build: i18n: WIP- autodownload. joyent#7676

Author: srl295

configure

@@ -6,6 +6,8 @@ import re
 import shlex
 import subprocess
 import sys
+import urllib
+import zipfile
 
 CC = os.environ.get('CC', 'cc')
 
@@ -711,6 +713,47 @@ def glob_to_var(dir_base, dir_sub):
     break
   return list
 
+def icu_download(path):
+  # download ICU, if needed
+  icus = [
+    {
+      'url': 'http://download.icu-project.org/files/icu4c/54.1/icu4c-54_1-src.zip',
+      # from https://ssl.icu-project.org/files/icu4c/54.1/icu4c-src-54_1.md5
+      'md5': '6b89d60e2f0e140898ae4d7f72323bca',  
+    },
+  ]
+  def fmtMb(amt):
+    return "{:.1f}".format(amt / 1024000.)
+  def reporthook(count, size, total):
+    sys.stdout.write('%sMB total, %sMB downloaded   \r' %
+                     (fmtMb(total),fmtMb(count*size)))
+  for icu in icus:
+    url = icu['url']
+    md5 = icu['md5']
+    local = url.split('/')[-1]
+    targetfile = os.path.join(root_dir, 'deps', local)
+    if not os.path.isfile(targetfile):
+      try:
+        sys.stdout.write('Downloading ICU from  %s\nConnecting...\r' % url)
+        sys.stdout.flush()
+        msg = urllib.urlretrieve(url, targetfile, reporthook=reporthook)
+        sys.stdout.write('\n')  # newline
+        print 'Downloaded %s' % local
+      except:
+        print 'Error occurred while downloading %s' % url
+        raise
+      #if msg:
+      #  print msg
+    else:
+      print 'Not re-downloading %s (delete it to retry)' % targetfile
+    if os.path.isfile(targetfile) and md5 is not None:
+      print 'Should have md5sum %s' % md5
+      print 'TODO: SKIPPING md5sum check'
+      
+      
+  print 'Please see the README.md - could not automatically download ICU.'
+  return None
+
 def configure_intl(o):
   icu_config = {
     'variables': {}
@@ -776,7 +819,11 @@ def configure_intl(o):
   icu_full_path = os.path.join(root_dir, 'deps/icu')
   o['variables']['icu_path'] = icu_full_path
   if not os.path.isdir(icu_full_path):
-    print 'Error: ICU path is not a directory: %s' % (icu_full_path)
+    localzip = icu_download(icu_full_path)
+    if localzip:
+      print 'Got local zip: %s' % localzip
+  if not os.path.isdir(icu_full_path):
+    print 'Error: ICU path is not a directory and couldn\'t download: %s' % (icu_full_path)
     sys.exit(1)
   # Now, what version of ICU is it? We just need the "major", such as 54.
   # uvernum.h contains it as a #define.