Add GitHub Actions workflow for X11-only builds

[Copilot]

Description

Adds .github/workflows/build-x11.yml for manually triggered X11-only release builds. Produces downloadable eww-x11-linux artifact without Wayland dependencies.

Key changes:

• workflow_dispatch trigger for on-demand builds
• X11-specific dependency set (excludes libgtk-layer-shell-dev)
• --no-default-features --features x11 --locked for reproducible X11-only binaries
• Explicit permissions: contents: read for security

Usage

Trigger from Actions tab → "Build eww for X11" → Run workflow. Artifact available after ~10-15min build.

# Example: Extend for other platforms
- name: Build eww (Wayland)
  run: cargo build --release --no-default-features --features wayland --locked

Showcase

N/A - Infrastructure change

Additional Notes

Complements existing build.yml CI checks. Does not replace default feature builds.

Checklist

• All widgets I've added are correctly documented.
• I added my changes to CHANGELOG.md, if appropriate.
• The documentation in the docs/content/main directory has been adjusted to reflect my changes.
• I used cargo fmt to automatically format all code before committing

Original prompt

步骤：
Fork eww 仓库：https://github.com/elkowar/eww

创建 GitHub Actions workflow，在你 fork 的仓库里创建文件：
.github/workflows/build.yml
name: Build eww for X11

on:
workflow_dispatch: # 手动触发

jobs:
build:
runs-on: ubuntu-latest

steps:
- uses: actions/checkout@v4

- name: Install dependencies
  run: |
    sudo apt-get update
    sudo apt-get install -y libgtk-3-dev libpango1.0-dev libgdk-pixbuf-2.0-dev libcairo2-dev libglib2.0-dev

- name: Install Rust
  uses: dtolnay/rust-action@stable

- name: Build eww (X11)
  run: cargo build --release --no-default-features --features x11

- name: Upload artifact
  uses: actions/upload-artifact@v4
  with:
    name: eww-x11-linux
    path: target/release/eww

运行 Action：

去你 fork 的仓库 → Actions 标签
选择 "Build eww for X11"
点击 "Run workflow"
下载编译好的文件：

编译完成后（约 10-15 分钟）
在 Actions 运行结果里下载 eww-x11-linux artifact
安装到你的机器：

或者更简单：直接在你 fork 的仓库网页上创建这个文件，GitHub 会自动识别并显示 Action。

去试试吧！编译好了告诉我，我帮你配置漂亮的 Gruvbox 风格控制中心和 Dock！ 🚀

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[xixi230]

123

[Copilot]

Pull request overview

This PR adds a new GitHub Actions workflow for manually triggered X11-only builds of eww. The workflow produces downloadable artifacts without Wayland dependencies, allowing users to build X11-specific binaries on demand.

Changes:

• Added .github/workflows/build-x11.yml with manual trigger support
• Configured X11-specific dependencies (excluding libgtk-layer-shell-dev)
• Set up artifact upload for distributing compiled eww binaries

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Consider adding Rust compilation caching to significantly reduce build times for subsequent runs. The main build.yml workflow uses Swatinem/rust-cache@v2 after the Rust setup step, which caches compiled dependencies. Without caching, every workflow run will recompile all dependencies from scratch, potentially taking 10-15 minutes each time. Adding the cache step would reduce subsequent builds to just a few minutes.

Suggested change

	- name: Cache Rust build
	uses: Swatinem/rust-cache@v2