Switch to using tokio too invoke emacs async.

src/compare/compare.rs

@@ -45,10 +45,10 @@ pub async fn run_anonymous_compare_with_settings<'g, 's, P: AsRef<str>>(
     let org_contents = org_contents.as_ref().replace("\r\n", "\n");
     let org_contents = org_contents.as_str();
     if !silent {
-        print_versions()?;
+        print_versions().await?;
     }
     let rust_parsed = parse_with_settings(org_contents, global_settings)?;
-    let org_sexp = emacs_parse_anonymous_org_document(org_contents, global_settings)?;
+    let org_sexp = emacs_parse_anonymous_org_document(org_contents, global_settings).await?;
     let (_remaining, parsed_sexp) = sexp(org_sexp.as_str()).map_err(|e| e.to_string())?;
 
     if !silent {
@@ -83,7 +83,7 @@ pub async fn run_compare_on_file_with_settings<'g, 's, P: AsRef<Path>>(
 ) -> Result<bool, Box<dyn std::error::Error>> {
     let org_path = org_path.as_ref();
     if !silent {
-        print_versions()?;
+        print_versions().await?;
     }
     let parent_directory = org_path
         .parent()
@@ -101,7 +101,7 @@ pub async fn run_compare_on_file_with_settings<'g, 's, P: AsRef<Path>>(
         global_settings
     };
     let rust_parsed = parse_file_with_settings(org_contents, &global_settings, Some(org_path))?;
-    let org_sexp = emacs_parse_file_org_document(org_path, &global_settings)?;
+    let org_sexp = emacs_parse_file_org_document(org_path, &global_settings).await?;
     let (_remaining, parsed_sexp) = sexp(org_sexp.as_str()).map_err(|e| e.to_string())?;
 
     if !silent {
@@ -129,8 +129,11 @@ pub async fn run_compare_on_file_with_settings<'g, 's, P: AsRef<Path>>(
     Ok(true)
 }
 
-fn print_versions() -> Result<(), Box<dyn std::error::Error>> {
-    eprintln!("Using emacs version: {}", get_emacs_version()?.trim());
-    eprintln!("Using org-mode version: {}", get_org_mode_version()?.trim());
+async fn print_versions() -> Result<(), Box<dyn std::error::Error>> {
+    eprintln!("Using emacs version: {}", get_emacs_version().await?.trim());
+    eprintln!(
+        "Using org-mode version: {}",
+        get_org_mode_version().await?.trim()
+    );
     Ok(())
 }

src/compare/parse.rs

@@ -1,5 +1,6 @@
 use std::path::Path;
-use std::process::Command;
+
+use tokio::process::Command;
 
 use crate::context::HeadlineLevelFilter;
 use crate::settings::GlobalSettings;
@@ -25,9 +26,9 @@ fn global_settings_elisp(global_settings: &GlobalSettings) -> String {
     ret
 }
 
-pub(crate) fn emacs_parse_anonymous_org_document<C>(
+pub(crate) async fn emacs_parse_anonymous_org_document<'g, 's, C>(
     file_contents: C,
-    global_settings: &GlobalSettings,
+    global_settings: &GlobalSettings<'g, 's>,
 ) -> Result<String, Box<dyn std::error::Error>>
 where
     C: AsRef<str>,
@@ -54,7 +55,7 @@ where
         .arg("--batch")
         .arg("--eval")
         .arg(elisp_script);
-    let out = cmd.output()?;
+    let out = cmd.output().await?;
     let status = out.status.exit_ok();
     if status.is_err() {
         eprintln!(
@@ -69,9 +70,9 @@ where
     Ok(String::from_utf8(org_sexp)?)
 }
 
-pub(crate) fn emacs_parse_file_org_document<P>(
+pub(crate) async fn emacs_parse_file_org_document<'g, 's, P>(
     file_path: P,
-    global_settings: &GlobalSettings,
+    global_settings: &GlobalSettings<'g, 's>,
 ) -> Result<String, Box<dyn std::error::Error>>
 where
     P: AsRef<Path>,
@@ -106,7 +107,7 @@ where
         .arg("--batch")
         .arg("--eval")
         .arg(elisp_script);
-    let out = cmd.output()?;
+    let out = cmd.output().await?;
     let status = out.status.exit_ok();
     if status.is_err() {
         eprintln!(
@@ -143,7 +144,7 @@ where
     output
 }
 
-pub fn get_emacs_version() -> Result<String, Box<dyn std::error::Error>> {
+pub async fn get_emacs_version() -> Result<String, Box<dyn std::error::Error>> {
     let elisp_script = r#"(progn
      (message "%s" (version))
 )"#;
@@ -156,12 +157,12 @@ pub fn get_emacs_version() -> Result<String, Box<dyn std::error::Error>> {
         .arg("--eval")
         .arg(elisp_script);
 
-    let out = cmd.output()?;
+    let out = cmd.output().await?;
     out.status.exit_ok()?;
     Ok(String::from_utf8(out.stderr)?)
 }
 
-pub fn get_org_mode_version() -> Result<String, Box<dyn std::error::Error>> {
+pub async fn get_org_mode_version() -> Result<String, Box<dyn std::error::Error>> {
     let elisp_script = r#"(progn
      (org-mode)
      (message "%s" (org-version nil t nil))
@@ -175,7 +176,7 @@ pub fn get_org_mode_version() -> Result<String, Box<dyn std::error::Error>> {
         .arg("--eval")
         .arg(elisp_script);
 
-    let out = cmd.output()?;
+    let out = cmd.output().await?;
     out.status.exit_ok()?;
     Ok(String::from_utf8(out.stderr)?)
 }