Add release installer (#639)

tools/install.py

@@ -0,0 +1,99 @@
+#!/usr/bin/env python
+# Copyright 2018 the Deno authors. All rights reserved. MIT license.
+from __future__ import print_function
+import os
+import json
+import sys
+import tempfile
+import shutil
+import gzip
+from zipfile import ZipFile
+import re
+try:
+    from urllib.request import urlopen
+except ImportError:
+    from urllib2 import urlopen
+
+releases_url_html = "https://github.com/denoland/deno/releases/latest"
+install_dir = os.path.join(tempfile.gettempdir(), "deno_install")
+home = os.path.expanduser("~")
+
+def get_latest_url():
+    res = urlopen(releases_url_html)
+    html = res.read().decode('utf-8')
+    urls = re.findall(r'href=[\'"]?([^\'" >]+)', html)
+
+    filename = {
+        "darwin": "deno_osx_x64.gz",
+        # python3 sys.platform returns linux ( python2 returns linux2 )
+        "linux": "deno_linux_x64.gz",
+        "linux2": "deno_linux_x64.gz",
+        "win32": "deno_win_x64.zip",
+        "cygwin": "deno_win_x64.zip"
+    }[sys.platform]
+
+    matching = [u for u in urls if filename in u]
+
+    if len(matching) != 1:
+        print("Bad download url")
+        print("urls", urls)
+        print("matching", matching)
+        sys.exit(1)
+
+    return "https://github.com" + matching[0]
+
+        
+def main():
+    latest_url = get_latest_url()
+    latest_fn = dlfile(latest_url)
+
+    bin_dir = deno_bin_dir()
+    exe_fn = os.path.join(bin_dir, "deno")
+
+    if "zip" in latest_fn:
+        with ZipFile(latest_fn, 'r') as z:
+            with open(exe_fn, 'wb+') as exe:
+                exe.write(z.read('deno.exe'))
+    else:
+        with gzip.open(latest_fn, 'rb') as f:
+            content = f.read()
+            with open(exe_fn, 'wb+') as exe:
+                exe.write(content)
+
+    os.chmod(exe_fn, 0o744)
+    print("DENO_EXE: " + exe_fn)
+    print("Now manually add %s to your $PATH" % bin_dir)
+    print("Example:")
+    print()
+    print("  echo export PATH=\"%s\":\\$PATH >> $HOME/.bash_profile" % bin_dir)
+    print()
+
+
+def mkdir(d):
+    if not os.path.exists(d):
+        print("mkdir", d)
+        os.mkdir(d)
+
+
+def deno_bin_dir():
+    install_dir = home
+    d = os.path.join(install_dir, ".deno")
+    b = os.path.join(d, "bin")
+    mkdir(d)
+    mkdir(b)
+    return b
+
+
+def dlfile(url):
+    print("Downloading " + url)
+    f = urlopen(url)
+    mkdir(install_dir)
+    p = os.path.join(install_dir, os.path.basename(url))
+    print("Writing " + p)
+    with open(p, "wb") as local_file:
+        local_file.write(f.read())
+    return p
+
+
+if __name__ == '__main__':
+    main()