flakemelt: init

Signed-off-by: Raito Bezarius <masterancpp@gmail.com>
This commit is contained in:
raito 2024-03-22 02:39:04 +01:00
commit 06b6c858d2
6 changed files with 111 additions and 0 deletions

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README.md Normal file
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# `flakemelt`
Melt your vanilla Nix expressions into a Flake.

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bootstrap.nix Normal file
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(import ./. {
lib = (import ./npins)."nixpkgs.lib" { };
})

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default.nix Normal file
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{
_bootstrapImportDependency ?
source:
if source ? outPath then _bootstrapImportDependency (import source)
else
let
evil = builtins.tryEval (source {});
in
if evil.success then evil.result else source,
sources ? (import ./npins), nixpkgs-lib ? _bootstrapImportDependency sources.nixpkgs-lib, lib ? nixpkgs-lib.lib }:
{
lib = rec {
importDependency = _bootstrapImportDependency;
melt = defaultNixFile: flakeInputs:
let
outputFun = import defaultNixFile;
dependencies = builtins.mapAttrs (n: s: importDependency s) sources;
outputs =
if builtins.isFunction outputFun then outputFun dependencies else outputFun;
in
outputs;
};
# This works because static.
# checks.x86_64-linux.test = derivation {
# name = "test-derivation";
# builder = ":";
# system = "x86_64-linux";
# };
checks = lib.genAttrs [ "x86_64-linux" ] (system: {
test = derivation {
name = "test-derivation";
builder = ":";
inherit system;
};
});
}

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flake.nix Normal file
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{
outputs = { ... }@inputs: (import ./bootstrap.nix).lib.melt ./default.nix inputs;
}

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npins/default.nix Normal file
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# Generated by npins. Do not modify; will be overwritten regularly
let
data = builtins.fromJSON (builtins.readFile ./sources.json);
version = data.version;
mkSource = spec:
assert spec ? type; let
path =
if spec.type == "Git" then mkGitSource spec
else if spec.type == "GitRelease" then mkGitSource spec
else if spec.type == "PyPi" then mkPyPiSource spec
else if spec.type == "Channel" then mkChannelSource spec
else builtins.throw "Unknown source type ${spec.type}";
in
spec // { outPath = path; };
mkGitSource = { repository, revision, url ? null, hash, ... }:
assert repository ? type;
# At the moment, either it is a plain git repository (which has an url), or it is a GitHub/GitLab repository
# In the latter case, there we will always be an url to the tarball
if url != null then
(builtins.fetchTarball {
inherit url;
sha256 = hash; # FIXME: check nix version & use SRI hashes
})
else assert repository.type == "Git"; builtins.fetchGit {
url = repository.url;
rev = revision;
# hash = hash;
};
mkPyPiSource = { url, hash, ... }:
builtins.fetchurl {
inherit url;
sha256 = hash;
};
mkChannelSource = { url, hash, ... }:
builtins.fetchTarball {
inherit url;
sha256 = hash;
};
in
if version == 3 then
builtins.mapAttrs (_: mkSource) data.pins
else
throw "Unsupported format version ${toString version} in sources.json. Try running `npins upgrade`"

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npins/sources.json Normal file
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{
"pins": {
"nixpkgs-lib": {
"type": "Git",
"repository": {
"type": "GitHub",
"owner": "RaitoBezarius",
"repo": "nixpkgs.lib"
},
"branch": "no-flakes",
"revision": "33ea5c4f5096de9796428d5137aa009834231dc9",
"url": "https://github.com/RaitoBezarius/nixpkgs.lib/archive/33ea5c4f5096de9796428d5137aa009834231dc9.tar.gz",
"hash": "0cg8b91xcs2z8qk7v5qd40019yhln2wph18p46khi6nwqs1w0mhs"
}
},
"version": 3
}