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[rp2040] Fix lwipopts template load on Windows extended-length paths (#16783)

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This commit is contained in:
Jonathan Swoboda
2026-06-03 17:46:08 -04:00
committed by Jesse Hills
parent 375ecdfb2c
commit 5662e1b7cd
1 changed files with 9 additions and 6 deletions
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15
esphome/components/rp2040/__init__.py
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@@ -402,18 +402,21 @@ def _generate_lwipopts_h() -> None:
in the build directory, and a pre-build script injects this directory
into the compiler include path before the framework's own include dir.
"""
from jinja2 import Environment, FileSystemLoader
from jinja2 import Environment
lwip_defines = CORE.data[KEY_RP2040].get(KEY_LWIP_OPTS)
if not lwip_defines:
return
template_dir = Path(__file__).parent
jinja_env = Environment(
loader=FileSystemLoader(str(template_dir)),
keep_trailing_newline=True,
# Read the template via pathlib and render from a string rather than using
# FileSystemLoader. jinja2's loader joins the search path with posixpath, which
# breaks on Windows extended-length paths (\\?\C:\...) where forward slashes are
# not accepted, causing a spurious TemplateNotFound (see issue #16732).
template_text = (Path(__file__).parent / "lwipopts.h.jinja").read_text(
encoding="utf-8"
)
template = jinja_env.get_template("lwipopts.h.jinja")
jinja_env = Environment(keep_trailing_newline=True)
template = jinja_env.from_string(template_text)
content = template.render(**lwip_defines)
lwip_dir = CORE.relative_build_path("lwip_override")