From 0c328d02c1546537478ffc575eed128e69fce84a Mon Sep 17 00:00:00 2001
From: Yifan Hong <elsk@google.com>
Date: Tue, 28 Apr 2020 13:31:11 -0700
Subject: Add add_slot_suffix function.

This function appends androidboot.slot_suffix to the
value of the argument.

Test: apply update
Bug: 153581609
Change-Id: I28a4047b5f2051acc039084f65a71deb492d9dcb
(cherry picked from commit dff80042750992ed635056cd9719481a14f93007)
Merged-In: I28a4047b5f2051acc039084f65a71deb492d9dcb
---
 updater/install.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'updater/install.cpp')

diff --git a/updater/install.cpp b/updater/install.cpp
index 7608dc3cd..afa5195d0 100644
--- a/updater/install.cpp
+++ b/updater/install.cpp
@@ -852,6 +852,20 @@ Value* Tune2FsFn(const char* name, State* state, const std::vector<std::unique_p
   return StringValue("t");
 }
 
+Value* AddSlotSuffixFn(const char* name, State* state,
+                       const std::vector<std::unique_ptr<Expr>>& argv) {
+  if (argv.size() != 1) {
+    return ErrorAbort(state, kArgsParsingFailure, "%s() expects 1 arg, got %zu", name, argv.size());
+  }
+  std::vector<std::string> args;
+  if (!ReadArgs(state, argv, &args)) {
+    return ErrorAbort(state, kArgsParsingFailure, "%s() Failed to parse the argument(s)", name);
+  }
+  const std::string& arg = args[0];
+  auto updater_runtime = state->updater->GetRuntime();
+  return StringValue(updater_runtime->AddSlotSuffix(arg));
+}
+
 void RegisterInstallFunctions() {
   RegisterFunction("mount", MountFn);
   RegisterFunction("is_mounted", IsMountedFn);
@@ -885,4 +899,6 @@ void RegisterInstallFunctions() {
 
   RegisterFunction("enable_reboot", EnableRebootFn);
   RegisterFunction("tune2fs", Tune2FsFn);
+
+  RegisterFunction("add_slot_suffix", AddSlotSuffixFn);
 }
-- 
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