ci: build on bread-ecosystem's shared Arch container

Route dev/beta/release build steps through ci/build.sh, pinned to
bread-ecosystem@147cfbb, instead of installing toolchain/libraries
directly on the bare runner. Adds ci/deps.txt for the build-time-only
packages breadcast needs beyond the shared image's base set (jsoncpp
and libcrypto for breadcast-caststream-sys's build.rs; gstreamer and
gst-plugins-base-libs for the gstreamer-app/-video sys crates) --
deliberately excludes bakery.toml's runtime-only plugin deps
(pipewire/bad/hlssink3/va), which are loaded dynamically by name and
never linked at compile time. Also adds check.yml to run clippy/test
on feature/fix branches ahead of a release build, matching breadpad's
already-migrated pattern.

.forgejo/workflows/beta-release.yml

@@ -20,7 +20,7 @@ jobs:
             "https://git.breadway.dev/${GITHUB_REPOSITORY}.git" src
 
       - name: build
-        run: cd src && cargo build --release --locked
+        run: cd src && bash ci/build.sh cargo build --release --locked
 
       - name: compute beta version
         run: |

.forgejo/workflows/check.yml

@@ -0,0 +1,24 @@
+name: check
+
+# Fast-fail lint/test on short-lived work branches, before it ever reaches
+# main and triggers a dev-track release build.
+on:
+  push:
+    branches: ['feature/**', 'fix/**']
+
+jobs:
+  check:
+    runs-on: [self-hosted, hestia]
+    steps:
+      - name: checkout
+        run: |
+          set -euo pipefail
+          rm -rf src && mkdir src
+          git clone --branch "${GITHUB_REF_NAME}" --depth 1 \
+            "https://git.breadway.dev/${GITHUB_REPOSITORY}.git" src
+
+      - name: clippy
+        run: cd src && bash ci/build.sh cargo clippy --workspace --all-targets --locked -- -D warnings
+
+      - name: test
+        run: cd src && bash ci/build.sh cargo test --workspace --locked

.forgejo/workflows/dev-release.yml

@@ -20,7 +20,7 @@ jobs:
             "https://git.breadway.dev/${GITHUB_REPOSITORY}.git" src
 
       - name: build
-        run: cd src && cargo build --release --locked
+        run: cd src && bash ci/build.sh cargo build --release --locked
 
       - name: compute dev version
         run: |

.forgejo/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
             "https://git.breadway.dev/${GITHUB_REPOSITORY}.git" src
 
       - name: build
-        run: cd src && cargo build --release --locked
+        run: cd src && bash ci/build.sh cargo build --release --locked
 
       - name: prepare artifacts
         run: |

ci/bread-ecosystem.rev

@@ -0,0 +1 @@
+147cfbbf96ae4b171027defa1130d2caddb934b1

ci/build.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+# Delegates to bread-ecosystem's shared CI build image/script, pinned to
+# the commit in ci/bread-ecosystem.rev — not `main`. bread-ecosystem's CI
+# files now affect every product's release pipeline, so bumping the pin
+# is a deliberate act instead of silent drift (see the bread-theme test
+# that broke here for exactly that reason, before it was pinned by rev).
+#
+# Usage: ci/build.sh cargo build --release --locked
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+REV="$(cat "${ROOT}/ci/bread-ecosystem.rev")"
+
+CACHE_DIR="/tmp/bread-ecosystem-ci-${REV}"
+if [ ! -d "$CACHE_DIR" ]; then
+    rm -rf /tmp/bread-ecosystem-ci-*
+    git clone https://git.breadway.dev/Breadway/bread-ecosystem.git "$CACHE_DIR"
+    git -C "$CACHE_DIR" checkout --quiet "$REV"
+fi
+
+bash "${CACHE_DIR}/ci/build.sh" breadcast "$ROOT" "$@"

ci/deps.txt

@@ -0,0 +1,39 @@
+# Build-time deps layered onto the shared bread-ci image on top of its base
+# set (base-devel git pkgconf rust gtk4 libadwaita gtk4-layer-shell graphene
+# -- see bread-ecosystem's ci/Containerfile). This is NOT bakery.toml's
+# system_deps list (that's runtime: what an end-user machine needs to run
+# breadcast/breadcastd) -- it's what's actually pkg-config-probed or linked
+# against while *compiling* the crate, verified against:
+#
+#   - breadcast-caststream-sys/build.rs, which calls
+#     pkg_config::probe_library("jsoncpp") and
+#     pkg_config::probe_library("libcrypto") to build+link the vendored
+#     openscreen Cast Streaming C++ sources. `pacman -Fl jsoncpp` /
+#     `pacman -Fl openssl` confirm both ship their headers AND .pc files in
+#     the same package (jsoncpp.pc, libcrypto.pc) -- no separate -dev split
+#     on Arch, so the runtime package name is also the build-time one.
+#
+#   - Cargo.lock, which pulls in gstreamer-sys/-base-sys (breadcast-core,
+#     breadcastd depend on the `gstreamer` crate directly) and
+#     gstreamer-app-sys/-video-sys (breadcast-core's `gstreamer-app` /
+#     `gstreamer-video` deps, used by the capture/encode pipeline). Their
+#     .pc files (gstreamer-1.0.pc, gstreamer-base-1.0.pc from the
+#     `gstreamer` package; gstreamer-app-1.0.pc, gstreamer-video-1.0.pc from
+#     `gst-plugins-base-libs`) come from these two packages, not from
+#     `gtk4`'s own transitive pull of them -- listed explicitly here so the
+#     build doesn't silently depend on an incidental side effect of gtk4's
+#     dependency graph.
+#
+# Deliberately NOT included: gst-plugin-pipewire, gst-plugins-bad,
+# gst-plugin-hlssink3, gst-plugin-va (all in bakery.toml's system_deps).
+# These are GStreamer elements referenced only by factory-name string at
+# runtime (e.g. "vah264enc", "hlssink3" -- see breadcast-core/src/pipeline/
+# mod.rs), loaded dynamically via the plugin registry, never linked by any
+# Rust sys crate in Cargo.lock. `pacman -Fl` on all four ships no headers
+# breadcast compiles against (gst-plugin-hlssink3 has one .pc file,
+# gsthlssink3.pc, but nothing in Cargo.lock binds to it) -- pure runtime
+# dependencies, correctly excluded from the build image.
+gstreamer
+gst-plugins-base-libs
+jsoncpp
+openssl