4 files changed, 74 insertions, 18 deletions
diff --git a/packages/deployer/src/utils/compiler.ts b/packages/deployer/src/utils/compiler.ts
index d5137d394..600495693 100644
--- a/packages/deployer/src/utils/compiler.ts
+++ b/packages/deployer/src/utils/compiler.ts
@@ -1,3 +1,4 @@
+import { AbiType, ContractAbi, MethodAbi } from '@0xproject/types';
 import { logUtils } from '@0xproject/utils';
 import * as _ from 'lodash';
 import * as path from 'path';
@@ -5,9 +6,49 @@ import * as solc from 'solc';
 
 import { constants } from './constants';
 import { fsWrapper } from './fs_wrapper';
-import { ContractArtifact, ContractSources } from './types';
+import { ContractArtifact, ContractSources, FunctionNameToSeenCount } from './types';
 
 /**
+ * Constructs a system-wide unique identifier for a source file.
+ * @param directoryNamespace Namespace of the source file's root contract directory.
+ * @param sourceFilePath Path to a source file, relative to contractBaseDir.
+ * @return sourceFileId A system-wide unique identifier for the source file.
+ */
+export function constructUniqueSourceFileId(directoryNamespace: string, sourceFilePath: string): string {
+    const namespacePrefix = !_.isEmpty(directoryNamespace) ? `/${directoryNamespace}` : '';
+    const sourceFilePathNoLeadingSlash = sourceFilePath.replace(/^\/+/g, '');
+    const sourceFileId = `${namespacePrefix}/${sourceFilePathNoLeadingSlash}`;
+    return sourceFileId;
+}
+/**
+ * Constructs a system-wide unique identifier for a dependency file.
+ * @param dependencyFilePath Path from a sourceFile to a dependency.
+ * @param  contractBaseDir Base contracts directory of search tree.
+ * @return sourceFileId A system-wide unique identifier for the source file.
+ */
+export function constructDependencyFileId(dependencyFilePath: string, sourceFilePath: string): string {
+    if (_.startsWith(dependencyFilePath, '/')) {
+        // Path of the form /namespace/path/to/dependency.sol
+        return dependencyFilePath;
+    } else {
+        // Dependency is relative to the source file: ./dependency.sol, ../../some/path/dependency.sol, etc.
+        // Join the two paths to construct a valid source file id: /namespace/path/to/dependency.sol
+        return path.join(path.dirname(sourceFilePath), dependencyFilePath);
+    }
+}
+/**
+ * Constructs a system-wide unique identifier for a contract.
+ * @param directoryNamespace Namespace of the source file's root contract directory.
+ * @param sourceFilePath Path to a source file, relative to contractBaseDir.
+ * @return sourceFileId A system-wide unique identifier for contract.
+ */
+export function constructContractId(directoryNamespace: string, sourceFilePath: string): string {
+    const namespacePrefix = !_.isEmpty(directoryNamespace) ? `${directoryNamespace}:` : '';
+    const sourceFileName = path.basename(sourceFilePath, constants.SOLIDITY_FILE_EXTENSION);
+    const contractId = `${namespacePrefix}${sourceFileName}`;
+    return contractId;
+}
+/**
  * Gets contract data on network or returns if an artifact does not exist.
  * @param artifactsDir Path to the artifacts directory.
  * @param fileName Name of contract file.
@@ -82,9 +123,10 @@ export function getNormalizedErrMsg(errMsg: string): string {
 /**
  * Parses the contract source code and extracts the dendencies
  * @param  source Contract source code
+ * @param sourceFilePath File path of the source code.
  * @return List of dependendencies
  */
-export function parseDependencies(source: string): string[] {
+export function parseDependencies(source: string, sourceFileId: string): string[] {
     // TODO: Use a proper parser
     const IMPORT_REGEX = /(import\s)/;
     const DEPENDENCY_PATH_REGEX = /"([^"]+)"/; // Source: https://github.com/BlockChainCompany/soljitsu/blob/master/lib/shared.js
@@ -95,8 +137,8 @@ export function parseDependencies(source: string): string[] {
             const dependencyMatch = line.match(DEPENDENCY_PATH_REGEX);
             if (!_.isNull(dependencyMatch)) {
                 const dependencyPath = dependencyMatch[1];
-                const basenName = path.basename(dependencyPath);
-                dependencies.push(basenName);
+                const dependencyId = constructDependencyFileId(dependencyPath, sourceFileId);
+                dependencies.push(dependencyId);
             }
         }
     });
@@ -107,14 +149,19 @@ export function parseDependencies(source: string): string[] {
  * Callback to resolve dependencies with `solc.compile`.
  * Throws error if contractSources not yet initialized.
  * @param  contractSources Source codes of contracts.
- * @param  importPath Path to an imported dependency.
+ * @param  sourceFileId ID of the source file.
+ * @param  importPath Path of dependency source file.
  * @return Import contents object containing source code of dependency.
  */
-export function findImportIfExist(contractSources: ContractSources, importPath: string): solc.ImportContents {
-    const fileName = path.basename(importPath);
-    const source = contractSources[fileName];
+export function findImportIfExist(
+    contractSources: ContractSources,
+    sourceFileId: string,
+    importPath: string,
+): solc.ImportContents {
+    const dependencyFileId = constructDependencyFileId(importPath, sourceFileId);
+    const source = contractSources[dependencyFileId];
     if (_.isUndefined(source)) {
-        throw new Error(`Contract source not found for ${fileName}`);
+        throw new Error(`Contract source not found for ${dependencyFileId}`);
     }
     const importContents: solc.ImportContents = {
         contents: source,
diff --git a/packages/deployer/src/utils/contract.ts b/packages/deployer/src/utils/contract.ts
index 9b7baac11..e8dd5218a 100644
--- a/packages/deployer/src/utils/contract.ts
+++ b/packages/deployer/src/utils/contract.ts
@@ -1,11 +1,9 @@
 import { schemas, SchemaValidator } from '@0xproject/json-schemas';
-import { ContractAbi, EventAbi, FunctionAbi, MethodAbi, TxData } from '@0xproject/types';
+import { AbiType, ContractAbi, EventAbi, FunctionAbi, MethodAbi, TxData } from '@0xproject/types';
 import { promisify } from '@0xproject/utils';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
-import { AbiType } from './types';
-
 export class Contract implements Web3.ContractInstance {
     public address: string;
     public abi: ContractAbi;
diff --git a/packages/deployer/src/utils/encoder.ts b/packages/deployer/src/utils/encoder.ts
index 4f62662e1..806efbbca 100644
--- a/packages/deployer/src/utils/encoder.ts
+++ b/packages/deployer/src/utils/encoder.ts
@@ -1,9 +1,7 @@
-import { AbiDefinition, ContractAbi, DataItem } from '@0xproject/types';
+import { AbiDefinition, AbiType, ContractAbi, DataItem } from '@0xproject/types';
 import * as _ from 'lodash';
 import * as web3Abi from 'web3-eth-abi';
 
-import { AbiType } from './types';
-
 export const encoder = {
     encodeConstructorArgsFromAbi(args: any[], abi: ContractAbi): string {
         const constructorTypes: string[] = [];
diff --git a/packages/deployer/src/utils/types.ts b/packages/deployer/src/utils/types.ts
index 7d131f5ce..1a866b873 100644
--- a/packages/deployer/src/utils/types.ts
+++ b/packages/deployer/src/utils/types.ts
@@ -18,6 +18,11 @@ export interface ContractNetworks {
     [key: number]: ContractNetworkData;
 }
 
+export interface ContractDirectory {
+    path: string;
+    namespace: string;
+}
+
 export interface ContractNetworkData {
     solc_version: string;
     optimizer_enabled: boolean;
@@ -40,7 +45,7 @@ export interface SolcErrors {
 
 export interface CliOptions extends yargs.Arguments {
     artifactsDir: string;
-    contractsDir: string;
+    contractDirs: string;
     jsonrpcUrl: string;
     networkId: number;
     shouldOptimize: boolean;
@@ -51,7 +56,7 @@ export interface CliOptions extends yargs.Arguments {
 }
 
 export interface CompilerOptions {
-    contractsDir: string;
+    contractDirs: Set<ContractDirectory>;
     networkId: number;
     optimizerEnabled: boolean;
     artifactsDir: string;
@@ -78,7 +83,11 @@ export interface ContractSources {
     [key: string]: string;
 }
 
-export interface ContractSourceData {
+export interface ContractIdToSourceFileId {
+    [key: string]: string;
+}
+
+export interface ContractSourceDataByFileId {
     [key: string]: ContractSpecificSourceData;
 }
 
@@ -98,4 +107,8 @@ export interface Token {
     swarmHash: string;
 }
 
+export interface FunctionNameToSeenCount {
+    [key: string]: number;
+}
+
 export type DoneCallback = (err?: Error) => void;