Simplify output of gen_travis.py script

This commit simplifies the output of the
`gen_travis.py` script by reusing addons.

The `.travis.yml` script is updated to
reflect these changes.

.travis.yml

@@ -11,7 +11,7 @@ matrix:
       env: CC=clang CXX=clang++ COMPILER_FLAGS="" CONFIGURE_FLAGS="" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
+      addons: &gcc_multilib
         apt:
           packages:
             - gcc-multilib
@@ -41,10 +41,7 @@ matrix:
       env: CC=gcc CXX=g++ COMPILER_FLAGS="" CONFIGURE_FLAGS="--with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       env: CC=clang CXX=clang++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=clang CXX=clang++ COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
@@ -61,46 +58,25 @@ matrix:
       env: CC=clang CXX=clang++ COMPILER_FLAGS="" CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-debug" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--disable-stats" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=tcache:false" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=dss:primary" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=percpu_arena:percpu" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="-m32" CONFIGURE_FLAGS="--with-malloc-conf=background_thread:true" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
-      addons:
-        apt:
-          packages:
-            - gcc-multilib
+      addons: *gcc_multilib
     - os: linux
       env: CC=gcc CXX=g++ COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug --enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
     - os: linux
@@ -150,6 +126,7 @@ matrix:
         - make -j test/unit/log
         - test/unit/log
 
+
 before_script:
   - autoconf
   - ./configure ${COMPILER_FLAGS:+       CC="$CC $COMPILER_FLAGS"       CXX="$CXX $COMPILER_FLAGS" }       $CONFIGURE_FLAGS

scripts/gen_travis.py

@@ -4,6 +4,7 @@ from itertools import combinations
 
 travis_template = """\
 language: generic
+dist: precise
 
 matrix:
   include:
@@ -61,47 +62,58 @@ unusual_combinations_to_test = []
 for i in xrange(MAX_UNUSUAL_OPTIONS + 1):
     unusual_combinations_to_test += combinations(all_unusuals, i)
 
-include_rows = ""
-for unusual_combination in unusual_combinations_to_test:
-    os = os_default
-    if os_unusual in unusual_combination:
-        os = os_unusual
+gcc_multilib_set = False
+# Formats a job from a combination of flags
+def format_job(combination):
+    global gcc_multilib_set
 
-    compilers = compilers_default
-    if compilers_unusual in unusual_combination:
-        compilers = compilers_unusual
+    os = os_unusual if os_unusual in combination else os_default
+    compilers = compilers_unusual if compilers_unusual in combination else compilers_default
 
-    compiler_flags = [
-        x for x in unusual_combination if x in compiler_flag_unusuals]
+    compiler_flags = [x for x in combination if x in compiler_flag_unusuals]
+    configure_flags = [x for x in combination if x in configure_flag_unusuals]
+    malloc_conf = [x for x in combination if x in malloc_conf_unusuals]
 
-    configure_flags = [
-        x for x in unusual_combination if x in configure_flag_unusuals]
-
-    malloc_conf = [
-        x for x in unusual_combination if x in malloc_conf_unusuals]
     # Filter out unsupported configurations on OS X.
     if os == 'osx' and ('dss:primary' in malloc_conf or \
       'percpu_arena:percpu' in malloc_conf or 'background_thread:true' \
       in malloc_conf):
-        continue
+        return ""
     if len(malloc_conf) > 0:
         configure_flags.append('--with-malloc-conf=' + ",".join(malloc_conf))
 
     # Filter out an unsupported configuration - heap profiling on OS X.
     if os == 'osx' and '--enable-prof' in configure_flags:
-        continue
+        return ""
 
     # We get some spurious errors when -Warray-bounds is enabled.
     env_string = ('{} COMPILER_FLAGS="{}" CONFIGURE_FLAGS="{}" '
 	'EXTRA_CFLAGS="-Werror -Wno-array-bounds"').format(
         compilers, " ".join(compiler_flags), " ".join(configure_flags))
 
-    include_rows += '    - os: %s\n' % os
-    include_rows += '      env: %s\n' % env_string
-    if '-m32' in unusual_combination and os == 'linux':
-        include_rows += '      addons:\n'
-	include_rows += '        apt:\n'
-	include_rows += '          packages:\n'
-	include_rows += '            - gcc-multilib\n'
+    job = ""
+    job += '    - os: %s\n' % os
+    job += '      env: %s\n' % env_string
+    if '-m32' in combination and os == 'linux':
+        job += '      addons:'
+        if gcc_multilib_set:
+            job += ' *gcc_multilib\n'
+        else:
+            job += ' &gcc_multilib\n'
+            job += '        apt:\n'
+            job += '          packages:\n'
+            job += '            - gcc-multilib\n'
+            gcc_multilib_set = True
+    return job
+
+include_rows = ""
+for combination in unusual_combinations_to_test:
+    include_rows += format_job(combination)
+
+# Development build
+include_rows += '''\
+    - os: linux
+      env: CC=gcc CXX=g++ COMPILER_FLAGS="" CONFIGURE_FLAGS="--enable-debug --disable-cache-oblivious --enable-stats --enable-log --enable-prof" EXTRA_CFLAGS="-Werror -Wno-array-bounds"
+'''
 
 print travis_template % include_rows