Fix execution in CI

crates/solidity/outputs/cargo/tests/src/bindings_output/runner.rs

@@ -6,6 +6,7 @@ use anyhow::Result;
 use ariadne::{Color, Config, Label, Report, ReportBuilder, ReportKind, Source};
 use infra_utils::cargo::CargoWorkspace;
 use infra_utils::codegen::CodegenFileSystem;
+use infra_utils::github::GitHub;
 use infra_utils::paths::PathExtensions;
 use metaslang_bindings::builder;
 use metaslang_graph_builder::ast::File;
@@ -39,16 +40,21 @@ pub fn run(group_name: &str, test_name: &str) -> Result<()> {
 
         let parse_output = language.parse(Language::ROOT_KIND, &source);
 
-        let graph_output = output_graph(version, &parse_output)?;
-        match last_graph_output {
-            Some(ref last) if last == &graph_output => (),
-            _ => {
-                let snapshot_path = test_dir.join("generated").join(format!("{version}.mmd"));
-
-                fs.write_file(snapshot_path, &graph_output)?;
-                last_graph_output = Some(graph_output);
-            }
-        };
+        if !GitHub::is_running_in_ci() {
+            // Don't run this in CI, since the graph outputs are not committed
+            // to the repository and hence we cannot verify their contents,
+            // which is what `fs.write_file` does in CI.
+            let graph_output = output_graph(version, &parse_output)?;
+            match last_graph_output {
+                Some(ref last) if last == &graph_output => (),
+                _ => {
+                    let snapshot_path = test_dir.join("generated").join(format!("{version}.mmd"));
+
+                    fs.write_file(snapshot_path, &graph_output)?;
+                    last_graph_output = Some(graph_output);
+                }
+            };
+        }
 
         let bindings_output = output_bindings(version, &parse_output, &source, &input_path)?;
         match last_bindings_output {