From e79bddb19f770523d66e51a152923e1f2344c04d Mon Sep 17 00:00:00 2001
From: Yujia Qiao <rapiz3142@gmail.com>
Date: Mon, 1 Nov 2021 09:35:05 +0800
Subject: [PATCH] feat: Support installation on arch (#5350)

---
 docs/en/latest/install-dependencies.md |  4 +++-
 docs/zh/latest/install-dependencies.md |  4 +++-
 utils/install-dependencies.sh          | 25 +++++++++++++++++++++++++
 3 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/docs/en/latest/install-dependencies.md b/docs/en/latest/install-dependencies.md
index eb806879..048e580b 100644
--- a/docs/en/latest/install-dependencies.md
+++ b/docs/en/latest/install-dependencies.md
@@ -44,7 +44,9 @@ title: Install Dependencies
 
 Run the following command to install Apache APISIX's dependencies on a supported operating system.
 
-Supported OS versions: CentOS7, Fedora31 & 32, Ubuntu 16.04 & 18.04, Debian 9 & 10, Mac OSX
+Supported OS versions: CentOS7, Fedora31 & 32, Ubuntu 16.04 & 18.04, Debian 9 & 10, Arch Linux, Mac OSX
+
+Note that in the case of Arch Linux, we use `openresty` from the AUR, thus requiring a AUR helper. For now `yay` and `pacaur` are supported.
 
 ```
 curl https://raw.githubusercontent.com/apache/apisix/master/utils/install-dependencies.sh -sL | bash -
diff --git a/docs/zh/latest/install-dependencies.md b/docs/zh/latest/install-dependencies.md
index 07d27cef..1d97dc97 100644
--- a/docs/zh/latest/install-dependencies.md
+++ b/docs/zh/latest/install-dependencies.md
@@ -44,7 +44,9 @@ title: 安装依赖
 
 在支持的操作系统上运行以下指令即可安装 Apache APISIX dependencies。
 
-支持的操作系统版本: CentOS 7, Fedora 31 & 32, Ubuntu 16.04 & 18.04, Debian 9 & 10, Mac OSX。
+支持的操作系统版本: CentOS 7, Fedora 31 & 32, Ubuntu 16.04 & 18.04, Debian 9 & 10, Arch Linux, Mac OSX。
+
+注意，对于 Arch Linux 来说，我们使用 AUR 源中的 `openresty`，所以需要 AUR Helper 才能正常安装。目前支持 `yay` 和 `pacaur`。
 
 ```
 curl https://raw.githubusercontent.com/apache/apisix/master/utils/install-dependencies.sh -sL | bash -
diff --git a/utils/install-dependencies.sh b/utils/install-dependencies.sh
index 19a7e338..e7cc5da0 100755
--- a/utils/install-dependencies.sh
+++ b/utils/install-dependencies.sh
@@ -19,6 +19,29 @@
 
 set -ex
 
+function detect_aur_helper() {
+    if [[ $(which yay) ]]; then
+        AUR_HELPER=yay
+    elif [[ $(which pacaur) ]]; then
+        AUR_HELPER=pacaur
+    else
+        echo No available AUR helpers found. Please specify your AUR helper by AUR_HELPER.
+        exit -1
+    fi
+}
+
+function install_dependencies_with_aur() {
+    detect_aur_helper
+    $AUR_HELPER -S openresty --noconfirm
+    sudo pacman -S openssl --noconfirm
+
+    export OPENRESTY_PREFIX=/opt/openresty
+
+    sudo mkdir $OPENRESTY_PREFIX/openssl
+    sudo ln -s /usr/include $OPENRESTY_PREFIX/openssl/include
+    sudo ln -s /usr/lib $OPENRESTY_PREFIX/openssl/lib
+}
+
 # Install dependencies on centos and fedora
 function install_dependencies_with_yum() {
     # add OpenResty source
@@ -66,6 +89,8 @@ function multi_distro_installation() {
         install_dependencies_with_apt "debian"
     elif grep -Eqi "Ubuntu" /etc/issue || grep -Eq "Ubuntu" /etc/*-release; then
         install_dependencies_with_apt "ubuntu"
+    elif grep -Eqi "Arch" /etc/issue || grep -Eq "Arch" /etc/*-release; then
+        install_dependencies_with_aur
     else
         echo "Non-supported operating system version"
     fi