From f4e2b139e9e33fd970189c345564713f4f9b80a4 Mon Sep 17 00:00:00 2001
From: Fabio Valentini <decathorpe@gmail.com>
Date: Sep 22 2023 13:41:57 +0000
Subject: Add cargo_vendor_manifest macro and and a _cargo_vendor generator


The %cargo_vendor_manifest macro can be used to generate a file that
lists the contents of vendor directories / tarballs generated by
"cargo vendor", and this manifest file can then be installed to be
consumed by the _cargo_vendor generator to produce correct virtual
Provides for bundled Rust crates.

---

diff --git a/fileattrs/cargo_vendor.attr b/fileattrs/cargo_vendor.attr
new file mode 100644
index 0000000..e9dc933
--- /dev/null
+++ b/fileattrs/cargo_vendor.attr
@@ -0,0 +1,2 @@
+%__cargo_vendor_provides /usr/bin/cargo2rpm parse-vendor-manifest
+%__cargo_vendor_path     ^%{_defaultlicensedir}(/[^/]+)+/cargo-vendor.txt$
diff --git a/macros.d/macros.cargo b/macros.d/macros.cargo
index 8adb9fa..c283647 100644
--- a/macros.d/macros.cargo
+++ b/macros.d/macros.cargo
@@ -215,3 +215,25 @@ fi                                                                  \
     | sort -u                                                       \
 }
 
+# cargo_vendor_manifest: write list of vendored crates and their versions
+#
+# The arguments for the internal "cargo tree" call emulate the logic
+# that determines which crates are included when running "cargo vendor".
+# The results are written to "cargo-vendor.txt".
+%cargo_vendor_manifest()\
+%{shrink:\
+    %{__cargo} tree                                                 \
+    --workspace                                                     \
+    --offline                                                       \
+    --edges normal,build,dev                                        \
+    --no-dedupe                                                     \
+    --target all                                                    \
+    --all-features                                                  \
+    --prefix none                                                   \
+    --format "{p}"                                                  \
+    | grep -v "$(pwd)"                                              \
+    | sed -e "s: (proc-macro)::"                                    \
+    | sort -u                                                       \
+    > cargo-vendor.txt                                              \
+}
+