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根据设置引擎开发环境的描述#xff0c;确保有以下可用依赖项#xff1a;
Linux、macOS 或 Windows。 Linux 支持 Android 和 Fuchsia 的交叉编译工件#xff0c;但不支持 iOS。macOS 支持 Android 和 iOS 的交叉编译工件。Windows 不支持任何 Android、Fuchsia 或 i…前言
根据设置引擎开发环境的描述确保有以下可用依赖项
Linux、macOS 或 Windows。 Linux 支持 Android 和 Fuchsia 的交叉编译工件但不支持 iOS。macOS 支持 Android 和 iOS 的交叉编译工件。Windows 不支持任何 Android、Fuchsia 或 iOS 的交叉编译工件。 git用于源代码版本控制。一个IDE。另请参阅本页底部的部分了解有关在编辑引擎时设置语法突出显示的建议。一个 ssh 客户端用于通过 GitHub 进行身份验证。Chromium 的 depot_tools 确保它在你的路径中。我们使用gclien tdepot_tools 中的工具。Python被我们许多工具使用包括gclient。在 macOS 和 Linux 上curl 和 unzip被gclient sync使用。在 Windows 上 Visual Studio 2017 或更高版本仅非 Google 员工需要。Windows 10 SDK仅非 Google 员工需要。 请务必安装“Windows 调试工具”功能。 在 macOS 上最新的 Xcode。推荐给 Google 员工用于分布式构建的 Goma。该编译页有关于如何设置此详细信息。
不需要安装Dart因为 Dart 工具链会作为“获取代码”步骤的一部分自动下载。类似的对于 Android SDK它是通过以下gclient sync步骤下载的。
1 flutter engine
1.1 win10
根据flutter官方的wiki设置引擎开发环境做好前置工作主要是depot_tools的安装
depot_tools是Google专门为开发大项目开发的.git代码仓库管理的python脚本统一管理整个源码仓库的所有依赖depot_tools使用说明
但是给的链接不能访问找到以下命令git下载depot_tools但是这个仍然需要科学上网这里可以直接看第1.2章
git clone https://chromium.googlesource.com/chromium/tools/depot_tools用git下载好后得到depot_tools文件夹可以将depot_tools路径加到环境变量PATH
Fork https://github.com/flutter/engine到你自己的GitHub帐户
然后创建engine文件夹在engine文件夹内创建.gclient文件并且替换your_name_here为你的GitHub帐户名
solutions [{managed: False,name: src/flutter,url: gitgithub.com:your_name_here/engine.git,custom_deps: {},deps_file: DEPS,safesync_url: ,custom_vars : {download_android_deps : False,download_windows_deps : False,},},
]然后在engine目录执行
../depot_tools/gclient sync报错如下这是在win10系统下这是不能访问服务器导致
Downloading CIPD client for windows-amd64 from https://chrome-infra-packages.appspot.com/client?platformwindows-amd64versiongit_revision:9464003f070813371070f9b8f7c350d87619d145...
Failed to download the file, check your network connection, 使用“2”个参数调用“DownloadFile”时发生异常:“无法连接到远程服务器”
Retrying after a short nap...
Failed to download the file, check your network connection, 使用“2”个参数调用“DownloadFile”时发生异常:“无法连接到远程服务器”
Retrying after a short nap...
Failed to download the file, check your network connection, 使用“2”个参数调用“DownloadFile”时发生异常:“无法连接到远程服务器”
所在位置 D:\depot_tools\.cipd_impl.ps1:112 字符: 5throw Failed to download the file, check your network connection ...~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ CategoryInfo : OperationStopped: (Failed to downl...异常:“无法连接到远程服务器”:String) [], RuntimeException FullyQualifiedErrorId : Failed to download the file, check your network connection, 使用“2”个参数调用“DownloadFile”时发生异常:“无法连接到远程服务器”Failed to bootstrap or update CIPD client 直接从CSDN下载别人整理好的包depot_tools_20210326_updated.7z
修改depot_tools/update_depot_tools.bat这个文件取消自动更新添加如下变量
:: MODIFY: Disable automatic update!
set DEPOT_TOOLS_UPDATE0注意gclient是用python来运行的如果是使用csdn上的包一定要先安装python不然会一直卡住 然后再次报错这是在win10系统下这也是不能访问服务器导致
[E2021-08-13T19:04:59.08526208:00 22076 0 annotate.go:266]
original error: prpc: when sending request: Post https://chrome-infra-packages.appspot.com/prpc/cipd.Repository/ResolveVersion: dial tcp 108.160.167.167:443:
connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.这里我放弃了回家科学上网直接在ubuntu 20.04.2.0中安装
1.2 ubuntu
科学上网加ubuntu 20.04.2.0版本直接执行以下命令下载depot_tools当然git这些要先配置好
git clone https://chromium.googlesource.com/chromium/tools/depot_tools下载完成之后把depot_tools目录添加到环境变量中这样可以随时使用gclient命令
在depot_tools同级目录创建engine目录在engine文件夹内创建.gclient文件文件内容如下
solutions [{managed: False,name: src/flutter,url: gitgithub.com:flutter/engine.git,custom_deps: {},deps_file: DEPS,safesync_url: ,custom_vars : {download_android_deps : False,download_windows_deps : False,},},
]还可以指定engine的版本把url换成下面的FLUTTER_ENGINE也就是commit id
如Flutter Stable 2.5.1 Engine的id就是b3af521a050e6ef076778bcaf16e27b2521df8f8
url: https://github.com/flutter/engine.gitFLUTTER_ENGINE,然后在engine目录执行
gclient sync之后是漫长的下载过程下载完成后depot_tools和engine压缩成tar.gz大约是6.9G下载过程中遇到一些小err百度一下就能解决
另外代码下载完成后需要切换版本进入engine/src/flutter然后执行
git reset --hard b3af521a050e6ef076778bcaf16e27b2521df8f8
#或者直接切换分支例如
git checkout flutter-2.5-candidate.5然后返回engine目录执行
gclient sync --with_branch_heads --with_tags此时目录结构大约是这样的
.
├── depot_tools
│ ├── bootstrap
│ ├── bootstrap-23.8.10.chromium.20_bin
│ ├── gclient
│ ├── git-cache
│ ├── gn
│ ├── ninja
│ ├── third_party
│ ├── update_depot_tools
│ ├── ...
├── engine├── _bad_scm└── src下载之后以后如果没有网络可以设置环境变量DEPOT_TOOLS_UPDATE取消depot_tools的更新
export DEPOT_TOOLS_UPDATE0之后cd engine/src/flutter设置engine更新源
git remote add upstream gitgithub.com:flutter/engine.git需要更新的时候在engine/src/flutter执行
git pull upstream master
gclient sync最后编译下看看能否正常编译
xxxxExdroid88:~/flutter-workspace/engine/src$ ./flutter/tools/gn --unoptimized
GOMA usage was specified but cant be found, falling back to local builds. Set the GOMA_DIR environment variable to fix GOMA.
Generating GN files in: out/host_debug_unopt
Generating compile_commands took 102ms
Done. Made 870 targets from 253 files in 831msxxxxExdroid88:~/flutter-workspace/engine/src$ ../../depot_tools/ninja -C out/host_debug_unopt
ninja: Entering directory out/host_debug_unopt
[6026/6026] STAMP obj/default.stampxxxxExdroid88:~//flutter-workspace/engine/src/out/host_debug_unopt$ find ./ -name \*.so
./lib.unstripped/libflutter_linux_gtk.so
./lib.unstripped/libGLESv2.so
./lib.unstripped/libflutter_linux_glfw.so
./lib.unstripped/libEGL.so
./lib.unstripped/libflutter_engine.so
./libflutter_linux_gtk.so
./libGLESv2.so
./libflutter_linux_glfw.so
./libEGL.so
./libflutter_engine.so 2 flutter
根据flutter linux install的描述安装即可我是直接下载flutter_linux_2.2.3-stable.tar.xz解压后目录如下可以把flutter/bin路径添加到环境变量中
.
├── depot_tools
│ ├── bootstrap
│ ├── bootstrap-23.8.10.chromium.20_bin
│ ├── gclient
│ ├── git-cache
│ ├── gn
│ ├── ninja
│ ├── third_party
│ ├── update_depot_tools
│ ├── ...
├── engine├── _bad_scm└── src
├── flutter
│ ├── analysis_options.yaml
│ ├── AUTHORS
│ ├── bin
│ ├── CODE_OF_CONDUCT.md
│ ├── CODEOWNERS
│ ├── CONTRIBUTING.md
│ ├── dartdoc_options.yaml
│ ├── dev
│ ├── examples
│ ├── flutter_console.bat
│ ├── flutter_root.iml
│ ├── LICENSE
│ ├── packages
│ ├── PATENT_GRANT
│ ├── README.md
│ ├── SECURITY.md
│ └── versio然后执行下面命令注意flutter doctor执行时也需要访问github要注意网络联通
xxxxExdroid88:~/flutter-workspace/flutter/bin$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 2.2.3, on Linux, locale zh_CN.UTF-8)
[✗] Android toolchain - develop for Android devices✗ Unable to locate Android SDK.Install Android Studio from: https://developer.android.com/studio/index.htmlOn first launch it will assist you in installing the Android SDK components.(or visit https://flutter.dev/docs/get-started/install/linux#android-setup for detailed instructions).If the Android SDK has been installed to a custom location, please useflutter config --android-sdk to update to that location.[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[☠] Linux toolchain - develop for Linux desktop (the doctor check crashed)✗ Due to an error, the doctor check did not complete. If the error message below is not helpful, please let us know about this issue at https://github.com/flutter/flutter/issues.✗ ProcessException: Failed to find clang in the search path.Command: clang
[!] Android Studio (not installed)
[✓] Connected device (1 available)! Doctor found issues in 4 categories.xxxxExdroid88:~/flutter-workspace/flutter/bin$ flutter precache
xxxxExdroid88:~/flutter-workspace/flutter/bin$ flutter config --enable-linux-desktop
Setting enable-linux-desktop value to true.You may need to restart any open editors for them to read new settings.3 flutter-embedded-linux
flutter-embedded-linux需要使用Wayland作为显示后端的时候才需要安装
git clone gitgithub.com:sony/flutter-embedded-linux.git该库编译依要求cmake3.10可以下载安装cmake最新版 也可以通过该命令安装好依赖
sudo apt install clang cmake build-essential pkg-config libegl1-mesa-dev libxkbcommon-dev libgles2-mesa-dev
sudo apt install libwayland-dev wayland-protocolsxxxxExdroid88:~/flutter-workspace$ cd flutter-embedded-linux/
xxxxExdroid88:~/flutter-workspace/flutter-embedded-linux$ mkdir build/
xxxxExdroid88:~/flutter-workspace/flutter-embedded-linux/build$ cd build/
xxxxExdroid88:~/flutter-workspace/flutter-embedded-linux/build$ cp ../../engine/src/out/host_debug_unopt/libflutter_engine.so ./
xxxxExdroid88:~/flutter-workspace/flutter-embedded-linux/build$ cmake -DUSER_PROJECT_PATHexamples/flutter-wayland-client -DCMAKE_BUILD_TYPERelease ..
-- The CXX compiler identification is Clang 10.0.0
-- The C compiler identification is Clang 10.0.0
-- Check for working CXX compiler: /usr/bin/clang
-- Check for working CXX compiler: /usr/bin/clang -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working C compiler: /usr/bin/clang
-- Check for working C compiler: /usr/bin/clang -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
User project: examples/flutter-wayland-client
-- Found PkgConfig: /usr/bin/pkg-config (found version 0.29.1)
-- Checking for module egl
-- Found egl, version 1.5
-- Checking for module xkbcommon
-- Found xkbcommon, version 0.10.0
-- Checking for module wayland-protocols
-- Found wayland-protocols, version 1.20
-- Checking for module wayland-client1.16.0
-- Found wayland-client, version 1.18.0
-- Checking for module wayland-cursor1.16.0
-- Found wayland-cursor, version 1.18.0
-- Checking for module wayland-egl1.16.0
-- Found wayland-egl, version 18.1.0
-- Checking for module glesv2
-- Found glesv2, version 3.2
-- Configuring done
-- Generating done
-- Build files have been written to: /mnt/d/flutter-workspace/flutter-embedded-linux/buildxxxxExdroid88:~/flutter-workspace/flutter-embedded-linux/build$ cmake --build .
[ 1%] Generating ../src/third_party/wayland/protocols/presentation-time-protocol.h
[ 3%] Generating ../src/third_party/wayland/protocols/xdg-shell-client-protocol.h
[ 5%] Generating ../src/third_party/wayland/protocols/xdg-shell-protocol.c
[ 6%] Generating ../src/third_party/wayland/protocols/text-input-unstable-v1-client-protocol.h
[ 8%] Generating ../src/third_party/wayland/protocols/text-input-unstable-v1-protocol.c
[ 10%] Generating ../src/third_party/wayland/protocols/text-input-unstable-v3-client-protocol.h
[ 11%] Generating ../src/third_party/wayland/protocols/text-input-unstable-v3-protocol.c
[ 13%] Generating ../src/third_party/wayland/protocols/presentation-time-protocol.c
Scanning dependencies of target flutter-client
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[ 99%] Linking CXX executable flutter-client
[100%] Built target flutter-client如果报错下面的错那么就是没有把上一步编译生成的libflutter_engine.so拷贝到该编译目录下
make[2]: *** No rule to make target libflutter_engine.so, needed by flutter-client. Stop.
make[1]: *** [CMakeFiles/Makefile2:76: CMakeFiles/flutter-client.dir/all] Error 2
make: *** [Makefile:130: all] Error 2这一步编译产物有flutter-client
