我正在尝试构建一个包含 python 服务 (radicale) 的 Yocto 图像，这需要来自 Python3 的 wsgiref。Wsgiref 是 Python3 的一部分，然而，在 poky 中，没有提供 python3-wsgiref 的默认配方。为了构建它，必须对 poky/meta/recipes-devtools/python/python3/python3-manifest.json 进行以下更改：
-- a/python3-manifest.json
+++ b/python3-manifest.json
@@ -812,6 +812,7 @@
"unittest",
"unixadmin",
"venv",
+ "wsgiref",
"xml",
"xmlrpc"
],
@@ -1196,6 +1197,37 @@
],
"cached": []
},
+ "wsgiref": {
+ "summary": "Web Server Gateway Interface Reference Implementation",
+ "rdepends": [
+ "core",
+ "crypt",
+ "datetime",
+ "email",
+ "html",
+ "io",
+ "math",
+ "mime",
+ "netclient",
+ "netserver",
+ "stringold"
+ ],
+ "files": [
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/handlers.py",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/headers.py",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/simple_server.py",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/util.py",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/validate.py"
+ ],
+ "cached": [
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/__pycache__",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/__pycache__/handlers.*.pyc",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/__pycache__/headers.*.pyc",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/__pycache__/simple_server.*.pyc",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/__pycache__/util.*.pyc",
+ "${libdir}/python${PYTHON_MAJMIN}/wsgiref/__pycache__/validate.*.pyc"
+ ]
+ },
"xml": {
"summary": "Python basic XML support",
"rdepends": [
通过此更改，它将作为 python3 配方的一部分提供。
这是激进的秘诀：
SUMMARY = "CalDAV and CardDAV Server"
HOMEPAGE = "https://radicale.org/"
AUTHOR = "Guillaume Ayoub <guillaume.ayoub@kozea.fr>"
LICENSE = "GPLv3"
LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
SRC_URI = "https://files.pythonhosted.org/packages/20/d2/0761fe39ac049b1e39790b051302008eafdc7b399a39268aa2204a0b9613/Radicale-3.0.6.tar.gz"
SRC_URI[md5sum] = "fa0879b70bdcd26477759eee347ea91f"
SRC_URI[sha256sum] = "a9433d3df97135d9c02cec8dde4199444daf1b73ad161ded398d67b8e629fdc6"
S = "${WORKDIR}/Radicale-3.0.6"
RDEPENDS_${PN} = "python3-defusedxml python3-passlib python3-vobject python3-python-dateutil python3-setuptools python3-fcntl python3-wsgiref"
inherit setuptools3
正如你所看到的，python3-wsgiref 被附加到 RDEPENDS_${PN} 并且当我构建整个图像时，一切都构建良好并且服务能够在系统上启动。
但是，我想将对 python3-manifest.json 的更改放入补丁中，并将补丁应用到 bbappend 文件中。为此，我在我的自定义“meta-radicale”层“meta-radicale/recipes-devtools/python/python3_3.8.11.bbappend”中添加了一个 bbappend：
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
SRC_URI_append = " file://build-wsgiref.patch;patchdir=${WORKDIR} "
上面显示的补丁被放入'meta-radicale/recipes-devtools/python/python3/build-wsgiref.patch'。
这是 meta-radiale 的整个文件树：
meta-radicale/
meta-radicale/recipes-radicale
meta-radicale/recipes-radicale/python
meta-radicale/recipes-radicale/python/python3-versions.inc
meta-radicale/recipes-radicale/python/python3-passlib_1.7.4.bb
meta-radicale/recipes-radicale/python/python3-six_1.16.0.bb
meta-radicale/recipes-radicale/python/python3-vobject_0.9.6.1.bb
meta-radicale/recipes-radicale/python/python3-python-dateutil_2.8.2.bb
meta-radicale/recipes-radicale/python/python3-radicale_3.0.6.bb
meta-radicale/recipes-radicale/python/python3-defusedxml_0.7.1.bb
meta-radicale/recipes-devtools
meta-radicale/recipes-devtools/python
meta-radicale/recipes-devtools/python/python3
meta-radicale/recipes-devtools/python/python3/build-wsgiref.patch
meta-radicale/recipes-devtools/python/python3_3.8.11.bbappend
meta-radicale/conf
meta-radicale/conf/layer.conf
'meta-radicale/recipes-radicale/python/' 下的食谱是由'pipoe -p Radicale --python python3' 创建的，并且工作正常，我测试了它们。
如果我尝试构建图像，我会得到以下输出：
RROR: smokylinux-image-1.0-r0 do_rootfs: Could not invoke dnf. Command '/home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/recipe-sysroot-native/usr/bin/dnf -v --rpmverbosity=info -y -c /home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/rootfs/etc/dnf/dnf.conf --setopt=reposdir=/home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/rootfs/etc/yum.repos.d --installroot=/home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/rootfs --setopt=logdir=/home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/temp --repofrompath=oe-repo,/home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/oe-rootfs-repo --nogpgcheck install gerbera imanoid openssh openssh-sftp-server packagegroup-core-boot python3-radicale run-postinsts sudo vim' returned 1:
DNF version: 4.2.2
cachedir: /home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/rootfs/var/cache/dnf
Added oe-repo repo from /home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/oe-rootfs-repo
repo: using cache for: oe-repo
not found other for:
not found modules for:
not found deltainfo for:
not found updateinfo for:
oe-repo: using metadata from Mon 23 Aug 2021 01:56:26 PM UTC.
No module defaults found
--> Starting dependency resolution
--> Finished dependency resolution
Error:
Problem: conflicting requests
- nothing provides python3-wsgiref needed by python3-radicale-3.0.6-r0.aarch64
(try to add '--skip-broken' to skip uninstallable packages or '--nobest' to use not only best candidate packages)
ERROR: Logfile of failure stored in: /home/imanoid/workspace/smoky-pi/build/smoky-qemuarm64/tmp/work/qemuarm64-poky-linux/smokylinux-image/1.0-r0/temp/log.do_rootfs.4376
ERROR: Task (/home/imanoid/workspace/smoky-pi/yocto/meta-smokylinux/recipes-smokylinux/images/smokylinux-image.bb:do_rootfs) failed with exit code '1'
我不明白为什么行为不同，直接修改 python3-manifest.json 与通过补丁修改它时。