add "mox config account list", printing all accounts and whether they are disabled

based on question from wisse on slack

ctl.go

@@ -15,6 +15,7 @@ import (
 	"os"
 	"path/filepath"
 	"runtime/debug"
+	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -33,7 +34,6 @@ import (
 	"github.com/mjl-/mox/smtp"
 	"github.com/mjl-/mox/store"
 	"github.com/mjl-/mox/webapi"
-	"slices"
 )
 
 // ctl represents a connection to the ctl unix domain socket of a running mox instance.
@@ -1056,6 +1056,25 @@ func servectlcmd(ctx context.Context, xctl *ctl, cid int64, shutdown func()) {
 		xctl.xcheck(err, "removing account")
 		xctl.xwriteok()
 
+	case "accountlist":
+		/* protocol:
+		> "accountlist"
+		< "ok" or error
+		< stream
+		*/
+		xctl.xwriteok()
+		xw := xctl.writer()
+		all, disabled := mox.Conf.AccountsDisabled()
+		slices.Sort(all)
+		for _, account := range all {
+			var extra string
+			if slices.Contains(disabled, account) {
+				extra += "\t(disabled)"
+			}
+			fmt.Fprintf(xw, "%s%s\n", account, extra)
+		}
+		xw.xclose()
+
 	case "accountdisabled":
 		/* protocol:
 		> "accountdisabled"

ctl_test.go

@@ -305,6 +305,12 @@ func TestCtl(t *testing.T) {
 	testctl(func(xctl *ctl) {
 		ctlcmdConfigAccountDisabled(xctl, "mjl2", "testing")
 	})
+
+	// "accountlist"
+	testctl(func(xctl *ctl) {
+		ctlcmdConfigAccountList(xctl)
+	})
+
 	testctl(func(xctl *ctl) {
 		ctlcmdConfigAccountDisabled(xctl, "mjl2", "")
 	})

doc.go

@@ -63,6 +63,7 @@ any parameters. Followed by the help and usage information for each command.
 	mox config dnsrecords domain
 	mox config describe-domains >domains.conf
 	mox config describe-static >mox.conf
+	mox config account list
 	mox config account add account address
 	mox config account rm account
 	mox config account disable account message
@@ -953,6 +954,15 @@ may contain unfinished list items.
 
 	usage: mox config describe-static >mox.conf
 
+# mox config account list
+
+List all accounts.
+
+Each account is printed on a line, with optional additional tab-separated
+information, such as "(disabled)".
+
+	usage: mox config account list
+
 # mox config account add
 
 Add an account with an email address and reload the configuration.

main.go

@@ -145,6 +145,7 @@ var commands = []struct {
 	{"config dnsrecords", cmdConfigDNSRecords},
 	{"config describe-domains", cmdConfigDescribeDomains},
 	{"config describe-static", cmdConfigDescribeStatic},
+	{"config account list", cmdConfigAccountList},
 	{"config account add", cmdConfigAccountAdd},
 	{"config account rm", cmdConfigAccountRemove},
 	{"config account disable", cmdConfigAccountDisable},
@@ -996,6 +997,27 @@ func ctlcmdConfigAccountRemove(ctl *ctl, account string) {
 	fmt.Println("account removed")
 }
 
+func cmdConfigAccountList(c *cmd) {
+	c.help = `List all accounts.
+
+Each account is printed on a line, with optional additional tab-separated
+information, such as "(disabled)".
+`
+	args := c.Parse()
+	if len(args) != 0 {
+		c.Usage()
+	}
+
+	mustLoadConfig()
+	ctlcmdConfigAccountList(xctl())
+}
+
+func ctlcmdConfigAccountList(ctl *ctl) {
+	ctl.xwrite("accountlist")
+	ctl.xreadok()
+	ctl.xstreamto(os.Stdout)
+}
+
 func cmdConfigAccountDisable(c *cmd) {
 	c.params = "account message"
 	c.help = `Disable login for an account, showing message to users when they try to login.