plugin.compile_commands.autoupdate不会携带预编译header信息 about xmake HOT 6 CLOSED

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Title: plugin.compile_commands.autoupdate does not carry precompiled header information

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At present, it is found that the vscode plug-in behaves normally when it directly calls compile_commands.lua, but the independent startup process behaves abnormally.

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经过逆向，看起来是 XMAKE_GENERATOR_COMPDB_LSP 这个环境变量的问题，模仿vscode插件内写法：
os.setenv("XMAKE_GENERATOR_COMPDB_LSP", "clangd")
config.load()
_config_targets()
compile_commands.make(compileCommandsDirectory or ".vscode")
就会正确输出pch结果

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Bot detected the issue body's language is not English, translate it automatically.

After reverse engineering, it seems that the problem is the XMAKE_GENERATOR_COMPDB_LSP environment variable, which imitates the writing method in the vscode plug-in:
os.setenv("XMAKE_GENERATOR_COMPDB_LSP", "clangd")
config.load()
_config_targets()
compile_commands.make(compileCommandsDirectory or ".vscode")
The pch result will be output correctly.

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配置下 lsp 到 clangd 就行了，因为目前已知的，就 clangd 支持 pch，其他的暂时没测试验证过，所以暂时禁用了 pch

add_rules("plugin.compile_commands.autoupdate", { lsp = "clangd", outputdir = ".vscode" })

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Just configure lsp to clangd, because as far as is known, only clangd supports pch, and the others have not been tested and verified, so pch is temporarily disabled.

add_rules("plugin.compile_commands.autoupdate", { lsp = "clangd", outputdir = ".vscode" })

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