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add os.absolutePath; fixes #8174 #8213

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merged 4 commits into from
Jul 10, 2018
Merged

add os.absolutePath; fixes #8174 #8213

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f8d75b0
add os.absolutePath
timotheecour Jul 1, 2018
e56163c
fixup
timotheecour Jul 6, 2018
a09a881
fixup
timotheecour Jul 7, 2018
97c5dd4
Fixes absolutePath error message.
dom96 Jul 10, 2018
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20 changes: 20 additions & 0 deletions lib/pure/os.nim
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Original file line number Diff line number Diff line change
Expand Up @@ -296,6 +296,26 @@ proc setCurrentDir*(newDir: string) {.inline, tags: [].} =
else:
if chdir(newDir) != 0'i32: raiseOSError(osLastError())

proc absolutePath*(path: string, root = getCurrentDir()): string =
## Returns the absolute path of `path`, rooted at `root` (which must be absolute)
## if `path` is absolute, return it, ignoring `root`
runnableExamples:
doAssert absolutePath("a") == getCurrentDir() / "a"
if isAbsolute(path): path
else:
if not root.isAbsolute:
raise newException(ValueError, "The specified root is not absolute: " & root)
joinPath(root, path)

when isMainModule:
doAssertRaises(ValueError): discard absolutePath("a", "b")
doAssert absolutePath("a") == getCurrentDir() / "a"
doAssert absolutePath("a", "/b") == "/b" / "a"
when defined(Posix):
doAssert absolutePath("a", "/b/") == "/b" / "a"
doAssert absolutePath("a", "/b/c") == "/b/c" / "a"
doAssert absolutePath("/a", "b/") == "/a"

proc expandFilename*(filename: string): string {.rtl, extern: "nos$1",
tags: [ReadDirEffect].} =
## Returns the full (`absolute`:idx:) path of an existing file `filename`,
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