Add WithStdin variants to SearchConfig

src/config.rs

@@ -1376,6 +1376,22 @@ mod tests {
     },
   }
 
+  test! {
+    name: search_config_from_working_directory_and_justfile_long_stdin,
+    args: ["--working-directory", "foo", "--justfile", "-"],
+    search_config: SearchConfig::WithStdinAndWorkingDirectory {
+      working_directory: PathBuf::from("foo"),
+    },
+  }
+
+  test! {
+    name: search_config_from_working_directory_and_justfile_short_stdin,
+    args: ["--working-directory", "foo", "-f", "-"],
+    search_config: SearchConfig::WithStdinAndWorkingDirectory {
+      working_directory: PathBuf::from("foo"),
+    },
+  }
+
   test! {
     name: search_config_justfile_long,
     args: ["--justfile", "foo"],
@@ -1384,6 +1400,12 @@ mod tests {
     },
   }
 
+  test! {
+    name: search_config_justfile_long_stdin,
+    args: ["--justfile", "-"],
+    search_config: SearchConfig::WithStdin,
+  }
+
   test! {
     name: search_config_justfile_short,
     args: ["-f", "foo"],
@@ -1392,6 +1414,12 @@ mod tests {
     },
   }
 
+  test! {
+    name: search_config_justfile_short_stdin,
+    args: ["-f", "-"],
+    search_config: SearchConfig::WithStdin,
+  }
+
   test! {
     name: search_directory_parent,
     args: ["../"],

src/search_config.rs

@@ -17,4 +17,10 @@ pub(crate) enum SearchConfig {
     justfile: PathBuf,
     working_directory: PathBuf,
   },
+  /// Use justfile loaded from stdin by using "-" as justfile name.
+  WithStdin,
+  /// Use justfile loaded from stdin and working directory.
+  WithStdinAndWorkingDirectory {
+    working_directory: PathBuf,
+  },
 }