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authorNadrieril Feneanar2019-10-12 19:22:14 +0100
committerGitHub2019-10-12 19:22:14 +0100
commit8a8eeeac3b4f7761fd0916ee69d182597090039d (patch)
tree5613752829163cbdbcdb9ecec3b6889cfe827425 /dhall/src
parentd022cd7e807104ffed60a76058c4ccd478ac187a (diff)
parent88eadcfe795181a3fda138e92d7f787793248e5f (diff)
Merge pull request #99 from FintanH/fintan/canonicalize
Introduce Canonicalize
Diffstat (limited to 'dhall/src')
-rw-r--r--dhall/src/phase/binary.rs21
-rw-r--r--dhall/src/phase/resolve.rs80
2 files changed, 87 insertions, 14 deletions
diff --git a/dhall/src/phase/binary.rs b/dhall/src/phase/binary.rs
index 76d7ec9..4831c7e 100644
--- a/dhall/src/phase/binary.rs
+++ b/dhall/src/phase/binary.rs
@@ -1,11 +1,12 @@
use itertools::Itertools;
use serde_cbor::value::value as cbor;
use std::iter::FromIterator;
+use std::vec;
use dhall_syntax::map::DupTreeMap;
use dhall_syntax::{
rc, Expr, ExprF, FilePrefix, Hash, Import, ImportLocation, ImportMode,
- Integer, InterpolatedText, Label, Natural, Scheme, URL, V,
+ Integer, InterpolatedText, Label, Natural, Scheme, URL, V, FilePath
};
use crate::error::{DecodeError, EncodeError};
@@ -280,7 +281,7 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
"import/remote/query".to_owned(),
))?,
};
- let path = rest
+ let file_path = rest
.map(|s| match s.as_string() {
Some(s) => Ok(s.clone()),
None => Err(DecodeError::WrongFormatError(
@@ -288,6 +289,7 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
)),
})
.collect::<Result<_, _>>()?;
+ let path = FilePath { file_path };
ImportLocation::Remote(URL {
scheme,
authority,
@@ -306,7 +308,7 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
"import/local/prefix".to_owned(),
))?,
};
- let path = rest
+ let file_path = rest
.map(|s| match s.as_string() {
Some(s) => Ok(s.clone()),
None => Err(DecodeError::WrongFormatError(
@@ -314,6 +316,7 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
)),
})
.collect::<Result<_, _>>()?;
+ let path = FilePath { file_path };
ImportLocation::Local(prefix, path)
}
6 => {
@@ -580,8 +583,8 @@ where
use serde::ser::SerializeSeq;
let count = 4 + match &import.location {
- ImportLocation::Remote(url) => 3 + url.path.len(),
- ImportLocation::Local(_, path) => path.len(),
+ ImportLocation::Remote(url) => 3 + url.path.file_path.len(),
+ ImportLocation::Local(_, path) => path.file_path.len(),
ImportLocation::Env(_) => 1,
ImportLocation::Missing => 0,
};
@@ -631,8 +634,8 @@ where
}
};
ser_seq.serialize_element(&url.authority)?;
- for p in &url.path {
- ser_seq.serialize_element(p)?;
+ for p in url.path.file_path.iter() {
+ ser_seq.serialize_element(&p)?;
}
match &url.query {
None => ser_seq.serialize_element(&Null)?,
@@ -640,8 +643,8 @@ where
};
}
ImportLocation::Local(_, path) => {
- for p in path {
- ser_seq.serialize_element(p)?;
+ for p in path.file_path.iter() {
+ ser_seq.serialize_element(&p)?;
}
}
ImportLocation::Env(env) => {
diff --git a/dhall/src/phase/resolve.rs b/dhall/src/phase/resolve.rs
index 32e90c8..cccc7a7 100644
--- a/dhall/src/phase/resolve.rs
+++ b/dhall/src/phase/resolve.rs
@@ -3,6 +3,7 @@ use std::path::{Path, PathBuf};
use crate::error::{Error, ImportError};
use crate::phase::{Normalized, NormalizedExpr, Parsed, Resolved};
+use dhall_syntax::{FilePath, ImportLocation, URL};
type Import = dhall_syntax::Import<NormalizedExpr>;
@@ -30,14 +31,14 @@ fn resolve_import(
};
match &import.location {
Local(prefix, path) => {
- let path: PathBuf = path.iter().cloned().collect();
- let path = match prefix {
+ let path_buf: PathBuf = path.file_path.iter().collect();
+ let path_buf = match prefix {
// TODO: fail gracefully
- Parent => cwd.parent().unwrap().join(path),
- Here => cwd.join(path),
+ Parent => cwd.parent().unwrap().join(path_buf),
+ Here => cwd.join(path_buf),
_ => unimplemented!("{:?}", import),
};
- Ok(load_import(&path, import_cache, import_stack).map_err(|e| {
+ Ok(load_import(&path_buf, import_cache, import_stack).map_err(|e| {
ImportError::Recursive(import.clone(), Box::new(e))
})?)
}
@@ -107,6 +108,75 @@ pub(crate) fn skip_resolve_expr(
Ok(Resolved(expr))
}
+pub trait Canonicalize {
+ fn canonicalize(&self) -> Self;
+}
+
+impl Canonicalize for FilePath {
+ fn canonicalize(&self) -> FilePath {
+ let mut file_path = Vec::new();
+ let mut file_path_components = self.file_path.clone().into_iter();
+
+ loop {
+ let component = file_path_components.next();
+ match component.as_ref() {
+ // ───────────────────
+ // canonicalize(ε) = ε
+ None => break,
+
+ // canonicalize(directory₀) = directory₁
+ // ───────────────────────────────────────
+ // canonicalize(directory₀/.) = directory₁
+ Some(c) if c == "." => continue,
+
+ Some(c) if c == ".." => match file_path_components.next() {
+ // canonicalize(directory₀) = ε
+ // ────────────────────────────
+ // canonicalize(directory₀/..) = /..
+ None => file_path.push("..".to_string()),
+
+ // canonicalize(directory₀) = directory₁/..
+ // ──────────────────────────────────────────────
+ // canonicalize(directory₀/..) = directory₁/../..
+ Some(ref c) if c == ".." => {
+ file_path.push("..".to_string());
+ file_path.push("..".to_string());
+ },
+
+ // canonicalize(directory₀) = directory₁/component
+ // ─────────────────────────────────────────────── ; If "component" is not
+ // canonicalize(directory₀/..) = directory₁ ; ".."
+ Some(_) => continue,
+ },
+
+ // canonicalize(directory₀) = directory₁
+ // ───────────────────────────────────────────────────────── ; If no other
+ // canonicalize(directory₀/component) = directory₁/component ; rule matches
+ Some(c) => file_path.push(c.clone()),
+ }
+ }
+
+ FilePath { file_path }
+ }
+}
+
+impl<SE: Copy> Canonicalize for ImportLocation<SE> {
+ fn canonicalize(&self) -> ImportLocation<SE> {
+ match self {
+ ImportLocation::Local(prefix, file) => ImportLocation::Local(*prefix, file.canonicalize()),
+ ImportLocation::Remote(url) => ImportLocation::Remote(URL {
+ scheme: url.scheme,
+ authority: url.authority.clone(),
+ path: url.path.canonicalize(),
+ query: url.query.clone(),
+ headers: url.headers.clone(),
+ }),
+ ImportLocation::Env(name) => ImportLocation::Env(name.to_string()),
+ ImportLocation::Missing => ImportLocation::Missing,
+ }
+ }
+}
+
#[cfg(test)]
#[rustfmt::skip]
mod spec_tests {