feat: add installer script for linux/macOS (#270)

* feat: add installer script for linux/macOS

* remove -e flag from script

README.md

@@ -122,7 +122,13 @@ scoop bucket add j178 https://github.com/j178/scoop-bucket.git
 scoop install j178/leetgo
 ```
 
-### Install via go
+### Install via installer script on macOS/Linux
+
+```shell
+curl -fsSL https://raw.githubusercontent.com/j178/leetgo/master/scripts/install.sh | bash
+```
+
+### Install from source via `go install`
 
 ```shell
 go install github.com/j178/leetgo@latest

README_zh.md

@@ -120,7 +120,13 @@ scoop bucket add j178 https://github.com/j178/scoop-bucket.git
 scoop install j178/leetgo
 ```
 
-### 使用 `go install`
+### macOS/Linux 使用脚本安装
+
+```shell
+curl -fsSL https://raw.githubusercontent.com/j178/leetgo/master/scripts/install.sh | bash
+```
+
+### 使用 `go install` 从源码安装
 
 ```shell
 go install github.com/j178/leetgo@latest

leetcode/qid.go

@@ -73,15 +73,15 @@ func ParseQID(qid string, c Client) ([]*QuestionData, error) {
 			return nil, err
 		}
 	}
-	if err == ErrQuestionNotFound {
+	if errors.Is(err, ErrQuestionNotFound) {
 		err = nil
 	}
 	if err != nil {
 		return nil, fmt.Errorf("invalid qid: %w", err)
 	}
 	if q == nil && len(qs) == 0 {
 		q, err = QuestionBySlug(qid, c)
-		if err == ErrQuestionNotFound {
+		if errors.Is(err, ErrQuestionNotFound) {
 			q, err = QuestionFromCacheByID(qid, c)
 		}
 		if err != nil {

scripts/install.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Most of this script is taken from https://github.com/mitsuhiko/rye/blob/main/scripts/install.sh
+
+# Wrap everything in a function so that a truncated script
+# does not have the chance to cause issues.
+__wrap__() {
+
+# allow overriding the version
+VERSION=${LEETGO_VERSION:-latest}
+PREFIX=${LEETGO_PREFIX:-${HOME}/.local}
+
+REPO=j178/leetgo
+PLATFORM=`uname -s`
+ARCH=`uname -m`
+
+if [[ $PLATFORM == "Darwin" ]]; then
+  PLATFORM="macOS"
+elif [[ $PLATFORM == "Linux" ]]; then
+  PLATFORM="linux"
+fi
+
+if [[ $ARCH == armv8* ]] || [[ $ARCH == arm64* ]] || [[ $ARCH == aarch64* ]]; then
+  ARCH="arm64"
+elif [[ $ARCH == i686* ]]; then
+  ARCH="x86_64"
+fi
+
+BINARY="leetgo_${PLATFORM}_${ARCH}"
+
+# Oddly enough GitHub has different URLs for latest vs specific version
+if [[ $VERSION == "latest" ]]; then
+  DOWNLOAD_URL=https://github.com/${REPO}/releases/latest/download/${BINARY}.tar.gz
+else
+  DOWNLOAD_URL=https://github.com/${REPO}/releases/download/${VERSION}/${BINARY}.tar.gz
+fi
+
+echo "This script will automatically download and install leetgo (${VERSION}) for you."
+if [ "x$(id -u)" == "x0" ]; then
+  echo "warning: this script is running as root.  This is dangerous and unnecessary!"
+fi
+
+if ! hash curl 2> /dev/null; then
+  echo "error: you do not have 'curl' installed which is required for this script."
+  exit 1
+fi
+
+if ! hash tar 2> /dev/null; then
+  echo "error: you do not have 'tar' installed which is required for this script."
+  exit 1
+fi
+
+TEMP_INSTALL_DIR=`mktemp "${TMPDIR:-/tmp/}.leetgoinstall.XXXXXXXX"`
+TEMP_FILE_GZ="${TEMP_INSTALL_DIR}.tar.gz"
+
+rm -rf "$TEMP_INSTALL_DIR"
+mkdir -p "$TEMP_INSTALL_DIR"
+
+cleanup() {
+  rm -rf "$TEMP_INSTALL_DIR"
+  rm -f "$TEMP_FILE_GZ"
+}
+
+trap cleanup EXIT
+echo "Downloading $DOWNLOAD_URL"
+HTTP_CODE=$(curl -SL --progress-bar "$DOWNLOAD_URL" --output "$TEMP_FILE_GZ" --write-out "%{http_code}")
+if [[ ${HTTP_CODE} -lt 200 || ${HTTP_CODE} -gt 299 ]]; then
+  echo "error: platform ${PLATFORM} (${ARCH}) is unsupported."
+  exit 1
+fi
+
+tar -xzf "$TEMP_FILE_GZ" -C "$TEMP_INSTALL_DIR"
+
+DEST="$PREFIX/bin/leetgo"
+
+# Continue?
+echo "leetgo will be installed into '$DEST'."
+echo -n "Continue? (y/n) "
+read -r yn
+case $yn in
+  [Yy]* ) ;;
+  * ) exit;;
+esac
+
+chmod +x "$TEMP_INSTALL_DIR/leetgo"
+mv "$TEMP_INSTALL_DIR/leetgo" "$DEST"
+
+}; __wrap__