// Receive receives a Git repo.
// This will only work for git-receive-pack.
//
// Params:
// - operation (string): e.g. git-receive-pack
// - repoName (string): The repository name, in the form '/REPO.git'.
// - channel (ssh.Channel): The channel.
// - request (*ssh.Request): The channel.
// - gitHome (string): Defaults to /home/git.
// - fingerprint (string): The fingerprint of the user's SSH key.
// - user (string): The name of the Deis user.
//
// Returns:
// - nothing
func Receive(c cookoo.Context, p *cookoo.Params) (interface{}, cookoo.Interrupt) {
if ok, z := p.Requires("channel", "request", "fingerprint", "permissions"); !ok {
return nil, fmt.Errorf("Missing requirements %q", z)
}
repoName := p.Get("repoName", "").(string)
operation := p.Get("operation", "").(string)
channel := p.Get("channel", nil).(ssh.Channel)
gitHome := p.Get("gitHome", "/home/git").(string)
fingerprint := p.Get("fingerprint", nil).(string)
user := p.Get("user", "").(string)
repo, err := cleanRepoName(repoName)
if err != nil {
log.Warnf(c, "Illegal repo name: %s.", err)
channel.Stderr().Write([]byte("No repo given"))
return nil, err
}
repo += ".git"
if _, err := createRepo(c, filepath.Join(gitHome, repo), gitHome); err != nil {
log.Infof(c, "Did not create new repo: %s", err)
}
cmd := exec.Command("git-shell", "-c", fmt.Sprintf("%s '%s'", operation, repo))
log.Infof(c, strings.Join(cmd.Args, " "))
var errbuff bytes.Buffer
cmd.Dir = gitHome
cmd.Env = []string{
fmt.Sprintf("RECEIVE_USER=%s", user),
fmt.Sprintf("RECEIVE_REPO=%s", repo),
fmt.Sprintf("RECEIVE_FINGERPRINT=%s", fingerprint),
fmt.Sprintf("SSH_ORIGINAL_COMMAND=%s '%s'", operation, repo),
fmt.Sprintf("SSH_CONNECTION=%s", c.Get("SSH_CONNECTION", "0 0 0 0").(string)),
}
cmd.Env = append(cmd.Env, os.Environ()...)
done := plumbCommand(cmd, channel, &errbuff)
if err := cmd.Start(); err != nil {
log.Warnf(c, "Failed git receive immediately: %s %s", err, errbuff.Bytes())
return nil, err
}
fmt.Printf("Waiting for git-receive to run.\n")
done.Wait()
fmt.Printf("Waiting for deploy.\n")
if err := cmd.Wait(); err != nil {
log.Errf(c, "Error on command: %s %s", err, errbuff.Bytes())
return nil, err
}
if errbuff.Len() > 0 {
log.Warnf(c, "Unreported error: %s", errbuff.Bytes())
}
log.Infof(c, "Deploy complete.\n")
return nil, nil
}
// A command that can be used during a shutdown chain.
//
// Params:
// - dbname (required): the name of the db datasource.
func Close(cxt cookoo.Context, params *cookoo.Params) (interface{}, cookoo.Interrupt) {
ok, _ := params.Requires("dbname")
if !ok {
return nil, &cookoo.FatalError{"Expected dbname param."}
}
dbname := params.Get("dbname", nil).(string)
db, err := GetDb(cxt, dbname)
if err != nil {
return fatalError(err)
}
return nil, db.Close()
}
// Parse arguments for a "subcommand"
//
// The cookoo.cli.RequestResolver allows you to specify global level flags. This command
// allows you to augment those with subcommand flags. Example:
//
// $ myprog -foo=yes subcommand -bar=no
//
// In the above example, `-foo` is a global flag (set before the subcommand), while
// `-bar` is a local flag. It is specific to `subcommand`. This command lets you parse
// an arguments list given a pointer to a `flag.FlagSet`.
//
// Like the cookoo.cli.RequestResolver, this will place the parsed params directly into the
// context. For this reason, you ought not use the same flag names at both global and local
// flag levels. (The local will overwrite the global.)
//
// Params:
//
// - args: (required) A slice of arguments. Typically, this is `cxt:args` as set by
// cookoo.cli.RequestResolver.
// - flagset: (required) A set if flags (see flag.FlagSet) to parse.
//
// A slice of all non-flag arguments remaining after the parse are returned into the context.
//
// For example, if ['-foo', 'bar', 'some', 'other', 'data'] is passed in, '-foo' and 'bar' will
// be parsed out, while ['some', 'other', 'data'] will be returned into the context. (Assuming, of
// course, that the flag definition for -foo exists, and is a type that accepts a value).
//
// Thus, you will have `cxt:foo` available (with value `bar`) and everything else will be available
// in the slice under this command's context entry.
func ParseArgs(cxt cookoo.Context, params *cookoo.Params) (interface{}, cookoo.Interrupt) {
params.Requires("args", "flagset")
flagset := params.Get("flagset", nil).(*flag.FlagSet)
args := params.Get("args", nil).([]string)
// If this is true, we shift the args first.
if params.Get("subcommand", false).(bool) {
args = args[1:]
}
flagset.Parse(args)
addFlagsToContext(flagset, cxt)
return flagset.Args(), nil
}
// This is a utility function for executing statements.
//
// While we don't wrap all SQL statements, this particular command is here to
// facilitate creating databases. In other situations, it is assumed that the
// commands will handle SQL internally, and not use high-level commands to run
// each query.
//
// Params:
// - "statement": The statement to execute (as a string)
// - "dbname": The name of the datasource that references the DB.
//
// Returns:
// - database.sql.Result (core Go API)
//
// Example:
// req.Route("install", "Create DB").
// Does(sql.Execute, "exec").
// Using("dbname").WithDefault("db").
// Using("statement").WithDefault("CREATE TABLE IF NOT EXISTS names (id INT, varchar NAME)")
func Execute(cxt cookoo.Context, params *cookoo.Params) (interface{}, cookoo.Interrupt) {
ok, missing := params.Requires("statement", "dbname")
if !ok {
return nil, &cookoo.FatalError{fmt.Sprintf("Missing params: %s", strings.Join(missing, ","))}
}
dbname := params.Get("dbname", nil).(string)
statement := params.Get("statement", nil).(string)
db, err := GetDb(cxt, dbname)
if err != nil {
return nil, err
}
res, err := db.Exec(statement)
if err != nil {
return fatalError(err)
}
return res, nil
}
// Ping a database.
//
// If the Ping fails, this will return an error.
//
// Params
// - dbname: (required) the name of the database datasource.
//
// Returns:
// - boolean flag set to true if the Ping was successful.
func Ping(cxt cookoo.Context, params *cookoo.Params) (interface{}, cookoo.Interrupt) {
ok, _ := params.Requires("dbname")
if !ok {
e := &cookoo.RecoverableError{"Expected a dbname param."}
return false, e
}
dbname := params.Get("dbname", nil).(string)
db, err := GetDb(cxt, dbname)
if err != nil {
return false, err
}
err = db.Ping()
if err != nil {
return fatalError(err)
}
return true, nil
}
// RenderHTML renders an HTML template.
//
// This uses the `html/template` system built into Go to render data into a writer.
//
// Params:
// - template (required): An html/templates.Template object.
// - templateName (required): The name of the template to render.
// - values: An interface{} with the values to be passed to the template. If
// this is not specified, the contents of the Context are passed as a map[string]interface{}.
// Note that datasources, in this model, are not accessible to the template.
// - writer: The writer that data should be sent to. By default, this will create a new
// Buffer and put it into the context. (If no Writer was passed in, the returned writer
// is actually a bytes.Buffer.) To flush the contents directly to the client, you can
// use `.Using('writer').From('http.ResponseWriter')`.
//
// Returns
// - An io.Writer. The template's contents have already been written into the writer.
//
// Example:
//
// reg.Route("GET /html", "Test HTML").
// Does(cookoo.AddToContext, "_").
// Using("Title").WithDefault("Hello World").
// Using("Body").WithDefault("This is the body.").
// Does(web.RenderHTML, "render").
// Using("template").From('cxt:templateCache').
// Using("templateName").WithDefault("index.html").
// Does(web.Flush, "_").
// Using("contentType").WithDefault("text/html").
// Using("content").From("cxt:render")
//
// In the example above, we do three things:
// - Add Title and Body to the context. For the template rendered, it will see these as
// {{.Title}} and {{.Body}}.
// - Render the template located in a local file called "index.html". It is recommended that
// a template.Template object be created at startup. This way, all of the templates can
// be cached immediately and shared throughout processing.
// - Flush the result out to the client. This gives you a chance to add any additional headers.
func RenderHTML(cxt cookoo.Context, params *cookoo.Params) (interface{}, cookoo.Interrupt) {
ok, missing := params.Requires("template", "templateName")
if !ok {
return nil, &cookoo.FatalError{"Missing params: " + strings.Join(missing, ", ")}
}
var buf bytes.Buffer
out := params.Get("writer", &buf).(io.Writer)
tplName := params.Get("templateName", nil).(string)
tpl := params.Get("template", nil).(*template.Template)
vals := params.Get("values", cxt.AsMap())
err := tpl.ExecuteTemplate(out, tplName, vals)
if err != nil {
log.Printf("Recoverable error parsing template: %s", err)
// XXX: This outputs partially completed templates. Is this what we want?
io.WriteString(out, "Template error. The error has been logged.")
return out, &cookoo.RecoverableError{"Template failed to completely render."}
}
return out, nil
}
// Run a subcommand.
//
// Params:
// - args: a string[] of arguments, like you get from os.Args. This will assume the first arg
// is a subcommand. If you have options, you should parse those out first with ParseArgs.
// - default: The default subcommand to run if none is found.
// - offset: By default, this assumes an os.Args, and looks up the item in os.Args[1]. You can
// override this behavior by setting offset to something else.
// - ignoreRoutes: A []string of routes that should not be executed.
func RunSubcommand(cxt cookoo.Context, params *cookoo.Params) (interface{}, cookoo.Interrupt) {
params.Requires("args")
args := params.Get("args", nil).([]string)
offset := params.Get("offset", 1).(int)
var route string
if len(args) <= offset {
route = params.Get("default", "default").(string)
} else {
route = args[offset]
}
stoplist := params.Get("ignoreRoutes", []string{}).([]string)
if len(stoplist) > 0 {
for _, stop := range stoplist {
if stop == route {
return nil, &cookoo.FatalError{"Illegal route."}
}
}
}
return nil, &cookoo.Reroute{route}
}
// Receive receives a Git repo.
// This will only work for git-receive-pack.
//
// Params:
// - operation (string): e.g. git-receive-pack
// - repoName (string): The repository name, in the form '/REPO.git'.
// - channel (ssh.Channel): The channel.
// - request (*ssh.Request): The channel.
// - gitHome (string): Defaults to /home/git.
// - fingerprint (string): The fingerprint of the user's SSH key.
// - user (string): The name of the Deis user.
//
// Returns:
// - nothing
func Receive(c cookoo.Context, p *cookoo.Params) (interface{}, cookoo.Interrupt) {
if ok, z := p.Requires("channel", "request", "fingerprint", "permissions"); !ok {
return nil, fmt.Errorf("Missing requirements %q", z)
}
repoName := p.Get("repoName", "").(string)
operation := p.Get("operation", "").(string)
channel := p.Get("channel", nil).(ssh.Channel)
gitHome := p.Get("gitHome", "/home/git").(string)
fingerprint := p.Get("fingerprint", nil).(string)
user := p.Get("user", "").(string)
log.Debugf(c, "receiving git repo name: %s, operation: %s, fingerprint: %s, user: %s", repoName, operation, fingerprint, user)
repo, err := cleanRepoName(repoName)
if err != nil {
log.Warnf(c, "Illegal repo name: %s.", err)
channel.Stderr().Write([]byte("No repo given"))
return nil, err
}
repo += ".git"
repoPath := filepath.Join(gitHome, repo)
log.Debugf(c, "creating repo directory %s", repoPath)
if _, err := createRepo(c, repoPath); err != nil {
err = fmt.Errorf("Did not create new repo (%s)", err)
log.Warnf(c, err.Error())
return nil, err
}
log.Debugf(c, "writing pre-receive hook under %s", repoPath)
if err := createPreReceiveHook(c, gitHome, repoPath); err != nil {
err = fmt.Errorf("Did not write pre-receive hook (%s)", err)
log.Warnf(c, err.Error())
return nil, err
}
cmd := exec.Command("git-shell", "-c", fmt.Sprintf("%s '%s'", operation, repo))
log.Infof(c, strings.Join(cmd.Args, " "))
var errbuff bytes.Buffer
cmd.Dir = gitHome
cmd.Env = []string{
fmt.Sprintf("RECEIVE_USER=%s", user),
fmt.Sprintf("RECEIVE_REPO=%s", repo),
fmt.Sprintf("RECEIVE_FINGERPRINT=%s", fingerprint),
fmt.Sprintf("SSH_ORIGINAL_COMMAND=%s '%s'", operation, repo),
fmt.Sprintf("SSH_CONNECTION=%s", c.Get("SSH_CONNECTION", "0 0 0 0").(string)),
}
cmd.Env = append(cmd.Env, os.Environ()...)
log.Debugf(c, "Working Dir: %s", cmd.Dir)
log.Debugf(c, "Environment: %s", strings.Join(cmd.Env, ","))
inpipe, err := cmd.StdinPipe()
if err != nil {
return nil, err
}
cmd.Stdout = channel
cmd.Stderr = io.MultiWriter(channel.Stderr(), &errbuff)
if err := cmd.Start(); err != nil {
err = fmt.Errorf("Failed to start git pre-receive hook: %s (%s)", err, errbuff.Bytes())
log.Warnf(c, err.Error())
return nil, err
}
if _, err := io.Copy(inpipe, channel); err != nil {
err = fmt.Errorf("Failed to write git objects into the git pre-receive hook (%s)", err)
log.Warnf(c, err.Error())
return nil, err
}
fmt.Println("Waiting for git-receive to run.")
fmt.Println("Waiting for deploy.")
if err := cmd.Wait(); err != nil {
err = fmt.Errorf("Failed to run git pre-receive hook: %s (%s)", errbuff.Bytes(), err)
log.Errf(c, err.Error())
return nil, err
}
if errbuff.Len() > 0 {
log.Warnf(c, "Unreported error: %s", errbuff.Bytes())
}
log.Infof(c, "Deploy complete.\n")
return nil, nil
}
