first prototype

Dockerfile

@@ -1,8 +1,10 @@
-FROM alpine:3.6 as alpine
+FROM alpine:3.14.1 as alpine
+
 RUN apk add -U --no-cache ca-certificates
 
-FROM alpine:3.6
+FROM alpine:3.14.1
 EXPOSE 3000
+LABEL maintainer="dockerhub@enderware.de"
 
 ENV GODEBUG netdns=go
 

README.md

@@ -1,4 +1,6 @@
-A config extension to Server to deliver drone files for repositories where you can't put a drone file in. _Please note this project requires Drone server version 1.4 or higher._
+A config extension to Server to deliver drone files for repositories where you can't put a drone file in.
+
+_Please note this project requires Drone server version 1.4 or higher._
 
 ## Installation
 
@@ -29,7 +31,9 @@ DRONE_YAML_SECRET=bea26a2221fd8090ea38720fc445eca6
 
 ## Testing
 
-Use the command line tools to test your extension. _This extension uses http-signatures to authorize client access and will reject unverified requests. You will be unable to test this extension using a simple curl command._
+Use the command line tools to test your extension.
+
+_This extension uses http-signatures to authorize client access and will reject unverified requests. You will be unable to test this extension using a simple curl command._
 
 ```text
 export DRONE_YAML_ENDPOINT=http://1.2.3.4:3000

go.mod

@@ -4,6 +4,7 @@ go 1.12
 
 require (
 	github.com/drone/drone-go v1.0.6
+	github.com/go-git/go-git/v5 v5.4.2
 	github.com/joho/godotenv v1.3.0
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/sirupsen/logrus v1.4.2

go.sum

@@ -1,23 +1,115 @@
 github.com/99designs/httpsignatures-go v0.0.0-20170731043157-88528bf4ca7e h1:rl2Aq4ZODqTDkeSqQBy+fzpZPamacO1Srp8zq7jf2Sc=
 github.com/99designs/httpsignatures-go v0.0.0-20170731043157-88528bf4ca7e/go.mod h1:Xa6lInWHNQnuWoF0YPSsx+INFA9qk7/7pTjwb3PInkY=
+github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
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+github.com/ProtonMail/go-crypto v0.0.0-20210428141323-04723f9f07d7/go.mod h1:z4/9nQmJSSwwds7ejkxaJwO37dru3geImFUdJlaLzQo=
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main.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"net/http"
+	"time"
 
 	"git.entr0py.de/garionion/drone-yaml-server/plugin"
 	"github.com/drone/drone-go/plugin/config"
@@ -21,10 +22,10 @@ type spec struct {
 	Debug  bool   `envconfig:"DRONE_DEBUG"`
 	Secret string `envconfig:"DRONE_SECRET"`
 
-	// TODO replace or remove these configuration
+	Repo           string        `envconfig:"DRONE_YAML_REPO"`
-	// parameters. They are for demo purposes only.
+	Branch         string        `envconfig:"DRONE_BRANCH"`
-	Param1 string `envconfig:"DRONE_PARAM_1"`
+	Token          string        `envconfig:"DRONE_TOKEN"`
-	Param2 string `envconfig:"DRONE_PARAM_2"`
+	FetchFrequency time.Duration `envconfig:"DRONE_FETCH_FREQUENCY"`
 }
 
 func main() {
@@ -44,12 +45,24 @@ func main() {
 		spec.Bind = ":3000"
 	}
 
+	if spec.Repo == "" {
+		logrus.Fatalln("missing repo")
+	}
+
+	if spec.Branch == "" {
+		spec.Branch = "main"
+	}
+
+	if spec.FetchFrequency == 0 {
+		spec.FetchFrequency = 10 * time.Minute
+	}
+
 	handler := config.Handler(
 		plugin.New(
-			// TODO replace or remove these configuration
+			spec.Repo,
-			// parameters. They are for demo purposes only.
+			spec.Branch,
-			spec.Param1,
+			spec.Token,
-			spec.Param2,
+			spec.FetchFrequency,
 		),
 		spec.Secret,
 		logrus.StandardLogger(),

plugin/plugin.go

@@ -6,6 +6,9 @@ package plugin
 
 import (
 	"context"
+	"git.entr0py.de/garionion/drone-yaml-server/repo"
+	"github.com/sirupsen/logrus"
+	"time"
 
 	"github.com/drone/drone-go/drone"
 	"github.com/drone/drone-go/plugin/config"
@@ -25,34 +28,41 @@ steps:
 `
 
 // New returns a new config plugin.
-func New(param1, param2 string) config.Plugin {
+func New(repository, branch, token string, frequency time.Duration) config.Plugin {
+	repos := repo.Repos{&repo.Repo{
+		URL:       repository,
+		Token:     token,
+		Branch:    branch,
+		Frequency: frequency,
+	}}
+	repos.Init()
+
 	return &plugin{
-		// TODO replace or remove these configuration
+		repos: repos,
-		// parameters. They are for demo purposes only.
-		param1: param1,
-		param2: param2,
 	}
 }
 
 type plugin struct {
-	// TODO replace or remove these configuration
+	repos repo.Repos
-	// parameters. They are for demo purposes only.
-	param1 string
-	param2 string
 }
 
 func (p *plugin) Find(ctx context.Context, req *config.Request) (*drone.Config, error) {
-	// TODO replace or remove
-	// this demonstrates how we can override
-	// and return a custom configuration file
 	if req.Repo.Namespace == "some-organization" {
 		return &drone.Config{
 			Data: defaultPipeline,
 		}, nil
 	}
 
-	// return nil and Drone will fallback to
+	configuration, err := p.repos.GetConfiguration(req.Repo.HTTPURL)
-	// the standard behavior for getting the
+	if err != nil {
-	// configuration file.
+		logrus.Error(err)
+		return nil, err
+	}
+	if configuration != "" {
+		return &drone.Config{
+			Data: configuration,
+		}, nil
+	}
+
 	return nil, nil
 }

repo/repo.go

@@ -0,0 +1,90 @@
+package repo
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/json"
+	"fmt"
+	"github.com/go-git/go-git/v5"
+	"github.com/sirupsen/logrus"
+	"io/ioutil"
+	"os"
+	"path"
+	"time"
+)
+
+type Repo struct {
+	URL       string
+	Token     string
+	Branch    string
+	Path      string
+	Frequency time.Duration
+	ConfigMap map[string]string
+}
+
+type Repos []*Repo
+
+func (repo *Repo) clone() error {
+	logrus.Infof("Cloning %s into %s", repo.Branch, repo.Path)
+	_, err := git.PlainClone(repo.Path, false, &git.CloneOptions{
+		URL: repo.URL,
+	})
+	if err != nil {
+		logrus.Errorf("Error while cloning %s: %v", repo.URL, err)
+	}
+	return err
+}
+
+func (repo *Repo) setConfigMap() error {
+	data, err := repo.readFile("drone-config-map.json")
+	if err != nil {
+		return err
+	}
+	err = json.Unmarshal(data, &repo.ConfigMap)
+	if err != nil {
+		return err
+	}
+	logrus.Printf("%+v", repo.ConfigMap)
+
+	return nil
+}
+
+func (repo *Repo) readFile(fileName string) ([]byte, error) {
+	if _, err := os.Stat(path.Join(repo.Path, fileName)); err == nil {
+		data, err := ioutil.ReadFile(path.Join(repo.Path, fileName))
+		if err != nil {
+			return nil, err
+		}
+		return data, nil
+	}
+	return nil, fmt.Errorf("File %s not found in %s", fileName, repo.Path)
+}
+
+func (repos *Repos) GetConfiguration(git_http_url string) (string, error) {
+	fmt.Println(git_http_url)
+	for _, repo := range *repos {
+		if file, found := repo.ConfigMap[git_http_url]; found {
+			data, err := repo.readFile(file)
+			if err != nil {
+				return "", err
+			}
+			return bytes.NewBuffer(data).String(), nil
+		}
+	}
+	return "", nil
+}
+
+func (r *Repos) Init() {
+	os.RemoveAll("/tmp/drone-yaml-server")
+	for _, repo := range *r {
+		if repo.Branch == "" {
+			repo.Branch = "main"
+		}
+		if repo.Path == "" {
+			repo.Path = fmt.Sprintf("/tmp/drone-yaml-server/%x", sha256.Sum256([]byte(fmt.Sprintf("%s%s", repo.URL, repo.Branch))))
+		}
+
+		repo.clone()
+		repo.setConfigMap()
+	}
+}