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run.in: Add intelligent prepend function.
This has been used in libguestfs and libnbd for quite a while as it makes the ./run script easier to read and write. See also: http://stackoverflow.com/a/9631350 Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Reviewed-by: Erik Skultety <eskultet@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
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run.in
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run.in
@ -42,22 +42,20 @@
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#
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#
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#----------------------------------------------------------------------
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#----------------------------------------------------------------------
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# Function to intelligently prepend a path to an environment variable.
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# See http://stackoverflow.com/a/9631350
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prepend()
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{
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eval $1="$2\${$1:+:\$$1}"
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}
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# Find this script.
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# Find this script.
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b=@abs_builddir@
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b=@abs_builddir@
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library_path="$b/src/.libs"
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prepend LD_LIBRARY_PATH "$b/src/.libs"
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if [ -z "$LD_LIBRARY_PATH" ]; then
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LD_LIBRARY_PATH=$library_path
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else
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LD_LIBRARY_PATH="$library_path:$LD_LIBRARY_PATH"
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fi
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export LD_LIBRARY_PATH
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export LD_LIBRARY_PATH
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if [ -z "$PKG_CONFIG_PATH" ]; then
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prepend PKG_CONFIG_PATH "$b/src"
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PKG_CONFIG_PATH="$b/src"
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else
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PKG_CONFIG_PATH="$b/src:$PKG_CONFIG_PATH"
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fi
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export PKG_CONFIG_PATH
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export PKG_CONFIG_PATH
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# Ensure that any 3rd party apps using libvirt.so from the build tree get
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# Ensure that any 3rd party apps using libvirt.so from the build tree get
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