From ab3970f37537cedd88a0c37dcf5c0b49d4695399 Mon Sep 17 00:00:00 2001
From: Matthew Fernandez <matthew.fernandez@gmail.com>
Date: Sat, 16 Apr 2022 08:39:32 -0700
Subject: [PATCH] =?utf8?q?CI:=20retry=20macOS=20libANN=20installation=20up?=
 =?utf8?q?=20to=202=C3=97=20on=20failure?=
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libANN availability seems erratic, with Macports sometimes reporting:

  Error: Port libANN not found

only for a retry of the job to succeed. This change introduces an auto-retry
loop on libANN’s installation, hoping this will ameliorate the issue.
---
 ci/macos-install-build-dependencies.sh   | 17 ++++++++++++++++-
 ci/macos-install-runtime-dependencies.sh | 17 ++++++++++++++++-
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/ci/macos-install-build-dependencies.sh b/ci/macos-install-build-dependencies.sh
index 91d5620d3..b6e4bbb8b 100644
--- a/ci/macos-install-build-dependencies.sh
+++ b/ci/macos-install-build-dependencies.sh
@@ -54,5 +54,20 @@ curl --retry 3 --location --no-progress-meter -O \
 sudo installer -package MacPorts-2.7.2-12-Monterey.pkg -target /
 export PATH=/opt/local/bin:${PATH}
 
+# `port install` with retry because packages sometimes transiently 404
+function port_install {
+  for i in 1 2 3; do
+    set +e
+    sudo port install "$@"
+    RET=$?
+    set -e
+    if [ ${RET} -eq 0 ]; then
+      return 0
+    fi
+    sleep $((10 * 2 ** (${i} - 1))) # exponential back off
+  done
+  return -1
+}
+
 # lib/mingle dependency
-sudo port install libANN
+port_install libANN
diff --git a/ci/macos-install-runtime-dependencies.sh b/ci/macos-install-runtime-dependencies.sh
index 0dc687f77..c6632f169 100644
--- a/ci/macos-install-runtime-dependencies.sh
+++ b/ci/macos-install-runtime-dependencies.sh
@@ -36,7 +36,22 @@ curl --retry 3 --location --no-progress-meter -O \
 sudo installer -package MacPorts-2.7.2-12-Monterey.pkg -target /
 export PATH=/opt/local/bin:${PATH}
 
+# `port install` with retry because packages sometimes transiently 404
+function port_install {
+  for i in 1 2 3; do
+    set +e
+    sudo port install "$@"
+    RET=$?
+    set -e
+    if [ ${RET} -eq 0 ]; then
+      return 0
+    fi
+    sleep $((10 * 2 ** (${i} - 1))) # exponential back off
+  done
+  return -1
+}
+
 # lib/mingle dependency
-sudo port install libANN
+port_install libANN
 
 python3 -m pip install --requirement requirements.txt
-- 
2.40.0