From 8e7deb76ef61143714c96be71b9c47902de69e61 Mon Sep 17 00:00:00 2001
From: Joseph Wayne Norton <norton@alum.mit.edu>
Date: Wed, 23 Oct 2013 22:32:32 -0500
Subject: Add support for disabling apps to build via
 KERL_CONFIGURE_DISABLE_APPLICATIONS

If non-empty, you can specify the subset of applications to disable when
building (and subsequent installing) Erlang/OTOP with the
KERL_CONFIGURE_DISABLE_APPLICATIONS variable, either in your $HOME/.kerlrc
file or prepending it to the command line.

e.g. KERL_CONFIGURE_DISABLE_APPLICATIONS="odbc"
---
 README.md |  7 +++++++
 kerl      | 25 +++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/README.md b/README.md
index cac2608..833d4ff 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,7 @@ You can set the following variables:
 - KERL_DEFAULT_INSTALL_DIR if set in ~/.kerlrc, install builds to this dir if no path is provided on installs, (recommend "$KERL_BASE_DIR/installs")
 - KERL_CONFIGURE_OPTIONS options to pass to Erlang's ./configure script, e.g. --without-termcap
 - KERL_CONFIGURE_APPLICATIONS if non-empty, subset of applications used in the builds (and subsequent installations) process, e.g. "kernel stdlib sasl"
+- KERL_CONFIGURE_DISABLE_APPLICATIONS if non-empty, subset of applications disabled in the builds (and subsequent installations) process, e.g. "odbc"
 - KERL_SASL_STARTUP use SASL system startup instead of minimal
 - KERL_USE_AUTOCONF use autoconf in the builds process
 - KERL_INSTALL_MANPAGES if non-empty will install manpages
@@ -204,6 +205,12 @@ If non-empty, you can specify the subset of applications to use when building (a
 
     $ KERL_CONFIGURE_APPLICATIONS="kernel stdlib sasl" kerl build R15B01 r15b01_minimal
 
+#### Configure disable applications
+
+If non-empty, you can specify the subset of applications to disable when building (and subsequent installing) Erlang/OTOP with the KERL_CONFIGURE_DISABLE_APPLICATIONS variable, either in your $HOME/.kerlrc file or prepending it to the command line.
+
+    $ KERL_CONFIGURE_DISABLE_APPLICATIONS="odbc" kerl build R16B02 r16b02_no_odbc
+
 #### Enable autoconf
 
 You can enable the use of autoconf in the build process setting KERL_USE_AUTOCONF=yes in your $HOME/.kerlrc file
diff --git a/kerl b/kerl
index 7af030f..2560571 100755
--- a/kerl
+++ b/kerl
@@ -34,6 +34,9 @@ fi
 if [ -n "$KERL_CONFIGURE_APPLICATIONS" ]; then
     _KCA="$KERL_CONFIGURE_APPLICATIONS"
 fi
+if [ -n "$KERL_CONFIGURE_DISABLE_APPLICATIONS" ]; then
+    _KCDA="$KERL_CONFIGURE_DISABLE_APPLICATIONS"
+fi
 if [ -n "$KERL_SASL_STARTUP" ]; then
     _KSS="$KERL_SASL_STARTUP"
 fi
@@ -45,6 +48,7 @@ if [ -n "$KERL_DEPLOY_RSYNC_OPTIONS" ]; then
 fi
 KERL_CONFIGURE_OPTIONS=
 KERL_CONFIGURE_APPLICATIONS=
+KERL_CONFIGURE_DISABLE_APPLICATIONS=
 KERL_SASL_STARTUP=
 KERL_INSTALL_MANPAGES=
 
@@ -60,6 +64,9 @@ fi
 if [ -n "$_KCA" ]; then
     KERL_CONFIGURE_APPLICATIONS="$_KCA"
 fi
+if [ -n "$_KCDA" ]; then
+    KERL_CONFIGURE_DISABLE_APPLICATIONS="$_KCDA"
+fi
 if [ -n "$_KSS" ]; then
     KERL_SASL_STARTUP="$_KSS"
 fi
@@ -292,6 +299,15 @@ do_git_build()
             fi
         done
     fi
+    if [ -n "$KERL_CONFIGURE_DISABLE_APPLICATIONS" ]; then
+        for i in $KERL_CONFIGURE_DISABLE_APPLICATIONS; do
+            touch -f ./lib/$i/SKIP
+            if [ $? -ne 0 ]; then
+                echo "Couldn't disable '$i' application for building"
+                exit 1
+            fi
+        done
+    fi
     ./otp_build boot -a $KERL_CONFIGURE_OPTIONS > "$LOGFILE" 2>&1
     if [ $? -ne 0 ]; then
         echo "Build error, see $LOGFILE"
@@ -366,6 +382,15 @@ do_build()
             fi
         done
     fi
+    if [ -n "$KERL_CONFIGURE_DISABLE_APPLICATIONS" ]; then
+        for i in $KERL_CONFIGURE_DISABLE_APPLICATIONS; do
+            touch -f ./lib/$i/SKIP
+            if [ $? -ne 0 ]; then
+                echo "Couldn't disable '$i' application for building"
+                exit 1
+            fi
+        done
+    fi
     ./otp_build boot -a $KERL_CONFIGURE_OPTIONS > "$LOGFILE" 2>&1
     if [ $? -ne 0 ]; then
         echo "Build failed, see $LOGFILE"
-- 
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