wizard: properly initialize configuration

The wizard constructs an AccountConfig object by hand without
initializing default values. This causes a crash when replying to an
email (rr) just after completing the account creation:

~/.config/aerc/aerc.conf not found, installing the system default~/.config/aerc/binds.conf not found, installing the system defaultpanic: runtime error: invalid memory address or nil pointer dereference [recovered]
         panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x90 pc=0x5d1550]

...
regexp.(*Regexp).doExecute(0x7fc1089aa108?, {0x0?, 0x0?}, {0x0?, 0x0?, 0xc000fe5408?}, {0xc000698120?, 0x10?}, 0xad3a40?, 0x2, ...)
         regexp/exec.go:527 +0x90
regexp.(*Regexp).FindString(0x44e372?, {0xc000698120, 0x27})
         regexp/regexp.go:852 +0x6c
git.sr.ht/~rjarry/aerc/commands/msg.trimLocalizedRe({0xc000698120, 0x27}, 0xc00003e420?)
         git.sr.ht/~rjarry/aerc/commands/msg/reply.go:332 +0x36
git.sr.ht/~rjarry/aerc/commands/msg.reply.Execute({}, 0xc0002ba180, {0xc0002f8800?, 0x2, 0x2})
         git.sr.ht/~rjarry/aerc/commands/msg/reply.go:157 +0x765
...

Extract the account parsing and initialization into a function. Reuse
that function in both accounts.conf parsing and the wizard.

Fixes: 40cc540357d9 ("reply: allow to override localized Re regexp in configuration")
Reported-by: Mechiel Lukkien <mechiel@ueber.net>
Signed-off-by: Robin Jarry <robin@jarry.cc>
Tested-by: Andrew Yu <andrew@andrewyu.org>

3 files changed, 53 insertions, 44 deletions

diff --git a/config/accounts.go b/config/accounts.go
index eec6ca44..a8c2b9bf 100644
--- a/config/accounts.go
+++ b/config/accounts.go
@@ -146,27 +146,11 @@ func parseAccounts(root string, accts []string) error {
 			continue
 		}
 		sec := file.Section(_sec)
-		account := AccountConfig{
-			Name:   _sec,
-			Params: make(map[string]string),
-		}
-		if err = MapToStruct(sec, &account, true); err != nil {
+
+		account, err := ParseAccountConfig(_sec, sec)
+		if err != nil {
 			return err
 		}
-		for key, val := range sec.KeysHash() {
-			backendSpecific := true
-			typ := reflect.TypeOf(account)
-			for i := 0; i < typ.NumField(); i++ {
-				field := typ.Field(i)
-				if field.Tag.Get("ini") == key {
-					backendSpecific = false
-					break
-				}
-			}
-			if backendSpecific {
-				account.Params[key] = val
-			}
-		}
 		if _, ok := account.Params["smtp-starttls"]; ok && !starttls_warned {
 			Warnings = append(Warnings, Warning{
 				Title: "accounts.conf: smtp-starttls is deprecated",
@@ -178,31 +162,9 @@ If you want to disable STARTTLS, append +insecure to the schema.
 			})
 			starttls_warned = true
 		}
-		if account.Source == "" {
-			return fmt.Errorf("Expected source for account %s", _sec)
-		}
-		if account.From == nil {
-			return fmt.Errorf("Expected from for account %s", _sec)
-		}
-		if len(account.Headers) > 0 {
-			defaults := []string{
-				"date",
-				"subject",
-				"from",
-				"sender",
-				"reply-to",
-				"to",
-				"cc",
-				"bcc",
-				"in-reply-to",
-				"message-id",
-				"references",
-			}
-			account.Headers = append(account.Headers, defaults...)
-		}
 
 		log.Debugf("accounts.conf: [%s] from = %s", account.Name, account.From)
-		Accounts = append(Accounts, &account)
+		Accounts = append(Accounts, account)
 	}
 	if len(accts) > 0 {
 		// Sort accounts struct to match the specified order, if we
@@ -218,6 +180,53 @@ If you want to disable STARTTLS, append +insecure to the schema.
 	return nil
 }
 
+func ParseAccountConfig(name string, section *ini.Section) (*AccountConfig, error) {
+	account := AccountConfig{
+		Name:   name,
+		Params: make(map[string]string),
+	}
+	if err := MapToStruct(section, &account, true); err != nil {
+		return nil, err
+	}
+	for key, val := range section.KeysHash() {
+		backendSpecific := true
+		typ := reflect.TypeOf(account)
+		for i := 0; i < typ.NumField(); i++ {
+			field := typ.Field(i)
+			if field.Tag.Get("ini") == key {
+				backendSpecific = false
+				break
+			}
+		}
+		if backendSpecific {
+			account.Params[key] = val
+		}
+	}
+	if account.Source == "" {
+		return nil, fmt.Errorf("Expected source for account %s", name)
+	}
+	if account.From == nil {
+		return nil, fmt.Errorf("Expected from for account %s", name)
+	}
+	if len(account.Headers) > 0 {
+		defaults := []string{
+			"date",
+			"subject",
+			"from",
+			"sender",
+			"reply-to",
+			"to",
+			"cc",
+			"bcc",
+			"in-reply-to",
+			"message-id",
+			"references",
+		}
+		account.Headers = append(account.Headers, defaults...)
+	}
+	return &account, nil
+}
+
 func (a *AccountConfig) ParseSource(sec *ini.Section, key *ini.Key) (string, error) {
 	var remote RemoteConfig
 	remote.Value = key.String()
diff --git a/config/binds.go b/config/binds.go
index 55814cd2..b219adad 100644
--- a/config/binds.go
+++ b/config/binds.go
@@ -101,7 +101,7 @@ var Binds = defaultBindsConfig()
 func parseBinds(root string) error {
 	filename := path.Join(root, "binds.conf")
 	if _, err := os.Stat(filename); errors.Is(err, os.ErrNotExist) {
-		fmt.Printf("%s not found, installing the system default", filename)
+		fmt.Printf("%s not found, installing the system default\n", filename)
 		if err := installTemplate(root, "binds.conf"); err != nil {
 			return err
 		}
diff --git a/config/config.go b/config/config.go
index d70bcfe0..4ace7d26 100644
--- a/config/config.go
+++ b/config/config.go
@@ -98,7 +98,7 @@ func LoadConfigFromFile(root *string, accts []string) error {
 
 	// if it doesn't exist copy over the template, then load
 	if _, err := os.Stat(filename); errors.Is(err, os.ErrNotExist) {
-		fmt.Printf("%s not found, installing the system default", filename)
+		fmt.Printf("%s not found, installing the system default\n", filename)
 		if err := installTemplate(*root, "aerc.conf"); err != nil {
 			return err
 		}