#!/bin/bash
# rustc calculates a unique metadata tag to mangle symbols which includes the
# actual path to the crate. This breaks our deterministic builds as we depend
# on a copy of rust-lightning via a path. We insert this shim between cargo and
# rustc and edit the metadata tag for rust-lightning.
# While we could just set RUSTFLAGS="-C metadata=42", this would break if we
# ever (indirectly) depend on multiple versions of the same crate.
args=("$@")
IS_LIGHTNING=false
for ((i=0; i<"${#args[@]}"; ++i)); do
    case ${args[i]} in
        --crate-name)
			if [ "${args[i+1]}" = "lightning" -o "${args[i+1]}" = "lightning_background_processor" -o "${args[i+1]}" = "lightning_invoice" -o "${args[i+1]}" = "lightning_persister" -o "${args[i+1]}" = "lightning_rapid_gossip_sync" -o "${args[i+1]}" = "ldk" ]; then
				IS_LIGHTNING=true
			fi
			;;
    esac
done
for ((i=0; i<"${#args[@]}"; ++i)); do
    case ${args[i]} in
        metadata*)
			if [ "$IS_LIGHTNING" = "true" ]; then
				# Pick any random value for metadata, it doesn't matter
				args[i]="metadata=42"
			fi
			;;
    esac
done

$LDK_RUSTC_PATH "${args[@]}"