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invoke: load defaults from image config

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If user does not specify image certain container parameters, we can load
them from the exporter metadata.

Additionally, we introduce a new "default" value for the --invoke flag,
that keeps all of the default parameters (since cobra does not have an
easy way of accepting an optional flag argument).

Signed-off-by: Justin Chadwell <me@jedevc.com>
This commit is contained in:
Justin Chadwell
2022-09-20 16:23:18 +01:00
parent 294421db9c
commit 966c4d4e14
2 changed files with 67 additions and 27 deletions
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25
commands/build.go
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@ -326,18 +326,20 @@ func buildTargets(ctx context.Context, dockerCli command.Cli, opts map[string]bu
}
func parseInvokeConfig(invoke string) (cfg build.ContainerConfig, err error) {
cfg.Tty = true
if invoke == "default" {
return cfg, nil
}
csvReader := csv.NewReader(strings.NewReader(invoke))
fields, err := csvReader.Read()
if err != nil {
return cfg, err
}
cfg.Tty = true
if len(fields) == 1 && !strings.Contains(fields[0], "=") {
cfg.Args = []string{fields[0]}
cfg.Cmd = []string{fields[0]}
return cfg, nil
}
var entrypoint string
var args []string
for _, field := range fields {
parts := strings.SplitN(field, "=", 2)
if len(parts) != 2 {
@ -347,15 +349,15 @@ func parseInvokeConfig(invoke string) (cfg build.ContainerConfig, err error) {
value := parts[1]
switch key {
case "args":
args = append(args, value) // TODO: support JSON
cfg.Cmd = append(cfg.Cmd, value) // TODO: support JSON
case "entrypoint":
entrypoint = value // TODO: support JSON
cfg.Entrypoint = append(cfg.Entrypoint, value) // TODO: support JSON
case "env":
cfg.Env = append(cfg.Env, value)
case "user":
cfg.User = value
cfg.User = &value
case "cwd":
cfg.Cwd = value
cfg.Cwd = &value
case "tty":
cfg.Tty, err = strconv.ParseBool(value)
if err != nil {
@ -365,13 +367,6 @@ func parseInvokeConfig(invoke string) (cfg build.ContainerConfig, err error) {
return cfg, errors.Errorf("unknown key %q", key)
}
}
cfg.Args = args
if entrypoint != "" {
cfg.Args = append([]string{entrypoint}, cfg.Args...)
}
if len(cfg.Args) == 0 {
cfg.Args = []string{"sh"}
}
return cfg, nil
}