refactor: don't use anyhow in the library part of the crate

Add one variant to the SubplotError enum and change src/codegen.rs to
return Result<_, SubplotError> instead of anyhow::Result<_>.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/error.rs b/src/error.rs
index 73cfbb6..eb70e28 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -12,7 +12,7 @@ pub enum SubplotError {
 
     /// Subplot could not find a file named as a functions file.
     #[error("functions file could not be found: {0}: {1}")]
-    FunctionsFileNotFound(PathBuf, anyhow::Error),
+    FunctionsFileNotFound(PathBuf, std::io::Error),
 
     /// The simple pattern specifies a kind that is unknown.
     #[error("simple pattern kind {0} is unknown")]
@@ -204,6 +204,10 @@ pub enum SubplotError {
     #[error("Couldn't find name of directory containing template spec: {0}")]
     NoTemplateSpecDirectory(PathBuf),
 
+    /// A code template has an error.
+    #[error("Couldn't load template {0}: {1}")]
+    TemplateError(String, tera::Error),
+
     /// Unknown classes in use in document
     #[error("Unknown classes found in the document: {0}")]
     UnknownClasses(String),