From a76f7421070cc2cdaab33815ad16130497bef751 Mon Sep 17 00:00:00 2001
From: William Banfield <wbanfield@gmail.com>
Date: Tue, 6 Dec 2022 12:44:43 -0500
Subject: [PATCH] e2e: add script to generate multiversion-tests

---
 .github/workflows/e2e-manual.yml       |  2 +-
 .github/workflows/e2e-nightly-34x.yml  |  2 +-
 .github/workflows/e2e-nightly-37x.yml  |  2 +-
 .github/workflows/e2e-nightly-main.yml |  2 +-
 test/e2e/generate-multiversion.sh      | 26 ++++++++++++++++++++++++++
 5 files changed, 30 insertions(+), 4 deletions(-)
 create mode 100755 test/e2e/generate-multiversion.sh

diff --git a/.github/workflows/e2e-manual.yml b/.github/workflows/e2e-manual.yml
index c0eade4bd..bec0c73dc 100644
--- a/.github/workflows/e2e-manual.yml
+++ b/.github/workflows/e2e-manual.yml
@@ -29,7 +29,7 @@ jobs:
       - name: Generate testnets
         working-directory: test/e2e
         # When changing -g, also change the matrix groups above
-        run: ./build/generator -g 5 -d networks/nightly/
+        run: ./generate-multiversion.sh -g 5 -d networks/nightly/
 
       - name: Run ${{ matrix.p2p }} p2p testnets
         working-directory: test/e2e
diff --git a/.github/workflows/e2e-nightly-34x.yml b/.github/workflows/e2e-nightly-34x.yml
index 8d89a20da..b618e9bcc 100644
--- a/.github/workflows/e2e-nightly-34x.yml
+++ b/.github/workflows/e2e-nightly-34x.yml
@@ -40,7 +40,7 @@ jobs:
       - name: Generate testnets
         working-directory: test/e2e
         # When changing -g, also change the matrix groups above
-        run: ./build/generator -g 2 -d networks/nightly
+        run: ./generate-multiversion.sh -g 2 -d networks/nightly
 
       - name: Run testnets in group ${{ matrix.group }}
         working-directory: test/e2e
diff --git a/.github/workflows/e2e-nightly-37x.yml b/.github/workflows/e2e-nightly-37x.yml
index ebcc4a3fb..fc2d36ff8 100644
--- a/.github/workflows/e2e-nightly-37x.yml
+++ b/.github/workflows/e2e-nightly-37x.yml
@@ -40,7 +40,7 @@ jobs:
       - name: Generate testnets
         working-directory: test/e2e
         # When changing -g, also change the matrix groups above
-        run: ./build/generator -g 5 -d networks/nightly/
+        run: ./generate-multiversion.sh -g 5 -d networks/nightly/
 
       - name: Run ${{ matrix.p2p }} p2p testnets
         working-directory: test/e2e
diff --git a/.github/workflows/e2e-nightly-main.yml b/.github/workflows/e2e-nightly-main.yml
index 7f734367d..850dda672 100644
--- a/.github/workflows/e2e-nightly-main.yml
+++ b/.github/workflows/e2e-nightly-main.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Generate testnets
         working-directory: test/e2e
         # When changing -g, also change the matrix groups above
-        run: ./build/generator -g 5 -d networks/nightly/
+        run: ./generate-multiversion.sh -g 5 -d networks/nightly/
 
       - name: Run ${{ matrix.p2p }} p2p testnets
         working-directory: test/e2e
diff --git a/test/e2e/generate-multiversion.sh b/test/e2e/generate-multiversion.sh
new file mode 100755
index 000000000..48a8cf860
--- /dev/null
+++ b/test/e2e/generate-multiversion.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+set -euo pipefail
+
+ARGS=$@
+FLAGS=${ARGS:=-g 4 -d networks/nightly}
+
+# This lists all tags that are reachable from the current commit, sorted by
+# increasing semver version.
+SORTED_TAGS=`git tag -l --merge HEAD  --sort="v:refname"`
+
+# Extracts the major and minor version of the most recent -dev tagged version.
+# For example, on the backport branch for v0.32, the most recent dev tag will contain v0.32.0-dev.
+# v0.32 is then extracted from this tag.
+BRANCH_MINOR_VERSION=`echo "$SORTED_TAGS" | grep '^v[0-9]\+\.[0-9]\+\.[0-9]\+\(-dev[0-9]*\)$' | tail -n 1 | sed -n 's/^\(v[0-9]\+\.[0-9]\+\).*/\1/p'`
+LATEST_RELEASE_VERSION=`echo "$SORTED_TAGS" | grep  '^v[0-9]\+\.[0-9]\+\.[0-9]\+$' | tail -n 1`
+
+# Check to see if the major and minor version of the latest release version are
+# the same as those of the current branch. This ensures that the multi-version testing
+# is only run on branches with a tagged release of the same major and minor version
+# and not on branches that do not yet have releases such as new backport branches
+# and the main branch.
+if [ `echo "$LATEST_RELEASE_VERSION" | grep "^$BRANCH_MINOR_VERSION"` ]; then
+	FLAGS="$FLAGS --multi-version $LATEST_RELEASE_VERSION"
+fi
+
+./build/generator $FLAGS