mail/compose: add configurable custom hooks with shell commands

Quoting the docs at meli.conf(5):

```text
 custom_compose_hooks [{ name = String, command = String }]

 (optional) Custom compose-hooks that run shell scripts.
 compose-hooks run before submitting an e-mail.
 They perform draft validation and/or transformations.
 If a custom hook exits with an error status or prints output to
 stdout and stderr, it will show up in the UI as a notification.

 Example:

 [composing]
 editor_cmd = '~/.local/bin/vim +/^$'
 embed = true
 custom_compose_hooks = [ { name ="spellcheck", command="aspell --mode email --dont-suggest --ignore-case list" }]
 ```

docs/meli.conf.5

@@ -613,6 +613,20 @@ When used in a reply, the field body MAY start with the string "Re: " (from
 the Latin "res", in the matter of) followed by the contents of the "Subject:"
 field body of the original message.
 .Ed
+.It Ic custom_compose_hooks Ar [{ name = String, command = String }]
+.Pq Em optional
+Custom compose-hooks that run shell scripts.
+compose-hooks run before submitting an e-mail.
+They perform draft validation and/or transformations.
+If a custom hook exits with an error status or prints output to stdout and stderr, it will show up in the UI as a notification.
+.Pp
+Example:
+.Bd -literal
+[composing]
+editor_cmd = '~/.local/bin/vim +/^$'
+embed = true
+custom_compose_hooks = [ { name ="spellcheck", command="aspell --mode email --dont-suggest --ignore-case list" }]
+.Ed
 .It Ic disabled_compose_hooks Ar [String]
 .Pq Em optional
 Disabled compose-hooks.

src/components/mail/compose.rs

@@ -183,6 +183,16 @@ impl Composer {
             account_hash,
             ..Composer::new(context)
         };
+
+        // Add user's custom hooks.
+        for hook in account_settings!(context[account_hash].composing.custom_compose_hooks)
+            .iter()
+            .cloned()
+            .map(Into::into)
+        {
+            ret.hooks.push(hook);
+        }
+
         ret.hooks.retain(|h| {
             !account_settings!(context[account_hash].composing.disabled_compose_hooks)
                 .iter()
@@ -216,6 +226,14 @@ impl Composer {
         context: &Context,
     ) -> Result<Self> {
         let mut ret = Composer::with_account(account_hash, context);
+        // Add user's custom hooks.
+        for hook in account_settings!(context[account_hash].composing.custom_compose_hooks)
+            .iter()
+            .cloned()
+            .map(Into::into)
+        {
+            ret.hooks.push(hook);
+        }
         ret.hooks.retain(|h| {
             !account_settings!(context[account_hash].composing.disabled_compose_hooks)
                 .iter()
@@ -236,6 +254,14 @@ impl Composer {
         reply_to_all: bool,
     ) -> Self {
         let mut ret = Composer::with_account(account_hash, context);
+        // Add user's custom hooks.
+        for hook in account_settings!(context[account_hash].composing.custom_compose_hooks)
+            .iter()
+            .cloned()
+            .map(Into::into)
+        {
+            ret.hooks.push(hook);
+        }
         ret.hooks.retain(|h| {
             !account_settings!(context[account_hash].composing.disabled_compose_hooks)
                 .iter()
@@ -524,15 +550,6 @@ To: {}
         }
     }
 
-    fn run_hooks(&mut self, ctx: &mut Context) -> Result<()> {
-        for h in self.hooks.iter_mut() {
-            if let err @ Err(_) = h(ctx, &mut self.draft) {
-                return err;
-            }
-        }
-        Ok(())
-    }
-
     fn update_form(&mut self) {
         let old_cursor = self.form.cursor();
         self.form = FormWidget::new(("Save".into(), true));
@@ -1438,10 +1455,31 @@ impl Component for Composer {
                     && self.mode.is_edit() =>
             {
                 self.update_draft();
-                if let Err(err) = self.run_hooks(context) {
-                    context
-                        .replies
-                        .push_back(UIEvent::Notification(None, err.to_string(), None));
+
+                {
+                    let Self {
+                        ref mut hooks,
+                        ref mut draft,
+                        ..
+                    } = self;
+
+                    for err in hooks
+                        .iter_mut()
+                        .filter_map(|h| {
+                            if let Err(err) = h(context, draft) {
+                                Some(err)
+                            } else {
+                                None
+                            }
+                        })
+                        .collect::<Vec<_>>()
+                    {
+                        context.replies.push_back(UIEvent::Notification(
+                            None,
+                            err.to_string(),
+                            None,
+                        ));
+                    }
                 }
                 self.mode = ViewMode::Send(UIConfirmationDialog::new(
                     "send mail?",

src/components/mail/compose/hooks.rs

@@ -24,7 +24,6 @@ pub use std::borrow::Cow;
 
 use super::*;
 
-/*
 pub enum HookFn {
     /// Stateful hook.
     Closure(Box<dyn FnMut(&mut Context, &mut Draft) -> Result<()> + Send + Sync>),
@@ -32,22 +31,49 @@ pub enum HookFn {
     /// Static hook.
     Ptr(fn(&mut Context, &mut Draft) -> Result<()>),
 }
-*/
 
+impl std::fmt::Debug for HookFn {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        f.debug_struct(stringify!(HookFn))
+            .field(
+                "kind",
+                &match self {
+                    Self::Closure(_) => "closure",
+                    Self::Ptr(_) => "function ptr",
+                },
+            )
+            .finish()
+    }
+}
+
+impl std::ops::Deref for HookFn {
+    type Target = dyn FnMut(&mut Context, &mut Draft) -> Result<()> + Send + Sync;
+
+    fn deref(&self) -> &Self::Target {
+        match self {
+            Self::Ptr(ref v) => v,
+            Self::Closure(ref v) => v,
+        }
+    }
+}
+
+impl std::ops::DerefMut for HookFn {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        match self {
+            Self::Ptr(ref mut v) => v,
+            Self::Closure(ref mut v) => v,
+        }
+    }
+}
+
+#[derive(Debug)]
 /// Pre-submission hook for draft validation and/or transformations.
 pub struct Hook {
     /// Hook name for enabling/disabling it from configuration.
     ///
     /// See [`ComposingSettings::disabled_compose_hooks`].
     name: Cow<'static, str>,
-    hook_fn: fn(&mut Context, &mut Draft) -> Result<()>,
-    //hook_fn: HookFn,
-}
-
-impl std::fmt::Debug for Hook {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        f.debug_struct(self.name.as_ref()).finish()
-    }
+    hook_fn: HookFn,
 }
 
 impl Hook {
@@ -57,19 +83,72 @@ impl Hook {
     pub fn name(&self) -> &str {
         self.name.as_ref()
     }
+
+    pub fn new_shell_command(name: Cow<'static, str>, command: String) -> Self {
+        let name_ = name.clone();
+        Self {
+            name,
+            hook_fn: HookFn::Closure(Box::new(move |_, draft| -> Result<()> {
+                use std::thread;
+
+                let mut child = Command::new("sh")
+                    .arg("-c")
+                    .arg(&command)
+                    .stdin(Stdio::piped())
+                    .stdout(Stdio::piped())
+                    .stderr(Stdio::piped())
+                    .spawn()
+                    .map_err(|err| -> Error {
+                        format!(
+                            "could not execute `{command}`. Check if its binary is in PATH or if \
+                             the command is valid. Original error: {err}"
+                        )
+                        .into()
+                    })?;
+                let mut stdin = child
+                    .stdin
+                    .take()
+                    .ok_or_else(|| Error::new("failed to get stdin"))?;
+
+                thread::scope(|s| {
+                    s.spawn(move || {
+                        stdin
+                            .write_all(draft.body.as_bytes())
+                            .expect("failed to write to stdin");
+                    });
+                });
+                let output = child.wait_with_output().map_err(|err| -> Error {
+                    format!("failed to wait on hook child {name_}: {err}").into()
+                })?;
+                let stdout = String::from_utf8_lossy(&output.stdout);
+                let stderr = String::from_utf8_lossy(&output.stderr);
+                if !output.status.success() || !stdout.is_empty() || !stderr.is_empty() {
+                    return Err(format!(
+                        "{name_}\n  exit code: {:?}\n  stdout:\n{}\n  stderr:\n{}",
+                        output.status.code(),
+                        stdout,
+                        stderr,
+                    )
+                    .into());
+                }
+
+                Ok(())
+            })),
+        }
+    }
 }
 
 impl std::ops::Deref for Hook {
     type Target = dyn FnMut(&mut Context, &mut Draft) -> Result<()> + Send + Sync;
 
     fn deref(&self) -> &Self::Target {
-        &self.hook_fn
+        self.hook_fn.deref()
     }
 }
 
 impl std::ops::DerefMut for Hook {
     fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.hook_fn
+        self.hook_fn.deref_mut()
     }
 }
 
@@ -98,7 +177,7 @@ fn past_date_warn(_ctx: &mut Context, draft: &mut Draft) -> Result<()> {
 /// Warn if [`melib::Draft`] Date is far in the past/future.
 pub const PASTDATEWARN: Hook = Hook {
     name: Cow::Borrowed("past-date-warn"),
-    hook_fn: past_date_warn,
+    hook_fn: HookFn::Ptr(past_date_warn),
 };
 
 fn important_header_warn(_ctx: &mut Context, draft: &mut Draft) -> Result<()> {
@@ -138,7 +217,7 @@ fn important_header_warn(_ctx: &mut Context, draft: &mut Draft) -> Result<()> {
 /// Warn if important [`melib::Draft`] header is missing or invalid.
 pub const HEADERWARN: Hook = Hook {
     name: Cow::Borrowed("important-header-warn"),
-    hook_fn: important_header_warn,
+    hook_fn: HookFn::Ptr(important_header_warn),
 };
 
 fn missing_attachment_warn(_ctx: &mut Context, draft: &mut Draft) -> Result<()> {
@@ -162,7 +241,7 @@ fn missing_attachment_warn(_ctx: &mut Context, draft: &mut Draft) -> Result<()>
 /// Warn if Subject and/or draft body mentions attachments but they are missing.
 pub const MISSINGATTACHMENTWARN: Hook = Hook {
     name: Cow::Borrowed("missing-attachment-warn"),
-    hook_fn: missing_attachment_warn,
+    hook_fn: HookFn::Ptr(missing_attachment_warn),
 };
 
 fn empty_draft_warn(_ctx: &mut Context, draft: &mut Draft) -> Result<()> {
@@ -182,7 +261,7 @@ fn empty_draft_warn(_ctx: &mut Context, draft: &mut Draft) -> Result<()> {
 /// Warn if draft has no subject and no body.
 pub const EMPTYDRAFTWARN: Hook = Hook {
     name: Cow::Borrowed("empty-draft-warn"),
-    hook_fn: empty_draft_warn,
+    hook_fn: HookFn::Ptr(empty_draft_warn),
 };
 
 #[cfg(test)]

src/conf.rs

@@ -34,7 +34,7 @@ use std::{
 
 use melib::{backends::TagHash, search::Query, StderrLogger};
 
-use crate::{conf::deserializers::non_empty_string, terminal::Color};
+use crate::{conf::deserializers::non_empty_opt_string, terminal::Color};
 
 #[rustfmt::skip]
 mod overrides;
@@ -729,8 +729,9 @@ mod default_vals {
 }
 
 mod deserializers {
-    use serde::{Deserialize, Deserializer};
-    pub(in crate::conf) fn non_empty_string<'de, D, T: std::convert::From<Option<String>>>(
+    use serde::{de, Deserialize, Deserializer};
+
+    pub(in crate::conf) fn non_empty_opt_string<'de, D, T: std::convert::From<Option<String>>>(
         deserializer: D,
     ) -> std::result::Result<T, D::Error>
     where
@@ -744,6 +745,20 @@ mod deserializers {
         }
     }
 
+    pub(in crate::conf) fn non_empty_string<'de, D, T: std::convert::From<String>>(
+        deserializer: D,
+    ) -> std::result::Result<T, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let s = <String>::deserialize(deserializer)?;
+        if s.is_empty() {
+            Err(de::Error::custom("This field value cannot be empty."))
+        } else {
+            Ok(s.into())
+        }
+    }
+
     use toml::Value;
     fn any_of<'de, D>(deserializer: D) -> std::result::Result<String, D::Error>
     where

src/conf/composing.rs

@@ -24,7 +24,10 @@ use std::collections::HashMap;
 
 use melib::ToggleFlag;
 
-use super::default_vals::{ask, false_val, none, true_val};
+use super::{
+    default_vals::{ask, false_val, none, true_val},
+    deserializers::non_empty_string,
+};
 
 /// Settings for writing and sending new e-mail
 #[derive(Debug, Serialize, Deserialize, Clone)]
@@ -100,6 +103,9 @@ pub struct ComposingSettings {
     /// The prefix to use in reply subjects. The de facto prefix is "Re:".
     #[serde(default = "res", alias = "reply-prefix")]
     pub reply_prefix: String,
+    /// Custom `compose-hooks`.
+    #[serde(default, alias = "custom-compose-hooks")]
+    pub custom_compose_hooks: Vec<ComposeHook>,
     /// Disabled `compose-hooks`.
     #[serde(default, alias = "disabled-compose-hooks")]
     pub disabled_compose_hooks: Vec<String>,
@@ -121,6 +127,7 @@ impl Default for ComposingSettings {
             forward_as_attachment: ToggleFlag::Ask,
             reply_prefix_list_to_strip: None,
             reply_prefix: res(),
+            custom_compose_hooks: vec![],
             disabled_compose_hooks: vec![],
         }
     }
@@ -177,3 +184,19 @@ pub enum SendMail {
     ServerSubmission,
     ShellCommand(String),
 }
+
+/// Shell command compose hooks (See [`Hook`])
+#[derive(Debug, Serialize, Deserialize, Clone)]
+#[serde(deny_unknown_fields)]
+pub struct ComposeHook {
+    #[serde(deserialize_with = "non_empty_string")]
+    name: String,
+    #[serde(deserialize_with = "non_empty_string")]
+    command: String,
+}
+
+impl From<ComposeHook> for crate::components::mail::hooks::Hook {
+    fn from(c: ComposeHook) -> Self {
+        Self::new_shell_command(c.name.into(), c.command)
+    }
+}

src/conf/overrides.rs

@@ -25,7 +25,7 @@
 //! This module is automatically generated by config_macros.rs.
 use super::*;
 
-# [derive (Debug , Serialize , Deserialize , Clone)] # [serde (deny_unknown_fields)] pub struct PagerSettingsOverride { # [doc = " Number of context lines when going to next page."] # [doc = " Default: 0"] # [serde (alias = "pager-context")] # [serde (default)] pub pager_context : Option < usize > , # [doc = " Stop at the end instead of displaying next mail."] # [doc = " Default: false"] # [serde (alias = "pager-stop")] # [serde (default)] pub pager_stop : Option < bool > , # [doc = " Always show headers when scrolling."] # [doc = " Default: true"] # [serde (alias = "headers-sticky")] # [serde (default)] pub headers_sticky : Option < bool > , # [doc = " The height of the pager in mail view, in percent."] # [doc = " Default: 80"] # [serde (alias = "pager-ratio")] # [serde (default)] pub pager_ratio : Option < usize > , # [doc = " A command to pipe mail output through for viewing in pager."] # [doc = " Default: None"] # [serde (deserialize_with = "non_empty_string")] # [serde (default)] pub filter : Option < Option < String > > , # [doc = " A command to pipe html output before displaying it in a pager"] # [doc = " Default: None"] # [serde (deserialize_with = "non_empty_string" , alias = "html-filter")] # [serde (default)] pub html_filter : Option < Option < String > > , # [doc = " Respect \"format=flowed\""] # [doc = " Default: true"] # [serde (alias = "format-flowed")] # [serde (default)] pub format_flowed : Option < bool > , # [doc = " Split long lines that would overflow on the x axis."] # [doc = " Default: true"] # [serde (alias = "split-long-lines")] # [serde (default)] pub split_long_lines : Option < bool > , # [doc = " Minimum text width in columns."] # [doc = " Default: 80"] # [serde (alias = "minimum-width")] # [serde (default)] pub minimum_width : Option < usize > , # [doc = " Choose `text/html` alternative if `text/plain` is empty in"] # [doc = " `multipart/alternative` attachments."] # [doc = " Default: true"] # [serde (alias = "auto-choose-multipart-alternative")] # [serde (default)] pub auto_choose_multipart_alternative : Option < ToggleFlag > , # [doc = " Show Date: in my timezone"] # [doc = " Default: true"] # [serde (alias = "show-date-in-my-timezone")] # [serde (default)] pub show_date_in_my_timezone : Option < ToggleFlag > , # [doc = " A command to launch URLs with. The URL will be given as the first"] # [doc = " argument of the command. Default: None"] # [serde (deserialize_with = "non_empty_string")] # [serde (default)] pub url_launcher : Option < Option < String > > , # [doc = " A command to open html files."] # [doc = " Default: None"] # [serde (deserialize_with = "non_empty_string" , alias = "html-open")] # [serde (default)] pub html_open : Option < Option < String > > } impl Default for PagerSettingsOverride { fn default () -> Self { PagerSettingsOverride { pager_context : None , pager_stop : None , headers_sticky : None , pager_ratio : None , filter : None , html_filter : None , format_flowed : None , split_long_lines : None , minimum_width : None , auto_choose_multipart_alternative : None , show_date_in_my_timezone : None , url_launcher : None , html_open : None } } }
+# [derive (Debug , Serialize , Deserialize , Clone)] # [serde (deny_unknown_fields)] pub struct PagerSettingsOverride { # [doc = " Number of context lines when going to next page."] # [doc = " Default: 0"] # [serde (alias = "pager-context")] # [serde (default)] pub pager_context : Option < usize > , # [doc = " Stop at the end instead of displaying next mail."] # [doc = " Default: false"] # [serde (alias = "pager-stop")] # [serde (default)] pub pager_stop : Option < bool > , # [doc = " Always show headers when scrolling."] # [doc = " Default: true"] # [serde (alias = "headers-sticky")] # [serde (default)] pub headers_sticky : Option < bool > , # [doc = " The height of the pager in mail view, in percent."] # [doc = " Default: 80"] # [serde (alias = "pager-ratio")] # [serde (default)] pub pager_ratio : Option < usize > , # [doc = " A command to pipe mail output through for viewing in pager."] # [doc = " Default: None"] # [serde (deserialize_with = "non_empty_opt_string")] # [serde (default)] pub filter : Option < Option < String > > , # [doc = " A command to pipe html output before displaying it in a pager"] # [doc = " Default: None"] # [serde (deserialize_with = "non_empty_opt_string" , alias = "html-filter")] # [serde (default)] pub html_filter : Option < Option < String > > , # [doc = " Respect \"format=flowed\""] # [doc = " Default: true"] # [serde (alias = "format-flowed")] # [serde (default)] pub format_flowed : Option < bool > , # [doc = " Split long lines that would overflow on the x axis."] # [doc = " Default: true"] # [serde (alias = "split-long-lines")] # [serde (default)] pub split_long_lines : Option < bool > , # [doc = " Minimum text width in columns."] # [doc = " Default: 80"] # [serde (alias = "minimum-width")] # [serde (default)] pub minimum_width : Option < usize > , # [doc = " Choose `text/html` alternative if `text/plain` is empty in"] # [doc = " `multipart/alternative` attachments."] # [doc = " Default: true"] # [serde (alias = "auto-choose-multipart-alternative")] # [serde (default)] pub auto_choose_multipart_alternative : Option < ToggleFlag > , # [doc = " Show Date: in my timezone"] # [doc = " Default: true"] # [serde (alias = "show-date-in-my-timezone")] # [serde (default)] pub show_date_in_my_timezone : Option < ToggleFlag > , # [doc = " A command to launch URLs with. The URL will be given as the first"] # [doc = " argument of the command. Default: None"] # [serde (deserialize_with = "non_empty_opt_string")] # [serde (default)] pub url_launcher : Option < Option < String > > , # [doc = " A command to open html files."] # [doc = " Default: None"] # [serde (deserialize_with = "non_empty_opt_string" , alias = "html-open")] # [serde (default)] pub html_open : Option < Option < String > > } impl Default for PagerSettingsOverride { fn default () -> Self { PagerSettingsOverride { pager_context : None , pager_stop : None , headers_sticky : None , pager_ratio : None , filter : None , html_filter : None , format_flowed : None , split_long_lines : None , minimum_width : None , auto_choose_multipart_alternative : None , show_date_in_my_timezone : None , url_launcher : None , html_open : None } } }
 
 # [derive (Debug , Serialize , Deserialize , Clone)] # [serde (deny_unknown_fields)] pub struct ListingSettingsOverride { # [doc = " Number of context lines when going to next page."] # [doc = " Default: 0"] # [serde (alias = "context-lines")] # [serde (default)] pub context_lines : Option < usize > , # [doc = "Show auto-hiding scrollbar in accounts sidebar menu."] # [doc = "Default: True"] # [serde (default)] pub show_menu_scrollbar : Option < bool > , # [doc = " Datetime formatting passed verbatim to strftime(3)."] # [doc = " Default: %Y-%m-%d %T"] # [serde (alias = "datetime-fmt")] # [serde (default)] pub datetime_fmt : Option < Option < String > > , # [doc = " Show recent dates as `X {minutes,hours,days} ago`, up to 7 days."] # [doc = " Default: true"] # [serde (alias = "recent-dates")] # [serde (default)] pub recent_dates : Option < bool > , # [doc = " Show only envelopes that match this query"] # [doc = " Default: None"] # [serde (default)] pub filter : Option < Option < Query > > , # [serde (alias = "index-style")] # [serde (default)] pub index_style : Option < IndexStyle > , # [doc = "Default: \" \""] # [serde (default)] pub sidebar_mailbox_tree_has_sibling : Option < Option < String > > , # [doc = "Default: \" \""] # [serde (default)] pub sidebar_mailbox_tree_no_sibling : Option < Option < String > > , # [doc = "Default: \" \""] # [serde (default)] pub sidebar_mailbox_tree_has_sibling_leaf : Option < Option < String > > , # [doc = "Default: \" \""] # [serde (default)] pub sidebar_mailbox_tree_no_sibling_leaf : Option < Option < String > > , # [doc = "Default: ' '"] # [serde (default)] pub sidebar_divider : Option < char > , # [doc = "Default: 90"] # [serde (default)] pub sidebar_ratio : Option < usize > , # [doc = " Flag to show if thread entry contains unseen mail."] # [doc = " Default: \"●\""] # [serde (default)] pub unseen_flag : Option < Option < String > > , # [doc = " Flag to show if thread has been snoozed."] # [doc = " Default: \"💤\""] # [serde (default)] pub thread_snoozed_flag : Option < Option < String > > , # [doc = " Flag to show if thread entry has been selected."] # [doc = " Default: \"☑\u{fe0f}\""] # [serde (default)] pub selected_flag : Option < Option < String > > , # [doc = " Flag to show if thread entry contains attachments."] # [doc = " Default: \"📎\""] # [serde (default)] pub attachment_flag : Option < Option < String > > , # [doc = " Should threads with differentiating Subjects show a list of those"] # [doc = " subjects on the entry title?"] # [doc = " Default: \"true\""] # [serde (default)] pub thread_subject_pack : Option < bool > } impl Default for ListingSettingsOverride { fn default () -> Self { ListingSettingsOverride { context_lines : None , show_menu_scrollbar : None , datetime_fmt : None , recent_dates : None , filter : None , index_style : None , sidebar_mailbox_tree_has_sibling : None , sidebar_mailbox_tree_no_sibling : None , sidebar_mailbox_tree_has_sibling_leaf : None , sidebar_mailbox_tree_no_sibling_leaf : None , sidebar_divider : None , sidebar_ratio : None , unseen_flag : None , thread_snoozed_flag : None , selected_flag : None , attachment_flag : None , thread_subject_pack : None } } }
 
@@ -33,7 +33,7 @@ use super::*;
 
 # [derive (Debug , Serialize , Deserialize , Clone)] # [serde (deny_unknown_fields)] pub struct ShortcutsOverride { # [serde (default)] pub general : Option < GeneralShortcuts > , # [serde (default)] pub listing : Option < ListingShortcuts > , # [serde (default)] pub composing : Option < ComposingShortcuts > , # [serde (alias = "contact-list")] # [serde (default)] pub contact_list : Option < ContactListShortcuts > , # [serde (alias = "envelope-view")] # [serde (default)] pub envelope_view : Option < EnvelopeViewShortcuts > , # [serde (alias = "thread-view")] # [serde (default)] pub thread_view : Option < ThreadViewShortcuts > , # [serde (default)] pub pager : Option < PagerShortcuts > } impl Default for ShortcutsOverride { fn default () -> Self { ShortcutsOverride { general : None , listing : None , composing : None , contact_list : None , envelope_view : None , thread_view : None , pager : None } } }
 
-# [derive (Debug , Serialize , Deserialize , Clone)] # [serde (deny_unknown_fields)] pub struct ComposingSettingsOverride { # [doc = " A command to pipe new emails to"] # [doc = " Required"] # [serde (default)] pub send_mail : Option < SendMail > , # [doc = " Command to launch editor. Can have arguments. Draft filename is given as"] # [doc = " the last argument. If it's missing, the environment variable $EDITOR is"] # [doc = " looked up."] # [serde (alias = "editor-command" , alias = "editor-cmd" , alias = "editor_cmd")] # [serde (default)] pub editor_command : Option < Option < String > > , # [doc = " Embed editor (for terminal interfaces) instead of forking and waiting."] # [serde (default)] pub embed : Option < bool > , # [doc = " Set \"format=flowed\" in plain text attachments."] # [doc = " Default: true"] # [serde (alias = "format-flowed")] # [serde (default)] pub format_flowed : Option < bool > , # [doc = "Set User-Agent"] # [doc = "Default: empty"] # [serde (alias = "insert_user_agent")] # [serde (default)] pub insert_user_agent : Option < bool > , # [doc = " Set default header values for new drafts"] # [doc = " Default: empty"] # [serde (alias = "default-header-values")] # [serde (default)] pub default_header_values : Option < HashMap < String , String > > , # [doc = " Wrap header preample when editing a draft in an editor. This allows you"] # [doc = " to write non-plain text email without the preamble creating syntax"] # [doc = " errors. They are stripped when you return from the editor. The"] # [doc = " values should be a two element array of strings, a prefix and suffix."] # [doc = " Default: None"] # [serde (alias = "wrap-header-preample")] # [serde (default)] pub wrap_header_preamble : Option < Option < (String , String) > > , # [doc = " Store sent mail after successful submission. This setting is meant to be"] # [doc = " disabled for non-standard behaviour in gmail, which auto-saves sent"] # [doc = " mail on its own. Default: true"] # [serde (default)] pub store_sent_mail : Option < bool > , # [doc = " The attribution line appears above the quoted reply text."] # [doc = " The format specifiers for the replied address are:"] # [doc = " - `%+f` — the sender's name and email address."] # [doc = " - `%+n` — the sender's name (or email address, if no name is included)."] # [doc = " - `%+a` — the sender's email address."] # [doc = " The format string is passed to strftime(3) with the replied envelope's"] # [doc = " date. Default: \"On %a, %0e %b %Y %H:%M, %+f wrote:%n\""] # [serde (default)] pub attribution_format_string : Option < Option < String > > , # [doc = " Whether the strftime call for the attribution string uses the POSIX"] # [doc = " locale instead of the user's active locale"] # [doc = " Default: true"] # [serde (default)] pub attribution_use_posix_locale : Option < bool > , # [doc = " Forward emails as attachment? (Alternative is inline)"] # [doc = " Default: ask"] # [serde (alias = "forward-as-attachment")] # [serde (default)] pub forward_as_attachment : Option < ToggleFlag > , # [doc = " Alternative lists of reply prefixes (etc. [\"Re:\", \"RE:\", ...]) to strip"] # [doc = " Default: `[\"Re:\", \"RE:\", \"Fwd:\", \"Fw:\", \"回复:\", \"回覆:\", \"SV:\", \"Sv:\","] # [doc = " \"VS:\", \"Antw:\", \"Doorst:\", \"VS:\", \"VL:\", \"REF:\", \"TR:\", \"TR:\", \"AW:\","] # [doc = " \"WG:\", \"ΑΠ:\", \"Απ:\", \"απ:\", \"ΠΡΘ:\", \"Πρθ:\", \"πρθ:\", \"ΣΧΕΤ:\", \"Σχετ:\","] # [doc = " \"σχετ:\", \"ΠΡΘ:\", \"Πρθ:\", \"πρθ:\", \"Vá:\", \"Továbbítás:\", \"R:\", \"I:\","] # [doc = " \"RIF:\", \"FS:\", \"BLS:\", \"TRS:\", \"VS:\", \"VB:\", \"RV:\", \"RES:\", \"Res\","] # [doc = " \"ENC:\", \"Odp:\", \"PD:\", \"YNT:\", \"İLT:\", \"ATB:\", \"YML:\"]`"] # [serde (alias = "reply-prefix-list-to-strip")] # [serde (default)] pub reply_prefix_list_to_strip : Option < Option < Vec < String > > > , # [doc = " The prefix to use in reply subjects. The de facto prefix is \"Re:\"."] # [serde (alias = "reply-prefix")] # [serde (default)] pub reply_prefix : Option < String > , # [doc = " Disabled `compose-hooks`."] # [serde (alias = "disabled-compose-hooks")] # [serde (default)] pub disabled_compose_hooks : Option < Vec < String > > } impl Default for ComposingSettingsOverride { fn default () -> Self { ComposingSettingsOverride { send_mail : None , editor_command : None , embed : None , format_flowed : None , insert_user_agent : None , default_header_values : None , wrap_header_preamble : None , store_sent_mail : None , attribution_format_string : None , attribution_use_posix_locale : None , forward_as_attachment : None , reply_prefix_list_to_strip : None , reply_prefix : None , disabled_compose_hooks : None } } }
+# [derive (Debug , Serialize , Deserialize , Clone)] # [serde (deny_unknown_fields)] pub struct ComposingSettingsOverride { # [doc = " A command to pipe new emails to"] # [doc = " Required"] # [serde (default)] pub send_mail : Option < SendMail > , # [doc = " Command to launch editor. Can have arguments. Draft filename is given as"] # [doc = " the last argument. If it's missing, the environment variable $EDITOR is"] # [doc = " looked up."] # [serde (alias = "editor-command" , alias = "editor-cmd" , alias = "editor_cmd")] # [serde (default)] pub editor_command : Option < Option < String > > , # [doc = " Embed editor (for terminal interfaces) instead of forking and waiting."] # [serde (default)] pub embed : Option < bool > , # [doc = " Set \"format=flowed\" in plain text attachments."] # [doc = " Default: true"] # [serde (alias = "format-flowed")] # [serde (default)] pub format_flowed : Option < bool > , # [doc = "Set User-Agent"] # [doc = "Default: empty"] # [serde (alias = "insert_user_agent")] # [serde (default)] pub insert_user_agent : Option < bool > , # [doc = " Set default header values for new drafts"] # [doc = " Default: empty"] # [serde (alias = "default-header-values")] # [serde (default)] pub default_header_values : Option < HashMap < String , String > > , # [doc = " Wrap header preample when editing a draft in an editor. This allows you"] # [doc = " to write non-plain text email without the preamble creating syntax"] # [doc = " errors. They are stripped when you return from the editor. The"] # [doc = " values should be a two element array of strings, a prefix and suffix."] # [doc = " Default: None"] # [serde (alias = "wrap-header-preample")] # [serde (default)] pub wrap_header_preamble : Option < Option < (String , String) > > , # [doc = " Store sent mail after successful submission. This setting is meant to be"] # [doc = " disabled for non-standard behaviour in gmail, which auto-saves sent"] # [doc = " mail on its own. Default: true"] # [serde (default)] pub store_sent_mail : Option < bool > , # [doc = " The attribution line appears above the quoted reply text."] # [doc = " The format specifiers for the replied address are:"] # [doc = " - `%+f` — the sender's name and email address."] # [doc = " - `%+n` — the sender's name (or email address, if no name is included)."] # [doc = " - `%+a` — the sender's email address."] # [doc = " The format string is passed to strftime(3) with the replied envelope's"] # [doc = " date. Default: \"On %a, %0e %b %Y %H:%M, %+f wrote:%n\""] # [serde (default)] pub attribution_format_string : Option < Option < String > > , # [doc = " Whether the strftime call for the attribution string uses the POSIX"] # [doc = " locale instead of the user's active locale"] # [doc = " Default: true"] # [serde (default)] pub attribution_use_posix_locale : Option < bool > , # [doc = " Forward emails as attachment? (Alternative is inline)"] # [doc = " Default: ask"] # [serde (alias = "forward-as-attachment")] # [serde (default)] pub forward_as_attachment : Option < ToggleFlag > , # [doc = " Alternative lists of reply prefixes (etc. [\"Re:\", \"RE:\", ...]) to strip"] # [doc = " Default: `[\"Re:\", \"RE:\", \"Fwd:\", \"Fw:\", \"回复:\", \"回覆:\", \"SV:\", \"Sv:\","] # [doc = " \"VS:\", \"Antw:\", \"Doorst:\", \"VS:\", \"VL:\", \"REF:\", \"TR:\", \"TR:\", \"AW:\","] # [doc = " \"WG:\", \"ΑΠ:\", \"Απ:\", \"απ:\", \"ΠΡΘ:\", \"Πρθ:\", \"πρθ:\", \"ΣΧΕΤ:\", \"Σχετ:\","] # [doc = " \"σχετ:\", \"ΠΡΘ:\", \"Πρθ:\", \"πρθ:\", \"Vá:\", \"Továbbítás:\", \"R:\", \"I:\","] # [doc = " \"RIF:\", \"FS:\", \"BLS:\", \"TRS:\", \"VS:\", \"VB:\", \"RV:\", \"RES:\", \"Res\","] # [doc = " \"ENC:\", \"Odp:\", \"PD:\", \"YNT:\", \"İLT:\", \"ATB:\", \"YML:\"]`"] # [serde (alias = "reply-prefix-list-to-strip")] # [serde (default)] pub reply_prefix_list_to_strip : Option < Option < Vec < String > > > , # [doc = " The prefix to use in reply subjects. The de facto prefix is \"Re:\"."] # [serde (alias = "reply-prefix")] # [serde (default)] pub reply_prefix : Option < String > , # [doc = " Custom `compose-hooks`."] # [serde (alias = "custom-compose-hooks")] # [serde (default)] pub custom_compose_hooks : Option < Vec < ComposeHook > > , # [doc = " Disabled `compose-hooks`."] # [serde (alias = "disabled-compose-hooks")] # [serde (default)] pub disabled_compose_hooks : Option < Vec < String > > } impl Default for ComposingSettingsOverride { fn default () -> Self { ComposingSettingsOverride { send_mail : None , editor_command : None , embed : None , format_flowed : None , insert_user_agent : None , default_header_values : None , wrap_header_preamble : None , store_sent_mail : None , attribution_format_string : None , attribution_use_posix_locale : None , forward_as_attachment : None , reply_prefix_list_to_strip : None , reply_prefix : None , custom_compose_hooks : None , disabled_compose_hooks : None } } }
 
 # [derive (Debug , Serialize , Deserialize , Clone)] # [serde (deny_unknown_fields)] pub struct TagsSettingsOverride { # [serde (deserialize_with = "tag_color_de")] # [serde (default)] pub colors : Option < HashMap < TagHash , Color > > , # [serde (deserialize_with = "tag_set_de" , alias = "ignore-tags")] # [serde (default)] pub ignore_tags : Option < HashSet < TagHash > > } impl Default for TagsSettingsOverride { fn default () -> Self { TagsSettingsOverride { colors : None , ignore_tags : None } } }
 

src/conf/pager.rs

@@ -51,14 +51,14 @@ pub struct PagerSettings {
 
     /// A command to pipe mail output through for viewing in pager.
     /// Default: None
-    #[serde(default = "none", deserialize_with = "non_empty_string")]
+    #[serde(default = "none", deserialize_with = "non_empty_opt_string")]
     pub filter: Option<String>,
 
     /// A command to pipe html output before displaying it in a pager
     /// Default: None
     #[serde(
         default = "none",
-        deserialize_with = "non_empty_string",
+        deserialize_with = "non_empty_opt_string",
         alias = "html-filter"
     )]
     pub html_filter: Option<String>,
@@ -94,14 +94,14 @@ pub struct PagerSettings {
 
     /// A command to launch URLs with. The URL will be given as the first
     /// argument of the command. Default: None
-    #[serde(default = "none", deserialize_with = "non_empty_string")]
+    #[serde(default = "none", deserialize_with = "non_empty_opt_string")]
     pub url_launcher: Option<String>,
 
     /// A command to open html files.
     /// Default: None
     #[serde(
         default = "none",
-        deserialize_with = "non_empty_string",
+        deserialize_with = "non_empty_opt_string",
         alias = "html-open"
     )]
     pub html_open: Option<String>,

src/conf/terminal.rs

@@ -23,7 +23,7 @@
 
 use melib::{Error, Result, ToggleFlag};
 
-use super::{deserializers::non_empty_string, DotAddressable, Themes};
+use super::{deserializers::non_empty_opt_string, DotAddressable, Themes};
 
 /// Settings for terminal display
 #[derive(Debug, Deserialize, Clone, Serialize)]
@@ -40,11 +40,11 @@ pub struct TerminalSettings {
     pub use_mouse: ToggleFlag,
     /// String to show in status bar if mouse is active.
     /// Default: "🖱️ "
-    #[serde(deserialize_with = "non_empty_string")]
+    #[serde(deserialize_with = "non_empty_opt_string")]
     pub mouse_flag: Option<String>,
-    #[serde(deserialize_with = "non_empty_string")]
+    #[serde(deserialize_with = "non_empty_opt_string")]
     pub window_title: Option<String>,
-    #[serde(deserialize_with = "non_empty_string")]
+    #[serde(deserialize_with = "non_empty_opt_string")]
     pub file_picker_command: Option<String>,
     /// Choose between 30-something built in sequences (integers between 0-30)
     /// or define your own list of strings for the progress spinner