Support {host} in hyperlinks

src/cli.rs

@@ -432,14 +432,14 @@ pub struct Opt {
     )]
     /// Format string for file hyperlinks (requires --hyperlinks).
     ///
-    /// The placeholders "{path}" and "{line}" will be replaced by the absolute file path and the
-    /// line number, respectively. The default value of this option creates hyperlinks using
-    /// standard file URLs; your operating system should open these in the application registered
-    /// for that file type. However, these do not make use of the line number. In order for the link
-    /// to open the file at the correct line number, you could use a custom URL format such as
-    /// "file-line://{path}:{line}" and register an application to handle the custom "file-line" URL
-    /// scheme by opening the file in your editor/IDE at the indicated line number. See
-    /// <https://github.com/dandavison/open-in-editor> for an example.
+    /// The placeholders "{host}", "{path}", and "{line}" will be replaced by the hostname,
+    /// absolute file path and the line number, respectively. The default value of this option
+    /// creates hyperlinks using standard file URLs; your operating system should open these in the
+    /// application registered for that file type. However, these do not make use of the line
+    /// number. In order for the link to open the file at the correct line number, you could use a
+    /// custom URL format such as "file-line://{path}:{line}" and register an application to handle
+    /// the custom "file-line" URL scheme by opening the file in your editor/IDE at the indicated
+    /// line number. See <https://github.com/dandavison/open-in-editor> for an example.
     pub hyperlinks_file_link_format: String,
 
     #[arg(

src/config.rs

@@ -78,6 +78,7 @@ pub struct Config {
     pub grep_output_type: Option<GrepType>,
     pub grep_separator_symbol: String,
     pub handle_merge_conflicts: bool,
+    pub hostname: Option<String>,
     pub hunk_header_file_style: Style,
     pub hunk_header_line_number_style: Style,
     pub hunk_header_style_include_file_path: HunkHeaderIncludeFilePath,
@@ -326,6 +327,7 @@ impl From<cli::Opt> for Config {
             grep_output_type,
             grep_separator_symbol: opt.grep_separator_symbol,
             handle_merge_conflicts: !opt.raw,
+            hostname: opt.env.hostname,
             hunk_header_file_style: styles["hunk-header-file-style"],
             hunk_header_line_number_style: styles["hunk-header-line-number-style"],
             hunk_header_style: styles["hunk-header-style"],

src/env.rs

@@ -19,6 +19,7 @@ pub struct DeltaEnv {
     pub features: Option<String>,
     pub git_config_parameters: Option<String>,
     pub git_prefix: Option<String>,
+    pub hostname: Option<String>,
     pub navigate: Option<String>,
     pub pagers: (Option<String>, Option<String>),
 }
@@ -33,6 +34,7 @@ impl DeltaEnv {
         let features = env::var(DELTA_FEATURES).ok();
         let git_config_parameters = env::var(GIT_CONFIG_PARAMETERS).ok();
         let git_prefix = env::var(GIT_PREFIX).ok();
+        let hostname = hostname();
         let navigate = env::var(DELTA_NAVIGATE).ok();
 
         let current_dir = env::current_dir().ok();
@@ -53,12 +55,17 @@ impl DeltaEnv {
             features,
             git_config_parameters,
             git_prefix,
+            hostname,
             navigate,
             pagers,
         }
     }
 }
 
+fn hostname() -> Option<String> {
+    grep_cli::hostname().ok()?.to_str().map(|s| s.to_string())
+}
+
 #[cfg(test)]
 pub mod tests {
     use super::DeltaEnv;

src/features/hyperlinks.rs

@@ -56,6 +56,9 @@ where
     let mut url = config
         .hyperlinks_file_link_format
         .replace("{path}", &absolute_path.as_ref().to_string_lossy());
+    if let Some(host) = &config.hostname {
+        url = url.replace("{host}", host)
+    }
     if let Some(n) = line_number {
         url = url.replace("{line}", &format!("{n}"))
     } else {