forked from flynn/flynn
/
env.go
196 lines (168 loc) · 4.25 KB
/
env.go
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package main
import (
"errors"
"fmt"
"log"
"sort"
"strings"
"github.com/flynn/flynn/controller/client"
ct "github.com/flynn/flynn/controller/types"
"github.com/flynn/go-docopt"
)
func init() {
register("env", runEnv, `
usage: flynn env [-t <proc>]
flynn env set [-t <proc>] <var>=<val>...
flynn env unset [-t <proc>] <var>...
flynn env get [-t <proc>] <var>
Manage app environment variables.
Options:
-t, --process-type=<proc> set or read env for specified process type
Commands:
With no arguments, shows a list of environment variables.
set sets value of one or more env variables
unset deletes one or more variables
get returns the value of variable
Examples:
$ flynn env set FOO=bar BAZ=foobar
Created release 5058ae7964f74c399a240bdd6e7d1bcb.
$ flynn env
BAZ=foobar
FOO=bar
$ flynn env get -t web FOO
bar
$ flynn env unset FOO
Created release b1bbd9bc76d6436ea2fd245300bce72e.
`)
}
var envProc string
func runEnv(args *docopt.Args, client controller.Client) error {
envProc = args.String["--process-type"]
if args.Bool["set"] {
return runEnvSet(args, client)
} else if args.Bool["unset"] {
return runEnvUnset(args, client)
} else if args.Bool["get"] {
return runEnvGet(args, client)
}
release, err := client.GetAppRelease(mustApp())
if err == controller.ErrNotFound {
return nil
}
if err != nil {
return err
}
if envProc != "" {
if release.Env == nil {
release.Env = make(map[string]string)
}
for k, v := range release.Processes[envProc].Env {
release.Env[k] = v
}
}
vars := make([]string, 0, len(release.Env))
for k, v := range release.Env {
vars = append(vars, k+"="+v)
}
sort.Strings(vars)
for _, v := range vars {
fmt.Println(v)
}
return nil
}
func runEnvSet(args *docopt.Args, client controller.Client) error {
pairs := args.All["<var>=<val>"].([]string)
env := make(map[string]*string, len(pairs))
for _, s := range pairs {
v := strings.SplitN(s, "=", 2)
if len(v) != 2 {
return fmt.Errorf("invalid var format: %q", s)
}
env[v[0]] = &v[1]
}
id, err := setEnv(client, envProc, env)
if err != nil {
return err
}
log.Printf("Created release %s.", id)
return nil
}
func runEnvUnset(args *docopt.Args, client controller.Client) error {
vars := args.All["<var>"].([]string)
env := make(map[string]*string, len(vars))
for _, s := range vars {
env[s] = nil
}
id, err := setEnv(client, envProc, env)
if err != nil {
return err
}
log.Printf("Created release %s.", id)
return nil
}
func runEnvGet(args *docopt.Args, client controller.Client) error {
arg := args.All["<var>"].([]string)[0]
release, err := client.GetAppRelease(mustApp())
if err == controller.ErrNotFound {
return errors.New("no app release found")
}
if err != nil {
return err
}
if _, ok := release.Processes[envProc]; envProc != "" && !ok {
return fmt.Errorf("process type %q not found in release %s", envProc, release.ID)
}
if v, ok := release.Env[arg]; ok {
fmt.Println(v)
return nil
}
if v, ok := release.Processes[envProc].Env[arg]; ok {
fmt.Println(v)
return nil
}
return fmt.Errorf("var %q not found in release %q", arg, release.ID)
}
func setEnv(client controller.Client, proc string, env map[string]*string) (string, error) {
release, err := client.GetAppRelease(mustApp())
if err == controller.ErrNotFound {
release = &ct.Release{}
if proc != "" {
release.Processes = make(map[string]ct.ProcessType)
release.Processes[proc] = ct.ProcessType{}
}
} else if err != nil {
return "", err
}
var dest map[string]string
if proc != "" {
if _, ok := release.Processes[proc]; !ok {
return "", fmt.Errorf("process %q in release %s not found", proc, release.ID)
}
if release.Processes[proc].Env == nil {
p := release.Processes[proc]
p.Env = make(map[string]string, len(env))
release.Processes[proc] = p
}
dest = release.Processes[proc].Env
} else {
if release.Env == nil {
release.Env = make(map[string]string, len(env))
}
dest = release.Env
}
for k, v := range env {
if v == nil {
delete(dest, k)
} else {
dest[k] = *v
}
}
release.ID = ""
if err := client.CreateRelease(release); err != nil {
return "", err
}
if err := client.DeployAppRelease(mustApp(), release.ID, nil); err != nil {
return "", err
}
return release.ID, nil
}