Created
March 1, 2018 16:18
-
-
Save avnik/ef7dd2f420733834abd026d3dd70db7f to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
{ fetchgit, writeScript, openssh, stdenv, config}: | |
with stdenv.lib; | |
let | |
gitConf = config.fetchGitPrivate or {}; | |
hosts = mapAttrsToList (host: attrs: attrs // { host = host; identityFileInternal = "identity_host_${host}"; }) (gitConf.hosts or {}); | |
identities = imap (i: attrs: attrs // { identityFileInternal = "identity_${toString i}"; } ) (gitConf.identities or []); | |
in | |
args: derivation ((fetchgit args).drvAttrs // { | |
GIT_SSH = writeScript "fetchgit-ssh" '' | |
#! ${stdenv.shell} -e | |
tmpTemplate="''${TMPDIR:-/tmp}/git-checkout-tmp-XXXXXXXX" | |
tmpPath="$(mktemp -d $tmpTemplate)" | |
# shellcheck disable=SC2064 | |
trap "rm -rf \"$tmpPath\"" EXIT | |
sshConfig=$tmpPath/ssh_config | |
chmod 0700 $tmpPath | |
# Copy identity files and fix permissions | |
${concatMapStrings (item: '' | |
cp ${item.identityFile} $tmpPath/${item.identityFileInternal} | |
chmod 0600 $tmpPath/${item.identityFileInternal} | |
'') (filter (h: h ? identityFile) hosts ++ identities) } | |
cat >$sshConfig <<EOF | |
StrictHostKeyChecking no | |
UserKnownHostsFile /dev/null | |
# Common identities from config.fetchGitPrivate.identities | |
${concatMapStrings (item: '' | |
IdentityFile $tmpPath/${item.identityFileInternal} | |
'') identities} | |
# Per host definitions | |
${concatMapStrings (item: '' | |
Host ${item.host} | |
HostName ${item.hostName} | |
Port ${toString item.port} | |
${optionalString (item ? identityFile) "IdentityFile $tmpPath/${item.identityFileInternal}"} | |
'') hosts} | |
EOF | |
# not exec, because we perform some cleanup in trap | |
${openssh}/bin/ssh -F $sshConfig "$@" | |
''; | |
}) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment