Add cygwin-release test target.

This also moves the cygwin package install from the workflow file to
setup_ci.sh so that we can install different sets of Cygwin packages
for different test configs.

.github/configs

@@ -34,7 +34,9 @@ case "$config" in
 	TEST_TARGET=t-exec
 	;;
     cygwin-release)
-	CONFIGFLAGS="--with-libedit --with-xauth=/usr/bin/xauth --disable-strip --with-security-key-builtin"
+	# See https://cygwin.com/git/?p=git/cygwin-packages/openssh.git;a=blob;f=openssh.cygport;hb=HEAD
+	CONFIGFLAGS="--with-xauth=/usr/bin/xauth --with-security-key-builtin"
+	CONFIGFLAGS="$CONFIGFLAGS --with-kerberos5=/usr --with-libedit --disable-strip"
 	;;
    clang-12-Werror)
 	CC="clang-12"

.github/setup_ci.sh

@@ -1,26 +1,30 @@
 #!/bin/sh
 
+PACKAGES=""
+
  . .github/configs $@
 
 case "`./config.guess`" in
 *cygwin)
-	set -x
+	PACKAGER=setup
 	echo Setting CYGWIN sustem environment variable.
 	setx CYGWIN "binmode"
-	id
 	chmod -R go-rw /cygdrive/d/a
 	umask 077
-	set +x
+	PACKAGES="$PACKAGES,autoconf,automake,cygwin-devel,gcc-core"
+	PACKAGES="$PACKAGES,make,openssl-devel,zlib-devel"
 	;;
 *-darwin*)
+	PACKAGER=brew
 	brew install automake
 	exit 0
 	;;
+*)
+	PACKAGER=apt
 esac
 
 TARGETS=$@
 
-PACKAGES=""
 INSTALL_FIDO_PPA="no"
 export DEBIAN_FRONTEND=noninteractive
 
@@ -46,19 +50,22 @@ fi
 
 for flag in $CONFIGFLAGS; do
     case "$flag" in
-    --with-pam)		PACKAGES="${PACKAGES} libpam0g-dev" ;;
-    --with-libedit)	PACKAGES="${PACKAGES} libedit-dev" ;;
+    --with-pam)		TARGETS="${TARGETS} pam" ;;
+    --with-libedit)	TARGETS="${TARGETS} libedit" ;;
     esac
 done
 
 for TARGET in $TARGETS; do
     case $TARGET in
-    default|without-openssl|without-zlib|c89|libedit|*pam)
+    default|without-openssl|without-zlib|c89)
         # nothing to do
         ;;
     clang-sanitize*)
         PACKAGES="$PACKAGES clang-12"
         ;;
+    cygwin-release)
+        PACKAGES="$PACKAGES libfido2-devel libkrb5-devel"
+        ;;
     gcc-sanitize*)
         ;;
     clang-*|gcc-*)
@@ -71,6 +78,15 @@ for TARGET in $TARGETS; do
     heimdal)
         PACKAGES="$PACKAGES heimdal-dev"
         ;;
+    libedit)
+	case "$PACKAGER" in
+	setup)	PACKAGES="$PACKAGES libedit-devel" ;;
+	apt)	PACKAGES="$PACKAGES libedit-dev" ;;
+	esac
+        ;;
+    *pam)
+        PACKAGES="$PACKAGES libpam0g-dev"
+        ;;
     sk)
         INSTALL_FIDO_PPA="yes"
         PACKAGES="$PACKAGES libfido2-dev libu2f-host-dev libcbor-dev"
@@ -123,9 +139,16 @@ if [ "yes" = "$INSTALL_FIDO_PPA" ]; then
     sudo apt-add-repository -y ppa:yubico/stable
 fi
 
-if [ "x" != "x$PACKAGES" ]; then 
-    sudo apt update -qq
-    sudo apt install -qy $PACKAGES
+if [ "x" != "x$PACKAGES" ]; then
+    case "$PACKAGER" in
+    apt)
+	sudo apt update -qq
+	sudo apt install -qy $PACKAGES
+	;;
+    setup)
+	/cygdrive/c/setup.exe -q -P `echo "$PACKAGES" | tr ' ' ,`
+	;;
+    esac
 fi
 
 if [ "${INSTALL_HARDENED_MALLOC}" = "yes" ]; then

.github/workflows/c-cpp.yml

@@ -20,6 +20,7 @@ jobs:
         # Then we include any extra configs we want to test for specific VMs.
         # Valgrind slows things down quite a bit, so start them first.
         include:
+          - { os: windows-2019, configs: cygwin-release }
           - { os: ubuntu-20.04, configs: valgrind-1 }
           - { os: ubuntu-20.04, configs: valgrind-2 }
           - { os: ubuntu-20.04, configs: valgrind-3 }
@@ -85,8 +86,6 @@ jobs:
     - name: install cygwin
       if: ${{ matrix.os == 'windows-2019' }}
       uses: cygwin/cygwin-install-action@master
-      with:
-        packages: autoconf, automake, cygwin-devel, gcc-core, make, openssl-devel, zlib-devel
     - uses: actions/checkout@v2
     - name: setup CI system
       run: sh ./.github/setup_ci.sh ${{ matrix.configs }}