concat, concat-bin, concat-git: new packages

Concat (https://github.com/jub0t/Concat) is a Tauri 2 shell around a Rust
video engine, sold as a CapCut replacement. The project is mid-rename: the
binary, the desktop entry, the icons and the .deb asset all still say
WolfCut, so the packages install upstream's paths unchanged and add a
/usr/bin/concat symlink.

Upstream stages a static ffmpeg/ffprobe pair (180 MB) and whisper-cli
inside its bundle so the app runs on a machine with nothing installed.
Both lookups fall back to PATH, so concat-bin drops those two directories
and the source packages set WOLFCUT_SYSTEM_TOOLS=1 - the switch upstream
put in build.rs for exactly this case - leaving ffmpeg and whisper-cpp to
Arch. That is 17 MB installed instead of 225 MB.

!lto is not optional: makepkg's lto puts -flto=auto into CFLAGS, and ring
compiles hand-written assembly through cc, which then comes out as bitcode
and links to nothing.

sherpa-onnx-sys ships no C++ build; its build script downloads a prebuilt
static-lib archive. concat lists that archive as a checksummed source and
points the build script at it, with the version read out of upstream's
Cargo.lock by pkg.sh. concat-git cannot pin it - the version moves with
main - so there the build script fetches it.

Every upstream release is a v<version>-alpha.<n> prerelease published on a
push to main, several a day, and the release list is ordered by creation
rather than by version, so the newest is picked by publication date.

Only concat-git is published for now; concat and concat-bin are held back
with AUR_PUBLISH=false until that cadence has been lived with.

concat-git/PKGBUILD

@@ -0,0 +1,114 @@
+# Maintainer: Felitendo
+# This PKGBUILD is updated automatically:
+# https://github.com/Felitendo/PKGBUILDS
+
+pkgname=concat-git
+pkgver=0.2.0.alpha.16.r0.g8938ec3
+pkgrel=1
+pkgdesc="Free and open-source CapCut replacement, a Tauri video editor with a Rust engine (git)"
+arch=('x86_64')
+url="https://github.com/jub0t/Concat"
+license=('MPL-2.0')
+# glib-networking is what gives the webview a TLS backend; alsa-lib is the
+# engine's cpal playback backend; every media operation spawns the ffmpeg
+# pair - see the WOLFCUT_SYSTEM_TOOLS note below. The model downloads carry
+# their own TLS (rustls), so nothing here links openssl.
+depends=('webkit2gtk-4.1' 'gtk3' 'glib2' 'libsoup3' 'gdk-pixbuf2' 'cairo'
+         'dbus' 'glib-networking' 'alsa-lib' 'ffmpeg' 'gcc-libs' 'glibc'
+         'hicolor-icon-theme')
+makedepends=('rust' 'npm' 'pkgconf' 'git')
+# wgpu picks its backend at run time: Vulkan first, GL as the fallback. Both
+# loaders come from the driver stack every desktop already has, so neither is
+# a hard dependency of the editor.
+optdepends=('whisper-cpp: on-device auto-captions and transcription'
+            'vulkan-icd-loader: Vulkan compositor backend'
+            'libglvnd: OpenGL compositor backend')
+provides=('concat')
+conflicts=('concat')
+# !debug: the release profile already sets strip = true, so there is nothing
+# left to split into a debug package.
+# !lto: makepkg's lto puts -flto=auto into CFLAGS, and ring - the crypto
+# behind the model downloads' TLS - compiles hand-written assembly through
+# cc, which comes out as bitcode and links to nothing. Rust's own LTO is set
+# in the release profile and is unaffected.
+options=('!debug' '!lto')
+source=("${pkgname}::git+https://github.com/jub0t/Concat.git")
+sha256sums=('SKIP')
+
+pkgver() {
+  cd "$pkgname"
+  git describe --long --abbrev=7 --tags --match 'v[0-9]*' \
+    | sed 's/^v//; s/\([^-]*-g\)/r\1/; s/-/./g'
+}
+
+prepare() {
+  cd "$pkgname/desktop"
+
+  # the frontend toolchain (vite, tsc, tailwind) and the crate registry
+  npm ci --cache "$srcdir/npm-cache"
+
+  export RUSTUP_TOOLCHAIN=stable
+  cd src-tauri
+  cargo fetch --locked --target "$(rustc -vV | sed -n 's/^host: //p')"
+}
+
+build() {
+  cd "$pkgname/desktop"
+
+  export RUSTUP_TOOLCHAIN=stable
+  export CARGO_TARGET_DIR=target
+
+  # build.rs refuses a release build without a staged ffmpeg/whisper-cli,
+  # because a bundle that ships without them is broken when launched from a
+  # desktop file with no PATH to fall back on. A distribution package is the
+  # documented exception: the lookups fall back to PATH, and ffmpeg and
+  # whisper-cpp are packaged for Arch already.
+  export WOLFCUT_SYSTEM_TOOLS=1
+
+  # vite build -> desktop/dist, which tauri-build embeds into the binary
+  npm run build
+
+  cd src-tauri
+  # sherpa-onnx-sys, the text-to-speech backend, ships no C++ build: its build
+  # script downloads a prebuilt static-lib archive from its own release page.
+  # concat pins that archive as a checksummed source; here the version moves
+  # with main, so the build script fetches it - build() needs the network.
+  cargo build --release --frozen
+}
+
+package() {
+  cd "$pkgname"
+
+  # same paths the upstream .deb installs: the project is mid-rename and its
+  # executable, desktop entry and icons all still carry the old name
+  install -Dm755 "desktop/src-tauri/target/release/wolfcut-desktop" \
+    "$pkgdir/usr/bin/wolfcut-desktop"
+
+  # the AUR package is named after the project, the executable after what the
+  # project used to be called - keep it reachable under both
+  ln -s wolfcut-desktop "$pkgdir/usr/bin/concat"
+
+  # tauri only writes a desktop entry when it bundles, and the one it puts in
+  # the .deb has an empty Categories=. This is that entry with the categories
+  # upstream's Nix build sets.
+  install -Dm644 /dev/stdin "$pkgdir/usr/share/applications/WolfCut.desktop" <<'EOF'
+[Desktop Entry]
+Type=Application
+Name=WolfCut
+Comment=Free and open source video editor
+Exec=wolfcut-desktop
+Icon=wolfcut-desktop
+Terminal=false
+Categories=AudioVideo;AudioVideoEditing;
+StartupWMClass=wolfcut-desktop
+EOF
+
+  install -Dm644 "desktop/src-tauri/icons/32x32.png" \
+    "$pkgdir/usr/share/icons/hicolor/32x32/apps/wolfcut-desktop.png"
+  install -Dm644 "desktop/src-tauri/icons/128x128.png" \
+    "$pkgdir/usr/share/icons/hicolor/128x128/apps/wolfcut-desktop.png"
+  install -Dm644 "desktop/src-tauri/icons/128x128@2x.png" \
+    "$pkgdir/usr/share/icons/hicolor/256x256@2/apps/wolfcut-desktop.png"
+
+  install -Dm644 LICENSE "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
+}