Add flag for saving standard input during compilation

packages/sol-compiler/src/compiler.ts

@@ -49,6 +49,8 @@ const DEFAULT_CONTRACTS_DIR = path.resolve('contracts');
 const DEFAULT_ARTIFACTS_DIR = path.resolve('artifacts');
 const DEFAULT_USE_DOCKERISED_SOLC = false;
 const DEFAULT_IS_OFFLINE_MODE = false;
+const DEFAULT_SHOULD_SAVE_STANDARD_INPUT = false;
+
 // Solc compiler settings cannot be configured from the commandline.
 // If you need this configured, please create a `compiler.json` config file
 // with your desired configurations.
@@ -95,6 +97,7 @@ export class Compiler {
     private readonly _specifiedContracts: string[] | TYPE_ALL_FILES_IDENTIFIER;
     private readonly _useDockerisedSolc: boolean;
     private readonly _isOfflineMode: boolean;
+    private readonly _shouldSaveStandardInput: boolean;
     /**
      * Instantiates a new instance of the Compiler class.
      * @param opts Optional compiler options
@@ -123,6 +126,8 @@ export class Compiler {
         this._useDockerisedSolc =
             passedOpts.useDockerisedSolc || config.useDockerisedSolc || DEFAULT_USE_DOCKERISED_SOLC;
         this._isOfflineMode = passedOpts.isOfflineMode || config.isOfflineMode || DEFAULT_IS_OFFLINE_MODE;
+        this._shouldSaveStandardInput =
+            passedOpts.shouldSaveStandardInput || config.shouldSaveStandardInput || DEFAULT_SHOULD_SAVE_STANDARD_INPUT;
         this._nameResolver = new NameResolver(this._contractsDir);
         const resolver = new FallthroughResolver();
         resolver.appendResolver(new URLResolver());
@@ -327,7 +332,12 @@ export class Compiler {
                         `Contract ${contractName} not found in ${contractPath}. Please make sure your contract has the same name as it's file name`,
                     );
                 }
-
+                if (this._shouldSaveStandardInput) {
+                    await fsWrapper.writeFileAsync(
+                        `${this._contractsDir}/${contractName}.input.json`,
+                        utils.stringifyWithFormatting(input.standardInput),
+                    );
+                }
                 addHexPrefixToContractBytecode(compiledContract);
 
                 if (shouldPersist) {