Split out `CmdRepl` and `editorFor`

The REPL itself and the `nix repl` CLI are conceptually different
things, and thus deserve to be in different files.

1 files changed, 20 insertions, 0 deletions

diff --git a/src/libcmd/editor-for.cc b/src/libcmd/editor-for.cc
new file mode 100644
index 000000000..f674f32bd
--- /dev/null
+++ b/src/libcmd/editor-for.cc
@@ -0,0 +1,20 @@
+#include "util.hh"
+#include "editor-for.hh"
+
+namespace nix {
+
+Strings editorFor(const Path & file, uint32_t line)
+{
+    auto editor = getEnv("EDITOR").value_or("cat");
+    auto args = tokenizeString<Strings>(editor);
+    if (line > 0 && (
+        editor.find("emacs") != std::string::npos ||
+        editor.find("nano") != std::string::npos ||
+        editor.find("vim") != std::string::npos ||
+        editor.find("kak") != std::string::npos))
+        args.push_back(fmt("+%d", line));
+    args.push_back(file);
+    return args;
+}
+
+}