Add github workflow for ci testing

.github/workflows/build.yml

@@ -0,0 +1,37 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+  workflow_dispatch:
+
+env:
+  UPSTASH_VECTOR_REST_URL: ${{ secrets.UPSTASH_VECTOR_REST_URL }}
+  UPSTASH_VECTOR_REST_TOKEN: ${{ secrets.UPSTASH_VECTOR_REST_TOKEN }}
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version-file: 'go.mod'
+          cache-dependency-path: 'go.sum'
+
+      - name: Install Go tools
+        run: go install honnef.co/go/tools/cmd/staticcheck@latest
+
+      - name: Build
+        run: make
+
+      - name: Test
+        run: make test

README.md

@@ -29,6 +29,25 @@ func main() {
 }
 ```
 
+Alternatively, you can set following environment variables:
+
+```shell
+UPSTASH_VECTOR_REST_URL="your_rest_url"
+UPSTASH_VECTOR_REST_TOKEN="your_rest_token"
+```
+
+and then create client by using:
+
+```go
+import (
+	"github.com/upstash/vector-go"
+)
+
+func main() {
+	client := vector.NewClientFromEnv()
+}
+```
+
 #### Using a custom HTTP client
 
 By default, `http.DefaultClient` will be used for doing requests. It is possible
@@ -190,4 +209,4 @@ err := client.Reset()
 
 ```go
 info, err := client.Info()
-```
+```

client.go

@@ -6,6 +6,12 @@ import (
 	"errors"
 	"io"
 	"net/http"
+	"os"
+)
+
+const (
+	UrlEnvProperty   = "UPSTASH_VECTOR_REST_URL"
+	TokenEnvProperty = "UPSTASH_VECTOR_REST_TOKEN"
 )
 
 type Options struct {
@@ -23,6 +29,12 @@ func (o *Options) init() {
 	if o.Client == nil {
 		o.Client = http.DefaultClient
 	}
+	if o.Url == "" {
+		panic("Missing Upstash Vector URL")
+	}
+	if o.Token == "" {
+		panic("Missing Upstash Vector Token")
+	}
 }
 
 // NewClient returns a client to be used with Upstash Vector
@@ -34,7 +46,16 @@ func NewClient(url string, token string) *Client {
 	})
 }
 
-// NewClient returns a client to be used with Upstash Vector
+// NewClientFromEnv returns a client to be used with Upstash Vector
+// by reading URL and token from the environment variables.
+func NewClientFromEnv() *Client {
+	return NewClientWith(Options{
+		Url:   os.Getenv(UrlEnvProperty),
+		Token: os.Getenv(TokenEnvProperty),
+	})
+}
+
+// NewClientWith returns a client to be used with Upstash Vector
 // with the given options.
 func NewClientWith(options Options) *Client {
 	options.init()

client_test.go

@@ -10,8 +10,8 @@ import (
 
 func newTestClient() (*Client, error) {
 	client := NewClient(
-		os.Getenv("UPSTASH_VECTOR_REST_URL"),
-		os.Getenv("UPSTASH_VECTOR_REST_TOKEN"),
+		os.Getenv(UrlEnvProperty),
+		os.Getenv(TokenEnvProperty),
 	)
 
 	err := client.Reset()
@@ -24,8 +24,8 @@ func newTestClient() (*Client, error) {
 
 func newTestClientWith(client *http.Client) (*Client, error) {
 	opts := Options{
-		Url:    os.Getenv("UPSTASH_VECTOR_REST_URL"),
-		Token:  os.Getenv("UPSTASH_VECTOR_REST_TOKEN"),
+		Url:    os.Getenv(UrlEnvProperty),
+		Token:  os.Getenv(TokenEnvProperty),
 		Client: client,
 	}