# Documentation

Lean.Util.Path

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@[inline]

A .olean' search path.

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If the package of mod can be found in sp, return the path with extension ext (lean or olean) corresponding to mod. Otherwise, return none. Does not check whether the returned path exists.

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Like findWithExt, but ensures the returned path exists.

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@[export lean_get_prefix]
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@[export lean_get_libdir]
def Lean.getLibDir (leanSysroot : System.FilePath) :
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def Lean.initSearchPath (leanSysroot : System.FilePath) (sp : ) :

Initialize Lean's search path given Lean's system root and an initial search path. The system root can be obtained via getBuildDir (for internal use) or findSysroot (for external users).

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@[export lean_module_name_of_file]
def Lean.moduleNameOfFileName (fname : System.FilePath) (rootDir : ) :

Infer module name of source file name.

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def Lean.findSysroot (lean : optParam String "lean") :

Find the system root of the given lean command by calling lean --print-prefix and returning the path it prints. Defaults to trying the lean in PATH. If set, the LEAN_SYSROOT environment variable takes precedence. Note that the called lean binary might not be part of the system root, e.g. in the case of elan's proxy binary. Users internal to Lean should use Lean.getBuildDir` instead.

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