Add basic atom.project.getEnv API

spec/fixtures/sample.txt

@@ -1 +1 @@
-Some textSome textSome text.
+Some textSome textSome textSome text.

spec/project-spec.coffee

@@ -537,3 +537,56 @@ describe "Project", ->
 
       randomPath = path.join("some", "random", "path")
       expect(atom.project.contains(randomPath)).toBe false
+
+  describe ".getEnv", ->
+    afterEach ->
+      delete atom.project.env
+
+    it "returns a copy of the environment", ->
+      env = atom.project.getEnv()
+
+      env.PROJECT_GET_ENV_TESTING = "foo"
+      expect(process.env.PROJECT_GET_ENV_TESTING).not.toEqual "foo"
+      expect(atom.project.getEnv().PROJECT_GET_ENV_TESTING).not.toEqual "foo"
+
+    describe "on platforms other than OS X", ->
+      beforeEach ->
+        spyOn(process, "platform").andReturn("foo")
+
+      describe "when TERM is not set", ->
+        it "returns the PATH unchanged", ->
+          spyOn(process.env, "TERM").andReturn(undefined)
+
+          expect(atom.project.getEnv().PATH).toEqual process.env.PATH
+
+      describe "when TERM is set", ->
+        it "returns the PATH unchanged", ->
+          spyOn(process.env, "TERM").andReturn("foo")
+
+          expect(atom.project.getEnv().PATH).toEqual process.env.PATH
+
+    describe "on OS X", ->
+      beforeEach ->
+        spyOn(process, "platform").andReturn("darwin")
+
+      describe "when TERM is not set", ->
+        it "replaces the PATH with the one obtained from the shell", ->
+          env = _.clone(process.env)
+          delete env.TERM
+
+          spyOn(process, "env").andReturn(env)
+
+          spyOn(atom.project, "getShellEnv").andReturn """
+            FOO=BAR
+            TERM=xterm-something
+            PATH=/usr/bin:/bin:/usr/sbin:/sbin:/some/crazy/path/entry/that/should/not/exist
+            """
+
+          expect(atom.project.getShellPath()).toEqual "/usr/bin:/bin:/usr/sbin:/sbin:/some/crazy/path/entry/that/should/not/exist"
+          expect(atom.project.getEnv().PATH).toEqual "/usr/bin:/bin:/usr/sbin:/sbin:/some/crazy/path/entry/that/should/not/exist"
+
+      describe "when TERM is set", ->
+        it "returns the PATH unchanged", ->
+          spyOn(process.env, "TERM").andReturn("foo")
+
+          expect(atom.project.getEnv().PATH).toEqual process.env.PATH

src/project.coffee

@@ -12,6 +12,9 @@ TextEditor = require './text-editor'
 Task = require './task'
 GitRepositoryProvider = require './git-repository-provider'
 
+child_process = require 'child_process'
+os = require 'os'
+
 # Extended: Represents a project that's opened in Atom.
 #
 # An instance of this class is always available as the `atom.project` global.
@@ -271,6 +274,42 @@ class Project extends Model
   contains: (pathToCheck) ->
     @rootDirectories.some (dir) -> dir.contains(pathToCheck)
 
+  ###
+  Section: Environment
+  ###
+
+  getEnv: ->
+    unless @env?
+      @env = _.clone(process.env)
+      if process.platform is "darwin" and not process.env.TERM?
+        @env.PATH = @getShellPath()
+
+    _.clone(@env)
+
+  getShellPath: ->
+    shellEnvText = @getShellEnv()
+    env = {}
+
+    for line in shellEnvText.split(os.EOL)
+      if line.includes("=")
+        components = line.split("=")
+        if components.length is 2
+          env[components[0]] = components[1]
+        else
+          k = components.shift()
+          v = components.join("=")
+          env[k] = v
+
+    env.PATH
+
+  getShellEnv: ->
+    shell = process.env.SHELL ? "/bin/bash"
+    results = child_process.spawnSync shell, ["--login"], input: "env", encoding: "utf8"
+    return if results.error?
+    return unless results.stdout and results.stdout.length > 0
+
+    results.stdout
+
   ###
   Section: Private
   ###