First version

.gitignore

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+*.exe
+.drone.yml

README.md

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+# drone-add
+
+Easily add Drone.io to projects using Drone APIs and YAML templates.
+
+## Getting started
+
+### Install drone-add
+
+```sh
+go get -u git.fromouter.space/Hamcha/drone-add
+```
+
+or, if you have cloned the project locally, just `cd` to it and:
+
+```sh
+go install .
+```
+
+### Set environment variables
+
+To authenticate with Drone you'll need to get your user token.
+If you have the `drone` CLI tool, the environment variables are the same (`DRONE_SERVER` / `DRONE_TOKEN`).
+
+If you have drone secret you want to add, set them as environment variables using this format:
+
+`DRONE_SECRET_SECRET_NAME` → `secret_name`
+
+You can use template literals in your secrets, for example:
+
+`DRONE_SECRET_DOCKER_REPO = "my-custom-registry.tld/{{.Namespace}}/{{.Name}}"` with project `testorg/my-repo` will create a secret called `docker_repo` with value `my-custom-registry.tld/testorg/my-repo`
+
+### Change the template
+
+If you have not downloaded the project locally, download the template file from [here](https://git.fromouter.space/Hamcha/drone-add/raw/branch/master/template.yml).
+
+Change the template to fit what a starting `.drone.yml` for your projects would be like.
+Usually this means just populating common steps (like publish and deployment steps).
+
+You can also use template literals in the template.
+
+### Run the tool
+
+Usage:
+
+```sh
+drone-add [-t template.yml] [-o .drone.yml] namespace/repository
+```

go.mod

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+module git.fromouter.space/Hamcha/drone-add
+
+go 1.13
+
+require (
+	github.com/drone/drone-go v1.1.0
+	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
+)

go.sum

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+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/99designs/httpsignatures-go v0.0.0-20170731043157-88528bf4ca7e/go.mod h1:Xa6lInWHNQnuWoF0YPSsx+INFA9qk7/7pTjwb3PInkY=
+github.com/drone/drone-go v1.1.0 h1:2mritc5b7PhQWvILNyzaImZMRWVbMmmZ5Q0UDwwO7SI=
+github.com/drone/drone-go v1.1.0/go.mod h1:GxyeGClYohaKNYJv/ZpsmVHtMJ7WhoT+uDaJNcDIrk4=
+github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
+golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e h1:bRhVy7zSSasaqNksaRZiA5EEI+Ei4I1nO5Jh72wfHlg=
+golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 h1:SVwTIAaPC2U/AvvLNZ2a7OVsmBpC8L5BlwK1whH3hm0=
+golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
+golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+google.golang.org/appengine v1.4.0 h1:/wp5JvzpHIxhs/dumFmF7BXTf3Z+dd4uXta4kVyO508=
+google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=

main.go

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+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+	"text/template"
+
+	"github.com/drone/drone-go/drone"
+	"golang.org/x/oauth2"
+)
+
+const secretEnvPrefix = "DRONE_SECRET_"
+
+func main() {
+	tplpath := flag.String("t", "template.yml", "Template file")
+	outpath := flag.String("o", ".drone.yml", "Output .drone.yml")
+	flag.Parse()
+
+	// Get drone server and token
+
+	server := os.Getenv("DRONE_SERVER")
+	if server == "" {
+		fatal("DRONE_SERVER missing or empty")
+	}
+
+	token := os.Getenv("DRONE_TOKEN")
+	if token == "" {
+		fatal("DRONE_TOKEN missing or empty")
+	}
+
+	// Authenticate and connect to drone.io server
+
+	config := new(oauth2.Config)
+	auther := config.Client(
+		oauth2.NoContext,
+		&oauth2.Token{
+			AccessToken: token,
+		},
+	)
+
+	client := drone.NewClient(server, auther)
+
+	user, err := client.Self()
+	if err != nil {
+		fatal("Connection to drone.io failed: %s", err.Error())
+	}
+
+	// Get project
+
+	projectname := flag.Arg(0)
+	if projectname == "" {
+		fatal("Repository name missing or empty")
+	}
+
+	parts := strings.SplitN(projectname, "/", 2)
+	if len(parts) < 2 {
+		parts = []string{user.Login, projectname}
+	}
+	namespace := parts[0]
+	reponame := parts[1]
+
+	// Enable repository on Drone.io
+	repo, err := client.RepoEnable(namespace, reponame)
+	if err != nil {
+		fatal("Error enabling repository %s/%s: %s", namespace, reponame, err.Error())
+	}
+
+	// Get secrets
+
+	for _, env := range os.Environ() {
+		// Check for the magic prefix
+		if !strings.HasPrefix(env, secretEnvPrefix) {
+			continue
+		}
+
+		// Split key=val
+		parts := strings.SplitN(env, "=", 2)
+
+		// Ignore weird values
+		if len(parts) < 2 {
+			continue
+		}
+
+		secretName := strings.ToLower(parts[0][len(secretEnvPrefix):])
+		secretValue := parts[1]
+
+		tpl, err := template.New("secret-" + secretName).Parse(secretValue)
+		if err != nil {
+			fatal("Secret %s is an invalid template: %s", parts[0], err.Error())
+		}
+
+		var builder strings.Builder
+		err = tpl.Execute(&builder, repo)
+		if err != nil {
+			fatal("Error while building secret %s: %s", secretName, err.Error())
+		}
+
+		// Add secret to project
+		client.SecretCreate(repo.Namespace, repo.Name, &drone.Secret{
+			Name: secretName,
+			Data: secretValue,
+		})
+	}
+
+	// Read template file
+
+	tpl, err := template.ParseFiles(*tplpath)
+	if err != nil {
+		fatal("Cannot read template file: %s", err.Error())
+	}
+
+	// Create output file
+
+	outfile, err := os.Create(*outpath)
+	if err != nil {
+		fatal("Cannot create output file: %s", err.Error())
+	}
+	defer outfile.Close()
+
+	// Generate output from template
+
+	err = tpl.Execute(outfile, repo)
+	if err != nil {
+		fatal("Error processing template: %s", err.Error())
+	}
+}
+
+func fatal(msg string, args ...interface{}) {
+	fmt.Fprintf(os.Stderr, "FATAL: "+msg+"\n", args...)
+	os.Exit(1)
+}

template.yml

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+kind: pipeline
+name: default
+
+steps:
+  - name: publish
+    image: plugins/docker
+    settings:
+      auto_tag: true
+      registry:
+        from_secret: docker_registry
+      repo:
+        from_secret: docker_repo
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      event:
+        - push
+        - tag
+      branch: master