From 54210ddc9352ce60200695ff82d99bda4509c5ae Mon Sep 17 00:00:00 2001 From: Breadway Date: Sat, 15 Aug 2026 22:15:29 +0800 Subject: [PATCH] Emit bread.paper.changed after a successful set MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Link bread-utils v0.7.1 (bread-client) and publish { "path": "" } once awww + wal + bread-theme reload all succeed. Silent no-op if breadd is down. breadpaper is CLI-only — no watch subscriber; modules should bread.exec ("breadpaper set …"). See EVENTS.md. --- Cargo.lock | 377 ++++++++++++++++++++++++++++++++++++++++++++++++++--- Cargo.toml | 2 + EVENTS.md | 57 ++++++++ README.md | 7 + src/lib.rs | 29 ++++- 5 files changed, 452 insertions(+), 20 deletions(-) create mode 100644 EVENTS.md diff --git a/Cargo.lock b/Cargo.lock index f145084..a44fd0c 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -38,7 +38,7 @@ version = "1.1.5" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc" dependencies = [ - "windows-sys", + "windows-sys 0.61.2", ] [[package]] @@ -49,28 +49,58 @@ checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d" dependencies = [ "anstyle", "once_cell_polyfill", - "windows-sys", + "windows-sys 0.61.2", ] [[package]] name = "anyhow" -version = "1.0.102" +version = "1.0.104" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = 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+checksum = "e7a5d71263a5a7d47b41f6b3f06ba276f10cc18b0931f1799f710578e2309348" +dependencies = [ + "proc-macro2", + "quote", + "syn 3.0.3", +] + +[[package]] +name = "serde_json" +version = "1.0.151" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c841b55ecdae098c80dcae9cf767f6f8a0c2cdb3416bbef72181df4d0fe73f14" +dependencies = [ + "itoa", + "memchr", + "serde", + "serde_core", + "zmij", +] + +[[package]] +name = "serde_spanned" +version = "0.6.9" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bf41e0cfaf7226dca15e8197172c295a782857fcb97fad1808a166870dee75a3" +dependencies = [ + "serde", +] + [[package]] name = "strsim" version = "0.11.1" @@ -156,15 +336,87 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f" [[package]] name = "syn" -version = "2.0.118" +version = "2.0.119" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = 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"ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538" + +[[package]] +name = "winnow" +version = "0.7.15" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "df79d97927682d2fd8adb29682d1140b343be4ac0f08fd68b7765d9c059d3945" +dependencies = [ + "memchr", +] + +[[package]] +name = "zmij" +version = "1.0.23" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "29666d0abbfad1e3dc4dcf6144730dd3a3ab225bbbdac83319345b1b44ccfc1b" diff --git a/Cargo.toml b/Cargo.toml index da29e25..ff77e05 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -8,3 +8,5 @@ license = "MIT" [dependencies] clap = { version = "4", features = ["derive"] } anyhow = "1" +serde_json = "1" +bread-utils = { git = "https://git.breadway.dev/Breadway/bread-ecosystem", tag = "v0.7.1", features = ["bread-client"] } diff --git a/EVENTS.md b/EVENTS.md new file mode 100644 index 0000000..cf531a0 --- /dev/null +++ b/EVENTS.md @@ -0,0 +1,57 @@ +# breadpaper — bread event integration + +breadpaper is a one-shot CLI wallpaper setter: it works exactly the same +with or without `breadd` running. When breadd *is* present, each successful +`breadpaper set` (or the bare-path shorthand) publishes one event into the +shared bread automation fabric. See the parent `bread` repo's +`Documentation.md` — specifically its "Namespaces" and "Integrating a +bread\* app" sections — for the general convention this follows. + +App id: **`paper`**. Transport: `bread-utils`'s `bread_client` module +(feature `bread-client`) — the CLI links it directly and uses +`BreadClient::connect("paper")` + `emit` only. v0.7.1 has no `command()` +helper, and breadpaper has no long-running process that could hold a +`subscribe` open. + +There is no `breadpaper` daemon and no `watch` subcommand. A `bread-emit +bread.command.paper.set` (or any other `bread.command.paper.*`) with no +subscriber is a silent no-op — that is the documented bread convention, +not a breadpaper bug. Modules that want to change the wallpaper should +shell out: + +```lua +bread.exec("breadpaper set /path/to/image.png") +``` + +The one-shot process still emits `bread.paper.changed` on success, so a +workflow can `bread.wait("bread.paper.changed", …)` for the real outcome +instead of assuming the exec finished the set. + +## Events published (`bread.paper.*`) + +| Event | Data | When | +|-------|------|------| +| `bread.paper.changed` | `{ "path": "" }` | After a successful `set` (awww + wal + `bread-theme reload`). `path` is the canonical absolute path that was applied. Not emitted on `get`, and not emitted if any of the three steps fail. | + +## Commands honored (`bread.command.paper.*`) + +None, because there is nobody listening. + +| Verb | Data | Status | +|------|------|--------| +| `set` | `{ "path": "..." }` | **Not subscribed.** The same work is `bread.exec("breadpaper set …")`. A future `breadpaper watch` (or a service-mode of this binary) could honor `bread.command.paper.set` and emit `bread.paper.set.done` / `.failed`; that is deliberately not added here — a long-running process whose only job is to re-exec the existing one-shot CLI is not worth the extra surface. | + +### Not implemented: slideshow / library / random / next + +breadpaper is not a wallpaper library, a slideshow daemon, or a picker. +Browsing `~/Pictures/Backgrounds` lives in bos-settings. Do not invent +`bread.command.paper.next` / `.random` / `.cycle` (or matching events) +ahead of a real product feature. + +## Fail-safe behavior + +- If breadd isn't installed or isn't running, `emit` is a silent no-op + (`BreadClient::emit` never blocks or errors the caller) — breadpaper + still sets the wallpaper, generates the palette, and reloads themes. +- There is no command subscription to reconnect, because there is no + long-running subscriber. diff --git a/README.md b/README.md index d4b724b..3ab2b86 100644 --- a/README.md +++ b/README.md @@ -42,6 +42,13 @@ breadpaper get # print the current wallpaper path Supported formats: `png`, `jpg`, `jpeg`, `webp`, `gif`, `bmp`. +## Bread events + +After a successful `set`, breadpaper emits `bread.paper.changed` if +`breadd` is running (silent no-op if it isn't). There is no daemon and +no command subscription — Lua modules should `bread.exec("breadpaper set …")`. +See [EVENTS.md](EVENTS.md). + ## License MIT — see [LICENSE](LICENSE). diff --git a/src/lib.rs b/src/lib.rs index f990b9e..c9fa141 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -4,7 +4,12 @@ mod wallpaper; use std::path::{Path, PathBuf}; -use anyhow::{Context, Result, bail}; +use anyhow::{bail, Context, Result}; +use bread_utils::bread_client::BreadClient; + +/// App id in bread's sibling-app registry (`KNOWN_APPS`). Events publish as +/// `bread.paper.*`. See `EVENTS.md`. +const APP_ID: &str = "paper"; const IMAGE_EXTENSIONS: &[&str] = &["png", "jpg", "jpeg", "webp", "gif", "bmp"]; @@ -13,9 +18,19 @@ pub fn set(path: &Path) -> Result<()> { apply_wallpaper(&path)?; generate_palette(&path)?; reload_theme()?; + emit_changed(&path); Ok(()) } +/// Fire-and-forget `bread.paper.changed`. Silent no-op if breadd is down +/// (`BreadClient::emit` never blocks or errors the caller). +fn emit_changed(path: &Path) { + BreadClient::connect(APP_ID).emit( + "bread.paper.changed", + serde_json::json!({ "path": path.to_string_lossy() }), + ); +} + pub fn get() -> Result { let home = std::env::var("HOME").context("HOME not set")?; let wal_file = PathBuf::from(home).join(".cache/wal/wal"); @@ -59,3 +74,15 @@ fn validate(path: &Path) -> Result { Ok(canonical) } + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn emit_changed_is_silent_without_breadd() { + // BreadClient::emit must never panic or error just because the + // socket is missing — this is the fail-silent contract. + emit_changed(Path::new("/tmp/wallpaper.png")); + } +}