Add view subcommand to view a change in a browser (#30)

Closes #26

Cargo.toml

@@ -36,6 +36,7 @@ tracing = { version = "0.1.40", features = ["attributes"] }
 tracing-human-layer = "0.1.3"
 tracing-subscriber = { version = "0.3.18", features = ["env-filter", "registry"] }
 utf8-command = "1.0.1"
+webbrowser = "0.8.13"
 
 [dev-dependencies]
 indoc = "2.0.5"

src/change_id.rs

@@ -8,6 +8,12 @@ use std::ops::Deref;
 #[serde(transparent)]
 pub struct ChangeId(pub String);
 
+impl From<ChangeId> for String {
+    fn from(value: ChangeId) -> Self {
+        value.0
+    }
+}
+
 impl Display for ChangeId {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         self.0.fmt(f)

src/cli.rs

@@ -98,6 +98,13 @@ pub enum Command {
         /// Defaults to the `HEAD` commit's change.
         query: Option<String>,
     },
+    /// Open a change in a web browser.
+    View {
+        /// The change to view.
+        ///
+        /// Defaults to the `HEAD` commit's change.
+        query: Option<String>,
+    },
 }
 
 #[derive(Debug, Clone, Subcommand)]

src/main.rs

@@ -155,6 +155,19 @@ fn main() -> miette::Result<()> {
             let chain = gerrit.format_chain(query)?;
             let _ = stdoutln!("{chain}");
         }
+        cli::Command::View { query } => {
+            let git = Git::new();
+            let gerrit = git.gerrit(None)?;
+            let query = match query {
+                Some(query) => query,
+                None => git.change_id("HEAD")?.into(),
+            };
+            let change = gerrit.get_change(query)?;
+            let url = &change.url;
+            webbrowser::open(url)
+                .into_diagnostic()
+                .wrap_err_with(|| format!("Failed to open browser for {url}"))?;
+        }
     }
 
     Ok(())