Merge download-only-option into capture-build-w...

Author: Damian Rouson

install.sh-usage

@@ -1,11 +1,11 @@
   -b --install-branch [arg]   Install the specified repository development branch.
   -B --list-branches [arg]    List the available branches in the specified package's repository.
-  -c --with-c [arg]           Use specified C compiler. 
-  -C --with-cxx [arg]         Use specified C++ compiler. 
+  -c --with-c [arg]           Use specified C compiler.
+  -C --with-cxx [arg]         Use specified C++ compiler.
   -d --debug                  Enable debug mode.
   -D --print-downloader [arg] Print download program for package specified in argument.
   -e --verbose                Enable verbose mode, print script as it is executed.
-  -f --with-fortran [arg]     Use specified Fortran compiler. 
+  -f --with-fortran [arg]     Use specified Fortran compiler.
   -h --help                   Print this page.
   -i --install-prefix [arg]   Install package in specified path. Default="${OPENCOARRAYS_SRC_DIR}/prerequisites/installations/${package_name:-}/${version_to_build:-}"
   -I --install-version [arg]  Install package version.
@@ -14,6 +14,7 @@
   -m --with-cmake [arg]       Use specified CMake installation. Default="cmake"
   -M --with-mpi [arg]         Use specified MPI installation.
   -n --no-color               Disable color output.
+  -o --only-download          Download (without building) the source for the package specified by -p or --package.
   -p --package [arg]          Install specified package. Default="opencoarrays"
   -P --print-path [arg]       Print installation directory for specified package.
   -U --print-url [arg]        Print download location for specified package.

prerequisites/build.sh

@@ -141,6 +141,12 @@ fi
 source "${OPENCOARRAYS_SRC_DIR:-}/prerequisites/build-functions/download_if_necessary.sh"
 download_if_necessary
 
+# Exit if -o or --only-download was specified when invoking this script
+if [[ ${arg_o:-} == "${__flag_present}" ]]; then
+   info "No installation to perform: -o or --only-download specified.  Exiting."
+   exit 0
+fi
+
 if [[ -z "${arg_B}" ]]; then
   # shellcheck source=./build-functions/unpack_if_necessary.sh
   source "${OPENCOARRAYS_SRC_DIR:-}/prerequisites/build-functions/unpack_if_necessary.sh"

prerequisites/build.sh-usage

@@ -14,6 +14,7 @@
   -m --with-cmake [arg]       Use the specified CMake installation. Default="cmake"
   -M --with-mpi [arg]         Use the specified MPI installation. 
   -n --no-color               Disable color output.
+  -o --only-download          Download (without building) the package source specified by -p or --package.
   -p --package [arg]          Package to install. 
   -P --print-path [arg]       Print installation path for package specified in argument.
   -t --with-tau [arg]         Use the specified TAU parallel performance utilities installation. Default="tauf90"