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-rw-r--r--packages/sol-compiler/src/compiler.ts22
-rw-r--r--packages/sol-compiler/src/utils/fs_wrapper.ts1
2 files changed, 19 insertions, 4 deletions
diff --git a/packages/sol-compiler/src/compiler.ts b/packages/sol-compiler/src/compiler.ts
index 296411b76..d3c4a3919 100644
--- a/packages/sol-compiler/src/compiler.ts
+++ b/packages/sol-compiler/src/compiler.ts
@@ -82,6 +82,18 @@ export class Compiler {
private readonly _artifactsDir: string;
private readonly _solcVersionIfExists: string | undefined;
private readonly _specifiedContracts: string[] | TYPE_ALL_FILES_IDENTIFIER;
+ private static async _doesFileExistAsync(filePath: string): Promise<boolean> {
+ try {
+ await fsWrapper.accessAsync(
+ filePath,
+ // node says we need to use bitwise, but tslint says no:
+ fs.constants.F_OK | fs.constants.R_OK, // tslint:disable-line:no-bitwise
+ );
+ } catch (err) {
+ return false;
+ }
+ return true;
+ }
private static async _getSolcAsync(
solcVersion: string,
): Promise<{ solcInstance: solc.SolcInstance; fullSolcVersion: string }> {
@@ -91,9 +103,8 @@ export class Compiler {
}
const compilerBinFilename = path.join(SOLC_BIN_DIR, fullSolcVersion);
let solcjs: string;
- const isCompilerAvailableLocally = fs.existsSync(compilerBinFilename);
- if (isCompilerAvailableLocally) {
- solcjs = fs.readFileSync(compilerBinFilename).toString();
+ if (await Compiler._doesFileExistAsync(compilerBinFilename)) {
+ solcjs = (await fsWrapper.readFileAsync(compilerBinFilename)).toString();
} else {
logUtils.log(`Downloading ${fullSolcVersion}...`);
const url = `${constants.BASE_COMPILER_URL}${fullSolcVersion}`;
@@ -103,7 +114,10 @@ export class Compiler {
throw new Error(`Failed to load ${fullSolcVersion}`);
}
solcjs = await response.text();
- fs.writeFileSync(compilerBinFilename, solcjs);
+ await fsWrapper.writeFileAsync(compilerBinFilename, solcjs);
+ }
+ if (solcjs.length === 0) {
+ throw new Error('No compiler available');
}
const solcInstance = solc.setupMethods(requireFromString(solcjs, compilerBinFilename));
return { solcInstance, fullSolcVersion };
diff --git a/packages/sol-compiler/src/utils/fs_wrapper.ts b/packages/sol-compiler/src/utils/fs_wrapper.ts
index 6e3547a76..44c97bd1e 100644
--- a/packages/sol-compiler/src/utils/fs_wrapper.ts
+++ b/packages/sol-compiler/src/utils/fs_wrapper.ts
@@ -12,4 +12,5 @@ export const fsWrapper = {
removeFileAsync: promisify<undefined>(fs.unlink),
statAsync: promisify<fs.Stats>(fs.stat),
appendFileAsync: promisify<undefined>(fs.appendFile),
+ accessAsync: promisify<boolean>(fs.access),
};