1 files changed, 56 insertions, 0 deletions
diff --git a/scripts/why-depends b/scripts/why-depends
new file mode 100755
index 00000000..ae1ac6f7
--- /dev/null
+++ b/scripts/why-depends
@@ -0,0 +1,56 @@
+#! /usr/bin/env sh
+
+main() {
+    use_running="$1"
+    host="$2"
+    package="$3"
+
+    if [ "$use_running" = "true" ]; then
+        base="/run/current-system"
+    else
+        base=".#nixosConfigurations.$host.config.system.build.toplevel"
+    fi
+
+    fd "[a-zA-Z0-9]{32}-$package" /nix/store --type directory --threads 1 --exec nix --option warn-dirty false why-depends "$base"
+}
+
+running=false
+host="$(hostname)"
+packages=""
+direct_packages=""
+
+while [ "$#" -ne 0 ]; do
+    case "$1" in
+    "--running")
+        running=true
+        ;;
+    "--host")
+        shift 1
+        host="$1"
+        ;;
+    "--direct")
+        shift 1
+        direct_packages="$direct_packages $1"
+        ;;
+    *)
+        # Treat everything else as a package to check
+        packages="$packages $1"
+        ;;
+    esac
+
+    shift 1
+done
+
+if [ -n "$packages" ]; then
+    for package in $packages; do
+        main "$running" "$host" "$package-"
+    done
+fi
+
+if [ -n "$direct_packages" ]; then
+    for package in $direct_packages; do
+        main "$running" "$host" "$package-[0-9]"
+    done
+fi
+
+# vim: ft=sh