Support older Jinja2 installs required by some applications

README.md

@@ -680,6 +680,10 @@ You can administratively default the execution policy to unrestricted for window
 * To use `hab activate` in bash or Powershell you need to use `.` or `source`. Powershell
 has the `.` operator so I would use that for both Powershell and bash.
 `. hab activate default`.
+* Jinja2 and MarkupSafe minimum requirements should be respected. This allows hab
+to work with Houdini 19.5 that ships with very dated versions of these packages.
+In practice this just means that we have to cast pathlib objects to strings before
+passing them to Jinja2.
 
 # Glosary
 

hab/parsers/hab_base.py

@@ -564,7 +564,9 @@ def generate_config_script(
         """
 
         environment = Environment(
-            loader=FileSystemLoader(TEMPLATES), trim_blocks=True, lstrip_blocks=True
+            loader=FileSystemLoader(str(TEMPLATES)),
+            trim_blocks=True,
+            lstrip_blocks=True,
         )
         template = environment.get_template(f"{template}{ext}")
         kwargs = dict(
@@ -624,7 +626,9 @@ def generate_alias_script(self, template, ext, alias, cfg):
             str: The rendered script.
         """
         environment = Environment(
-            loader=FileSystemLoader(TEMPLATES), trim_blocks=True, lstrip_blocks=True
+            loader=FileSystemLoader(str(TEMPLATES)),
+            trim_blocks=True,
+            lstrip_blocks=True,
         )
         template = environment.get_template(f"{template}{ext}")
         kwargs = dict(

requirements.txt

@@ -2,7 +2,8 @@ anytree
 click>=7.1.2
 colorama
 future>=0.18.2
-Jinja2
+Jinja2>=2.10.1
+MarkupSafe>=0.23
 packaging>=20.0
 Pygments
 setuptools>=44.1.1

setup.cfg

@@ -28,7 +28,8 @@ project_urls =
 [options]
 packages = find:
 install_requires =
-    Jinja2
+    Jinja2>=2.10.1
+    MarkupSafe>=0.23
     Pygments
     anytree
     click>=7.1.2

tests/test_scripts.py

@@ -103,7 +103,9 @@ def check_file(item):
         # Using Jinja for this because other python str formatting methods require
         # too much manipulation of the reference files.
         environment = Environment(
-            loader=FileSystemLoader(item.parent), trim_blocks=True, lstrip_blocks=True
+            loader=FileSystemLoader(str(item.parent)),
+            trim_blocks=True,
+            lstrip_blocks=True,
         )
         template = environment.get_template(item.name)
         # Note: jinja2' seems to be inconsistent with its trailing newlines depending