get_widget()
   |                      ^^^^^^^^^^ method not found in `&EventControllerMotion`

error: aborting due to 16 previous errors; 3 warnings emitted

Some errors have detailed explanations: E0061, E0599.
For more information about an error, try `rustc --explain E0061`.
error: could not compile `helvum`