From 1e27f9b1c0e055a0c9a5b4d51d8ae918db9fe12a Mon Sep 17 00:00:00 2001
From: Igor Kroitor <igor.kroitor@gmail.com>
Date: Tue, 29 Oct 2019 05:19:10 +0300
Subject: [PATCH] reusable build/vss

---
 .npmignore         |  1 +
 build/transpile.js |  2 +-
 build/vss.js       | 76 +++++++++++++++++++++++++++++++---------------
 3 files changed, 54 insertions(+), 25 deletions(-)

diff --git a/.npmignore b/.npmignore
index a672b63931b1..9a1533dd6e23 100644
--- a/.npmignore
+++ b/.npmignore
@@ -4,6 +4,7 @@ build/**/*
 !build/export-exchanges.js
 !build/fs.js
 !build/transpile.js
+!build/vss.js
 examples/
 node_modules/
 python/
diff --git a/build/transpile.js b/build/transpile.js
index 3755834465c4..348ad7a276d6 100644
--- a/build/transpile.js
+++ b/build/transpile.js
@@ -753,7 +753,7 @@ function transpileDerivedExchangeFile (jsFolder, filename, options) {
 
         log.cyan ('Transpiling from', filename.yellow)
 
-        [
+        ;[
             [ python2Folder, filename.replace ('.js', '.py'), python2 ],
             [ python3Folder, filename.replace ('.js', '.py'), python3 ],
             [ phpFolder, filename.replace ('.js', '.php'), php ],
diff --git a/build/vss.js b/build/vss.js
index 024059c1f866..5844536e60ea 100644
--- a/build/vss.js
+++ b/build/vss.js
@@ -13,22 +13,23 @@ const { execSync } = require ('child_process')
 
 //-----------------------------------------------------------------------------
 
-let { version } = require ('../package.json')
+function incrementVersionPatchNumber (version) {
 
-//-----------------------------------------------------------------------------
+    let [ major, minor, patch ] = version.split ('.')
 
-log.bright ('Old version: '.dim, version)
-let [ major, minor, patch ] = version.split ('.')
+    // we don't increment it here anymore, because
+    // npm version patch will be explicitly called before
 
-// we don't increment it here anymore, because
-// npm version patch will be explicitly called before
+    // patch = (parseInt (patch) + 1).toString ()
 
-// patch = (parseInt (patch) + 1).toString ()
+    version = [ major, minor, patch ].join ('.')
 
-version = [ major, minor, patch ].join ('.')
-log.bright ('New version: '.cyan, version)
+    return version
+}
 
-function vss (filename, template) {
+//-----------------------------------------------------------------------------
+
+function vss (filename, template, version) {
     log.bright.cyan ('Single-sourcing version', version, './package.json → ' + filename.yellow)
     const content = fs.readFileSync (filename, 'utf8')
     const regexp  = new RegExp (template.replace (/[-\/\\^$*+?.()|[\]{}]/g, '\\$&') // escape string for use in regexp
@@ -37,23 +38,50 @@ function vss (filename, template) {
     fs.writeFileSync (filename, content.replace (regexp, template.replace ('{version}', version)))
 }
 
-//-----------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
 
-vss ('./php/base/Exchange.php',                      "$version = '{version}'")
-vss ('./php/base/Exchange.php',                      "VERSION = '{version}'")
-vss ('./ccxt.js',                                    "const version = '{version}'")
-vss ('./python/ccxt/__init__.py',                    "__version__ = '{version}'")
-vss ('./python/ccxt/async_support/__init__.py',      "__version__ = '{version}'")
-vss ('./python/ccxt/base/exchange.py',               "__version__ = '{version}'")
-vss ('./python/ccxt/async_support/base/exchange.py', "__version__ = '{version}'")
+function vssEverything () {
 
-vss ('./README.md',       "ccxt@{version}")
-vss ('./wiki/Install.md', "ccxt@{version}")
+    let { version } = require ('../package.json')
 
-//-----------------------------------------------------------------------------
+    log.bright ('Old version: '.dim, version)
+    version = incrementVersionPatchNumber (version)
+    log.bright ('New version: '.cyan, version)
 
-execSync ('cp ./package.json ./LICENSE.txt ./keys.json ./python/')
+    vss ('./ccxt.js',                                    "const version = '{version}'", version)
+    vss ('./php/base/Exchange.php',                      "$version = '{version}'",      version)
+    vss ('./php/base/Exchange.php',                      "VERSION = '{version}'",       version)
+    vss ('./python/ccxt/__init__.py',                    "__version__ = '{version}'",   version)
+    vss ('./python/ccxt/base/exchange.py',               "__version__ = '{version}'",   version)
+    vss ('./python/ccxt/async_support/__init__.py',      "__version__ = '{version}'",   version)
+    vss ('./python/ccxt/async_support/base/exchange.py', "__version__ = '{version}'",   version)
 
-//-----------------------------------------------------------------------------
+    vss ('./README.md',       "ccxt@{version}")
+    vss ('./wiki/Install.md', "ccxt@{version}")
+
+    execSync ('cp ./package.json ./LICENSE.txt ./keys.json ./python/')
+
+    log.bright.green ('Version single-sourced successfully.')
+}
 
-log.bright.green ('Version single-sourced successfully.')
+// ============================================================================
+// main entry point
+
+if (require.main === module) {
+
+    // if called directly like `node module`
+
+    vssEverything ()
+
+} else {
+
+    // do nothing if required as a module
+}
+
+// ============================================================================
+
+module.exports = {
+    incrementVersionPatchNumber,
+    vss,
+    vssEverything,
+}