The open source OpenXR runtime
build: Fix installing active_runtime.json on meson without DESTDIR
The -u setting for bash reported an error if DESTDIR is not set.
The syntax ${A-foo} returns the content of A if set, or the default "foo" if not,
"foo" being the empty string in this case.
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src/xrt/targets/openxr/install_active_runtime.sh
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src/xrt/targets/openxr/install_active_runtime.sh
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#
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# Used by the Meson build only.
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sysconfdir="$DESTDIR"/"$1"
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sysconfdir="${DESTDIR-}"/"$1"
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manifest="$2"
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xrversion="$3"
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runtime_path="$sysconfdir"/xdg/openxr/"$xrversion"/active_runtime.json
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mkdir -p "$sysconfdir"/xdg/openxr/"$xrversion"
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ln -s "$manifest" "$runtime_path"
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ln -sf "$manifest" "$runtime_path"