fix: open scrollback editor on windows without sh

refs #914

1 files changed, 35 insertions, 0 deletions

diff --git a/src/platform/macos.rs b/src/platform/macos.rs
index df957652..3770a3be 100644
--- a/src/platform/macos.rs
+++ b/src/platform/macos.rs
@@ -16,6 +16,30 @@ const PROC_PGRP_ONLY: u32 = 2;
 const SERVER_NOFILE_LIMIT_TARGET: libc::rlim_t = 8192;
 const CF_STRING_ENCODING_UTF8: u32 = 0x0800_0100;
 
+pub(crate) fn scrollback_editor_argv(path: &Path) -> std::io::Result<Vec<String>> {
+    let quoted_path = shell_quote(&path.display().to_string());
+    let command = format!(
+        r#"scrollback_file={quoted_path}; eval "${{EDITOR:-vi}} \"\$scrollback_file\""; status=$?; rm -f "$scrollback_file"; exit $status"#
+    );
+    Ok(vec!["/bin/sh".to_string(), "-c".to_string(), command])
+}
+
+fn shell_quote(value: &str) -> String {
+    if !value.is_empty()
+        && value.chars().all(|ch| {
+            ch.is_ascii_alphanumeric()
+                || matches!(
+                    ch,
+                    '@' | '%' | '_' | '+' | '=' | ':' | ',' | '.' | '/' | '-'
+                )
+        })
+    {
+        return value.to_string();
+    }
+
+    format!("'{}'", value.replace('\'', "'\\''"))
+}
+
 #[repr(C)]
 struct TisInputSource {
     _private: [u8; 0],
@@ -1117,4 +1141,15 @@ printf '%s\n' "$@" > "$HERDR_NOTIFY_ARGS"
             "-e\non run argv\n-e\ndisplay notification (item 2 of argv) with title (item 1 of argv)\n-e\nend run\ntitle\nbody\n"
         );
     }
+
+    #[test]
+    fn scrollback_editor_argv_preserves_unix_editor_shell_semantics() {
+        let path = std::path::Path::new("/tmp/herdr scrollback.txt");
+        let argv = scrollback_editor_argv(path).unwrap();
+
+        assert_eq!(argv[0], "/bin/sh");
+        assert_eq!(argv[1], "-c");
+        assert!(argv[2].contains("EDITOR:-vi"));
+        assert!(argv[2].contains("/tmp/herdr scrollback.txt"));
+    }
 }