Avoid RE compile unneeded unless LOOKUP_MODULE_DIR defined

[exim.git] / src / scripts / lookups-Makefile

diff --git a/src/scripts/lookups-Makefile b/src/scripts/lookups-Makefile
index 7f2dd1b9e60b2b93bb55c76c5654f49f9532d891..4e69a9a775afa014465ab92e70b7b9c778f82870 100755 (executable)
--- a/src/scripts/lookups-Makefile
+++ b/src/scripts/lookups-Makefile
@@ -2,43 +2,129 @@
 
 # We turn the configure-built build-$foo/lookups/Makefile.predynamic into Makefile
 
 
 # We turn the configure-built build-$foo/lookups/Makefile.predynamic into Makefile
 

+# We always re-exec ourselves at least once, because it's the cleanest and
+# most portable way to turn on various features we expect of POSIX sh.
+if [ -z "$EXIM_LOOKUP_MAKEFILE_ADJUSTED" ]
+then
+  SHELL=/bin/sh
+  EXIM_LOOKUP_MAKEFILE_ADJUSTED=yes
+  export EXIM_LOOKUP_MAKEFILE_ADJUSTED
+
+  # Solaris sh and tr are problematic until we get xpg4 variants
+  if [ -x /usr/xpg4/bin/sh ]
+  then
+    PATH="/usr/xpg4/bin:$PATH"
+    export PATH
+    SHELL=/usr/xpg4/bin/sh
+    export SHELL
+  fi
+
+  # IRIX uses /bin/ksh for sh but in a compatibility mode unless $_XPG == 1,
+  # where said compatibility mode disables $(...)
+  _XPG=1
+  export _XPG
+
+  # We need the _right_ tr, so must do that first; but if a shell which
+  # we're more confident is sane is available, let's try that.  Mostly,
+  # the problem is that "local" is not actually in "the" standard, it's
+  # just in every not-insane shell.  Though arguably, there are no shells
+  # with POSIX-ish syntax which qualify as "not insane".
+  for b in /bin/dash /bin/bash /usr/local/bin/bash
+  do
+    if [ -x "$b" ]
+    then
+      SHELL="$b"
+      break
+    fi
+  done
+  # if we get a report of a system with zsh but not bash, we can add that
+  # to the list, but be sure to enable sh_word_split in that case.
+
+  exec "$SHELL" "$0" "$@"
+fi
+

 input=lookups/Makefile.predynamic
 input=lookups/Makefile.predynamic

-target=lookups/Makefile
-defs_source=Makefile
+target=lookups/Makefile.postdynamic
+defs_source=Makefile-t

 tag_marker='MAGIC-TAG-MODS-OBJ-RULES-GO-HERE'
 
 tab='  '
 
 tag_marker='MAGIC-TAG-MODS-OBJ-RULES-GO-HERE'
 
 tab='  '
 

-# We always do something now, since there should always be a lookup,
-# and now we need to run in order to put the OBJ+= rules in.
+# We rely on tr(1) for translating case below.  Some people export
+# values of LC_CTYPE and LC_COLLATE which apparently break our assumptions.
+# We're a script expecting certain output based on known inputs and not dealing
+# with UTF8, so we should be safe doingthis:
+LC_ALL=C
+export LC_ALL

 
 

-if grep -q "^CFLAGS_DYNAMIC[ $tab]*=" "$defs_source"
+if [ -f "$defs_source" ]

 then
 then

-  # we have a definition, we're good to go
-  : # noop (true) statement for bash compatibility
+  :
+  # we are happy

 else
 else

-  echo >&2 "Missing CFLAGS_DYNAMIC inhibits building dynamic module lookup"
+  echo >&2 "$0: ERROR: MISSING FILE '${defs_source}'"
+  echo >&2 "$0: SHOULD HAVE BEEN CALLED FROM scripts/Configure-Makefile"

   exit 1
 fi
 
   exit 1
 fi
 

-tmp="$target.t"
+# nb: do not permit leading whitespace for this, as CFLAGS_DYNAMIC is exported
+# to the lookups subdir via a line with leading whitespace which otherwise
+# matches
+if grep -q "^CFLAGS_DYNAMIC[ $tab?:]*=" "$defs_source"
+then
+  # we have a definition, we're good to go
+  echo >&2 ">>> Creating lookups/Makefile for building dynamic modules"
+  enable_dynamic=yes
+else
+  echo >&2 ">>> Creating lookups/Makefile without dynamic module support"
+  enable_dynamic=''
+  # We always do something now, since there should always be a lookup,
+  # and now we need to run in order to put the OBJ=$(OBJ)+ rules in.  So we
+  # continue on.
+fi
+
+# For the want_ checks, we need to let the user override values from the make
+# command-line, not just check the Makefile.

 
 want_dynamic() {
   local dyn_name="$1"
 
 want_dynamic() {
   local dyn_name="$1"

-  grep -q "^LOOKUP_${dyn_name}[ $tab]*=[ $tab]*2" "$defs_source"
+  local re="LOOKUP_${dyn_name}[ $tab]*=[ $tab]*2"
+  env | grep -q "^$re"
+  if [ $? -eq 0 ]; then return 0; fi
+  grep -q "^[ $tab]*$re" "$defs_source"

 }
 
 want_at_all() {
   local want_name="$1"
 }
 
 want_at_all() {
   local want_name="$1"

-  grep -q "^LOOKUP_${want_name}[ $tab]*=[ $tab]*." "$defs_source"
+  local re="LOOKUP_${want_name}[ $tab]*=[ $tab]*."
+  env | grep -q "^$re"
+  if [ $? -eq 0 ]; then return 0; fi
+  grep -q "^[ $tab]*$re" "$defs_source"
+}
+
+# Adapted want_at_all above to work for EXPERIMENTAL features
+want_experimental() {
+  local want_name="$1"
+  local re="EXPERIMENTAL_${want_name}[ $tab]*=[ $tab]*."
+  env | grep -q "^$re"
+  if [ $? -eq 0 ]; then return 0; fi
+  grep -q "^[ $tab]*$re" "$defs_source"

 }
 
 }
 

+# The values of these variables will be emitted into the Makefile.
+
+MODS=""
+OBJ=""
+

 emit_module_rule() {
   local lookup_name="$1"
 emit_module_rule() {
   local lookup_name="$1"

-  local mod_name
+  local mod_name pkgconf

   if [ "${lookup_name%:*}" = "$lookup_name" ]
   then
   if [ "${lookup_name%:*}" = "$lookup_name" ]
   then

-    mod_name=$(echo $lookup_name | tr A-Z a-z)
+    # Square brackets are redundant but benign for POSIX compliant tr,
+    # however Solaris /usr/bin/tr requires them. Sometimes Solaris
+    # gets installed without a complete set of xpg4 tools, sigh.
+    mod_name=$(echo $lookup_name | tr [A-Z] [a-z])

   else
     mod_name="${lookup_name#*:}"
     lookup_name="${lookup_name%:*}"
   else
     mod_name="${lookup_name#*:}"
     lookup_name="${lookup_name%:*}"


@@ -46,37 +132,58 @@ emit_module_rule() {
 
   if want_dynamic "$lookup_name"
   then
 
   if want_dynamic "$lookup_name"
   then

-    echo "MODS += ${mod_name}.so"
-    grep "^LOOKUP_${lookup_name}_" "$defs_source"
-    echo "LOOKUP_${mod_name}_INCLUDE = \$(LOOKUP_${lookup_name}_INCLUDE)"
-    echo "LOOKUP_${mod_name}_LIBS = \$(LOOKUP_${lookup_name}_LIBS)"
+    if [ -z "$enable_dynamic" ]; then
+      echo >&2 "Missing CFLAGS_DYNAMIC prevents building dynamic $lookup_name"
+      exit 1
+    fi
+    MODS="${MODS} ${mod_name}.so"
+    pkgconf=$(grep "^LOOKUP_${lookup_name}_PC" "$defs_source")
+    if [ $? -eq 0 ]; then
+      pkgconf=$(echo $pkgconf | sed 's/^.*= *//')
+      echo "LOOKUP_${mod_name}_INCLUDE = $(pkg-config --cflags $pkgconf)"
+      echo "LOOKUP_${mod_name}_LIBS = $(pkg-config --libs $pkgconf)"
+    else
+      grep "^LOOKUP_${lookup_name}_" "$defs_source"
+      echo "LOOKUP_${mod_name}_INCLUDE = \$(LOOKUP_${lookup_name}_INCLUDE)"
+      echo "LOOKUP_${mod_name}_LIBS = \$(LOOKUP_${lookup_name}_LIBS)"
+    fi

   elif want_at_all "$lookup_name"
   then
   elif want_at_all "$lookup_name"
   then

-    echo "OBJ += ${mod_name}.o"
+    OBJ="${OBJ} ${mod_name}.o"

   fi
 }
 
   fi
 }
 

+rm -f "$target"

 exec 5>&1
 exec 5>&1

-exec > "$tmp"
+exec > "$target"

 
 sed -n "1,/$tag_marker/p" < "$input"
 
 for name_mod in \
     CDB DBM:dbmdb DNSDB DSEARCH IBASE LSEARCH MYSQL NIS NISPLUS ORACLE \
 
 sed -n "1,/$tag_marker/p" < "$input"
 
 for name_mod in \
     CDB DBM:dbmdb DNSDB DSEARCH IBASE LSEARCH MYSQL NIS NISPLUS ORACLE \

-    PASSWD PGSQL SQLITE TESTDB WHOSON
+    PASSWD PGSQL REDIS SQLITE TESTDB WHOSON

 do
   emit_module_rule $name_mod
 done
 
 if want_at_all LDAP
 then
 do
   emit_module_rule $name_mod
 done
 
 if want_at_all LDAP
 then

-  echo "OBJ += ldap.o"
+  OBJ="${OBJ} ldap.o"

 fi
 
 fi
 

+# Because the variable is EXPERIMENTAL_SPF and not LOOKUP_SPF we
+# always include spf.o and compile a dummy if EXPERIMENTAL_SPF is not
+# defined.
+
+OBJ="${OBJ} spf.o"
+
+echo "MODS = $MODS"
+echo "OBJ = $OBJ"
+

 sed -n "/$tag_marker/,\$p" < "$input"
 
 exec >&5
 sed -n "/$tag_marker/,\$p" < "$input"
 
 exec >&5

-mv "$tmp" "$target"

 
 

+# Configure-Makefile will move $target into place

 
 # vim: set ft=sh sw=2 :
 
 # vim: set ft=sh sw=2 :