args : with args; let inherit (pkgs.lib) id all whatis escapeShellArg concatMapStrings concatMap mapAttrs concatLists flattenAttrs filter; inherit (builtins) getAttr hasAttr head isAttrs; in rec { # prepareRepoAttrs adds svn defaults and preparse the repo attribute sets so that they # returns in any case: # { type = git/svn; # target = path; # initialize = cmd; # must create target dir, dirname target will exist # update = cmd; # pwd will be target # default = true/false; # } prepareRepoAttrs = repo : attrs : assert (isAttrs attrs); assert (repo + "" == repo); # assert repo is a string if (! (attrs ? type)) then throw "repo type is missing of : ${whatis attrs}" # prepare svn repo else if attrs.type == "svn" then let a = { # add svn defaults url = "https://svn.nixos.org/repos/nix/${repo}/trunk"; target = "/etc/nixos/${repo}"; } // attrs; in rec { inherit (a) type target; default = if a ? default then a.default else false; initialize = "svn co ${a.url} ${a.target}"; update = initialize; # co is just as fine as svn update } # prepare git repo else if attrs.type == "git" then # sanity check for existing attrs assert (all id (map ( attr : if hasAttr attr attrs then true else throw "git repository item is missing attribute ${attr}") [ "target" "initialize" "update" ] )); let t = escapeShellArg attrs.target; in rec { inherit (attrs) type target; default = if attrs ? default then attrs.default else false; update = "cd ${t}; ${attrs.update}"; initialize = '' cd $(dirname ${t}); ${attrs.initialize} [ -d ${t} ] || { echo "git initialize failed to create target directory ${t}"; exit 1; } ${update}''; } else throw "unkown repo type ${attrs.type}"; # apply prepareRepoAttrs on each repo definition repos = mapAttrs ( repo : list : map (x : (prepareRepoAttrs repo x) // { inherit repo; } ) list ) config.installer.repos; # function returning the default repo (first one having attribute default or head of list) defaultRepo = list : head ( (filter ( attrs : attrs ? default && attrs.default == true ) list) ++ list ); # creates the nixos-checkout script nixosCheckout = makeProg { name = "nixos-checkout"; src = pkgs.writeScript "nixos-checkout" ('' #! @shell@ -e # this file is automatically generated from nixos configuration file settings (installer.repos) backupTimestamp=$(date "+%Y%m%d%H%M%S") '' + concatMapStrings ( attrs : let repoType = getAttr attrs.type config.installer.repoTypes; target = escapeShellArg attrs.target; in '' # ${attrs.type} repo ${target} PATH= for path in ${builtins.toString repoType.env}; do PATH=$PATH:$path/bin:$path/sbin done if [ -d ${target} ] && { cd ${target} && { ${ repoType.valid}; }; }; then echo; echo '>> ' updating ${attrs.type} repo ${target} set -x; ${attrs.update}; set +x else # [ make backup and ] initialize [ -e ${target} ] && mv ${target} ${target}-$backupTimestamp target=${target} [ -d "$(dirname ${target})" ] || mkdir -p "$(dirname ${target})" echo; echo '>> 'initializing ${attrs.type} repo ${target} set -x; ${attrs.initialize}; set +x fi '' ) # flatten all repo definition to one list adding the repository ( concatLists (flattenAttrs repos) ) ); }; }