[crater] Actually run gftools mode

This will only run gftools mode for fonts using the default
recipeProvider.

fontc_crater/Cargo.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 [dependencies]
 fontc = { version = "0.0.1", path = "../fontc" }
 
-google-fonts-sources = "0.5.0"
+google-fonts-sources = "0.5.1"
 maud = "0.26.0"
 tidier = "0.5.3"
 

fontc_crater/src/ci.rs

@@ -18,7 +18,7 @@ use crate::{
     args::CiArgs,
     error::Error,
     ttx_diff_runner::{DiffError, DiffOutput},
-    Results, Target,
+    BuildType, Results, Target,
 };
 
 mod html;
@@ -176,12 +176,46 @@ fn make_targets(cache_dir: &Path, repos: &[RepoInfo]) -> (Vec<Target>, BTreeMap<
                     .expect("source is always in cache dir")
                     .to_path_buf();
                 repo_list.insert(src_path.clone(), repo.repo_url.clone());
-                targets.push(Target {
-                    _config: config_path.to_owned(),
-                    source: src_path,
-                })
+                targets.extend(targets_for_source(&src_path, &config_path, &config))
             }
         }
     }
     (targets, repo_list)
 }
+
+fn targets_for_source(
+    src_path: &Path,
+    config_path: &Path,
+    config: &Config,
+) -> impl Iterator<Item = Target> {
+    let default = Some(Target {
+        config: config_path.to_owned(),
+        source: src_path.to_owned(),
+        build: BuildType::Default,
+    });
+
+    let gftools = should_build_in_gftools_mode(src_path, config).then(|| Target {
+        config: config_path.to_owned(),
+        source: src_path.to_owned(),
+        build: BuildType::GfTools,
+    });
+    [default, gftools].into_iter().flatten()
+}
+
+fn should_build_in_gftools_mode(src_path: &Path, config: &Config) -> bool {
+    // skip noto, which have an implicitly different recipe provider
+    if src_path
+        .file_stem()
+        .and_then(|stem| stem.to_str().map(|s| s.to_lowercase().contains("noto")))
+        .unwrap_or(false)
+    {
+        return false;
+    }
+
+    // if there is a recipe provider other than googlefonts, we skip
+    config
+        .recipe_provider
+        .as_ref()
+        .filter(|provider| *provider != "googlefonts")
+        .is_none()
+}