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|
{ source
, target-user ? "root"
, target-host
, target-path ? "/var/src"
}:
with import <nixpkgs/lib>;
with import ~/stockholm/krebs/4lib {
lib = import <nixpkgs/lib>;
};
with builtins;
let
out = {
inherit populate;
};
populate = ''
#! /bin/sh
set -eu
verbose() {
printf '+' >&2
printf ' %q' "$@" >&2
printf '\n'
"$@"
}
echo ${shell.escape git-script} \
| ssh ${shell.escape "${target-user}@${target-host}"} -T
unset tmpdir
trap '
rm "$tmpdir"/*
rmdir "$tmpdir"
trap - EXIT INT QUIT
' EXIT INT QUIT
tmpdir=$(mktemp -dt stockholm.XXXXXXXX)
chmod 0755 "$tmpdir"
${concatStringsSep "\n"
(mapAttrsToList
(name: spec: let dst = removePrefix "symlink:" (get-url spec); in
"verbose ln -s ${shell.escape dst} $tmpdir/${shell.escape name}")
symlink-specs)}
verbose proot \
-b $tmpdir:${shell.escape target-path} \
${concatStringsSep " \\\n "
(mapAttrsToList
(name: spec:
"-b ${shell.escape "${get-url spec}:${target-path}/${name}"}")
file-specs)} \
rsync \
-f ${shell.escape "P /*"} \
${concatMapStringsSep " \\\n "
(name: "-f ${shell.escape "R /${name}"}")
(attrNames file-specs)} \
--delete \
-vFrlptD \
${shell.escape target-path}/ \
${shell.escape "${target-user}@${target-host}:${target-path}"}
'';
get-schema = uri:
if substring 0 1 uri == "/"
then "file"
else head (splitString ":" uri);
has-schema = schema: uri: get-schema uri == schema;
get-url = spec: {
string = spec;
path = toString spec;
set = get-url spec.url;
}.${typeOf spec};
git-specs =
filterAttrs (_: spec: has-schema "https" (get-url spec)) source //
filterAttrs (_: spec: has-schema "http" (get-url spec)) source //
filterAttrs (_: spec: has-schema "git" (get-url spec)) source;
file-specs =
filterAttrs (_: spec: has-schema "file" (get-url spec)) source;
symlink-specs =
filterAttrs (_: spec: has-schema "symlink" (get-url spec)) source;
git-script = ''
#! /bin/sh
set -efu
verbose() {
printf '+' >&2
printf ' %q' "$@" >&2
printf '\n'
}
fetch_git() {(
dst_dir=$1
src_url=$2
src_ref=$3
if ! test -e "$dst_dir"; then
git clone "$src_url" "$dst_dir"
fi
cd "$dst_dir"
if ! url=$(git config remote.origin.url); then
git remote add origin "$src_url"
elif test "$url" != "$src_url"; then
git remote set-url origin "$src_url"
fi
# TODO resolve src_ref to commit hash
hash=$src_ref
if ! test "$(git log --format=%H -1)" = "$hash"; then
git fetch origin
git checkout "$hash" -- "$dst_dir"
git checkout "$hash"
fi
git clean -dxf
)}
${concatStringsSep "\n"
(mapAttrsToList
(name: spec: toString (map shell.escape [
"verbose"
"fetch_git"
"${target-path}/${name}"
spec.url
spec.rev
]))
git-specs)}
'';
in out
|
