(ctx context.Context, cache string, expected string)
| 114 | } |
| 115 | |
| 116 | func (r *Runner) loadAndCompileWASM(ctx context.Context, cache string, expected string) (*runtimeAndCode, error) { |
| 117 | pluginDir := filepath.Join(cache, expected) |
| 118 | pluginPath := filepath.Join(pluginDir, "plugin.wasm") |
| 119 | _, staterr := os.Stat(pluginPath) |
| 120 | |
| 121 | uri := r.URL |
| 122 | if staterr == nil { |
| 123 | uri = "file://" + pluginPath |
| 124 | } |
| 125 | |
| 126 | wmod, actual, err := r.fetch(ctx, uri) |
| 127 | if err != nil { |
| 128 | return nil, err |
| 129 | } |
| 130 | |
| 131 | if expected != actual { |
| 132 | return nil, fmt.Errorf("invalid checksum: expected %s, got %s", expected, actual) |
| 133 | } |
| 134 | |
| 135 | if staterr != nil { |
| 136 | err := os.Mkdir(pluginDir, 0755) |
| 137 | if err != nil && !os.IsExist(err) { |
| 138 | return nil, fmt.Errorf("mkdirall: %w", err) |
| 139 | } |
| 140 | if err := os.WriteFile(pluginPath, wmod, 0444); err != nil { |
| 141 | return nil, fmt.Errorf("cache wasm: %w", err) |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | wazeroCache, err := wazero.NewCompilationCacheWithDir(filepath.Join(cache, "wazero")) |
| 146 | if err != nil { |
| 147 | return nil, fmt.Errorf("wazero.NewCompilationCacheWithDir: %w", err) |
| 148 | } |
| 149 | |
| 150 | config := wazero.NewRuntimeConfig().WithCompilationCache(wazeroCache) |
| 151 | rt := wazero.NewRuntimeWithConfig(ctx, config) |
| 152 | |
| 153 | if _, err := wasi_snapshot_preview1.Instantiate(ctx, rt); err != nil { |
| 154 | return nil, fmt.Errorf("wasi_snapshot_preview1 instantiate: %w", err) |
| 155 | } |
| 156 | |
| 157 | // Compile the Wasm binary once so that we can skip the entire compilation |
| 158 | // time during instantiation. |
| 159 | code, err := rt.CompileModule(ctx, wmod) |
| 160 | if err != nil { |
| 161 | return nil, fmt.Errorf("compile module: %w", err) |
| 162 | } |
| 163 | |
| 164 | return &runtimeAndCode{rt: rt, code: code}, nil |
| 165 | } |
| 166 | |
| 167 | // removePGCatalog removes the pg_catalog schema from the request. There is a |
| 168 | // mysterious (reason unknown) bug with wasm plugins when a large amount of |
no test coverage detected