From 1ced32231079c46344f4a490c5cb3de053acfeca Mon Sep 17 00:00:00 2001
From: Steven Allen <steven@stebalien.com>
Date: Wed, 22 Jun 2022 10:42:41 -0700
Subject: [PATCH] feat: support overriding actor versions per-network

---
 build/actors/README.md |  8 ++++++++
 build/actors/pack.sh   | 28 ++++++++++++++++++++++------
 2 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/build/actors/README.md b/build/actors/README.md
index 097959f4f..981ad726a 100644
--- a/build/actors/README.md
+++ b/build/actors/README.md
@@ -16,3 +16,11 @@ This will:
 
 1. Download the actors bundles and pack them into the appropriate tarfile (`$VERSION.tar.zst`).
 2. Run `make bundle-gen` in the top-level directory to regenerate the bundle metadata file for _all_ network versions (all `*.tar.zst` files in this directory).
+
+## Overriding
+
+To build a bundle, but specify a different release/tag for a specific network, append `$network=$alternative_release` on the command line. For example:
+
+```bash
+./pack.sh v8 dev/20220602 mainnet=v8.0.0 calibrationnet=v8.0.0-rc.1
+```
diff --git a/build/actors/pack.sh b/build/actors/pack.sh
index acde5d769..c2060e67c 100755
--- a/build/actors/pack.sh
+++ b/build/actors/pack.sh
@@ -1,25 +1,42 @@
 #!/bin/bash
 
+NETWORKS=(devnet mainnet caterpillarnet butterflynet testing testing-fake-proofs calibrationnet)
+
 set -e
 
-if [[ $# -ne 2 ]]; then
-    echo "expected two arguments, an actors version (e.g., v8) and an actors release"
+if [[ $# -lt 2 ]]; then
+    echo "Usage: $0 VERSION RELEASE [NETWORK=RELEASE_OVERRIDE]..." >&2
+    echo "expected at least two arguments, an actors version (e.g., v8), an actors release, and any number of release overrides." >&2
     exit 1
 fi
 
 VERSION="$1" # actors version
 RELEASE="$2" # actors release name
-NETWORKS=(devnet mainnet caterpillarnet butterflynet testing testing-fake-proofs calibrationnet)
+RELEASE_OVERRIDES=("${@:3}")
 
-echo "Downloading bundles for actors version ${VERSION}, release ${RELEASE}"
+echo "Downloading bundles for actors version ${VERSION} release ${RELEASE}"
+echo "With release overrides ${RELEASE_OVERRIDES[*]}"
 
 TARGET_FILE="$(pwd)/${VERSION}.tar.zst"
 WORKDIR=$(mktemp -d -t "actor-bundles-${VERSION}.XXXXXXXXXX")
 trap 'rm -rf -- "$WORKDIR"' EXIT
 
+encode_release() {
+    jq -rn --arg release "$1" '$release | @uri'
+}
+
 pushd "${WORKDIR}"
-encoded_release="$(jq -rn --arg release "$RELEASE" '$release | @uri')"
 for network in "${NETWORKS[@]}"; do
+    release="$RELEASE"
+    # Ideally, we'd use an associative array (map). But that's not supported on macos.
+    for override in "${RELEASE_OVERRIDES[@]}"; do
+        if [[ "${network}" = "${override%%=*}" ]]; then
+            release="${override#*=}"
+            break
+        fi
+    done
+    encoded_release="$(encode_release "$release")"
+    echo "Downloading $release for network $network."
     wget "https://github.com/filecoin-project/builtin-actors/releases/download/${encoded_release}/builtin-actors-${network}"{.car,.sha256}
 done
 
@@ -27,7 +44,6 @@ echo "Checking the checksums..."
 
 sha256sum -c -- *.sha256
 
-
 echo "Packing..."
 
 rm -f -- "$TARGET_FILE"