Describe how to install with testenvironment

system_setup/install.sh

@@ -14,7 +14,8 @@ SHRINK_MIB=4096
 OEMDRV_LABEL="OEMDRV"
 MOUNT_POINT="/opt/sys_config"
 MOUNT_OPTS="compress=zstd:6"
-REPO_URL="${1:-https://gitea.dtext.online/obel1x/fedora-OEMDRV.git}"
+REPO_URL="${REPO_URL:-https://gitea.dtext.online/obel1x/fedora-OEMDRV.git}"
+REPO_BRANCH="${REPO_BRANCH:-main}"
 MIN_FREE_MIB=$(( SHRINK_MIB + 512 ))   # require 512 MiB headroom above the shrink size
 
 # ── Helpers ───────────────────────────────────────────────────────────────────
@@ -69,7 +70,7 @@ check_repo_url() {
 
     tmpdir=$(mktemp -d /tmp/oemdrv_repocheck.XXXXXX)
 
-    if ! curl -fsSL "${REPO_URL%.git}/raw/branch/main/system_setup/install.sh" \
+    if ! curl -fsSL "${REPO_URL%.git}/raw/branch/${REPO_BRANCH}/system_setup/install.sh" \
               -o "$tmpdir/install.sh" 2>/dev/null; then
         rm -rf "$tmpdir"
         return 1
@@ -293,13 +294,13 @@ info "Verifying repository URL..."
 check_repo_url
 case $? in
     1) echo
-       echo "WARNING: '$REPO_URL' is not a reachable git repository."
+       echo "WARNING: '$REPO_URL' branch '${REPO_BRANCH}' is not a reachable git repository."
        read -r -p "  Continue anyway? [y/N]: " ans
        [[ "${ans,,}" == "y" ]] || { echo "Aborted."; exit 0; }
        ;;
     2) echo
        echo "WARNING: The checksum of this script does not match 'system_setup/install.sh'"
-       echo "         at '$REPO_URL'."
+       echo "         at '$REPO_URL' branch '${REPO_BRANCH}'."
        echo "         You may be running an outdated or modified version of install.sh."
        read -r -p "  Continue anyway? [y/N]: " ans
        [[ "${ans,,}" == "y" ]] || { echo "Aborted."; exit 0; }
@@ -496,7 +497,7 @@ mount -o "$MOUNT_OPTS" "$OEMDRV_DEV" "$MOUNT_POINT" || die "mount failed."
 
 info "Cloning $REPO_URL into $MOUNT_POINT..."
 cd "$MOUNT_POINT" || die "Cannot cd to $MOUNT_POINT."
-git clone --progress --depth 1 "$REPO_URL" . || die "git clone failed."
+git clone --progress --depth 1 -b $REPO_BRANCH "$REPO_URL" . || die "git clone failed."
 
 # Write hardware UUID to a user-readable per-machine file
 dmidecode -t system | grep -i 'UUID' \