Chooser: Pass justfile path to preview command for default chooser

src/config.rs

@@ -3,13 +3,19 @@ use {
   clap::{App, AppSettings, Arg, ArgGroup, ArgMatches, ArgSettings},
 };
 
-// These three strings should be kept in sync:
-pub(crate) const CHOOSER_DEFAULT: &str =
-  "fzf --multi --preview 'just --unstable --color always --show {}'";
 pub(crate) const CHOOSER_ENVIRONMENT_KEY: &str = "JUST_CHOOSER";
-pub(crate) const CHOOSE_HELP: &str = "Select one or more recipes to run using a binary. If \
-                                      `--chooser` is not passed the chooser defaults to the value \
-                                      of $JUST_CHOOSER, falling back to `fzf`";
+
+pub(crate) const CHOOSE_HELP: &str = "Select one or more recipes to run using a binary chooser. \
+                                      If `--chooser` is not passed the chooser defaults to the \
+                                      value of $JUST_CHOOSER, falling back to `fzf`";
+
+pub(crate) fn chooser_default(justfile: &Path) -> OsString {
+  let mut chooser = OsString::new();
+  chooser.push("fzf --multi --preview 'just --unstable --color always --justfile \"");
+  chooser.push(justfile);
+  chooser.push("\" --show {}'");
+  chooser
+}
 
 #[derive(Debug, PartialEq)]
 #[allow(clippy::struct_excessive_bools)]

src/subcommand.rs

@@ -216,7 +216,7 @@ impl Subcommand {
     let chooser = chooser
       .map(OsString::from)
       .or_else(|| env::var_os(config::CHOOSER_ENVIRONMENT_KEY))
-      .unwrap_or_else(|| OsString::from(config::CHOOSER_DEFAULT));
+      .unwrap_or_else(|| config::chooser_default(&search.justfile));
 
     let result = justfile
       .settings

tests/choose.rs

@@ -152,7 +152,7 @@ fn invoke_error_function() {
       ",
     )
     .stderr_regex(
-      r"error: Chooser `/ -cu fzf --multi --preview 'just --unstable --color always --show \{\}'` invocation failed: .*\n",
+      r#"error: Chooser `/ -cu fzf --multi --preview 'just --unstable --color always --justfile ".*justfile" --show \{\}'` invocation failed: .*\n"#,
     )
     .status(EXIT_FAILURE)
     .shell(false)