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"use strict";
const fs = require("fs");
const path = require("path");
const { https } = require("follow-redirects");
const semver = require("semver");
const tar = require("tar");
const unbz2 = require("unbzip2-stream");
const unzipper = require("unzipper");
const pkg = require("./package.json");
const bindir = path.join(__dirname, "bin");
const formatVersionKey = name =>
`${name}-version`;
const toSnakeCase = name =>
name.replace(/-/g, '_');
const formatNpmCfgVar = name =>
toSnakeCase(name.toLowerCase());
const formatEnvVar = name =>
toSnakeCase(name.toUpperCase());
const prefixNpmCfgKey = key =>
`${pkg.name}:${key}`;
const readVersionWith = (lookup, discard = () => {}) => name => {
const key = formatVersionKey(name);
const version = lookup(key);
return version ? {
get version() { return String(version).trim() },
discard() { discard(key, version) },
orElse(alt) { alt.discard(); return this }
} : {
get version() {
throw new Error(`Missing \`${name}\` version! You can provide it as a \`${prefixNpmCfgKey(key)}\` npm configuration parameter or as a \`${formatEnvVar(key)}\` environment variable.`);
},
discard() {},
orElse(alt) { return alt }
};
};
const readPkgVersion = readVersionWith(key => pkg[key]);
const readCfgVersion = readVersionWith(key => {
return process.env[`npm_config_${formatNpmCfgVar(pkg.name)}_${formatNpmCfgVar(key)}`];
}, (key, version) => {
console.warn(`Ignoring \`${prefixNpmCfgKey(key)}\` npm configuration parameter (${version}).`);
});
const readEnvVersion = readVersionWith(key => {
return process.env[formatEnvVar(key)];
}, (key, version) => {
console.warn(`Ignoring \`${formatEnvVar(key)}\` environment variable (${version}).`);
});
const readVersion = name =>
readPkgVersion(name)
.orElse(readEnvVersion(name))
.orElse(readCfgVersion(name))
.version;
const dhallVersion = readVersion("dhall");
const dhallJsonVersion = readVersion("dhall-json");
if (semver.valid(dhallJsonVersion) && semver.lt(dhallJsonVersion, "1.2.8")) {
throw new Error(`This release of the \`${pkg.name}\` npm package installs \`json-to-dhall\`, which isn’t provided by \`dhall-json@<1.2.8\`.`);
}
const release = `https://github.com/dhall-lang/dhall-haskell/releases/download/${dhallVersion}/dhall-json-${dhallJsonVersion}`;
const get = (archive, callback) => {
const url = `${release}-${archive}`;
return https.get(url, res => {
if (res.statusCode >= 400) throw new Error(`Error fetching ${url}: ${res.statusMessage}`);
return callback(res);
});
};
if (process.platform === "win32") {
get("x86_64-windows.zip", res =>
res.pipe(unzipper.Extract({ path: bindir }))
);
} else {
get("x86_64-linux.tar.bz2", res =>
res.pipe(unbz2()).pipe(tar.x({ C: __dirname }).on("finish", () => {
fs.readdir(bindir, (err, names) => {
if (err) throw err;
for (const name of names) {
fs.rename(path.join(bindir, name), path.join(bindir, name + ".exe"), err => {
if (err) throw err;
});
}
});
}))
);
}
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