cli/terminal: Formatting Functions for Ranges

These allow convenient formatting of long/full object identifiers,
as well as formatting ranges.

crates/radicle-cli/src/terminal/format.rs

@@ -32,11 +32,44 @@ pub fn node_id_human(node: &NodeId) -> Paint<String> {
     Paint::new(node.to_human())
 }
 
-/// Format a git Oid.
+/// Format a Git object identifier.
+/// To format a Git object identifier in short form, see [`oid`].
+pub fn oid_long(oid: impl Into<radicle::git::Oid>) -> Paint<String> {
+    Paint::new(format!("{}", oid.into()))
+}
+
+/// Format a Git object identifier, shortened to the first 7 characters.
+/// To format a Git object identifier in long form, see [`oid_long`].
 pub fn oid(oid: impl Into<radicle::git::Oid>) -> Paint<String> {
     Paint::new(format!("{:.7}", oid.into()))
 }
 
+fn double_dot(base: impl std::fmt::Display, head: impl std::fmt::Display) -> Paint<String> {
+    Paint::new(format!("{}..{}", base, head))
+}
+
+/// Format a range between Git object identifiers (usually commits).
+/// Both object identifiers are formatted in their long form,
+/// see [`oid_long`].
+/// To format a range in short form, see [`range`].
+pub fn range_long<IntoOid>(base: IntoOid, head: IntoOid) -> Paint<String>
+where
+    IntoOid: Into<radicle::git::Oid>,
+{
+    double_dot(oid_long(base), oid_long(head))
+}
+
+/// Format a range between Git object identifiers (usually commits).
+/// Both object identifiers are formatted in short form,
+/// see [`oid`].
+/// To format a range in long form, see [`range_long`].
+pub fn range<IntoOid>(base: IntoOid, head: IntoOid) -> Paint<String>
+where
+    IntoOid: Into<radicle::git::Oid>,
+{
+    double_dot(oid(base), oid(head))
+}
+
 /// Wrap parenthesis around styled input, eg. `"input"` -> `"(input)"`.
 pub fn parens<D: fmt::Display>(input: Paint<D>) -> Paint<String> {
     Paint::new(format!("({})", input.item)).with_style(input.style)

crates/radicle-cli/src/terminal/patch/timeline.rs

@@ -209,7 +209,9 @@ impl Update<'_> {
                             line.pad(
                                 2 // alignment
                                     + 2 // parens
-                                    + LENGTH_OF_SHORT_COMMIT_HASH
+                                    + LENGTH_OF_SHORT_COMMIT_HASH // base
+                                    + 2 // ..
+                                    + LENGTH_OF_SHORT_COMMIT_HASH // head
                                     + LENGTH_OF_SPACES,
                             );
                         }