diff options
Diffstat (limited to 'lib/pure/ospaths.nim')
| -rw-r--r-- | lib/pure/ospaths.nim | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/lib/pure/ospaths.nim b/lib/pure/ospaths.nim index 65588529e..c4058ecce 100644 --- a/lib/pure/ospaths.nim +++ b/lib/pure/ospaths.nim @@ -556,12 +556,21 @@ when declared(getEnv) or defined(nimscript): yield substr(s, first, last-1) inc(last) - proc findExe*(exe: string): string {. + when not defined(windows) and declared(os): + proc checkSymlink(path: string): bool = + var rawInfo: Stat + if lstat(path, rawInfo) < 0'i32: + raiseOSError(osLastError()) + S_ISLNK(rawInfo.st_mode) + + proc findExe*(exe: string, followSymlinks: bool = true): string {. tags: [ReadDirEffect, ReadEnvEffect, ReadIOEffect].} = ## Searches for `exe` in the current working directory and then ## in directories listed in the ``PATH`` environment variable. ## Returns "" if the `exe` cannot be found. On DOS-like platforms, `exe` ## is added the `ExeExt <#ExeExt>`_ file extension if it has none. + ## If the system supports symlinks it also resolves them until it + ## meets the actual file. This behavior can be disabled if desired. result = addFileExt(exe, ExeExt) if existsFile(result): return var path = string(getEnv("PATH")) @@ -572,7 +581,22 @@ when declared(getEnv) or defined(nimscript): result else: var x = expandTilde(candidate) / result - if existsFile(x): return x + if existsFile(x): + when not defined(windows) and declared(os): + while followSymlinks: # doubles as if here + if x.isAbsolute and x.checkSymlink: + var r = newString(256) + var len = readlink(x, r, 256) + if len < 0: + raiseOSError(osLastError()) + if len > 256: + r = newString(len+1) + len = readlink(x, r, len) + setLen(r, len) + x = r + else: + break + return x result = "" when defined(nimscript) or (defined(nimdoc) and not declared(os)): |