Fix --cache-dir with Docker

lib/docker.js

@@ -101,4 +101,16 @@ function getBindPath(servicePath) {
   throw new Error('Unable to find good bind path format');
 };
 
-module.exports = {buildImage, getBindPath};
+/**
+ * Find out what uid the docker machine is using
+ * @param {string} bindPath
+ * @return {boolean}
+ */
+function getDockerUid(bindPath) {
+  const options = ['run', '--rm', '-v', `${bindPath}:/test`,
+    'alpine', 'stat', '-c', '%u', '/test/.serverless'];
+  const ps = dockerCommand(options);
+  return ps.stdout.trim();
+};
+
+module.exports = {buildImage, getBindPath, getDockerUid};

lib/pip.js

@@ -3,9 +3,8 @@ const path = require('path');
 const get = require('lodash.get');
 const set = require('lodash.set');
 const {spawnSync} = require('child_process');
-const {quote} = require('shell-quote');
 const values = require('lodash.values');
-const {buildImage, getBindPath} = require('./docker');
+const {buildImage, getBindPath, getDockerUid} = require('./docker');
 
 /**
  * Install requirements described in requirementsPath to targetPath
@@ -82,19 +81,17 @@ function installRequirements(requirementsPath, targetFolder, serverless, service
       cmdOptions.push('-e', 'SSH_AUTH_SOCK=/tmp/ssh_sock');
     }
     if (process.platform === 'linux') {
-      // Set the ownership of the .serverless/requirements folder to current user
-      pipCmd = quote(pipCmd);
-      const chownCmd = quote([
-        'chown', '-R', `${process.getuid()}:${process.getgid()}`,
-        targetRequirementsFolder,
-      ]);
-      pipCmd = ['/bin/bash', '-c', '"' + pipCmd + ' && ' + chownCmd + '"'];
+      // Use same user so requirements folder is not root and so --cache-dir works
+      cmdOptions.push('-u', `${process.getuid()}`);
       // const stripCmd = quote([
       //   'find', targetRequirementsFolder,
       //   '-name', '"*.so"',
       //   '-exec', 'strip', '{}', '\;',
       // ]);
       // pipCmd = ['/bin/bash', '-c', '"' + pipCmd + ' && ' + stripCmd + ' && ' + chownCmd + '"'];
+    } else {
+      // Use same user so --cache-dir works
+      cmdOptions.push('-u', getDockerUid(bindPath));
     }
     cmdOptions.push(dockerImage);
     cmdOptions.push(...pipCmd);

package.json

@@ -54,7 +54,6 @@
     "lodash.get": "^4.4.2",
     "lodash.set": "^4.3.2",
     "lodash.values": "^4.3.0",
-    "shell-quote": "^1.6.1",
     "zip-local": "^0.3.4"
   }
 }

test.bats

@@ -3,6 +3,10 @@
 
 setup() {
     export SLS_DEBUG=t
+    if ! [ -z "$CI" ]; then
+        export LC_ALL=C.UTF-8
+        export LANG=C.UTF-8
+    fi
 
     cd test
 
@@ -11,7 +15,7 @@ setup() {
 
 teardown() {
     sls requirements clean
-    rm -rf puck puck2 puck3 node_modules .serverless
+    rm -rf puck puck2 puck3 node_modules .serverless .requirements.zip .requirements-cache
     if [ -f serverless.yml.bak ]; then mv serverless.yml.bak serverless.yml; fi
 }
 
@@ -58,6 +62,14 @@ teardown() {
     ls puck/flask
 }
 
+@test "py3.6 uses cache with dockerizePip option" {
+    [ -z "$CIRCLE_BRANCH" ] || skip "Volumes are weird in CircleCI https://circleci.com/docs/2.0/building-docker-images/#mounting-folders"
+    ! uname -sm|grep Linux || groups|grep docker || id -u|egrep '^0$' || skip "can't dockerize on linux if not root & not in docker group"
+    perl -p -i'.bak' -e 's/(pythonRequirements:$)/\1\n    pipCmdExtraArgs: ["--cache-dir", ".requirements-cache"]/' serverless.yml
+    sls --dockerizePip=true package
+    ls .requirements-cache/http
+}
+
 @test "py2.7 can package flask with default options" {
     sls --runtime=python2.7 package
     unzip .serverless/sls-py-req-test.zip -d puck