dependencies: Set tough-cookie as optional dependency

index.js

@@ -12,9 +12,10 @@
 //    See the License for the specific language governing permissions and
 //    limitations under the License.
 
-var Cookie = require('tough-cookie')
-  , CookieJar = Cookie.CookieJar
-  , cookieJar = new CookieJar
+var optional = require('./lib/optional')
+  , Cookie = optional('tough-cookie')
+  , CookieJar = Cookie && Cookie.CookieJar
+  , cookieJar = CookieJar && new CookieJar
 
   , copy = require('./lib/copy')
   , Request = require('./request')

package.json

@@ -24,11 +24,11 @@
     "qs": "~0.6.0",
     "json-stringify-safe": "~5.0.0",
     "forever-agent": "~0.5.0",
-    "tough-cookie": "~0.9.15",
     "node-uuid": "~1.4.0",
     "mime": "~1.2.9"
   },
   "optionalDependencies": {
+    "tough-cookie": "~0.9.15",
     "form-data": "~0.1.0",
     "tunnel-agent": "~0.3.0",
     "http-signature": "~0.10.0",

request.js

@@ -21,9 +21,9 @@ var optional = require('./lib/optional')
   , ForeverAgent = require('forever-agent')
   , FormData = optional('form-data')
 
-  , Cookie = require('tough-cookie')
-  , CookieJar = Cookie.CookieJar
-  , cookieJar = new CookieJar
+  , Cookie = optional('tough-cookie')
+  , CookieJar = Cookie && Cookie.CookieJar
+  , cookieJar = CookieJar && new CookieJar
 
   , copy = require('./lib/copy')
   , debug = require('./lib/debug')

tests/test-follow-all.js

@@ -1,3 +1,11 @@
+try {
+  require('tough-cookie')
+} catch (e) {
+  console.error('tough-cookie must be installed to run this test.')
+  console.error('skipping this test. please install tough-cookie and run again if you need to test this feature.')
+  process.exit(0)
+}
+
 var request = require('../index');
 var http = require('http');
 var requests = 0;

tests/test-headers.js

@@ -1,3 +1,11 @@
+try {
+  require('tough-cookie')
+} catch (e) {
+  console.error('tough-cookie must be installed to run this test.')
+  console.error('skipping this test. please install tough-cookie and run again if you need to test this feature.')
+  process.exit(0)
+}
+
 var server = require('./server')
   , assert = require('assert')
   , request = require('../index')

tests/test-redirect.js

@@ -1,3 +1,11 @@
+try {
+  require('tough-cookie')
+} catch (e) {
+  console.error('tough-cookie must be installed to run this test.')
+  console.error('skipping this test. please install tough-cookie and run again if you need to test this feature.')
+  process.exit(0)
+}
+
 var server = require('./server')
   , assert = require('assert')
   , request = require('../index')