feat: add scripts to list Debian packages and Rust dependencies

Sponsored-by: author

2 files changed, 19 insertions, 5 deletions

diff --git a/README.md b/README.md
index 9681380..b9df5b3 100644
--- a/README.md
+++ b/README.md
@@ -12,9 +12,6 @@ There are three parts:
 * `debian-crate-packages` is a simple shell script that fetches the
   package list for the Debian "unstable" version, and produces a list
   of Rust crates and versions that have been packaged.
-* `rust-dependencies` is a shell script that reads the output of
-  `cargo tree` (possibly with options like `--all-features`) and
-  produces a list of crates and versions.
 * The Rust program in this crate reads the outputs of the two scripts
   and produces a list of missing crates or versions.
 
@@ -34,8 +31,7 @@ about dependencies:
 
 ```sh
 $ ./debian-crate-packages > crates-in-debian
-$ (cd /where/rust/program/is && cargo tree) | ./rust-dependencies > crates-wanted
-$ cargo run -q -- crates-in-debian crates-wanted
+$ (cd /where/rust/program/is && cargo tree) | cargo run -q -- crates-in-debian
 missing-version aho-corasick 0.7.18
 missing-entirely ansi_term
 ```
diff --git a/debian-crate-packages b/debian-crate-packages
new file mode 100755
index 0000000..c4c8a5a
--- /dev/null
+++ b/debian-crate-packages
@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -euo pipefail
+
+if [ ! -e Packages ]; then
+	curl -s http://deb.debian.org/debian/dists/unstable/main/binary-amd64/Packages.xz |
+		unxz >Packages
+fi
+grep-dctrl -s Package,Version librust- Packages |
+	awk '
+/^Package:/ {
+  name = $2
+  gsub(/^librust-/, "", name)
+  gsub(/-dev$/, "", name)
+  gsub(/-/, "_", name)
+}
+/^Version:/ { gsub(/-[^-]*$/, "", $2); print name, $2 }
+'