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package main
import (
"database/sql"
"flag"
"fmt"
"os"
"path/filepath"
"strings"
"text/tabwriter"
)
// =============================================================================
// hosty config
// =============================================================================
func cmdConfig(args []string) error {
fs := flag.NewFlagSet("config", flag.ExitOnError)
fs.Usage = func() {
fmt.Print(`Usage: hosty config -name NAME [-state-dir DIR] [-system] [-new SPEC] [-set KEY=VALUE] [-unset KEY]
View and manage app configuration values.
Without any flags: list all config keys with descriptions and current values.
-new declares a new config key using the same spec format as hosty pack -config:
KEY:description:modifiers (modifiers: required, optional, sensitive, default=VALUE)
Use :: to embed a literal colon in the description.
-set requires the key to be declared (via -new or hosty pack -config).
-new and -set may be combined in one invocation to declare and set simultaneously.
Use the same -system as 'hosty start'; it selects the state directory the app
was installed into.
Run 'hosty start -name NAME' after changing config to apply changes.
Options:
`)
fs.PrintDefaults()
}
name := fs.String("name", "", "App name (required)")
stateDir := fs.String("state-dir", "", "State directory (default: $XDG_STATE_HOME/hosty, or /var/lib/hosty with -system)")
system := fs.Bool("system", false, "Operate on a root portable service instead of a --user unit")
var news multiFlag
fs.Var(&news, "new", "Declare a new config key: KEY:desc:modifiers (repeatable)")
var sets multiFlag
fs.Var(&sets, "set", "Set a config value: KEY=VALUE (repeatable, key must be declared)")
var unsets multiFlag
fs.Var(&unsets, "unset", "Unset a config value: KEY (repeatable)")
if err := fs.Parse(args); err != nil {
return err
}
if *name == "" {
fs.Usage()
return fmt.Errorf("-name is required")
}
sd, err := resolveStateDir(*stateDir, *system)
if err != nil {
return err
}
appDir := filepath.Join(sd, *name)
dataPath := filepath.Join(appDir, "data.hosty")
if !fileExists(dataPath) {
return fmt.Errorf("app %q is not installed (no data.hosty at %s)", *name, dataPath)
}
if len(news) == 0 && len(sets) == 0 && len(unsets) == 0 {
return configList(sd, appDir, *name, *system)
}
dataDB, err := openDB(dataPath)
if err != nil {
return fmt.Errorf("opening data.hosty: %w", err)
}
defer dataDB.Close()
envDB, err := openEnvDB(sd)
if err != nil {
return err
}
defer envDB.Close()
// Process -new declarations first so -set can reference them.
for _, spec := range news {
e, err := parseConfigEntry(spec)
if err != nil {
return fmt.Errorf("-new %q: %w", spec, err)
}
var defVal any
if e.defaultVal != nil {
defVal = *e.defaultVal
}
reqInt, sensInt := 0, 0
if e.required {
reqInt = 1
}
if e.sensitive {
sensInt = 1
}
if _, err := dataDB.Exec(`
INSERT INTO _hosty_config (key, description, required, sensitive, default_val)
VALUES (?, ?, ?, ?, ?)
ON CONFLICT(key) DO UPDATE SET
description = excluded.description,
required = excluded.required,
sensitive = excluded.sensitive,
default_val = excluded.default_val
`, e.key, e.desc, reqInt, sensInt, defVal); err != nil {
return fmt.Errorf("declaring config %q: %w", e.key, err)
}
fmt.Fprintf(os.Stderr, "hosty config: declared %s (%s)\n", e.key, e.desc)
}
for _, kv := range sets {
before, after, ok := strings.Cut(kv, "=")
if !ok {
return fmt.Errorf("-set %q: expected KEY=VALUE", kv)
}
key, val := before, after
// Key must be declared — error if not found.
var sens int
var count int
dataDB.QueryRow(`SELECT COUNT(*), COALESCE(sensitive, 0) FROM _hosty_config WHERE key = ?`, key).Scan(&count, &sens)
if count == 0 {
return fmt.Errorf(
"-set %q: key not declared in _hosty_config\n\n"+
"Declare it first with -new, for example:\n"+
" hosty config%s -name %s -new \"%s:Description of what this does:optional\" -set %s=%s",
key, systemFlagArg(*system), *name, key, key, val)
}
if sens == 1 {
if err := secretSet(envDB, *name, key, val); err != nil {
return fmt.Errorf("setting sensitive %q: %w", key, err)
}
fmt.Fprintf(os.Stderr, "hosty config: set %s (sensitive, stored in %s)\n", key, envDBName)
} else {
if _, err := dataDB.Exec(`UPDATE _hosty_config SET value = ? WHERE key = ?`, val, key); err != nil {
return fmt.Errorf("setting %q: %w", key, err)
}
fmt.Fprintf(os.Stderr, "hosty config: set %s = %s\n", key, val)
}
}
for _, key := range unsets {
dataDB.Exec(`UPDATE _hosty_config SET value = NULL WHERE key = ?`, key)
if err := secretUnset(envDB, *name, key); err != nil {
return fmt.Errorf("unsetting %q: %w", key, err)
}
fmt.Fprintf(os.Stderr, "hosty config: unset %s\n", key)
}
if len(news)+len(sets)+len(unsets) > 0 {
// Must repeat -system: without it the suggested command would install a
// second, unrelated copy of the app under the user state dir.
fmt.Fprintf(os.Stderr, "\nRun 'hosty start%s -name %s' to apply changes.\n",
systemFlagArg(*system), *name)
}
return nil
}
// systemFlagArg renders " -system" when in system mode, for embedding in the
// command lines hosty suggests to the user.
func systemFlagArg(system bool) string {
if system {
return " -system"
}
return ""
}
func configList(stateDir, appDir, name string, system bool) error {
dataPath := filepath.Join(appDir, "data.hosty")
dataDB, err := openReadOnlyDB(dataPath)
if err != nil {
return fmt.Errorf("opening data.hosty: %w", err)
}
defer dataDB.Close()
envDB, err := openEnvDB(stateDir)
if err != nil {
return err
}
defer envDB.Close()
rows, err := dataDB.Query(`
SELECT key, description, required, sensitive, default_val, value
FROM _hosty_config
ORDER BY required DESC, key
`)
if err != nil {
fmt.Printf("Configuration for %s: (no config declared)\n", name)
return nil
}
defer rows.Close()
type cfgEntry struct {
key string
desc string
required bool
sensitive bool
defaultVal sql.NullString
dataValue sql.NullString
}
var entries []cfgEntry
for rows.Next() {
var e cfgEntry
var req, sens int
if err := rows.Scan(&e.key, &e.desc, &req, &sens, &e.defaultVal, &e.dataValue); err != nil {
return err
}
e.required = req == 1
e.sensitive = sens == 1
entries = append(entries, e)
}
if len(entries) == 0 {
fmt.Printf("Configuration for %s: (no config declared)\n", name)
return nil
}
fmt.Printf("Configuration for %s:\n\n", name)
tw := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
fmt.Fprintln(tw, "KEY\tVALUE\tDESCRIPTION")
var unsetRequired []string
for _, e := range entries {
var valStr string
if e.sensitive {
// Look up in the environment database.
if sv, err := secretGet(envDB, name, e.key); err == nil {
_ = sv
valStr = "(set)"
} else if e.defaultVal.Valid {
valStr = "(default: " + e.defaultVal.String + ")"
} else {
valStr = "(unset)"
if e.required {
unsetRequired = append(unsetRequired, e.key)
}
}
} else {
switch {
case e.dataValue.Valid:
valStr = e.dataValue.String
case e.defaultVal.Valid:
valStr = "(default: " + e.defaultVal.String + ")"
default:
valStr = "(unset)"
if e.required {
unsetRequired = append(unsetRequired, e.key)
}
}
}
desc := e.desc
var mods []string
if e.required {
mods = append(mods, "required")
} else {
mods = append(mods, "optional")
}
if e.sensitive {
mods = append(mods, "sensitive")
}
if len(mods) > 0 {
desc += " (" + strings.Join(mods, ", ") + ")"
}
fmt.Fprintf(tw, "%s\t%s\t%s\n", e.key, valStr, desc)
}
tw.Flush()
if len(unsetRequired) > 0 {
fmt.Printf("\nRequired values not set: %s\n", strings.Join(unsetRequired, ", "))
fmt.Printf("Use 'hosty config%s -name %s -set KEY=VALUE' to configure.\n",
systemFlagArg(system), name)
}
return nil
}
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