Add support for lein checkouts

- Add checkouts source directories to the classpath
- Add checkouts source directories to :source-paths

This follows roughly the same pattern as cljsbuild in
emezeske/lein-cljsbuild#374

Fixes #9

plugin/src/leiningen/figwheel.clj

@@ -3,12 +3,15 @@
   (:require
    #_[clojure.pprint :as pp]
    [leiningen.core.eval :as leval]
+   [leiningen.core.project :as lproject]
    [leiningen.clean :as clean]
    [leiningen.core.main :as main]
    [clojure.java.io :as io]
    [clojure.set :refer [intersection]]
    [leiningen.figwheel.fuzzy :as fuz]
-   [simple-lein-profile-merge.core :as lm]))
+   [simple-lein-profile-merge.core :as lm])
+  (:import (java.io File)
+           (java.nio.file Path)))
 
 (def _figwheel-version_ "0.5.15-SNAPSHOT")
 
@@ -284,6 +287,17 @@
   (when (every? not-empty args)
     (not-empty (apply intersection (map set args)))))
 
+(defn checkout-source-paths
+  "Get source paths for all of the lein projects that are in the checkouts directory."
+  [project]
+  (let [checkout-projects (lproject/read-checkouts project)
+        checkout-sources (for [co-project checkout-projects
+                               build (conj (get-in co-project [:cljsbuild :builds]) co-project) ;; Use the :source-paths of the project too.
+                               source-path (:source-paths build)]
+                           (str (.relativize (.toPath (io/file (:root project)))
+                                             (.toPath (io/file source-path)))))]
+    (distinct checkout-sources)))
+
 (defn source-paths-for-classpath [{:keys [figwheel-options all-builds build-ids] :as data}]
   (if-not (and all-builds (not-empty all-builds))
     []
@@ -396,23 +410,36 @@
    (fuzzy-config-from-project project)
    {:no-start-option true}))
 
+(defn add-checkouts [project]
+  (let [checkout-paths (checkout-source-paths project)]
+    (update-in
+      project
+      [:cljsbuild :builds]
+      (fn [builds]
+        (into {}
+              (map (fn [[k build]]
+                     [k (update build :source-paths concat checkout-paths)])
+                   builds))))))
+
 (defn build-once [project build-ids]
   (when-not (report-if-bad-build-ids project build-ids)
-    (run-build-once
-     project
-     (fuzzy-config-from-project project)
-     (source-paths-for-classpath
-      (normalize-data project build-ids))
-     (vec build-ids))))
+    (let [project (add-checkouts project)]
+      (run-build-once
+        project
+        (fuzzy-config-from-project project)
+        (source-paths-for-classpath
+          (normalize-data project build-ids))
+        (vec build-ids)))))
 
 (defn figwheel-main [project build-ids]
   (when-not (report-if-bad-build-ids project build-ids)
-    (run-figwheel
-     project
-     (fuzzy-config-from-project project)
-     (source-paths-for-classpath
-      (normalize-data project build-ids))
-     (vec build-ids))))
+    (let [project (add-checkouts project)]
+      (run-figwheel
+        project
+        (-> project fuzzy-config-from-project)
+        (source-paths-for-classpath
+          (normalize-data project build-ids))
+        (vec build-ids)))))
 
 (defmulti fig-dispatch (fn [command _ _] command))
 

plugin/test/leiningen/figwheel_test.clj

@@ -136,3 +136,13 @@
 
 
 
+
+(deftest add-checkouts-test
+  (is (= ["src" "../../src" "checkouts/abc/src"]
+         (get-in
+           (f/add-checkouts
+             {:client {:source-paths ["src" "../../src"], :compiler {:output-dir "resources/public/js", :output-to "resources/public/js/client.js", :asset-path "js", :optimizations :none, :source-map true, :source-map-timestamp true, :main "todomvc.core", :closure-defines {"re_frame.trace.trace_enabled_QMARK_" true}, :preloads ['day8.re-frame.trace.preload]}, :figwheel {:on-jsload "todomvc.core/main"}}
+              :dev    {:source-paths ["src" "../../src"], :compiler {:output-dir "resources/public/js1", :output-to "resources/public/js1/client.js"}}}
+             ["checkouts/abc/src"])
+           [:client :source-paths])
+         )))