From 92e266d22fbce193c7c76e286d807f37e1898767 Mon Sep 17 00:00:00 2001
From: Ivan Huang <ivan@riversense.tw>
Date: Fri, 30 May 2025 02:08:00 +0800
Subject: [PATCH 1/2] Add shell script parameters to support build for
 different architectures or operating systems.

---
 build.sh | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/build.sh b/build.sh
index 66175e53..7d821012 100755
--- a/build.sh
+++ b/build.sh
@@ -1,6 +1,38 @@
 #!/bin/sh
 
+usage() {
+cat << EOF
+Usage: ./build.sh [-a <386|amd64|arm|arm64>] [-o <linux|darwin|windows>]
+Build migration-verifier for mongosync.
+
+-a          Specify the target architecture for the build, if not specified, it will use the current architecture.
+-o          Specify the target operating system for the build, if not specified, it will use the current OS.
+-h          Display this help message.
+EOF
+exit 1;
+}
+
+while getopts "o:a:" option; do
+    case "$option" in
+        a)
+            arch=${OPTARG}
+            test "$arch" = "386" -o "$arch" = amd64 -o "$arch" = "arm" -o "$arch" = "arm64" || usage
+            ;;
+        o)
+            os=${OPTARG}
+            test "$os" = "linux" -o "$os" = "darwin" -o "$os" = "windows" || usage
+            ;;
+        h)
+            usage
+            ;;
+        *)
+            usage
+            ;;
+    esac
+done
+shift $((OPTIND-1))
+
 commit=$(git show --no-patch --format='%H')
 buildTime=$(date -u)
 
-go build -ldflags="-X 'main.Revision=$commit' -X 'main.BuildTime=$buildTime'" main/migration_verifier.go
+GOARCH=${arch:=$(go env GOARCH)} GOOS=${os:=$(go env GOOS)} go build -ldflags="-X 'main.Revision=$commit' -X 'main.BuildTime=$buildTime'" main/migration_verifier.go

From 0489788f15985c4534d154301627e0ac7213b537 Mon Sep 17 00:00:00 2001
From: Ivan Huang <ivan@riversense.tw>
Date: Fri, 30 May 2025 02:15:22 +0800
Subject: [PATCH 2/2] Using -h parameter should not be treated as an illegal
 option.

---
 build.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build.sh b/build.sh
index 7d821012..767b9fc2 100755
--- a/build.sh
+++ b/build.sh
@@ -12,7 +12,7 @@ EOF
 exit 1;
 }
 
-while getopts "o:a:" option; do
+while getopts "o:a:h" option; do
     case "$option" in
         a)
             arch=${OPTARG}