From 28000431492f835912a785bd8a93f86ae590a041 Mon Sep 17 00:00:00 2001
From: Jeremiah Snapp <jeremiah@chef.io>
Date: Fri, 5 Jun 2020 13:14:03 -0400
Subject: [PATCH] Add pwd function to HCL

Signed-off-by: Jeremiah Snapp <jeremiah@chef.io>
---
 hcl2template/function/pwd.go                  | 20 ++++++++++++++++++
 hcl2template/functions.go                     |  1 +
 website/data/docs-navigation.js               |  1 +
 .../docs/from-1.5/functions/file/pwd.mdx      | 21 +++++++++++++++++++
 4 files changed, 43 insertions(+)
 create mode 100644 hcl2template/function/pwd.go
 create mode 100644 website/pages/docs/from-1.5/functions/file/pwd.mdx

diff --git a/hcl2template/function/pwd.go b/hcl2template/function/pwd.go
new file mode 100644
index 000000000..64948d838
--- /dev/null
+++ b/hcl2template/function/pwd.go
@@ -0,0 +1,20 @@
+package function
+
+import (
+	"os"
+
+	"github.com/zclconf/go-cty/cty"
+	"github.com/zclconf/go-cty/cty/function"
+)
+
+// MakePwdFunc constructs a function that returns the working directory as a string.
+func MakePwdFunc() function.Function {
+	return function.New(&function.Spec{
+		Params: []function.Parameter{},
+		Type:   function.StaticReturnType(cty.String),
+		Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
+			dir, err := os.Getwd()
+			return cty.StringVal(dir), err
+		},
+	})
+}
diff --git a/hcl2template/functions.go b/hcl2template/functions.go
index 821c525ba..4ae0fa862 100644
--- a/hcl2template/functions.go
+++ b/hcl2template/functions.go
@@ -76,6 +76,7 @@ func Functions(basedir string) map[string]function.Function {
 		"parseint":        stdlib.ParseIntFunc,
 		"pathexpand":      filesystem.PathExpandFunc,
 		"pow":             stdlib.PowFunc,
+		"pwd":             pkrfunction.MakePwdFunc(),
 		"range":           stdlib.RangeFunc,
 		"reverse":         stdlib.ReverseFunc,
 		"replace":         stdlib.ReplaceFunc,
diff --git a/website/data/docs-navigation.js b/website/data/docs-navigation.js
index 3b29ceaa9..4840b93fd 100644
--- a/website/data/docs-navigation.js
+++ b/website/data/docs-navigation.js
@@ -112,6 +112,7 @@ export default [
               'fileexists',
               'fileset',
               'pathexpand',
+              'pwd',
             ],
           },
           {
diff --git a/website/pages/docs/from-1.5/functions/file/pwd.mdx b/website/pages/docs/from-1.5/functions/file/pwd.mdx
new file mode 100644
index 000000000..ef2bafe28
--- /dev/null
+++ b/website/pages/docs/from-1.5/functions/file/pwd.mdx
@@ -0,0 +1,21 @@
+---
+layout: docs
+page_title: pwd - Functions - Configuration Language
+sidebar_title: pwd
+description: The pwd function returns the working directory while executing Packer.
+---
+
+# `pwd` Function
+
+`pwd` returns the working directory while executing Packer.
+
+```hcl
+pwd()
+```
+
+## Examples
+
+```shell-session
+> pwd()
+/home/user/some/packer
+```