#94 - new option --keep-tags (-k) to edit only subject

src/conf.rs

@@ -63,6 +63,7 @@ pub struct Conf {
     pub todo_file: PathBuf,
     pub done_file: PathBuf,
     pub keep_empty: bool,
+    pub keep_tags: bool,
 
     pub auto_hide_columns: bool,
     pub auto_show_columns: bool,
@@ -91,6 +92,7 @@ impl Default for Conf {
             todo_file: PathBuf::from(TODO_FILE),
             done_file: PathBuf::from(""),
             keep_empty: false,
+            keep_tags: false,
 
             auto_hide_columns: false,
             auto_show_columns: false,
@@ -1205,6 +1207,7 @@ pub fn parse_args(args: &[String]) -> Result<Conf> {
         "what to do with priority on task completion: keep - no special action(default behavior), move - place priority after completion date, tag - convert priority to a tag 'pri:', erase - remove priority. Notethat in all modes, except `erase`, the operation is reversible and on task uncompleting, the task gets its priority back",
         "VALUE",
     );
+    opts.optflag("k", "keep-tags", "in edit mode a new subject replaces regular text of the todo, everything else(tags, priority etc) is taken from the old and appended to the new subject. A convenient way to replace just text and keep all the tags without typing the tags again");
 
     let matches: Matches = match opts.parse(&args[1..]) {
         Ok(m) => m,
@@ -1287,6 +1290,7 @@ pub fn parse_args(args: &[String]) -> Result<Conf> {
 
     let soon_days = conf.fmt.colors.soon_days;
     conf.keep_empty = matches.opt_present("keep-empty");
+    conf.keep_tags = matches.opt_present("keep-tags");
     parse_filter(&matches, &mut conf.flt, soon_days)?;
 
     let mut idx: usize = 0;

src/main.rs

@@ -424,6 +424,30 @@ fn task_clean(stdout: &mut StandardStream, tasks: &mut todo::TaskVec, conf: &con
     Ok(())
 }
 
+fn copy_tags_from_task(subj: &str, task: &mut todotxt::Task) -> String {
+    let now = chrono::Local::now().date_naive();
+    let mut tsk = todotxt::Task::parse(subj, now);
+    tsk.priority = task.priority;
+    tsk.create_date = task.create_date;
+    tsk.finish_date = task.finish_date;
+    tsk.finished = task.finished;
+    let mut sbj = format!("{0}", tsk);
+
+    for ctx in &task.contexts {
+        sbj += &format!(" @{0}", ctx);
+    }
+    for prj in &task.projects {
+        sbj += &format!(" +{0}", prj);
+    }
+    for htag in &task.hashtags {
+        sbj += &format!(" #{0}", htag);
+    }
+    for (k, v) in &task.tags {
+        sbj += &format!(" {k}:{v}");
+    }
+    sbj
+}
+
 fn task_edit(stdout: &mut StandardStream, tasks: &mut todo::TaskVec, conf: &conf::Conf) -> io::Result<()> {
     if is_filter_empty(&conf.flt) {
         writeln!(stdout, "Warning: modifying of all tasks requested. Please specify tasks to edit.")?;
@@ -435,7 +459,22 @@ fn task_edit(stdout: &mut StandardStream, tasks: &mut todo::TaskVec, conf: &conf
         writeln!(stdout, "No todo changed")?
     } else if conf.dry {
         let mut clones = todo::clone_tasks(tasks, &todos);
-        let updated = todo::edit(&mut clones, None, &conf.todo);
+        let updated = if conf.keep_tags {
+            if let Some(ref subj) = conf.todo.subject {
+                let sbj = copy_tags_from_task(subj, &mut clones[0]);
+                let now = chrono::Local::now().date_naive();
+                let tsk = todotxt::Task::parse(&sbj, now);
+                clones[0] = tsk;
+                let mut changed = vec![false; clones.len()];
+                changed[0] = true;
+                changed
+            } else {
+                writeln!(stdout, "The option keep-tags can be used only when setting a new subject")?;
+                std::process::exit(1);
+            }
+        } else {
+            todo::edit(&mut clones, None, &conf.todo)
+        };
         let updated_cnt = calculate_updated(&updated);
 
         if updated_cnt == 0 {
@@ -450,7 +489,23 @@ fn task_edit(stdout: &mut StandardStream, tasks: &mut todo::TaskVec, conf: &conf
             fmt::print_footer(stdout, tasks, &todos, &updated, &conf.fmt, &cols, &widths)?;
         }
     } else {
-        let updated = todo::edit(tasks, Some(&todos), &conf.todo);
+        let updated = if conf.keep_tags {
+            if let Some(ref subj) = conf.todo.subject {
+                let id = todos[0];
+                let sbj = copy_tags_from_task(subj, &mut tasks[id]);
+                let now = chrono::Local::now().date_naive();
+                let tsk = todotxt::Task::parse(&sbj, now);
+                tasks[id] = tsk;
+                let mut changed = vec![false; todos.len()];
+                changed[0] = true;
+                changed
+            } else {
+                writeln!(stdout, "The option keep-tags can be used only when setting a new subject")?;
+                std::process::exit(1);
+            }
+        } else {
+            todo::edit(tasks, Some(&todos), &conf.todo)
+        };
         let updated_cnt = calculate_updated(&updated);
 
         if updated_cnt == 0 {