From d9721ed85f4edbdf678a6670123ae0329cd7bb1a Mon Sep 17 00:00:00 2001
From: Christopher Kaster <me@atomicptr.de>
Date: Wed, 24 Jul 2024 14:48:10 +0200
Subject: [PATCH] add some meta vars to the template engine

---
 README.md      |  9 +++++++++
 pkg/cli/cli.go | 29 ++++++++++++++++++++++++-----
 2 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index a5080a7..737b9d3 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,15 @@ The \[...\] part is variable and will as you can see above also be exported to t
 
 You could also create a template like this "\[controllerName\]Controller.php" which would also match for "IndexController" to make even more precise templates
 
+## Meta template variables
+
+tmplr also has some extra template variables that you don't have to specify like:
+
+- \_cwd - The current working directory
+- \_path - The absolute path of your new file, e.g. pkg/cli/test.go will use "/home/YOURNAME/dev/tmplr/pkg/cli/test.go" here
+- \_dirname - The name of the directory the new file is in, e.g. pkg/cli/test.go will use "cli" here
+- \_filename - The name of the file, e.g. pkg/cli/test.go will use "test.go" here
+
 ## Name
 
 tmplr comes from a mixture of template and Templar and is also supposed to be pronounced "Templar".
diff --git a/pkg/cli/cli.go b/pkg/cli/cli.go
index a01061b..e0b83dd 100644
--- a/pkg/cli/cli.go
+++ b/pkg/cli/cli.go
@@ -3,6 +3,7 @@ package cli
 import (
 	"fmt"
 	"os"
+	"path/filepath"
 
 	"github.com/atomicptr/tmplr/pkg/fs"
 	"github.com/atomicptr/tmplr/pkg/meta"
@@ -47,11 +48,21 @@ func Run() error {
 		return err
 	}
 
+	cwd, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+
 	for _, arg := range flag.Args() {
-		matchingTemplates := tmpl.FindMatchingTemplates(arg, templateFiles)
+		p, err := filepath.Abs(arg)
+		if err != nil {
+			return err
+		}
+
+		matchingTemplates := tmpl.FindMatchingTemplates(p, templateFiles)
 
 		if len(matchingTemplates) == 0 {
-			f, err := fs.OpenFile(arg)
+			f, err := fs.OpenFile(p)
 			if err != nil {
 				return err
 			}
@@ -67,7 +78,7 @@ func Run() error {
 		var templates []*tmpl.Template
 
 		for _, templateFile := range matchingTemplates {
-			template, err := tmpl.LoadTemplate(arg, templateFile)
+			template, err := tmpl.LoadTemplate(p, templateFile)
 			if err != nil {
 				return err
 			}
@@ -109,14 +120,22 @@ func Run() error {
 			selected.Data[userVar.Name] = val
 		}
 
+		// add some vars that are always present
+		selected.Data["_cwd"] = cwd
+		selected.Data["_path"] = p
+		selected.Data["_dirname"] = filepath.Base(filepath.Dir(p))
+		selected.Data["_filename"] = filepath.Base(p)
+
+		fmt.Println(selected.Data)
+
 		data, err := selected.Render()
 		if err != nil {
 			return err
 		}
 
-		f, err := fs.OpenFile(arg)
+		f, err := fs.OpenFile(p)
 		if err != nil {
-			return fmt.Errorf("could not create file %s: %w", arg, err)
+			return fmt.Errorf("could not create file %s: %w", p, err)
 		}
 		defer (func() {
 			err := f.Close()