ci: Fix spurious errors while building iOS / Android examples

Run the build scripts through a shell script that checks the output
and retries if the error was a known spurious error.

Part-of: <https://gitlab.freedesktop.org/gstreamer/cerbero/-/merge_requests/1076>

1 files changed, 32 insertions, 0 deletions

diff --git a/ci/run_retry.sh b/ci/run_retry.sh
new file mode 100755
index 00000000..9105c9cc
--- /dev/null
+++ b/ci/run_retry.sh
@@ -0,0 +1,32 @@
+#!/bin/bash
+# vim: set sts=4 sw=4 et :
+
+set -o pipefail
+
+ERRORS=(
+    "Warning: An error occurred while preparing SDK package Android SDK Tools: Connection reset."
+    "The Xcode build system has crashed. Build again to continue."
+)
+RETRIES=3
+LOGFILE="/tmp/logfile.txt"
+
+while true; do
+    spurious_error=
+    "$@" | tee "$LOGFILE" 2>&1
+    ret=$?
+    [[ $ret == 0 ]] && break
+    while read line; do
+        for error in "${ERRORS[@]}"; do
+            if [[ $line =~ $error ]]; then
+                spurious_error=$line
+                break 2
+            fi
+        done
+    done < "$LOGFILE"
+    rm -f "$LOGFILE"
+    if [[ $spurious_error == '' ]] || [[ $RETRIES == 0 ]]; then
+        exit $ret
+    fi
+    RETRIES=$((RETRIES-1))
+    echo "Retrying, caught spurious failure: $spurious_error"
+done