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|
{
lib,
pkgs,
config,
checkForUpdates ? true,
}:
rec {
# Fetch using the Releases API (Finds the latest official GitHub Release)
fetchLatestGithubReleaseTag =
{ owner, repo }:
let
raw = builtins.fetchurl {
url = "https://api.github.com/repos/${owner}/${repo}/releases/latest";
name = "${repo}-latest-release.json";
};
json = builtins.fromJSON (builtins.readFile raw);
in
json.tag_name;
# Fetch using the Tags API (Finds the newest tag matching a prefix/regex)
fetchLatestGithubTag =
{
owner,
repo,
tagPrefix ? "",
tagRegex ? null,
}:
let
raw = builtins.fetchurl {
url = "https://api.github.com/repos/${owner}/${repo}/tags";
name = "${repo}-tags.json";
};
tags = builtins.fromJSON (builtins.readFile raw);
isValidTag =
t:
let
matchesPrefix = tagPrefix == "" || lib.hasPrefix tagPrefix t.name;
matchesRegex = tagRegex == null || builtins.match tagRegex t.name != null;
in
matchesPrefix && matchesRegex;
matchingTags = builtins.filter isValidTag tags;
in
if builtins.length matchingTags > 0 then
(builtins.head matchingTags).name
else
throw "No tags found for ${owner}/${repo} matching prefix '${tagPrefix}' and regex '${toString tagRegex}'";
# Internal helper to handle the version comparison and error message
_verifyAndThrow =
{
pname,
version,
latestTag,
tagPrefix,
urlTemplate,
updateType,
}:
let
latestVersion =
if lib.hasPrefix tagPrefix latestTag then lib.removePrefix tagPrefix latestTag else latestTag;
in
if latestVersion != version then
throw ''
[${pname}] A newer ${updateType} is available upstream — refusing to build a stale extension.
pinned version : ${version}
latest version : ${latestVersion} (tag: ${latestTag})
To upgrade, edit extensions/${pname}.nix:
1. Set version = "${latestVersion}";
2. Point the url at the new release asset:
${urlTemplate}
3. Set hash = lib.fakeHash;
then re-run your switch — it'll fail with a hash mismatch showing
the real sha256. Paste that in as the final hash.
4. Re-run once more. This check passes once pinned == latest.
To skip this check for now (e.g. offline / pure eval), set:
web.chromium.checkForUpdates = false;
''
else
version;
checkExtensionVersion =
{
pname,
owner,
repo,
version,
urlTemplate,
tagPrefix ? "",
}:
if !checkForUpdates then
version
else
let
latestTag = fetchLatestGithubReleaseTag { inherit owner repo; };
in
_verifyAndThrow {
inherit
pname
version
latestTag
tagPrefix
urlTemplate
;
updateType = "release";
};
checkExtensionVersionByTag =
{
pname,
owner,
repo,
version,
urlTemplate,
tagPrefix ? "",
tagRegex ? null,
}:
if !checkForUpdates then
version
else
let
latestTag = fetchLatestGithubTag {
inherit
owner
repo
tagPrefix
tagRegex
;
};
in
_verifyAndThrow {
inherit
pname
version
latestTag
tagPrefix
urlTemplate
;
updateType = "tag";
};
# ==========================================
# 3. EXTENSION BUILDERS
# ==========================================
# Download and unpack a zip or crx file into an unpacked extension directory
fetchUnpackedExtension =
{
pname,
version,
url,
hash,
isCrx ? false,
extensionKey ? null,
}:
pkgs.stdenv.mkDerivation {
inherit pname version;
src = pkgs.fetchurl { inherit url hash; };
nativeBuildInputs = [
config.file-management.ouch.package
pkgs.python3
];
dontUnpack = true;
buildPhase = ''
runHook preBuild
mkdir -p $out
if [ "${lib.boolToString isCrx}" = "true" ]; then
# Verify the Cr24 magic header
magic=$(head -c 4 "$src")
if [ "$magic" != "Cr24" ]; then
echo "Error: $src is not a valid CRX file" >&2
exit 1
fi
# Extract header length in bytes 8 to 11
bytes=$(od -An -j8 -N4 -tu1 "$src")
read b1 b2 b3 b4 <<< $bytes
hlen=$(( b1 + (b2 << 8) + (b3 << 16) + (b4 << 24) ))
offset=$(( 12 + hlen ))
dd if=$src of=payload.zip bs=1 skip=$offset status=none
ouch decompress payload.zip --dir $out
else
ouch decompress $src --dir $out
fi
# Flatten a single wrapping folder
if [ "$(ls -1 $out | wc -l)" -eq 1 ] && [ -d "$out"/* ]; then
shopt -s dotglob
mv "$out"/*/* "$out"/ 2>/dev/null || true
rmdir "$out"/*/ 2>/dev/null || true
shopt -u dotglob
fi
# Inject the public key into manifest.json if provided
${lib.optionalString (extensionKey != null) ''
if [ -f "$out/manifest.json" ]; then
echo "Injecting extension key into manifest.json to lock the extension ID..."
python3 -c '
import json, sys, re
manifest_path = sys.argv[1]
ext_key = sys.argv[2]
with open(manifest_path, "r", encoding="utf-8", errors="ignore") as f:
content = f.read()
# 1. Strip JS comments without corrupting URLs inside strings
pattern = r"(\"[^\"]*?\")|//.*?$|/\*.*?\*/"
clean = re.sub(pattern, lambda m: m.group(1) if m.group(1) else "", content, flags=re.DOTALL | re.MULTILINE)
# 2. Strip trailing commas in JSON objects/arrays
clean = re.sub(r",\s*([\]}])", r"\1", clean)
data = json.loads(clean)
data["key"] = ext_key
with open(manifest_path, "w", encoding="utf-8") as f:
json.dump(data, f, indent=2)
' "$out/manifest.json" "${extensionKey}"
else
echo "Warning: No manifest.json found in $out to inject the key!" >&2
fi
''}
runHook postBuild
'';
installPhase = "true";
};
mkLocalExtension =
{
pname,
srcDir,
version ? "1.0.0",
}:
pkgs.stdenv.mkDerivation {
inherit pname version;
src = srcDir;
phases = [ "installPhase" ];
installPhase = ''
mkdir -p $out
cp -r $src/* $out/
'';
};
}
|
