mirror of
https://cgit.krebsco.de/krops
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70fa39607f
Let ssh use the user configured in its configuration files when the target user is set to the empty string. Closes https://github.com/krebs/krops/issues/2
75 lines
2.3 KiB
Nix
75 lines
2.3 KiB
Nix
let {
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body = lib;
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lib = nixpkgs.lib // builtins // {
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evalSource = let
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eval = source: lib.evalModules {
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modules = lib.singleton {
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_file = toString ./.;
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imports = map (source: { inherit source; }) (lib.toList source);
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options.source = lib.mkOption {
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default = {};
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type = lib.types.attrsOf lib.types.source;
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};
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};
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};
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sanitize = x: lib.getAttr (lib.typeOf x) {
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bool = x;
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list = map sanitize x;
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set = lib.mapAttrs
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(lib.const sanitize)
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(lib.filterAttrs
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(name: value: name != "_module" && value != null) x);
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string = x;
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};
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in
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# This function's return value can be used as pkgs.populate input.
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source: sanitize (eval source).config.source;
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getHostName = let
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# We're parsing /etc/hostname here because reading
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# /proc/sys/kernel/hostname yields ""
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y = lib.filter lib.types.label.check (lib.splitString "\n" (lib.readFile /etc/hostname));
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in
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if lib.length y != 1 then throw "malformed /etc/hostname" else
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lib.elemAt y 0;
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isLocalTarget = let
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origin = lib.mkTarget "";
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in target:
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target.user == origin.user &&
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lib.elem target.host [origin.host "localhost"];
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mkTarget = s: let
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default = defVal: val: if val != null then val else defVal;
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parse = lib.match "(([^@]*)@)?(([^:/]+))?(:([^/]+))?(/.*)?" s;
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elemAt' = xs: i: if lib.length xs > i then lib.elemAt xs i else null;
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in if lib.isString s then {
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user = default (lib.getEnv "LOGNAME") (elemAt' parse 1);
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host = default (lib.maybeEnv "HOSTNAME" lib.getHostName) (elemAt' parse 3);
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port = default "22" /* "ssh"? */ (elemAt' parse 5);
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path = default "/var/src" /* no default? */ (elemAt' parse 6);
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sudo = false;
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} else s;
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shell = let
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isSafeChar = lib.testString "[-+./0-9:=A-Z_a-z]";
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quoteChar = c:
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if isSafeChar c then c
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else if c == "\n" then "'\n'"
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else "\\${c}";
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in {
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quote = x: if x == "" then "''" else lib.stringAsChars quoteChar x;
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};
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test = re: x: lib.isString x && lib.testString re x;
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testString = re: x: lib.match re x != null;
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types = nixpkgs.lib.types // import ./types { lib = body; };
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};
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nixpkgs.lib = import <nixpkgs/lib>;
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}
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