Implement remote imports and cleanup import chaining

5 files changed, 34 insertions, 34 deletions

diff --git a/dhall/src/syntax/ast/import.rs b/dhall/src/syntax/ast/import.rs
index 7bde6e0..75d7946 100644
--- a/dhall/src/syntax/ast/import.rs
+++ b/dhall/src/syntax/ast/import.rs
@@ -18,7 +18,7 @@ pub struct FilePath {
 
 /// The location of import (i.e. local vs. remote vs. environment)
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
-pub enum ImportLocation<SubExpr> {
+pub enum ImportTarget<SubExpr> {
     Local(FilePrefix, FilePath),
     Remote(URL<SubExpr>),
     Env(String),
@@ -57,7 +57,7 @@ pub enum Hash {
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct Import<SubExpr> {
     pub mode: ImportMode,
-    pub location: ImportLocation<SubExpr>,
+    pub location: ImportTarget<SubExpr>,
     pub hash: Option<Hash>,
 }
 
@@ -77,12 +77,12 @@ impl<SE> URL<SE> {
     }
 }
 
-impl<SE> ImportLocation<SE> {
+impl<SE> ImportTarget<SE> {
     pub fn traverse_ref<'a, Err, SE2>(
         &'a self,
         f: impl FnOnce(&'a SE) -> Result<SE2, Err>,
-    ) -> Result<ImportLocation<SE2>, Err> {
-        use ImportLocation::*;
+    ) -> Result<ImportTarget<SE2>, Err> {
+        use ImportTarget::*;
         Ok(match self {
             Local(prefix, path) => Local(*prefix, path.clone()),
             Remote(url) => Remote(url.traverse_ref(f)?),
diff --git a/dhall/src/syntax/binary/decode.rs b/dhall/src/syntax/binary/decode.rs
index 2e50d61..bebc800 100644
--- a/dhall/src/syntax/binary/decode.rs
+++ b/dhall/src/syntax/binary/decode.rs
@@ -5,7 +5,7 @@ use std::iter::FromIterator;
 use crate::error::DecodeError;
 use crate::syntax;
 use crate::syntax::{
-    Expr, ExprKind, FilePath, FilePrefix, Hash, ImportLocation, ImportMode,
+    Expr, ExprKind, FilePath, FilePrefix, Hash, ImportMode, ImportTarget,
     Integer, InterpolatedText, Label, LitKind, Natural, Scheme, Span,
     UnspannedExpr, URL, V,
 };
@@ -305,7 +305,7 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
                             })
                             .collect::<Result<_, _>>()?;
                         let path = FilePath { file_path };
-                        ImportLocation::Remote(URL {
+                        ImportTarget::Remote(URL {
                             scheme,
                             authority,
                             path,
@@ -332,7 +332,7 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
                             })
                             .collect::<Result<_, _>>()?;
                         let path = FilePath { file_path };
-                        ImportLocation::Local(prefix, path)
+                        ImportTarget::Local(prefix, path)
                     }
                     6 => {
                         let env = match rest.next() {
@@ -341,9 +341,9 @@ fn cbor_value_to_dhall(data: &cbor::Value) -> Result<DecodedExpr, DecodeError> {
                                 "import/env".to_owned(),
                             ))?,
                         };
-                        ImportLocation::Env(env)
+                        ImportTarget::Env(env)
                     }
-                    7 => ImportLocation::Missing,
+                    7 => ImportTarget::Missing,
                     _ => Err(DecodeError::WrongFormatError(
                         "import/type".to_owned(),
                     ))?,
diff --git a/dhall/src/syntax/binary/encode.rs b/dhall/src/syntax/binary/encode.rs
index d2aa240..2484d8d 100644
--- a/dhall/src/syntax/binary/encode.rs
+++ b/dhall/src/syntax/binary/encode.rs
@@ -6,8 +6,8 @@ use crate::error::EncodeError;
 use crate::syntax;
 use crate::syntax::map::DupTreeMap;
 use crate::syntax::{
-    Expr, ExprKind, FilePrefix, Hash, Import, ImportLocation, ImportMode,
-    Label, Scheme, V,
+    Expr, ExprKind, FilePrefix, Hash, Import, ImportMode, ImportTarget, Label,
+    Scheme, V,
 };
 
 pub(crate) fn encode(expr: &Expr) -> Result<Vec<u8>, EncodeError> {
@@ -179,10 +179,10 @@ where
     use serde::ser::SerializeSeq;
 
     let count = 4 + match &import.location {
-        ImportLocation::Remote(url) => 3 + url.path.file_path.len(),
-        ImportLocation::Local(_, path) => path.file_path.len(),
-        ImportLocation::Env(_) => 1,
-        ImportLocation::Missing => 0,
+        ImportTarget::Remote(url) => 3 + url.path.file_path.len(),
+        ImportTarget::Local(_, path) => path.file_path.len(),
+        ImportTarget::Env(_) => 1,
+        ImportTarget::Missing => 0,
     };
     let mut ser_seq = ser.serialize_seq(Some(count))?;
 
@@ -206,23 +206,23 @@ where
     ser_seq.serialize_element(&U64(mode))?;
 
     let scheme = match &import.location {
-        ImportLocation::Remote(url) => match url.scheme {
+        ImportTarget::Remote(url) => match url.scheme {
             Scheme::HTTP => 0,
             Scheme::HTTPS => 1,
         },
-        ImportLocation::Local(prefix, _) => match prefix {
+        ImportTarget::Local(prefix, _) => match prefix {
             FilePrefix::Absolute => 2,
             FilePrefix::Here => 3,
             FilePrefix::Parent => 4,
             FilePrefix::Home => 5,
         },
-        ImportLocation::Env(_) => 6,
-        ImportLocation::Missing => 7,
+        ImportTarget::Env(_) => 6,
+        ImportTarget::Missing => 7,
     };
     ser_seq.serialize_element(&U64(scheme))?;
 
     match &import.location {
-        ImportLocation::Remote(url) => {
+        ImportTarget::Remote(url) => {
             match &url.headers {
                 None => ser_seq.serialize_element(&Null)?,
                 Some(e) => {
@@ -238,15 +238,15 @@ where
                 Some(x) => ser_seq.serialize_element(x)?,
             };
         }
-        ImportLocation::Local(_, path) => {
+        ImportTarget::Local(_, path) => {
             for p in path.file_path.iter() {
                 ser_seq.serialize_element(&p)?;
             }
         }
-        ImportLocation::Env(env) => {
+        ImportTarget::Env(env) => {
             ser_seq.serialize_element(env)?;
         }
-        ImportLocation::Missing => {}
+        ImportTarget::Missing => {}
     }
 
     ser_seq.end()
diff --git a/dhall/src/syntax/text/parser.rs b/dhall/src/syntax/text/parser.rs
index ba64a75..7140332 100644
--- a/dhall/src/syntax/text/parser.rs
+++ b/dhall/src/syntax/text/parser.rs
@@ -10,7 +10,7 @@ use crate::syntax::map::{DupTreeMap, DupTreeSet};
 use crate::syntax::ExprKind::*;
 use crate::syntax::LitKind::*;
 use crate::syntax::{
-    Double, Expr, FilePath, FilePrefix, Hash, ImportLocation, ImportMode,
+    Double, Expr, FilePath, FilePrefix, Hash, ImportMode, ImportTarget,
     Integer, InterpolatedText, InterpolatedTextContents, Label, NaiveDouble,
     Natural, Scheme, Span, UnspannedExpr, URL, V,
 };
@@ -483,9 +483,9 @@ impl DhallParser {
     }
 
     #[alias(import_type)]
-    fn local(input: ParseInput) -> ParseResult<ImportLocation<Expr>> {
+    fn local(input: ParseInput) -> ParseResult<ImportTarget<Expr>> {
         Ok(match_nodes!(input.into_children();
-            [local_path((prefix, p))] => ImportLocation::Local(prefix, p),
+            [local_path((prefix, p))] => ImportTarget::Local(prefix, p),
         ))
     }
 
@@ -550,17 +550,17 @@ impl DhallParser {
     }
 
     #[alias(import_type)]
-    fn http(input: ParseInput) -> ParseResult<ImportLocation<Expr>> {
-        Ok(ImportLocation::Remote(match_nodes!(input.into_children();
+    fn http(input: ParseInput) -> ParseResult<ImportTarget<Expr>> {
+        Ok(ImportTarget::Remote(match_nodes!(input.into_children();
             [http_raw(url)] => url,
             [http_raw(url), expression(e)] => URL { headers: Some(e), ..url },
         )))
     }
 
     #[alias(import_type)]
-    fn env(input: ParseInput) -> ParseResult<ImportLocation<Expr>> {
+    fn env(input: ParseInput) -> ParseResult<ImportTarget<Expr>> {
         Ok(match_nodes!(input.into_children();
-            [environment_variable(v)] => ImportLocation::Env(v),
+            [environment_variable(v)] => ImportTarget::Env(v),
         ))
     }
     #[alias(environment_variable)]
@@ -593,8 +593,8 @@ impl DhallParser {
     }
 
     #[alias(import_type)]
-    fn missing(_input: ParseInput) -> ParseResult<ImportLocation<Expr>> {
-        Ok(ImportLocation::Missing)
+    fn missing(_input: ParseInput) -> ParseResult<ImportTarget<Expr>> {
+        Ok(ImportTarget::Missing)
     }
 
     fn hash(input: ParseInput) -> ParseResult<Hash> {
diff --git a/dhall/src/syntax/text/printer.rs b/dhall/src/syntax/text/printer.rs
index 53f2c8f..5bb987b 100644
--- a/dhall/src/syntax/text/printer.rs
+++ b/dhall/src/syntax/text/printer.rs
@@ -379,8 +379,8 @@ impl Display for Hash {
 impl<SubExpr: Display> Display for Import<SubExpr> {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
         use FilePrefix::*;
-        use ImportLocation::*;
         use ImportMode::*;
+        use ImportTarget::*;
         let quote_if_needed = |s: &str| -> String {
             if s.chars().all(|c| c.is_ascii_alphanumeric()) {
                 s.to_string()