Add search feature using grep.

src/main.rs

@@ -1,7 +1,7 @@
 use std::path::PathBuf;
 
 extern crate historian;
-use historian::{Historian, Page, Edit, PageRenderer, export_wiki, Linker};
+use historian::{Historian, Page, Edit, PageRenderer, export_wiki, Linker, Searcher, SearchResult};
 
 #[macro_use] extern crate rocket;
 use rocket::serde::json::Json;
@@ -71,6 +71,17 @@ async fn page<'r>(
                                 .render()))
                         }
                     }
+
+                    if key == "q" {
+                        return PageResponder::Page(RawHtml(renderer.template("search.html")
+                            .with_historian(&historian)
+                            .with_page(&page)
+                            .insert("results", &Searcher::new(&historian).search(&page, value))
+                            .insert("options", &toml! {
+                                dynamic = true
+                            })
+                            .render()))
+                    }
                 }
             }
 
@@ -191,7 +202,15 @@ struct Args {
 
     /// Path to templates
     #[arg(long)]
-    template_path: Option<String>
+    template_path: Option<String>,
+
+    /// Search the wiki
+    #[arg(long)]
+    search: Option<String>,
+
+    /// Search root
+    #[arg(long)]
+    search_root: Option<String>
 }
 
 fn print_tree(historian: &Historian, page: &Page, prefix: &str) {
@@ -203,6 +222,14 @@ fn print_tree(historian: &Historian, page: &Page, prefix: &str) {
     }
 }
 
+fn print_result(result: &SearchResult) {
+    println!("{}", result.page.full_name);
+    for line in &result.matches {
+        println!("{}", line);
+    }
+    println!("---");
+}
+
 #[rocket::main]
 async fn main() {
     let args = Args::parse();
@@ -239,6 +266,16 @@ async fn main() {
             return;
         }
 
+        if let Some(search) = args.search {
+            let searcher = Searcher::new(&historian);
+            let search_root = args.search_root.as_deref().unwrap_or("");
+            let page = historian.resolve_to_page(&search_root).expect("failed to find page");
+            for result in searcher.search(&page, &search) {
+                print_result(&result);
+            }
+            return;
+        }
+
         rocket::build()
             .manage(historian)
             .manage(renderer)