Remove check that paths are inside game path

It didn't work correctly for OpenMW or for additional data paths, fixing it would be significantly more complicated, and it doesn't really add any value.

src/function/parse.rs

@@ -1,4 +1,4 @@
-use std::path::{Component, Path, PathBuf};
+use std::path::PathBuf;
 use std::str;
 
 use nom::branch::alt;
@@ -12,7 +12,7 @@ use regex::{Regex, RegexBuilder};
 
 use super::{ComparisonOperator, Function};
 use crate::error::ParsingErrorKind;
-use crate::{map_err, whitespace, ParsingError, ParsingResult};
+use crate::{map_err, whitespace, ParsingResult};
 
 impl ComparisonOperator {
     pub fn parse(input: &str) -> IResult<&str, ComparisonOperator> {
@@ -32,20 +32,6 @@ const INVALID_PATH_CHARS: &str = "\":*?<>|";
 const INVALID_NON_REGEX_PATH_CHARS: &str = "\":*?<>|\\"; // \ is treated as invalid to distinguish regex strings.
 const INVALID_REGEX_PATH_CHARS: &str = "\"<>";
 
-fn is_in_game_path(path: &Path) -> bool {
-    let mut previous_component = Component::CurDir;
-    for component in path.components() {
-        match (component, previous_component) {
-            (Component::Prefix(_) | Component::RootDir, _)
-            | (Component::ParentDir, Component::ParentDir) => return false,
-            (Component::CurDir, _) => {}
-            _ => previous_component = component,
-        }
-    }
-
-    true
-}
-
 fn build_regex(input: &str) -> Result<(&'static str, Regex), regex::Error> {
     RegexBuilder::new(input)
         .case_insensitive(true)
@@ -62,10 +48,6 @@ fn parse_anchored_regex(input: &str) -> ParsingResult<Regex> {
         .map_err(|e| Err::Failure(ParsingErrorKind::from(e).at(input)))
 }
 
-fn not_in_game_directory(input: &str, path: PathBuf) -> Err<ParsingError<&str>> {
-    Err::Failure(ParsingErrorKind::PathIsNotInGameDirectory(path).at(input))
-}
-
 fn parse_path(input: &str) -> IResult<&str, PathBuf> {
     map(
         delimited(tag("\""), is_not(INVALID_PATH_CHARS), tag("\"")),
@@ -89,11 +71,7 @@ fn parse_file_size_args(input: &str) -> ParsingResult<(PathBuf, u64)> {
 
     let (remaining_input, (path, _, size)) = parser.parse(input)?;
 
-    if is_in_game_path(&path) {
-        Ok((remaining_input, (path, size)))
-    } else {
-        Err(not_in_game_directory(input, path))
-    }
+    Ok((remaining_input, (path, size)))
 }
 
 fn parse_version(input: &str) -> IResult<&str, String> {
@@ -115,11 +93,7 @@ fn parse_version_args(input: &str) -> ParsingResult<(PathBuf, String, Comparison
 
     let (remaining_input, (path, _, version, _, comparator)) = map_err(parser).parse(input)?;
 
-    if is_in_game_path(&path) {
-        Ok((remaining_input, (path, version, comparator)))
-    } else {
-        Err(not_in_game_directory(input, path))
-    }
+    Ok((remaining_input, (path, version, comparator)))
 }
 
 fn parse_filename_version_args(
@@ -175,11 +149,7 @@ fn parse_checksum_args(input: &str) -> ParsingResult<(PathBuf, u32)> {
 
     let (remaining_input, (path, _, crc)) = parser.parse(input)?;
 
-    if is_in_game_path(&path) {
-        Ok((remaining_input, (path, crc)))
-    } else {
-        Err(not_in_game_directory(input, path))
-    }
+    Ok((remaining_input, (path, crc)))
 }
 
 fn parse_non_regex_path(input: &str) -> ParsingResult<PathBuf> {
@@ -188,11 +158,7 @@ fn parse_non_regex_path(input: &str) -> ParsingResult<PathBuf> {
     })
     .parse(input)?;
 
-    if is_in_game_path(&path) {
-        Ok((remaining_input, path))
-    } else {
-        Err(not_in_game_directory(input, path))
-    }
+    Ok((remaining_input, path))
 }
 
 /// Parse a string that is a path where the last component is a regex string
@@ -210,10 +176,6 @@ fn parse_regex_path(input: &str) -> ParsingResult<(PathBuf, Regex)> {
 
     let parent_path = PathBuf::from(parent_path_slice);
 
-    if !is_in_game_path(&parent_path) {
-        return Err(not_in_game_directory(input, parent_path));
-    }
-
     let regex = parse_anchored_regex(regex_slice)?.1;
 
     Ok((remaining_input, (parent_path, regex)))
@@ -356,6 +318,8 @@ impl Function {
 
 #[cfg(test)]
 mod tests {
+    use std::path::Path;
+
     use super::*;
 
     #[test]
@@ -397,11 +361,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_file_path_is_outside_the_game_directory() {
-        assert!(Function::parse("file(\"../../Cargo.toml\")").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_file_regex_function_with_no_parent_path() {
         let output = Function::parse("file(\"Cargo.*\")").unwrap();
@@ -435,11 +394,6 @@ mod tests {
         assert!(Function::parse("file(\"sub\\dir/\")").is_err());
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_file_regex_parent_path_is_outside_the_game_directory() {
-        assert!(Function::parse("file(\"../../Cargo.*\")").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_file_size_function() {
         let output = Function::parse("file_size(\"Cargo.toml\", 1234)").unwrap();
@@ -454,11 +408,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_file_size_is_outside_the_game_directory() {
-        assert!(Function::parse("file_size(\"../../Cargo.toml\", 1234)").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_readable_function() {
         let output = Function::parse("readable(\"Cargo.toml\")").unwrap();
@@ -470,11 +419,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_readable_path_is_outside_the_game_directory() {
-        assert!(Function::parse("readable(\"../../Cargo.toml\")").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_an_is_executable_function() {
         let output = Function::parse("is_executable(\"Cargo.toml\")").unwrap();
@@ -486,11 +430,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_is_executable_path_is_outside_the_game_directory() {
-        assert!(Function::parse("is_executable(\"../../Cargo.toml\")").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_an_active_path_function() {
         let output = Function::parse("active(\"Cargo.toml\")").unwrap();
@@ -502,13 +441,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_active_path_is_outside_the_game_directory() {
-        // Trying to check if a path that isn't a plugin in the data folder is
-        // active is pointless, but it's not worth having a more specific check.
-        assert!(Function::parse("active(\"../../Cargo.toml\")").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_an_active_regex_function() {
         let output = Function::parse("active(\"Cargo.*\")").unwrap();
@@ -533,13 +465,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_is_master_path_is_outside_the_game_directory() {
-        // Trying to check if a path that isn't a plugin in the data folder is
-        // active is pointless, but it's not worth having a more specific check.
-        assert!(Function::parse("is_master(\"../../Blank.esm\")").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_many_function_with_no_parent_path() {
         let output = Function::parse("many(\"Cargo.*\")").unwrap();
@@ -573,11 +498,6 @@ mod tests {
         assert!(Function::parse("many(\"subdir/\")").is_err());
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_many_parent_path_is_outside_the_game_directory() {
-        assert!(Function::parse("file(\"../../Cargo.*\")").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_many_active_function() {
         let output = Function::parse("many_active(\"Cargo.*\")").unwrap();
@@ -605,11 +525,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_checksum_path_is_outside_the_game_directory() {
-        assert!(Function::parse("checksum(\"../../Cargo.toml\", DEADBEEF)").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_version_equals_function() {
         let output = Function::parse("version(\"Cargo.toml\", \"1.2\", ==)").unwrap();
@@ -715,11 +630,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_version_path_is_outside_the_game_directory() {
-        assert!(Function::parse("version(\"../../Cargo.toml\", \"1.2\", ==)").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_product_version_equals_function() {
         let output = Function::parse("product_version(\"Cargo.toml\", \"1.2\", ==)").unwrap();
@@ -735,11 +645,6 @@ mod tests {
         }
     }
 
-    #[test]
-    fn function_parse_should_error_if_the_product_version_path_is_outside_the_game_directory() {
-        assert!(Function::parse("product_version(\"../../Cargo.toml\", \"1.2\", ==)").is_err());
-    }
-
     #[test]
     fn function_parse_should_parse_a_filename_version_equals_function() {
         let output =

src/lib.rs

@@ -488,16 +488,6 @@ mod tests {
         );
     }
 
-    #[test]
-    fn expression_from_str_should_error_with_input_on_path_outside_game_directory() {
-        let error = Expression::from_str("file(\"../../Cargo.toml\")").unwrap_err();
-
-        assert_eq!(
-            "An error was encountered while parsing the expression \"../../Cargo.toml\\\")\": \"../../Cargo.toml\" is not in the game directory",
-            error.to_string()
-        );
-    }
-
     #[test]
     fn expression_parse_should_handle_a_single_compound_condition() {
         let result = Expression::from_str("file(\"Cargo.toml\")").unwrap();