_ Git - ldk-c-bindings/blob - deterministic-build-wrappers/rustc

   1 #!/bin/bash
   2 # rustc calculates a unique metadata tag to mangle symbols which includes the
   3 # actual path to the crate. This breaks our deterministic builds as we depend
   4 # on a copy of rust-lightning via a path. We insert this shim between cargo and
   5 # rustc and edit the metadata tag for rust-lightning.
   6 # While we could just set RUSTFLAGS="-C metadata=42", this would break if we
   7 # ever (indirectly) depend on multiple versions of the same crate.
   8 args=("$@")
   9 IS_LIGHTNING=false
  10 SKIP_EMBED_BITCODE=false
  11 for ((i=0; i<"${#args[@]}"; ++i)); do
  12     case ${args[i]} in
  13         --crate-name)
  14                         if [ "${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 "${args[i+1]}" = "lightning_transaction_sync" -o "${args[i+1]}" = "ldk" ]; then
  15                                 IS_LIGHTNING=true
  16                         fi
  17                         ;;
  18                 --crate-type)
  19                         if [ "${args[i+1]}" = "proc-macro" ]; then
  20                                 # If we're building a proc-macro, rustc incorrectly passes our RUSTFLAGS containing
  21                                 # embed-bitcode=yes, which we don't want.
  22                                 SKIP_EMBED_BITCODE=true
  23                         fi
  24                         ;;
  25     esac
  26 done
  27 for ((i=0; i<"${#args[@]}"; ++i)); do
  28     case ${args[i]} in
  29         metadata*)
  30                         if [ "$IS_LIGHTNING" = "true" ]; then
  31                                 # Pick any random value for metadata, it doesn't matter
  32                                 args[i]="metadata=42"
  33                         fi
  34                         ;;
  35                 embed-bitcode=yes)
  36                         if [ "$SKIP_EMBED_BITCODE" = "true" ]; then
  37                                 args[i]="embed-bitcode=no"
  38                         fi
  39                         ;;
  40                 lto)
  41                         if [ "$SKIP_EMBED_BITCODE" = "true" ]; then
  42                                 args[i]="lto=no"
  43                         fi
  44                         ;;
  45     esac
  46 done
  47 $LDK_RUSTC_PATH "${args[@]}"