minor fixes, add readme and installer scripts

.goreleaser.yml

@@ -0,0 +1,34 @@
+before:
+  hooks:
+    - go mod download
+builds:
+  - main: main.go
+    binary: helm-blob
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - windows
+      - linux
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+archive:
+  format: tar.gz
+  files:
+    - README.md
+    - LICENSE
+    - plugin.yaml
+    - scripts/install_plugin.sh
+    - scripts/helm-blob.sh
+  name_template: "{{ .ProjectName }}_{{ .Os }}_{{ .Arch }}_{{ .Tag }}"
+checksum:
+  name_template: "checksums.txt"
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"

.travis.yml

@@ -0,0 +1,30 @@
+language: go
+go:
+  - "1.13"
+
+env:
+  - GO111MODULE=on
+
+before_install:
+  - sudo apt-get update
+  - sudo apt-get install -y libpcap-dev gcc
+
+install:
+  - go mod download
+
+after_success:
+  # Set up git user name and tag this commit
+  - git config --global user.email "[email protected]"
+  - git config --global user.name "Travis CI"
+  - export TRAVIS_TAG=${TRAVIS_TAG:-$(cat VERSION)}
+  - git tag -a $TRAVIS_TAG $(git log --format=%h -1) -m "Generated tag from Travis CI based on VERSION file"
+  - test -n "$TRAVIS_TAG" && curl -s https://raw.githubusercontent.com/goreleaser/get/master/latest | bash
+
+deploy:
+  - provider: script
+    github_token: $GITHUB_TOKEN
+    skip_cleanup: true
+    script: curl -sL https://git.io/goreleaser | bash
+
+notifications:
+  email: false

README.md

@@ -1,2 +1,98 @@
-# helm-blob
-Helm Plugin that allows you to manage private helm repositories on blob storage(Azure Blob, GCS, S3)
+# helm-blob [![Build Status](https://travis-ci.org/C123R/helm-blob.svg?branch=master)](https://travis-ci.org/C123R/helm-blob)
+
+`helm-blob` plugin allows you to manage helm repositories on the blob storage like Azure Blob, GCS, S3, etc.
+
+This plugin supports operations like uploading or deletion of charts from remote Helm Repository hosted on Blob Storage. It could be used to initialize the new Helm Repository.
+
+`helm-blob` was inspired by [Alex Khaerov's](https://github.com/hayorov) [helm-gcs](https://github.com/hayorov/helm-gcs) plugin with extending support for Azure Blob storage and S3, which makes helm-blob to support Azure Blob, GCS, S3 storage.
+
+This plugin uses Go Cloud's [Blob](https://gocloud.dev/howto/blob/) package.
+
+## Installation
+
+```sh
+helm plugin install https://github.com/C123R/helm-blob
+```
+
+## Usage
+
+- ### Initialize a new chart repository
+
+  ```sh
+  helm blob init azblob://helmrepo
+  ```
+
+  Note: This command will not create new blob storage, moreover
+  it will just add empty index.yaml file.
+
+- ### Add your repository to Helm
+
+  ```sh
+  helm repo add azurehelm azblob://helmrepo
+  ```
+
+- ### Push a new chart to your repository
+
+  ```sh
+  helm blob push mychart.tar.gz azurehelm
+  ```
+
+- ### Updating Helm cache (Required after pushing new chart)
+
+  ```sh
+  helm repo update
+  ```
+
+- ### Fetch the chart
+
+  ```sh
+  helm fetch azurehelm/mychart
+  ```
+
+- ### Delete a chart
+
+  ```sh
+  helm blob delete mychart azurehelm
+  ```
+
+  Note: This will delete all chart versions from remote repository. To delete a specific chart:
+
+  ```sh
+  helm blob delete mychart -v 0.3.0 azurehelm
+  ```
+
+## Authentication
+
+Helm blob's plugin authentication varies depending upon the blob provider as mentioned below:
+
+- ### S3
+
+  S3 provider support AWS [default credential provider](https://docs.aws.amazon.com/sdk-for-go/v1/developer-guide/configuring-sdk.html#specifying-credentials) chain in the following order:
+
+  - Environment variables.
+
+  - Shared credentials file.
+
+  - If your application is running on an Amazon EC2 instance, IAM role for Amazon EC2.
+
+- ### Azure Blob
+
+  Currently it supports authentication only with [environment variables](https://docs.microsoft.com/en-us/azure/storage/common/storage-azure-cli#set-default-azure-storage-account-environment-variables):
+
+  - AZURE_STORAGE_ACCOUNT
+  - AZURE_STORAGE_KEY or AZURE_STORAGE_SAS_TOKEN
+
+- ### [GCS](https://cloud.google.com/docs/authentication/production)
+
+  GCS provider uses [Application Default Credentials](https://cloud.google.com/docs/authentication/production) in the following order:
+
+  - Environment Variable (GOOGLE_APPLICATION_CREDENTIALS)
+  - Default Service Account from the compute instance(Compute Engine, Kubernetes Engine, Cloud function etc).
+
+  To authenticate against GCS you can:
+
+  - Use the [application default credentials](https://cloud.google.com/sdk/gcloud/reference/auth/application-default/)
+
+  - Use a service account via the global flag `--service-account`
+
+  See [the GCP documentation](https://cloud.google.com/docs/authentication/production#providing_credentials_to_your_application) for more information.

cmd/helm-blob/delete.go

@@ -10,7 +10,7 @@ var version string
 // deleteCmd represents the delete command
 var deleteCmd = &cobra.Command{
 	Use:   "delete <chart-name> <repo-name>",
-	Short: "deletes a chart from repository",
+	Short: "Deletes a chart from repository",
 	Args:  cobra.MinimumNArgs(2),
 	Long: `
 Delete command deletes a chart from a remote repository.

cmd/helm-blob/fetch.go

@@ -10,21 +10,22 @@ import (
 // fetchCmd represents the fetch command
 var fetchCmd = &cobra.Command{
 	Use:   "fetch <blob-url>",
-	Short: "fetches file from blob",
+	Short: "Fetches file from blob",
 	Args:  cobra.MinimumNArgs(1),
 	Long: `
 Fetch command fetches file from remote chart and prints it on standard output.
 `,
 	RunE: func(cmd *cobra.Command, args []string) error {
 
-		// workaround: "helm repo add" commands sends url
-		// with index.yaml path appended in it
-		repoUrl := strings.TrimRight(args[0], "index.yaml")
+		urlParts := strings.Split(args[0], "/")
+		file2download := urlParts[len(urlParts)-1]
+		repoUrl := strings.TrimRight(args[0], file2download)
+
 		r, err := repo.NewRepoByUrl(repoUrl)
 		if err != nil {
 			return err
 		}
-		if err = r.Fetch(); err != nil {
+		if err = r.Fetch(file2download); err != nil {
 			return err
 		}
 		return nil

cmd/helm-blob/init.go

@@ -1,14 +1,16 @@
 package cmd
 
 import (
+	"fmt"
+
 	"github.com/C123R/helm-blob/pkg/repo"
 	"github.com/spf13/cobra"
 )
 
 // initCmd represents the init command
 var initCmd = &cobra.Command{
 	Use:   "init <blob-url>",
-	Short: "initialize new repository",
+	Short: "Initialize new repository",
 	Args:  cobra.ExactValidArgs(1),
 	Long: `
 Init command will initialize a new helm repository on provided blob url.
@@ -25,6 +27,10 @@ it will just add empty index.yaml file.
 		if err = r.Init(); err != nil {
 			return err
 		}
+		fmt.Printf(`Successfully initialized %s.
+
+Now you can add this repo using 'helm repo add <repo-name> %s'`, repoUrl, repoUrl)
+		fmt.Println()
 		return nil
 	},
 }

cmd/helm-blob/push.go

@@ -10,10 +10,11 @@ var force bool
 // pushCmd represents the push command
 var pushCmd = &cobra.Command{
 	Use:   "push <chart-name> <repo-name>",
-	Short: "uploads a chart into a repository",
+	Short: "Uploads a chart into a repository",
 	Args:  cobra.ExactValidArgs(2),
 	Long: `
-Push command uploads a chart into a remote repository.
+Push command uploads a chart into a remote repository and merge
+with remote index file.
 `,
 	Example: `helm blob push sample-chart.tgz sample-repository`,
 	RunE: func(cmd *cobra.Command, args []string) error {

cmd/helm-blob/version.go

@@ -10,7 +10,7 @@ import (
 // versionCmd represents the version command
 var versionCmd = &cobra.Command{
 	Use:   "version",
-	Short: "print the current helm-blob version",
+	Short: "Print the current helm-blob version",
 	Args:  cobra.NoArgs,
 	RunE: func(cmd *cobra.Command, args []string) error {
 		byte, err := ioutil.ReadFile("VERSION")

go.mod

@@ -3,15 +3,15 @@ module github.com/C123R/helm-blob
 go 1.13
 
 require (
-	github.com/Masterminds/semver v1.5.0 // indirect
+	github.com/Azure/go-autorest/autorest/azure/auth v0.4.2 // indirect
 	github.com/aws/aws-sdk-go v1.20.6 // indirect
-	github.com/spf13/cobra v0.0.6
-	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/spf13/cobra v0.0.7
 	gocloud.dev v0.19.0
-	golang.org/x/net v0.0.0-20191004110552-13f9640d40b9 // indirect
+	golang.org/x/net v0.0.0-20200226121028-0de0cce0169b // indirect
 	golang.org/x/sys v0.0.0-20191022100944-742c48ecaeb7 // indirect
-	gopkg.in/yaml.v2 v2.2.8
-	helm.sh/helm v3.0.0-beta.3+incompatible
-	k8s.io/client-go v11.0.0+incompatible // indirect
-	sigs.k8s.io/yaml v1.2.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+	helm.sh/helm/v3 v3.1.0
+	sigs.k8s.io/yaml v1.2.0
 )
+
+replace github.com/Azure/go-autorest => github.com/Azure/go-autorest v12.2.0+incompatible