From 2df4fc955928e4be6d52c537e34a544e4f9f8d13 Mon Sep 17 00:00:00 2001
From: Colin Walters <walters@verbum.org>
Date: Tue, 20 Aug 2024 14:10:48 -0400
Subject: [PATCH] rust: Attempt to fix build on docs.rs

Copy over the pattern we have in ostree to add a feature that
disables our build script (which pulls in a requirement on the
libcomposefs C library, which doesn't exist in the docs.rs build env)
when we detect we're being built on docs.rs.

Signed-off-by: Colin Walters <walters@verbum.org>
---
 rust/composefs-sys/Cargo.toml | 4 ++++
 rust/composefs-sys/build.rs   | 1 +
 rust/composefs/Cargo.toml     | 1 +
 3 files changed, 6 insertions(+)

diff --git a/rust/composefs-sys/Cargo.toml b/rust/composefs-sys/Cargo.toml
index bda05ecf..82c7653b 100644
--- a/rust/composefs-sys/Cargo.toml
+++ b/rust/composefs-sys/Cargo.toml
@@ -9,11 +9,15 @@ build = "build.rs"
 license = "MIT OR Apache-2.0"
 readme = "README.md"
 
+[package.metadata.docs.rs]
+features = ["dox"]
+
 [package.metadata.system-deps.composefs]
 name = "composefs"
 version = "1"
 
 [features]
+dox = []
 # Depend on 1.0.4 APIs
 v1_0_4 = []
 
diff --git a/rust/composefs-sys/build.rs b/rust/composefs-sys/build.rs
index d66b1a5a..54331fb7 100644
--- a/rust/composefs-sys/build.rs
+++ b/rust/composefs-sys/build.rs
@@ -1,4 +1,5 @@
 fn main() {
+    #[cfg(not(feature = "dox"))]
     if let Err(s) = system_deps::Config::new().probe() {
         println!("cargo:warning={s}");
         std::process::exit(1);
diff --git a/rust/composefs/Cargo.toml b/rust/composefs/Cargo.toml
index fdf3fbf5..64c1fba9 100644
--- a/rust/composefs/Cargo.toml
+++ b/rust/composefs/Cargo.toml
@@ -14,6 +14,7 @@ name = "composefs"
 path = "src/lib.rs"
 
 [features]
+dox = ["composefs-sys/dox"]
 # Depend on 1.0.4 APIs
 v1_0_4 = ["composefs-sys/v1_0_4"]