Added README and clean codebase

Author: Eugene Dementiev

README.md

@@ -0,0 +1,110 @@
+SSM Parent
+----------
+
+This is a parent process for Docker with one addition: it can read from AWS SSM Parameter store.
+
+The way it works is that ssm-parent can be used as an entrypoint for Docker. Firstly, it retrieves all specified parameters, then injects them to the environment,
+and finally runs the command.
+
+All parameters must be in JSON format, i.e.:
+
+```
+    {
+        "ENVIRONMENT": "production"
+    }
+```
+
+If a few parameters are specified, all JSON entities will be read and merged into one, overriding existing keys, i.e.
+
+Parameter one:
+```
+    {
+        "USERNAME": "myuser",
+        "DATABASE": "production"
+    }
+```
+
+Parameter two:
+```
+    {
+        "DATABASE": "test"
+    }
+```
+
+The result will be merged as this:
+```
+    {
+        "USERNAME": "myuser",
+        "DATABASE": "test"
+    }
+```
+
+### How to use
+
+
+That should be pretty self-explanatory.
+
+```
+$ssm-parent help                                                                                                         <aws:hosting>
+SSM-Parent is a docker entrypoint.
+
+It gets specified parameters (possibly secret) from AWS SSM Parameter Store,
+then exports them to the underlying process.
+
+Usage:
+  ssm-parent [command]
+
+Available Commands:
+  help        Help about any command
+  print       Prints the specified parameters.
+  run         Runs the specified command
+
+Flags:
+  -h, --help               help for ssm-parent
+  -n, --name stringArray   Name of the SSM parameter to retrieve. Can be specified multiple times.
+  -p, --path stringArray   Path to a SSM parameter. Can be specified multiple times.
+  -r, --recursive          Walk through the provided SSM paths recursively.
+  -s, --strict             Strict mode. Fail if found less parameters than number of names.
+
+Use "ssm-parent [command] --help" for more information about a command.
+```
+
+The command `ssm-parent print` can be used to check the result.
+
+### Example Dockerfile part
+
+```
+ENV PROJECT myproject
+ENV ENVIRONMENT production
+
+RUN wget -O /tmp/ssm-parent.tar.gz https://github.com/springload/ssm-parent/releases/download/v0.4/ssm-parent_0.4_linux_amd64.tar.gz && \
+    tar xvf /tmp/ssm-parent.tar.gz && mv ssm-parent /sbin/ssm-parent && rm /tmp/ssm-parent.tar.gz
+
+ENTRYPOINT ["/sbin/ssm-parent", "run", "-e", "-p", "/$PROJECT/$ENVIRONMENT/backend/", "-r",  "--"]
+CMD ["caddy" , "--conf", "/etc/Caddyfile", "--log", "stdout"]
+```
+
+### Config generation
+
+If your application can't be configured via environment variables, then the following script, utilising `envsubst`, can be used to generate configs.
+```
+#!/bin/sh
+
+echo "Bootstrapping Caddy"
+envsubst < /etc/Caddyfile.env > /etc/Caddyfile
+
+exec $@
+```
+
+### How to build
+
+This project uses https://github.com/golang/dep as a dependency manager. Go v.1.10.1 was used.
+
+```
+    $git clone https://github.com/springload/ssm-parent.git
+    $cd ssm-parent && dep ensure
+    $go build
+    # (after some hacking)
+    $git tag vXXX && git push && git push --tags
+    $goreleaser # to create a new release
+```

cmd/print.go

@@ -1,17 +1,3 @@
-// Copyright © 2018 NAME HERE <EMAIL ADDRESS>
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
 package cmd
 
 import (

ssm/parameters.go

@@ -19,9 +19,9 @@ func makeSession() error {
 		var err error
 		// create AWS session
 		localSession, err = session.NewSessionWithOptions(session.Options{
-			Config:            aws.Config{}, //Region: aws.String(config.Region)},
+			Config:            aws.Config{},
 			SharedConfigState: session.SharedConfigEnable,
-			Profile:           "", //config.Profile,
+			Profile:           "",
 		})
 		if err != nil {
 			return fmt.Errorf("Can't get aws session.")
@@ -53,9 +53,7 @@ func getJsonSSMParametersByPaths(paths []string, strict, recursive bool) (parame
 			}
 			parameters = append(parameters, value)
 		}
-
 	}
-
 	return
 }