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package main
import (
"database/sql"
"flag"
"fmt"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
"text/tabwriter"
"time"
)
// =============================================================================
// hosty info
// =============================================================================
func cmdInfo(args []string) error {
fs := flag.NewFlagSet("info", flag.ExitOnError)
fs.Usage = func() {
fmt.Print(`Usage: hosty info [-name NAME] [-state-dir DIR] [-system]
Without -name: list all installed hosty apps.
With -name: show detailed info for one app.
Use the same -system as 'hosty start': system-mode apps live under
/var/lib/hosty and run as system units, so without -system they are not found.
Options:
`)
fs.PrintDefaults()
}
name := fs.String("name", "", "App name for detailed view")
stateDir := fs.String("state-dir", "", "State directory (default: $XDG_STATE_HOME/hosty, or /var/lib/hosty with -system)")
system := fs.Bool("system", false, "Inspect root portable services instead of --user units")
if err := fs.Parse(args); err != nil {
return err
}
sd, err := resolveStateDir(*stateDir, *system)
if err != nil {
return err
}
if *name != "" {
return infoOne(sd, *name, *system)
}
return infoAll(sd, *system)
}
// infoAll lists all installed hosty apps as a summary table.
func infoAll(stateDir string, system bool) error {
entries, err := os.ReadDir(stateDir)
if err != nil {
if os.IsNotExist(err) {
fmt.Println("no hosty apps installed")
return nil
}
return fmt.Errorf("reading state dir: %w", err)
}
// One environment database for the whole listing, opened read-only.
//
// This used to open a per-app database inside the loop, which *created* it
// as a side effect — so merely listing apps left a runtime.hosty behind in
// every directory it looked at, including apps that had never been started.
// Missing or unreadable is not an error here: listing must still work (with
// ports shown as "-") on a state dir that predates the environment
// database, or for a non-root user peering at a system state dir.
var envDB *sql.DB
if fileExists(envDBPath(stateDir)) {
if db, err := openEnvSQLReadOnly(envDBPath(stateDir)); err == nil {
envDB = db
defer envDB.Close()
}
}
tw := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
fmt.Fprintln(tw, "NAME\tVERSION\tPORT\tSIZE\tMODIFIED\tSTATUS")
for _, e := range entries {
// Not a plain IsDir() check: in system mode StateDirectory= leaves a
// symlink to /var/lib/private/<...> at the public path, which ReadDir
// reports as a link rather than a directory. Stat follows it; apps are
// then recognised by the presence of data.hosty either way.
fi, err := os.Stat(filepath.Join(stateDir, e.Name()))
if err != nil || !fi.IsDir() {
continue
}
appName := e.Name()
dataPath := filepath.Join(stateDir, appName, "data.hosty")
if !fileExists(dataPath) {
continue
}
version := "-"
port := "-"
if db, err := openReadOnlyDB(dataPath); err == nil {
if v, err := metaGet(db, "version"); err == nil {
version = v
}
db.Close()
}
if envDB != nil {
if p, err := appPort(envDB, appName); err == nil && p != "" {
port = p
}
}
size := "-"
modified := "-"
if fi, err := os.Stat(dataPath); err == nil {
size = humanSize(fi.Size())
modified = fi.ModTime().Format("2006-01-02 15:04:05")
}
status := serviceStatus(appName, system)
fmt.Fprintf(tw, "%s\t%s\t%s\t%s\t%s\t%s\n", appName, version, port, size, modified, status)
}
return tw.Flush()
}
// infoOne shows detailed info for a single installed hosty app.
func infoOne(stateDir, name string, system bool) error {
appDir := filepath.Join(stateDir, name)
dataPath := filepath.Join(appDir, "data.hosty")
if !fileExists(dataPath) {
return fmt.Errorf("no installed app %q (no data.hosty at %s)", name, dataPath)
}
db, err := openReadOnlyDB(dataPath)
if err != nil {
return fmt.Errorf("opening data.hosty: %w", err)
}
defer db.Close()
// Read-only and tolerant of absence: `hosty info` is an inspection command
// and must not create state or fail on a state dir that has none yet.
var envDB *sql.DB
if fileExists(envDBPath(stateDir)) {
if d, err := openEnvSQLReadOnly(envDBPath(stateDir)); err == nil {
envDB = d
defer envDB.Close()
}
}
// Read all _hosty_meta rows.
rows, err := db.Query(`SELECT key, value FROM _hosty_meta ORDER BY key`)
if err != nil {
return fmt.Errorf("reading _hosty_meta: %w", err)
}
defer rows.Close()
meta := make(map[string]string)
var metaKeys []string
for rows.Next() {
var k, v string
if err := rows.Scan(&k, &v); err != nil {
return err
}
meta[k] = v
metaKeys = append(metaKeys, k)
}
// Image size from DB (sum of compressed content blobs in _hosty_image_fs).
var imageSize int64
_ = db.QueryRow(`SELECT COALESCE(SUM(length(content_zstd)), 0) FROM _hosty_image_fs`).Scan(&imageSize)
// DB file stats.
fi, err := os.Stat(dataPath)
if err != nil {
return err
}
status := serviceStatus(name, system)
lastActive := serviceLastActive(name, system)
mode := "user"
if system {
mode = "system"
}
fmt.Printf("%s\n", name)
fmt.Printf(" status: %s\n", status)
fmt.Printf(" mode: %s\n", mode)
fmt.Printf(" version: %s\n", meta["version"])
if meta["description"] != "" {
fmt.Printf(" description: %s\n", meta["description"])
}
if p, err := envAppPortOrEmpty(envDB, name); err == nil && p != "" {
fmt.Printf(" port: %s\n", p)
}
if es := meta["ExecStart"]; es != "" {
fmt.Printf(" ExecStart: %s\n", es)
}
fmt.Printf(" image: %s (compressed)\n", humanSize(imageSize))
fmt.Printf(" db size: %s\n", humanSize(fi.Size()))
fmt.Printf(" db modified: %s\n", fi.ModTime().Format("2006-01-02 15:04:05"))
if lastActive != "" {
fmt.Printf(" last active: %s\n", lastActive)
}
fmt.Printf(" state dir: %s\n", filepath.Join(stateDir, name))
fmt.Println()
fmt.Println("_hosty_meta:")
for _, k := range metaKeys {
v := meta[k]
if v == "" {
v = "(empty)"
}
fmt.Printf(" %-14s %s\n", k, v)
}
// Config section — only shown if _hosty_config has rows.
cfgRows, err := db.Query(`
SELECT key, description, required, sensitive, default_val, value
FROM _hosty_config
ORDER BY required DESC, key
`)
if err == nil {
defer cfgRows.Close()
type cfgRow struct {
key string
desc string
required bool
sensitive bool
defaultVal sql.NullString
dataValue sql.NullString
}
var cfgEntries []cfgRow
for cfgRows.Next() {
var r cfgRow
var req, sens int
if err := cfgRows.Scan(&r.key, &r.desc, &req, &sens, &r.defaultVal, &r.dataValue); err != nil {
continue
}
r.required = req == 1
r.sensitive = sens == 1
cfgEntries = append(cfgEntries, r)
}
if len(cfgEntries) > 0 {
fmt.Println()
fmt.Println("config:")
tw := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
for _, e := range cfgEntries {
req := "optional"
if e.required {
req = "required"
}
var valStr string
if e.sensitive {
if _, err := envSecretOrMissing(envDB, name, e.key); err == nil {
valStr = "(set)"
} else if e.defaultVal.Valid {
valStr = "(default: " + e.defaultVal.String + ")"
} else {
valStr = "(unset)"
}
} else {
switch {
case e.dataValue.Valid:
valStr = e.dataValue.String
case e.defaultVal.Valid:
valStr = "(default: " + e.defaultVal.String + ")"
default:
valStr = "(unset)"
}
}
fmt.Fprintf(tw, " %s\t%s\t%s\t%s\n", e.key, req, valStr, e.desc)
}
tw.Flush()
}
}
return nil
}
// systemctlScope returns the manager-selecting argument list for the given mode:
// system-mode apps are units of the system manager, user-mode apps of the
// per-user one. Querying the wrong manager silently reports "unknown"/no logs.
func systemctlScope(system bool) []string {
if system {
return nil
}
return []string{"--user"}
}
// serviceStatus returns the ActiveState of a systemd service.
func serviceStatus(name string, system bool) string {
args := append(systemctlScope(system), "is-active", name+".service")
cmd := exec.Command("systemctl", args...)
out, _ := cmd.Output() // non-zero exit when not active; that's fine
s := strings.TrimSpace(string(out))
if s == "" {
return "unknown"
}
return s
}
// serviceLastActive returns a human-readable timestamp of the last journal
// entry for the service, or empty string if unavailable.
func serviceLastActive(name string, system bool) string {
args := append(systemctlScope(system), "-u", name+".service",
"-n", "1", "--output=json", "--no-pager")
cmd := exec.Command("journalctl", args...)
out, err := cmd.Output()
if err != nil || len(out) == 0 {
return ""
}
// Parse __REALTIME_TIMESTAMP (microseconds since Unix epoch) from JSON.
// We do a minimal parse rather than pulling in encoding/json for one field.
const needle = `"__REALTIME_TIMESTAMP":"`
s := string(out)
idx := strings.Index(s, needle)
if idx < 0 {
return ""
}
s = s[idx+len(needle):]
before, _, ok := strings.Cut(s, "\"")
if !ok {
return ""
}
usStr := before
us, err := strconv.ParseInt(usStr, 10, 64)
if err != nil {
return ""
}
t := time.Unix(us/1_000_000, (us%1_000_000)*1000)
return t.Format("2006-01-02 15:04:05")
}
// humanSize formats a byte count as a human-readable string.
func humanSize(b int64) string {
switch {
case b >= 1<<30:
return fmt.Sprintf("%.1fG", float64(b)/float64(1<<30))
case b >= 1<<20:
return fmt.Sprintf("%.1fM", float64(b)/float64(1<<20))
case b >= 1<<10:
return fmt.Sprintf("%.1fK", float64(b)/float64(1<<10))
default:
return fmt.Sprintf("%dB", b)
}
}
|