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Use PNDP for generating Nix expressions

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This commit is contained in:
Sander van der Burg 2017-09-12 00:06:27 +02:00
parent b12373a127
commit da4e2d914a
3 changed files with 154 additions and 76 deletions
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6
composer.json
View file

@ -10,7 +10,11 @@
"homepage": "http://sandervanderburg.nl"
}
],
"require": {
"svanderburg/pndp": "0.0.1"
},
"autoload": {
"psr-4": { "Composer2Nix\\": "src/Composer2Nix" }
},

58
composer.lock generated Normal file
View file

@ -0,0 +1,58 @@
{
"_readme": [
"This file locks the dependencies of your project to a known state",
"Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
"This file is @generated automatically"
],
"content-hash": "47e170ac01f841e2b8ccd83d2ba65429",
"packages": [
{
"name": "svanderburg/pndp",
"version": "0.0.1",
"source": {
"type": "git",
"url": "https://github.com/svanderburg/pndp.git",
"reference": "99b0904e0f2efb35b8f012892912e0d171e9c2da"
},
"dist": {
"type": "path",
"url": "https://api.github.com/repos/svanderburg/pndp/zipball/99b0904e0f2efb35b8f012892912e0d171e9c2da",
"reference": "99b0904e0f2efb35b8f012892912e0d171e9c2da",
"shasum": null
},
"bin": [
"bin/pndp-build"
],
"type": "library",
"autoload": {
"psr-4": {
"PNDP\\": "src/PNDP"
}
},
"autoload-dev": {
"psr-4": {
"Pkgs\\": "tests/Pkgs"
}
},
"license": [
"MIT"
],
"authors": [
{
"name": "Sander van der Burg",
"email": "svanderburg@gmail.com",
"homepage": "http://sandervanderburg.nl"
}
],
"description": "PNDP: An internal DSL for Nix in PHP"
}
],
"packages-dev": [],
"aliases": [],
"minimum-stability": "stable",
"stability-flags": [],
"prefer-stable": false,
"prefer-lowest": false,
"platform": [],
"platform-dev": []
}

166
src/Composer2Nix/Generator.php
View file

@ -1,23 +1,21 @@
<?php
namespace Composer2Nix;
use Exception;
use PNDP\NixGenerator;
use PNDP\AST\NixAttrReference;
use PNDP\AST\NixAttrSet;
use PNDP\AST\NixExpression;
use PNDP\AST\NixFile;
use PNDP\AST\NixFunction;
use PNDP\AST\NixFunInvocation;
use PNDP\AST\NixImport;
use PNDP\AST\NixInherit;
use PNDP\AST\NixLet;
use PNDP\AST\NixNoDefault;
use PNDP\AST\NixURL;
class Generator
{
private static function composeNixFilePath($path)
{
// Prefix certain relative paths so that they are of the path type in the Nix expression language
if((strlen($path) > 0 && substr($path, 0, 1) === "/") || (strlen($path) > 1 && substr($path, 0, 2) === "./") || (strlen($path) > 2 && substr($path, 0, 3) === "../"))
$normalizedPath = $path;
else
$normalizedPath = "./".$path;
if(strpos($normalizedPath, ' ') === false)
return $normalizedPath; // Path names without spaces don't require any escaping
else
return '/. + "'.$normalizedPath.'"'; // Compose a path containing spaces
}
private static function selectSourceObject($preferredInstall, $package)
{
if($preferredInstall === "source")
@ -40,6 +38,14 @@ class Generator
}
}
private static function prefixRelativePath($target)
{
if(substr($target, 0, 1) == "/" || substr($target, 0, 2) == "./" || substr($target, 0, 3) == "../")
return $target;
else
return "./".$target;
}
private static function generatePackagesExpression($outputFile, $name, $preferredInstall, array $packages, $executable)
{
$handle = fopen($outputFile, "w");
@ -47,51 +53,46 @@ class Generator
if($handle === false)
throw new Exception("Cannot write to: ".$outputFile);
fwrite($handle, "{composerEnv, fetchurl, fetchgit ? null, fetchhg ? null, fetchsvn ? null}:\n\n");
fwrite($handle, "let\n");
fwrite($handle, " dependencies = {\n");
$dependencies = array();
foreach($packages as $package)
{
fwrite($handle, ' "'.$package["name"].'" = {'."\n");
$dependency = array();
if(array_key_exists("target-dir", $package))
$targetDir = $package["target-dir"];
$dependency["targetDir"] = $package["target-dir"];
else
$targetDir = "";
fwrite($handle, ' targetDir = "'.$targetDir.'";'."\n");
$dependency["targetDir"] = "";
$sourceObj = Generator::selectSourceObject($preferredInstall, $package);
switch($sourceObj["type"])
{
case "path":
fwrite($handle, ' src = '.Generator::composeNixFilePath($sourceObj['url']).";\n");
$dependency["src"] = new NixFile($sourceObj['url']);
break;
case "zip":
fwrite($handle, " src = composerEnv.buildZipPackage {\n");
if($sourceObj["reference"] == "")
$reference = "";
else
$reference = "-".$sourceObj["reference"];
fwrite($handle, ' name = "'.strtr($package["name"], "/", "-").$reference.'";'."\n");
if(substr($sourceObj["url"], 0, 7) === "http://" || substr($sourceObj["url"], 0, 8) === "https://")
{
$hash = shell_exec('nix-prefetch-url "'.$sourceObj['url'].'"');
fwrite($handle, " src = fetchurl {\n");
fwrite($handle, ' url = "'.$sourceObj["url"].'";'."\n");
fwrite($handle, ' sha256 = "'.substr($hash, 0, -1).'";'."\n");
fwrite($handle, " };\n");
$src = new NixFunInvocation(new NixFile("fetchurl"), array(
"url" => new NixURL($sourceObj["url"]),
"sha256" => substr($hash, 0, -1)
));
}
else
fwrite($handle, " src = ".Generator::composeNixFilePath($sourceObj['url']).";\n");
$src = new NixFile($sourceObj['url']);
fwrite($handle, " };\n");
$dependency["src"] = new NixFunInvocation(new NixExpression("composerEnv.buildZipPackage", array(
"name" => strtr($package["name"], "/", "-").$reference,
"src" => $src
)));
break;
case "git":
@ -100,52 +101,58 @@ class Generator
$output = json_decode($outputStr, true);
$hash = $output["sha256"];
fwrite($handle, " src = fetchgit {\n");
fwrite($handle, ' name = "'.strtr($package["name"], "/", "-").'-'.$sourceObj["reference"].'";'."\n");
fwrite($handle, ' url = "'.$sourceObj["url"].'";'."\n");
fwrite($handle, ' rev = "'.$sourceObj["reference"].'";'."\n");
fwrite($handle, ' sha256 = "'.$hash.'";'."\n");
fwrite($handle, " };\n");
$dependency["src"] = new NixFunInvocation(new NixExpression("fetchgit"), array(
"name" => strtr($package["name"], "/", "-").'-'.$sourceObj["reference"],
"url" => $sourceObj["url"],
"rev" => $sourceObj["reference"],
"sha256" => $hash
));
break;
case "hg":
$hash = shell_exec('nix-prefetch-hg "'.$sourceObj['url'].'" '.$sourceObj["reference"]);
fwrite($handle, " src = fetchhg {\n");
fwrite($handle, ' name = "'.strtr($package["name"], "/", "-").'-'.$sourceObj["reference"].'";'."\n");
fwrite($handle, ' url = "'.$sourceObj["url"].'";'."\n");
fwrite($handle, ' rev = "'.$sourceObj["reference"].'";'."\n");
fwrite($handle, ' sha256 = "'.substr($hash, 0, -1).'";'."\n");
fwrite($handle, " };\n");
$dependency["src"] = new NixFunInvocation(new NixExpression("fetchhg"), array(
"name" => strtr($package["name"], "/", "-").'-'.$sourceObj["reference"],
"url" => $sourceObj["url"],
"rev" => $sourceObj["reference"],
"sha256" => $hash
));
break;
case "svn":
$hash = shell_exec('nix-prefetch-svn "'.$sourceObj['url'].'" '.$sourceObj["reference"]);
fwrite($handle, " src = fetchsvn {\n");
fwrite($handle, ' name = "'.strtr($package["name"], "/", "-").'-'.$sourceObj["reference"].'";'."\n");
fwrite($handle, ' url = "'.$sourceObj["url"].'";'."\n");
fwrite($handle, ' rev = "'.$sourceObj["reference"].'";'."\n");
fwrite($handle, ' sha256 = "'.substr($hash, 0, -1).'";'."\n");
fwrite($handle, " };\n");
$dependency["src"] = new NixFunInvocation(new NixExpression("fetchsvn"), array(
"name" => strtr($package["name"], "/", "-").'-'.$sourceObj["reference"],
"url" => $sourceObj["url"],
"rev" => $sourceObj["reference"],
"sha256" => $hash
));
break;
default:
throw new Exception("Cannot convert dependency of type: ".$sourceObj["type"]);
}
fwrite($handle, " };\n");
$dependencies[$package["name"]] = $dependency;
}
fwrite($handle, " };\n");
fwrite($handle, "in\n");
fwrite($handle, "composerEnv.buildPackage {\n");
fwrite($handle, ' name = "'.$name.'";'."\n");
fwrite($handle, " src = ./.;\n");
fwrite($handle, " executable = ".($executable ? "true" : "false").";\n");
fwrite($handle, " inherit dependencies;\n");
fwrite($handle, "}\n");
$expr = new NixFunction(array(
"composerEnv" => new NixNoDefault(),
"fetchurl" => new NixNoDefault(),
"fetchgit" => null,
"fetchhg" => null,
"fetchsvn" => null
), new NixLet(array(
"dependencies" => new NixAttrSet($dependencies)
), new NixFunInvocation(new NixExpression("composerEnv.buildPackage"), array(
"name" => $name,
"src" => new NixFile("./."),
"executable" => $executable,
"dependencies" => new NixInherit()
))));
$exprStr = NixGenerator::phpToNix($expr, true);
fwrite($handle, $exprStr);
fclose($handle);
}
@ -156,20 +163,29 @@ class Generator
if($handle === false)
throw new Exception("Cannot write to: ".$compositionFile);
fwrite($handle, "{ pkgs ? import <nixpkgs> { inherit system; }\n");
fwrite($handle, ", system ? builtins.currentSystem\n");
fwrite($handle, "}:\n\n");
fwrite($handle, "let\n");
fwrite($handle, " composerEnv = import ".Generator::composeNixFilePath($composerEnvFile)." {\n");
fwrite($handle, " inherit (pkgs) stdenv writeTextFile fetchurl php unzip;\n");
fwrite($handle, " };\n");
fwrite($handle, "in\n");
fwrite($handle, "import ".Generator::composeNixFilePath($outputFile)." {\n");
fwrite($handle, " inherit composerEnv;\n");
fwrite($handle, " inherit (pkgs) fetchurl fetchgit fetchhg fetchsvn;\n");
fwrite($handle, "}\n");
$expr = new NixFunction(array(
"pkgs" => new NixFunInvocation(new NixImport(new NixExpression("<nixpkgs>")), array(
"system" => new NixInherit()
)),
"system" => new NixAttrReference(new NixExpression("builtins"), new NixExpression("currentSystem"))
), new NixLet(array(
"composerEnv" => new NixFunInvocation(new NixImport(new NixFile(Generator::prefixRelativePath($composerEnvFile))), array(
"stdenv" => new NixInherit("pkgs"),
"writeTextFile" => new NixInherit("pkgs"),
"fetchurl" => new NixInherit("pkgs"),
"php" => new NixInherit("pkgs"),
"unzip" => new NixInherit("pkgs")
))
), new NixFunInvocation(new NixImport(new NixFile(Generator::prefixRelativePath($outputFile))), array(
"composerEnv" => new NixInherit(),
"fetchurl" => new NixInherit("pkgs"),
"fetchgit" => new NixInherit("pkgs"),
"fetchhg" => new NixInherit("pkgs"),
"fetchsvn" => new NixInherit("pkgs")
))));
$exprStr = NixGenerator::phpToNix($expr, true);
fwrite($handle, $exprStr);
fclose($handle);
}