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