Drop handlebars for upon

- `upon` is faster, see benchmarks https://github.com/rossmacarthur/upon
- `upon` is more lightweight
- I prefer the block syntax `{% for file in files %} ...`

Cargo.toml

@@ -28,7 +28,6 @@ curl = "0.4.43"
 fmutex = "0.1.0"
 git2 = { version = "0.14.4", features = ["vendored-libgit2"] }
 globwalk = "0.8.1"
-handlebars = "4.3.1"
 home = "0.5.3"
 indexmap = { version = "1.9.1", features = ["rayon", "serde"] }
 itertools = "0.10.3"
@@ -40,6 +39,7 @@ serde = { version = "1.0.139", features = ["derive"] }
 thiserror = "1.0.31"
 toml = { version = "0.5.9", features = ["preserve_order"] }
 toml_edit = "0.14.4"
+upon = { version = "0.4.0", default-features = false, features = ["serde"] }
 url = { version = "2.2.2", features = ["serde"] }
 walkdir = "2.3.2"
 which = { version = "4.2.5", default-features = false }
@@ -48,7 +48,7 @@ which = { version = "4.2.5", default-features = false }
 anyhow = "1.0.58"
 
 [dev-dependencies]
-goldie = "0.3.0"
+goldie = "0.4.1"
 pest = "2.1.3"
 pest_derive = "2.1.0"
 pretty_assertions = "1.2.1"

README.md

@@ -18,8 +18,7 @@
 - Arbitrary remote scripts or binary plugins.
 - Local plugins.
 - Inline plugins.
-- Highly configurable install methods using
-  [handlebars](http://handlebarsjs.com) templating.
+- Highly configurable install methods using templates.
 - Shell agnostic, with sensible defaults for Zsh.
 - Super-fast plugin loading and parallel installation. See [benchmarks].
 - Config file using [TOML](https://toml.io) syntax.

docs/README.hbs → docs/README_TEMPLATE.md

@@ -1,3 +1,5 @@
+<!-- automatically generated by `cargo run --package gen-readme` -->
+
 # sheldon
 
 *Fast, configurable, shell plugin manager*
@@ -16,8 +18,7 @@
 - Arbitrary remote scripts or binary plugins.
 - Local plugins.
 - Inline plugins.
-- Highly configurable install methods using
-  [handlebars](http://handlebarsjs.com) templating.
+- Highly configurable install methods using templates.
 - Shell agnostic, with sensible defaults for Zsh.
 - Super-fast plugin loading and parallel installation. See [benchmarks].
 - Config file using [TOML](https://toml.io) syntax.
@@ -27,11 +28,11 @@
 
 ## Table of Contents
 
-{{{ toc ~}}}
+{{ toc -}}
 - [💡 Examples](#-examples)
 - [License](#license)
 
-{{{ contents }}}
+{{ contents }}
 
 ## 💡 Examples
 

docs/src/Introduction.md

@@ -5,8 +5,7 @@ Sheldon is a fast, configurable, command-line tool to manage your shell plugins.
 ## How does it work?
 
 Plugins are specified in a [TOML](https://toml.io) configuration file and
-Sheldon renders an install script using user configurable
-[handlebars](http://handlebarsjs.com) templates.
+Sheldon renders an install script using user configurable templates.
 
 A `~/.zshrc` or `~/.bashrc` that uses Sheldon simply contains the following.
 

src/cli/testdata/raw_opt_help.golden

@@ -1,4 +1,4 @@
-sheldon {version}
+sheldon {{ version }}
 Ross MacArthur <ross@macarthur.io>
 Fast, configurable, shell plugin manager.
 

src/cli/tests.rs

@@ -3,7 +3,6 @@ use super::*;
 use std::iter;
 
 use pretty_assertions::assert_eq;
-use serde::Serialize;
 
 use crate::cli::color_choice::ColorChoice;
 
@@ -49,16 +48,7 @@ fn raw_opt_long_version() {
 #[test]
 fn raw_opt_help() {
     setup();
-
-    #[derive(Serialize)]
-    struct Context {
-        version: &'static str,
-    }
-
-    let ctx = Context {
-        version: build::CRATE_RELEASE,
-    };
-
+    let ctx = upon::value! { version: build::CRATE_RELEASE };
     for opt in &["-h", "--help"] {
         let err = raw_opt_err(&[opt]);
         goldie::assert_template!(&ctx, err.to_string());

src/config/normalize.rs

@@ -9,6 +9,7 @@ use url::Url;
 
 use crate::config::file::{GitProtocol, RawConfig, RawPlugin};
 use crate::config::{Config, ExternalPlugin, InlinePlugin, Plugin, Shell, Source, Template};
+use crate::util::TEMPLATE_ENGINE;
 
 /// The Gist domain host.
 const GIST_HOST: &str = "gist.github.com";
@@ -31,9 +32,10 @@ pub fn normalize(raw_config: RawConfig, warnings: &mut Vec<Error>) -> Result<Con
         warnings.push(anyhow!("unused config key: `{}`", key))
     });
 
+    // Check that the templates can be compiled.
     for (name, template) in &templates {
-        // Check that the templates can be compiled.
-        handlebars::Template::compile(&template.value)
+        TEMPLATE_ENGINE
+            .compile(&template.value)
             .with_context(s!("failed to compile template `{}`", name))?;
     }
 

src/context.rs

@@ -185,7 +185,7 @@ impl ToMessage for &Path {
 pub fn log_error(no_color: bool, color: Color, prefix: &str, err: &Error) {
     let pretty = err
         .chain()
-        .map(|c| c.to_string().replace("Template error: ", ""))
+        .map(|c| c.to_string())
         .collect::<Vec<_>>()
         .join("\n  due to: ");
     if no_color {

src/lock/plugin.rs

@@ -3,11 +3,13 @@ use std::path::{Path, PathBuf};
 use anyhow::{bail, Context as ResultExt, Result};
 use indexmap::IndexMap;
 use maplit::hashmap;
+use serde::Serialize;
 
 use crate::config::{ExternalPlugin, Source, Template};
 use crate::context::Context;
 use crate::lock::file::LockedExternalPlugin;
 use crate::lock::source::LockedSource;
+use crate::util::TEMPLATE_ENGINE;
 
 /// Consume the [`ExternalPlugin`] and convert it to a [`LockedExternalPlugin`].
 pub fn lock(
@@ -39,10 +41,6 @@ pub fn lock(
             apply,
         }
     } else {
-        // Handlebars instance to do the rendering
-        let mut hbs = handlebars::Handlebars::new();
-        hbs.set_strict_mode(true);
-
         // Data to use in template rendering
         let mut data = hashmap! {
             "data_dir" => ctx
@@ -54,9 +52,7 @@ pub fn lock(
 
         let source_dir = locked_source.dir;
         let plugin_dir = if let Some(dir) = dir {
-            let rendered = hbs
-                .render_template(&dir, &data)
-                .with_context(s!("failed to render template `{}`", dir))?;
+            let rendered = render_template(&dir, &data)?;
             Some(source_dir.join(rendered))
         } else {
             None
@@ -73,20 +69,15 @@ pub fn lock(
         if let Some(uses) = &uses {
             let patterns = uses
                 .iter()
-                .map(|u| {
-                    hbs.render_template(u, &data)
-                        .with_context(s!("failed to render template `{}`", u))
-                })
+                .map(|u| render_template(u, &data))
                 .collect::<Result<Vec<_>>>()?;
             if !match_globs(dir, &patterns, &mut files)? {
                 bail!("failed to find any files matching any of `{:?}`", patterns);
             }
         // Otherwise we try to figure out which files to use...
         } else {
             for g in global_matches {
-                let pattern = hbs
-                    .render_template(g, &data)
-                    .with_context(s!("failed to render template `{}`", g))?;
+                let pattern = render_template(g, &data)?;
                 if match_globs(dir, &[pattern], &mut files)? {
                     break;
                 }
@@ -110,6 +101,17 @@ pub fn lock(
     })
 }
 
+fn render_template<S>(template: &str, ctx: S) -> Result<String>
+where
+    S: Serialize,
+{
+    TEMPLATE_ENGINE
+        .compile(template)
+        .with_context(s!("failed to compile template `{}`", template))?
+        .render(ctx)
+        .with_context(s!("failed to render template `{}`", template))
+}
+
 fn match_globs(dir: &Path, patterns: &[String], files: &mut Vec<PathBuf>) -> Result<bool> {
     let debug = || {
         patterns