From 878e967972bafc13f236ed7e474944f3428cb806 Mon Sep 17 00:00:00 2001
From: Taiki Endo <te316e89@gmail.com>
Date: Mon, 1 Aug 2022 17:40:32 +0900
Subject: [PATCH] Set PROTOC environment variable when installing protoc

---
 CHANGELOG.md | 2 ++
 main.sh      | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index febeb8d2..2dd7289f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Set the `PROTOC` environment variable when installing `protoc` if it has not already been set.
+
 ## [1.9.0] - 2022-08-01
 
 - Support `protoc`.
diff --git a/main.sh b/main.sh
index 918f0789..06c427b1 100755
--- a/main.sh
+++ b/main.sh
@@ -239,6 +239,14 @@ for tool in "${tools[@]}"; do
                 *) bail "unsupported OSTYPE '${OSTYPE}' for ${tool}" ;;
             esac
             download "${url}" /usr/local/bin "bin/protoc${exe}"
+            if [[ -z "${PROTOC:-}" ]]; then
+                info "setting PROTOC environment variable"
+                if [[ -d /usr/local/bin ]]; then
+                    echo "PROTOC=/usr/local/bin/protoc${exe}" >>"${GITHUB_ENV}"
+                else
+                    echo "PROTOC=${HOME}/.install-action/bin/protoc${exe}" >>"${GITHUB_ENV}"
+                fi
+            fi
             ;;
         shellcheck)
             # https://github.com/koalaman/shellcheck/releases