{ci,cirrusci}.sh: Use HOST_DMD, and set HOST_DC as an override

This will allow to silence some deprecation message triggered in the Makefiles.
Later on, when other repositories have been migrated, we can remove support for HOST_DC.

.cirrus.yml

@@ -14,7 +14,7 @@ environment:
   CIRRUS_CLONE_DEPTH: 50
   # for ci.sh:
   MODEL: 64
-  HOST_DC: dmd
+  HOST_DMD: dmd
   N: 4
   OS_NAME: linux
   FULL_BUILD: true
@@ -33,14 +33,14 @@ task:
         MODEL: 32
       - TASK_NAME_SUFFIX: x86, DMD (bootstrap)
         MODEL: 32
-        HOST_DC: dmd-2.079.0
+        HOST_DMD: dmd-2.079.0
       - TASK_NAME_SUFFIX: x64, DMD (latest)
       - TASK_NAME_SUFFIX: x64, DMD (bootstrap)
-        HOST_DC: dmd-2.079.0
+        HOST_DMD: dmd-2.079.0
       - TASK_NAME_SUFFIX: x64, LDC
-        HOST_DC: ldc
+        HOST_DC: ldc #TODO: Update to HOST_DMD when support for HOST_DC is removed
       - TASK_NAME_SUFFIX: x64, GDC
-        HOST_DC: gdmd-9
+        HOST_DMD: gdmd-9
   << : *COMMON_STEPS_TEMPLATE
 
 # Mac
@@ -58,7 +58,7 @@ task:
       - TASK_NAME_SUFFIX: DMD (bootstrap)
         # de-facto bootstrap version on OSX
         # See: https://forum.dlang.org/post/qfsgt2$1goc$1@digitalmars.com
-        HOST_DC: dmd-2.088.0
+        HOST_DMD: dmd-2.088.0
   << : *COMMON_STEPS_TEMPLATE
 
 # FreeBSD
@@ -84,7 +84,7 @@ task:
   timeout_in: 60m
   environment:
     OS_NAME: freebsd
-    HOST_DC: dmd-2.079.0
+    HOST_DMD: dmd-2.079.0
     CI_DFLAGS: -version=TARGET_FREEBSD11
   install_bash_script: pkg install -y bash
   << : *COMMON_STEPS_TEMPLATE

ci.sh

@@ -13,8 +13,9 @@ if [ -z ${OS_NAME+x} ] ; then echo "Variable 'OS_NAME' needs to be set."; exit 1
 if [ -z ${FULL_BUILD+x} ] ; then echo "Variable 'FULL_BUILD' needs to be set."; exit 1; fi
 # MODEL: 32|64
 if [ -z ${MODEL+x} ] ; then echo "Variable 'MODEL' needs to be set."; exit 1; fi
-# HOST_DC: dmd[-<version>]|ldc[-<version>]|gdmd-<version>
-if [ -z ${HOST_DC+x} ] ; then echo "Variable 'HOST_DC' needs to be set."; exit 1; fi
+# HOST_DMD: dmd[-<version>]|ldc[-<version>]|gdmd-<version>
+if [ ! -z ${HOST_DC+x} ] ; then HOST_DMD=${HOST_DC}; fi
+if [ -z ${HOST_DMD+x} ] ; then echo "Variable 'HOST_DMD' needs to be set."; exit 1; fi
 # CI_DFLAGS: Optional flags to pass to the build
 if [ -z ${CI_DFLAGS+x} ] ; then CI_DFLAGS=""; fi
 
@@ -185,8 +186,8 @@ download_install_sh() {
 
 # install D host compiler
 install_host_compiler() {
-  if [ "${HOST_DC:0:5}" == "gdmd-" ] ; then
-    local gdc_version="${HOST_DC:5}"
+  if [ "${HOST_DMD:0:5}" == "gdmd-" ] ; then
+    local gdc_version="${HOST_DMD:5}"
     if [ ! -e ~/dlang/gdc-$gdc_version/activate ] ; then
         sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
         sudo apt-get update
@@ -202,7 +203,7 @@ install_host_compiler() {
   else
     local install_sh="install.sh"
     download_install_sh "$install_sh"
-    CURL_USER_AGENT="$CURL_USER_AGENT" bash "$install_sh" "$HOST_DC"
+    CURL_USER_AGENT="$CURL_USER_AGENT" bash "$install_sh" "$HOST_DMD"
   fi
 }
 

cirrusci.sh

@@ -10,8 +10,9 @@ set -uexo pipefail
 if [ -z ${OS_NAME+x} ] ; then echo "Variable 'OS_NAME' needs to be set."; exit 1; fi
 # MODEL: 32|64
 if [ -z ${MODEL+x} ] ; then echo "Variable 'MODEL' needs to be set."; exit 1; fi
-# HOST_DC: dmd[-<version>]|ldc[-<version>]|gdmd-<version>
-if [ -z ${HOST_DC+x} ] ; then echo "Variable 'HOST_DC' needs to be set."; exit 1; fi
+# HOST_DMD: dmd[-<version>]|ldc[-<version>]|gdmd-<version>
+if [ ! -z ${HOST_DC+x} ] ; then HOST_DMD=${HOST_DC}; fi
+if [ -z ${HOST_DMD+x} ] ; then echo "Variable 'HOST_DMD' needs to be set."; exit 1; fi
 
 if [ "$OS_NAME" == "linux" ]; then
   packages="git-core make g++ gdb curl libcurl3 tzdata zip unzip xz-utils"
@@ -19,7 +20,7 @@ if [ "$OS_NAME" == "linux" ]; then
     dpkg --add-architecture i386
     packages="$packages g++-multilib libcurl3-gnutls:i386"
   fi
-  if [ "${HOST_DC:0:4}" == "gdmd" ]; then
+  if [ "${HOST_DMD:0:4}" == "gdmd" ]; then
     # ci.sh uses `sudo add-apt-repository ...` to add a PPA repo
     packages="$packages sudo software-properties-common"
   fi
@@ -30,7 +31,7 @@ elif [ "$OS_NAME" == "darwin" ]; then
   brew install gnupg
 elif [ "$OS_NAME" == "freebsd" ]; then
   packages="git gmake"
-  if [ "$HOST_DC" == "dmd-2.079.0" ] ; then
+  if [ "$HOST_DMD" == "dmd-2.079.0" ] ; then
     packages="$packages lang/gcc9"
   fi
   pkg install -y $packages