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|
{ depot, pkgs, lib, ... }:
let
bins = depot.nix.getBins pkgs.stow [ "stow" ]
// depot.nix.getBins pkgs.coreutils [ "mkdir" "ln" "printenv" "rm" ]
// depot.nix.getBins pkgs.xe [ "xe" ]
// depot.nix.getBins pkgs.lr [ "lr" ]
// depot.nix.getBins pkgs.nix [ "nix-store" ]
;
# run stow to populate the target directory with the given stow package, read from stowDir.
# Bear in mind that `stowDirOriginPath` should always be semantically bound to the given `stowDir`, otherwise stow might become rather confused.
runStow =
{
# “stow package” to stow (see manpage)
stowPackage
, # “target directory” to stow in (see manpage)
targetDir
, # The “stow directory” (see manpage), containing “stow packages” (see manpage)
stowDir
, # representative directory for the stowDir in the file system, against which stow will create relative links.
# ATTN: this is always overwritten with the contents of `stowDir`! You shouldn’t re-use the same `stowDirOriginPath` for different `stowDir`s, otherwise there might be surprises.
stowDirOriginPath
,
}: depot.nix.writeExecline "stow-${stowPackage}" { } [
# first, create a temporary stow directory to use as source
# (stow will use it to determine the origin of files)
"if"
[ bins.mkdir "-p" stowDirOriginPath ]
# remove old symlinks
"if"
[
"pipeline"
[
bins.lr
"-0"
"-t"
"depth == 1 && type == l"
stowDirOriginPath
]
bins.xe
"-0"
bins.rm
]
# create an indirect gc root so our config is not cleaned under our asses by a garbage collect
"if"
[
bins.nix-store
"--realise"
"--indirect"
"--add-root"
"${stowDirOriginPath}/.nix-stowdir-gc-root"
stowDir
]
# populate with new stow targets
"if"
[
"elglob"
"-w0"
"stowPackages"
"${stowDir}/*"
bins.ln
"--force"
"-st"
stowDirOriginPath
"$stowPackages"
]
# stow always looks for $HOME/.stowrc to read more arguments
"export"
"HOME"
"/homeless-shelter"
bins.stow
# always run restow for now; this does more stat but will remove stale links
"--restow"
"--dir"
stowDirOriginPath
"--target"
targetDir
stowPackage
];
# create a stow dir from a list of drv paths and a stow package name.
makeStowDir =
(with depot.nix.yants;
defun
[
(list (struct {
originalDir = drv;
stowPackage = string;
}))
drv
])
(dirs:
depot.nix.runExecline "make-stow-dir"
{
stdin = lib.pipe dirs [
(map depot.users.Profpatsch.netencode.gen.dwim)
depot.users.Profpatsch.netstring.toNetstringList
];
} [
"importas"
"out"
"out"
"if"
[ bins.mkdir "-p" "$out" ]
"forstdin"
"-d"
""
"-o"
"0"
"line"
"pipeline"
[
depot.users.Profpatsch.execline.print-one-env
"line"
]
depot.users.Profpatsch.netencode.record-splice-env
"importas"
"-ui"
"originalDir"
"originalDir"
"importas"
"-ui"
"stowPackage"
"stowPackage"
bins.ln
"-sT"
"$originalDir"
"\${out}/\${stowPackage}"
]);
in
# TODO: temp setup
lib.pipe { } [
(_: makeStowDir [{
stowPackage = "scripts";
originalDir = pkgs.linkFarm "scripts-farm" [
{
name = "scripts/ytextr";
path = depot.users.Profpatsch.ytextr;
}
];
}])
(d: runStow {
stowDir = d;
stowPackage = "scripts";
targetDir = "/home/philip";
stowDirOriginPath = "/home/philip/.local/share/nix-home/stow-origin";
})
]
|
