Collapse workspace to a single oc-rsync entrypoint

[oferchen]

Summary

• remove the legacy wrapper binaries and metadata so the workspace only builds oc-rsync
• update branding helpers, detection, and docs to reflect the single entrypoint while still accepting oc-rsyncd aliases
• refresh tooling and packaging scripts to match the new branding and configuration defaults

Testing

• cargo test --workspace --all-features

---

Codex Task

[chatgpt-codex-connector]

💡 Codex Review

rsync/crates/core/build.rs

Lines 1 to 40 in b2e9112

	use std::{
	env, fs,
	path::{Path, PathBuf},
	process::Command,
	};
	use toml::Table;
	fn main() {
	let manifest_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR"));
	println!("cargo:rerun-if-env-changed=CARGO_WORKSPACE_DIR");
	println!("cargo:rerun-if-env-changed=CARGO_MANIFEST_DIR");
	println!("cargo:rerun-if-env-changed=OC_RSYNC_BUILD_OVERRIDE");
	if let Some(git_dir) = git_directory(&manifest_dir) {
	emit_rerun_if_exists(&git_dir.join("HEAD"));
	emit_rerun_if_exists(&git_dir.join("refs/heads"));
	emit_rerun_if_exists(&git_dir.join("refs/remotes"));
	emit_rerun_if_exists(&git_dir.join("packed-refs"));
	}
	let workspace_root = workspace_root(&manifest_dir).unwrap_or_else(|| manifest_dir.clone());
	println!(
	"cargo:rustc-env=RSYNC_WORKSPACE_ROOT={}",
	workspace_root.display()
	);
	emit_rerun_if_exists(&workspace_root.join("Cargo.toml"));
	let metadata = load_workspace_metadata(&workspace_root);
	metadata.emit_cargo_env();
	let build_id = env::var("OC_RSYNC_BUILD_OVERRIDE")
	.ok()
	.map(|value| value.trim().to_owned())
	.filter(|value| !value.is_empty())
	.or_else(|| git_revision(&manifest_dir))
	.unwrap_or_else(|| "unknown".to_owned());

Restore build script that exports workspace metadata env vars

The commit deletes crates/core/build.rs, which previously populated OC_RSYNC_WORKSPACE_* via cargo:rustc-env. All constants in crates/core/src/workspace/constants.rs still read those variables through env!("OC_RSYNC_WORKSPACE_BRAND"), env!("OC_RSYNC_WORKSPACE_CLIENT_BIN"), etc. Without the build script, Cargo never defines these variables and the crate fails to compile with “environment variable … not defined” errors. Either keep emitting the env vars or switch the constants to hard-coded values pulled from the manifest at runtime so the workspace continues to build.

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