Cosmetic fixups in examples (#8325)

* test the examples in CI
* combine the two examples into a single one

(cherry picked from commit c9cc09f)

.circleci/config.yml

@@ -101,6 +101,9 @@ jobs:
     - run:
         when: always
         command: bash <(curl -s https://codecov.io/bash) -cF unittests -X search -f coverage/unit_tests.coverprofile
+    - run:
+        command: go test -v ./...
+        working_directory: ~/ipfs/go-ipfs/docs/examples/go-ipfs-as-a-library
 
     - run:
         when: always

docs/examples/go-ipfs-as-a-library/go.mod

@@ -1,14 +1,13 @@
 module github.com/ipfs/go-ipfs/examples/go-ipfs-as-a-library
 
-go 1.14
+go 1.15
 
 require (
-	github.com/ipfs/go-ipfs v0.7.0
+	github.com/ipfs/go-ipfs v0.9.1
 	github.com/ipfs/go-ipfs-config v0.14.0
 	github.com/ipfs/go-ipfs-files v0.0.8
 	github.com/ipfs/interface-go-ipfs-core v0.4.0
 	github.com/libp2p/go-libp2p-core v0.8.6
-	github.com/libp2p/go-libp2p-peerstore v0.2.8
 	github.com/multiformats/go-multiaddr v0.3.3
 )
 

docs/examples/go-ipfs-as-a-library/go.sum

@@ -423,8 +423,8 @@ github.com/ipfs/go-ipfs-files v0.0.8 h1:8o0oFJkJ8UkO/ABl8T6ac6tKF3+NIpj67aAB6Zpu
 github.com/ipfs/go-ipfs-files v0.0.8/go.mod h1:wiN/jSG8FKyk7N0WyctKSvq3ljIa2NNTiZB55kpTdOs=
 github.com/ipfs/go-ipfs-keystore v0.0.2 h1:Fa9xg9IFD1VbiZtrNLzsD0GuELVHUFXCWF64kCPfEXU=
 github.com/ipfs/go-ipfs-keystore v0.0.2/go.mod h1:H49tRmibOEs7gLMgbOsjC4dqh1u5e0R/SWuc2ScfgSo=
-github.com/ipfs/go-ipfs-pinner v0.1.1 h1:iJd1gwILGQJSZhhI0jn6yFOLg34Ua7fdKcB6mXp6k/M=
-github.com/ipfs/go-ipfs-pinner v0.1.1/go.mod h1:EzyyaWCWeZJ/he9cDBH6QrEkSuRqTRWMmCoyNkylTTg=
+github.com/ipfs/go-ipfs-pinner v0.1.2 h1:Ve9OBhL6eg5+tVqEnIhPZOCXDtMjB+OhOohVZxPUxms=
+github.com/ipfs/go-ipfs-pinner v0.1.2/go.mod h1:/u9kMe+TyQybN21O5OBicdyx3x93lVI77PCtiTnArUk=
 github.com/ipfs/go-ipfs-posinfo v0.0.1 h1:Esoxj+1JgSjX0+ylc0hUmJCOv6V2vFoZiETLR6OtpRs=
 github.com/ipfs/go-ipfs-posinfo v0.0.1/go.mod h1:SwyeVP+jCwiDu0C313l/8jg6ZxM0qqtlt2a0vILTc1A=
 github.com/ipfs/go-ipfs-pq v0.0.1/go.mod h1:LWIqQpqfRG3fNc5XsnIhz/wQ2XXGyugQwls7BgUmUfY=

docs/examples/go-ipfs-as-a-library/main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"flag"
 	"fmt"
 	"io/ioutil"
 	"log"
@@ -57,6 +58,24 @@ func createTempRepo() (string, error) {
 		return "", err
 	}
 
+	// When creating the repository, you can define custom settings on the repository, such as enabling experimental
+	// features (See experimental-features.md) or customizing the gateway endpoint.
+	// To do such things, you should modify the variable `cfg`. For example:
+	if *flagExp {
+		// https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#ipfs-filestore
+		cfg.Experimental.FilestoreEnabled = true
+		// https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#ipfs-urlstore
+		cfg.Experimental.UrlstoreEnabled = true
+		// https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#directory-sharding--hamt
+		cfg.Experimental.ShardingEnabled = true
+		// https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#ipfs-p2p
+		cfg.Experimental.Libp2pStreamMounting = true
+		// https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#p2p-http-proxy
+		cfg.Experimental.P2pHttpProxy = true
+		// https://github.com/ipfs/go-ipfs/blob/master/docs/experimental-features.md#strategic-providing
+		cfg.Experimental.StrategicProviding = true
+	}
+
 	// Create the repo with the config
 	err = fsrepo.Init(repoPath, cfg)
 	if err != nil {
@@ -198,7 +217,11 @@ func getUnixfsNode(path string) (files.Node, error) {
 
 /// -------
 
+var flagExp = flag.Bool("experimental", false, "enable experimental features")
+
 func main() {
+	flag.Parse()
+
 	/// --- Part I: Getting a IPFS node running
 
 	fmt.Println("-- Getting an IPFS node running -- ")
@@ -228,7 +251,7 @@ func main() {
 
 	fmt.Println("\n-- Adding and getting back files & directories --")
 
-	inputBasePath := "./example-folder/"
+	inputBasePath := "../example-folder/"
 	inputPathFile := inputBasePath + "ipfs.paper.draft3.pdf"
 	inputPathDirectory := inputBasePath + "test-dir"
 
@@ -258,7 +281,11 @@ func main() {
 
 	/// --- Part III: Getting the file and directory you added back
 
-	outputBasePath := "./example-folder/"
+	outputBasePath, err := ioutil.TempDir("", "example")
+	if err != nil {
+		panic(fmt.Errorf("could not create output dir (%v)", err))
+	}
+	fmt.Printf("output folder: %s\n", outputBasePath)
 	outputPathFile := outputBasePath + strings.Split(cidFile.String(), "/")[2]
 	outputPathDirectory := outputBasePath + strings.Split(cidDirectory.String(), "/")[2]
 

docs/examples/go-ipfs-as-a-library/main_test.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"os/exec"
+	"strings"
+	"testing"
+)
+
+func TestExample(t *testing.T) {
+	out, err := exec.Command("go", "run", "main.go").Output()
+	if err != nil {
+		t.Fatalf("running example (%v)", err)
+	}
+	if !strings.Contains(string(out), "All done!") {
+		t.Errorf("example did not run successfully")
+	}
+}