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## OS utilities like 'withDir'.
## (c) 2021 Andreas Rumpf
import os, strutils, osproc
proc isUrl*(x: string): bool =
x.startsWith("git://") or x.startsWith("https://") or x.startsWith("http://")
proc cloneUrl*(url, dest: string; cloneUsingHttps: bool): string =
## Returns an error message on error or else "".
result = ""
var modUrl =
if url.startsWith("git://") and cloneUsingHttps:
"https://" & url[6 .. ^1]
else: url
# github + https + trailing url slash causes a
# checkout/ls-remote to fail with Repository not found
var isGithub = false
if modUrl.contains("github.com") and modUrl.endsWith("/"):
modUrl = modUrl[0 .. ^2]
isGithub = true
let (_, exitCode) = execCmdEx("git ls-remote --quiet --tags " & modUrl)
var xcode = exitCode
if isGithub and exitCode != QuitSuccess:
# retry multiple times to avoid annoying github timeouts:
for i in 0..4:
os.sleep(4000)
xcode = execCmdEx("git ls-remote --quiet --tags " & modUrl)[1]
if xcode == QuitSuccess: break
if xcode == QuitSuccess:
# retry multiple times to avoid annoying github timeouts:
let cmd = "git clone " & modUrl & " " & dest
for i in 0..4:
if execShellCmd(cmd) == 0: return ""
os.sleep(4000)
result = "exernal program failed: " & cmd
elif not isGithub:
let (_, exitCode) = execCmdEx("hg identify " & modUrl)
if exitCode == QuitSuccess:
let cmd = "hg clone " & modUrl & " " & dest
for i in 0..4:
if execShellCmd(cmd) == 0: return ""
os.sleep(4000)
result = "exernal program failed: " & cmd
else:
result = "Unable to identify url: " & modUrl
else:
result = "Unable to identify url: " & modUrl
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