[SUPPORTIVE PATCH 0.17.200] build and use statically linked zlib-1.2.8 with notmuch

[Tomi Ollila]

¡¡ NOT TO BE MERGED TO NOTMUCH REPOSITORY !!

(Due to its intrusive nature this patch is not suitable for merging.)

Recent notmuch(*) requires zlib 1.2.5.2 or newer; systems that have older
versions of zlib installed can use this patch to use zlib 1.2.8 with
notmuch but keep the current one to be used by default.

Note that zlib 1.2.8 will be downloaded (if not already there) and built
during ./configure time.

(since ~ 0.17-194-g3921d23 -- Sat 2014-04-12)
---

HTH :)

Tomi

 Makefile.local       |  7 ++--
 compat/build-zlib.py | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 configure            |  7 ++++
 3 files changed, 108 insertions(+), 2 deletions(-)
 create mode 100755 compat/build-zlib.py

diff --git a/Makefile.local b/Makefile.local
index 877a979..1780cee 100644
--- a/Makefile.local
+++ b/Makefile.local
@@ -292,11 +292,14 @@ notmuch_client_modules = $(notmuch_client_srcs:.c=.o)
 
 notmuch.o: version.stamp
 
+# XXX ZA used in unofficial supportive patch which uses self-built zlib XXX
+ZA=./compat/zlib-1.2.8/libz.a
+
 notmuch: $(notmuch_client_modules) lib/libnotmuch.a util/libutil.a parse-time-string/libparse-time-string.a
-	$(call quiet,CXX $(CFLAGS)) $^ $(FINAL_LIBNOTMUCH_LDFLAGS) -o $@
+	$(call quiet,CXX $(CFLAGS)) $^ $(ZA) $(FINAL_LIBNOTMUCH_LDFLAGS) -o $@
 
 notmuch-shared: $(notmuch_client_modules) lib/$(LINKER_NAME)
-	$(call quiet,$(FINAL_NOTMUCH_LINKER) $(CFLAGS)) $(notmuch_client_modules) $(FINAL_NOTMUCH_LDFLAGS) -o $@
+	$(call quiet,$(FINAL_NOTMUCH_LINKER) $(CFLAGS)) $(notmuch_client_modules) $(ZA) $(FINAL_NOTMUCH_LDFLAGS) -o $@
 
 .PHONY: install
 install: all install-man
diff --git a/compat/build-zlib.py b/compat/build-zlib.py
new file mode 100755
index 0000000..25e21d9
--- /dev/null
+++ b/compat/build-zlib.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# $ build-zlib.py $
+#
+# Authors: Tomi Ollila,
+# License: Public Domain
+#
+# Created: Sat 12 Apr 2014 17:51:42 EEST too
+# Last modified: Sat 12 Apr 2014 18:52:06 +0300 too
+
+# Not using string.format() for python 2.5 compatibility.
+# Not using print due to python version 2 & 3 differences.
+
+# The seemlingly extra 'pass'es work with python mode provided
+# with Emacs 24.1 and earlier (indentation!)...
+
+import sys
+import os
+try:  # Python 3
+    from urllib.request import urlopen
+except ImportError:  # Python 2
+    from urllib import urlopen
+import shutil
+import hashlib
+
+ZLIBurl='http://prdownloads.sourceforge.net/libpng/zlib-1.2.8.tar.gz?download'
+ZLIBtgz='zlib-1.2.8.tar.gz'
+ZLIBsum='36658cb768a54c1d4dec43c3116c27ed893e88b02ecfcb44f2166f9c0b7f2a0d'
+ZLIBdir='zlib-1.2.8'
+
+
+class Die(Exception):
+    def __init__(self, *_list):
+        sys.stderr.write("\n")
+        sys.stderr.write(_list[0] % _list[1:])
+        sys.stderr.write("\n\n")
+        raise SystemExit(1)
+    pass
+
+
+def dl_zlibtgz():
+    sys.stdout.write("Downloading %s...\n" % ZLIBtgz)
+    response = urlopen(ZLIBurl)
+    # python3 throws urllib.error.HTTPError, python2 does not.
+    if response.getcode() != 200:
+        sys.stderr.write(response.read(4096))  # max 4096 octets
+        exit(1)
+    outfile = open(ZLIBtgz, 'wb')
+    shutil.copyfileobj(response, outfile)
+    pass
+
+
+def main():
+    if not os.path.isfile(ZLIBtgz):
+        dl_zlibtgz()
+        pass
+
+    sys.stdout.write("Checksumming %s...\n" % ZLIBtgz)
+    infile = open(ZLIBtgz, 'rb')
+    sha256 = hashlib.sha256()
+    while True:
+        data = infile.read(65536)
+        if not data:
+            break
+        sha256.update(data)
+        pass
+    sys.stdout.write(" Expt'd sha256 %s\n" % ZLIBsum)
+    hexdigest = sha256.hexdigest()
+    sys.stdout.write(" Actual sha256 %s\n" % hexdigest)
+    if hexdigest != ZLIBsum:
+        raise Die("File '%s' checksum mismatch", ZLIBtgz)
+    pass
+
+    target = ZLIBdir + '/libz.a'
+    if os.path.isfile(target):
+        sys.stdout.write("'%s' exists. OK.\n" % target)
+        raise SystemExit(0)
+
+    def x(*args):
+        sys.stdout.write('x ' + ' '.join(args) + '\n')
+        os.spawnvp(os.P_WAIT, args[0], args)
+        pass
+
+    sys.stdout.write('Building %s\n' % ZLIBdir)
+    x ('rm', '-rf', ZLIBdir)
+    x ('tar', '-zxf', ZLIBtgz)
+    os.chdir(ZLIBdir)
+    x ('./configure')
+    x ('make')
+    os.chdir('..')
+    if not os.path.isfile(target):
+        raise Die("Could not build '%s' for some reason!", target)
+
+if __name__ == '__main__':
+    main()
+    pass  # pylint: disable=W0107
diff --git a/configure b/configure
index f447581..4ba0403 100755
--- a/configure
+++ b/configure
@@ -342,6 +342,13 @@ fi
 
 printf "Checking for zlib (>= 1.2.5.2)... "
 have_zlib=0
+# XXX unofficial supportive patch to use self-built zlib XXX
+printf "Checking/building zlib 1.2.8:\n"
+(cd compat; exec ../"$srcdir"/compat/build-zlib.py)
+have_zlib=1
+zlib_cflags="-I ./compat/zlib-1.2.8"
+zlib_ldflags=
+: ||
 if pkg-config --atleast-version=1.2.5.2 zlib; then
     printf "Yes.\n"
     have_zlib=1
-- 
1.8.0