Examples on why ungrafting is necessary

[zimoun]

Hi,

Updating the package r-chemminer, it leads to this huge stack of
grafts.  To be concrete, it is 84 grafts for a “simple” R packages.  On
my machine, the grafting steps are longer than building (compiling and R
dance).

We definitively need a way to tackle this.  Maybe when is in frozen
state, we could spend 2-5 days to tackle as much as graft that we can.

The previous Leo’s initiative is really worth and maybe we should have a
hackathon or something because my feeling is that more grafts are added
than removed.


Cheers,
simon


--8<---------------cut here---------------start------------->8---
applying 1 graft for /gnu/store/…-dbus-1.12.16.drv ...
grafting '/gnu/store/…-dbus-1.12.16' -> '/gnu/store/…-dbus-1.12.16'...
successfully built /gnu/store/…-dbus-1.12.16.drv
applying 1 graft for /gnu/store/…-cyrus-sasl-2.1.27.drv ...
grafting '/gnu/store/…-cyrus-sasl-2.1.27' -> '/gnu/store/…-cyrus-sasl-2.1.27'...
successfully built /gnu/store/…-cyrus-sasl-2.1.27.drv
applying 1 graft for /gnu/store/…-libxrender-0.9.10.drv ...
grafting '/gnu/store/…-libxrender-0.9.10' -> '/gnu/store/…-libxrender-0.9.10'...
successfully built /gnu/store/…-libxrender-0.9.10.drv
applying 1 graft for /gnu/store/…-libxt-1.2.0.drv ...
grafting '/gnu/store/…-libxt-1.2.0' -> '/gnu/store/…-libxt-1.2.0'...
successfully built /gnu/store/…-libxt-1.2.0.drv
applying 2 grafts for /gnu/store/…-libxft-2.3.3.drv ...
grafting '/gnu/store/…-libxft-2.3.3' -> '/gnu/store/…-libxft-2.3.3'...
successfully built /gnu/store/…-libxft-2.3.3.drv
applying 3 grafts for /gnu/store/…-libxmu-1.1.3.drv ...
grafting '/gnu/store/…-libxmu-1.1.3' -> '/gnu/store/…-libxmu-1.1.3'...
successfully built /gnu/store/…-libxmu-1.1.3.drv
applying 3 grafts for /gnu/store/…-libxpm-3.5.13.drv ...
grafting '/gnu/store/…-libxpm-3.5.13' -> '/gnu/store/…-libxpm-3.5.13'...
successfully built /gnu/store/…-libxpm-3.5.13.drv
applying 2 grafts for /gnu/store/…-openjpeg-2.3.1.drv ...
grafting '/gnu/store/…-openjpeg-2.3.1' -> '/gnu/store/…-openjpeg-2.3.1'...
successfully built /gnu/store/…-openjpeg-2.3.1.drv
applying 5 grafts for /gnu/store/…-libxaw-1.0.13.drv ...
grafting '/gnu/store/…-libxaw-1.0.13' -> '/gnu/store/…-libxaw-1.0.13'...
successfully built /gnu/store/…-libxaw-1.0.13.drv
applying 1 graft for /gnu/store/…-openldap-2.4.57.drv ...
grafting '/gnu/store/…-openldap-2.4.57' -> '/gnu/store/…-openldap-2.4.57'...
successfully built /gnu/store/…-openldap-2.4.57.drv
applying 1 graft for /gnu/store/…-ruby-2.6.5.drv ...
grafting '/gnu/store/…-ruby-2.6.5' -> '/gnu/store/…-ruby-2.6.5'...
successfully built /gnu/store/…-ruby-2.6.5.drv
applying 2 grafts for /gnu/store/…-curl-7.74.0.drv ...
grafting '/gnu/store/…-curl-7.74.0' -> '/gnu/store/…-curl-7.74.0'...
successfully built /gnu/store/…-curl-7.74.0.drv
applying 2 grafts for /gnu/store/…-tk-8.6.10.drv ...
grafting '/gnu/store/…-tk-8.6.10' -> '/gnu/store/…-tk-8.6.10'...
successfully built /gnu/store/…-tk-8.6.10.drv
applying 3 grafts for /gnu/store/…-python-3.8.2.drv ...
grafting '/gnu/store/…-python-3.8.2' -> '/gnu/store/…-python-3.8.2'...
grafting '/gnu/store/…-python-3.8.2-tk' -> '/gnu/store/…-python-3.8.2-tk'...
successfully built /gnu/store/…-python-3.8.2.drv
applying 3 grafts for /gnu/store/…-python2-2.7.17.drv ...
grafting '/gnu/store/…-python2-2.7.17' -> '/gnu/store/…-python2-2.7.17'...
grafting '/gnu/store/…-python2-2.7.17-tk' -> '/gnu/store/…-python2-2.7.17-tk'...
successfully built /gnu/store/…-python2-2.7.17.drv
applying 2 grafts for /gnu/store/…-glib-2.62.6.drv ...
grafting '/gnu/store/…-glib-2.62.6-bin' -> '/gnu/store/…-glib-2.62.6-bin'...
grafting '/gnu/store/…-glib-2.62.6' -> '/gnu/store/…-glib-2.62.6'...
successfully built /gnu/store/…-glib-2.62.6.drv
applying 4 grafts for /gnu/store/…-cairo-1.16.0.drv ...
grafting '/gnu/store/…-cairo-1.16.0' -> '/gnu/store/…-cairo-1.16.0'...
successfully built /gnu/store/…-cairo-1.16.0.drv
applying 4 grafts for /gnu/store/…-cairo-1.16.0.drv ...
grafting '/gnu/store/…-cairo-1.16.0' -> '/gnu/store/…-cairo-1.16.0'...
successfully built /gnu/store/…-cairo-1.16.0.drv
applying 1 graft for /gnu/store/…-harfbuzz-2.6.4.drv ...
grafting '/gnu/store/…-harfbuzz-2.6.4' -> '/gnu/store/…-harfbuzz-2.6.4'...
successfully built /gnu/store/…-harfbuzz-2.6.4.drv
applying 5 grafts for /gnu/store/…-poppler-0.86.1.drv ...
grafting '/gnu/store/…-poppler-0.86.1' -> '/gnu/store/…-poppler-0.86.1'...
successfully built /gnu/store/…-poppler-0.86.1.drv
applying 6 grafts for /gnu/store/…-pango-1.44.7.drv ...
grafting '/gnu/store/…-pango-1.44.7' -> '/gnu/store/…-pango-1.44.7'...
successfully built /gnu/store/…-pango-1.44.7.drv
applying 13 grafts for /gnu/store/…-texlive-bin-20190410.drv ...
grafting '/gnu/store/…-texlive-bin-20190410' -> 
'/gnu/store/…-texlive-bin-20190410'...
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
GC Warning: Repeated allocation of very large block (appr. size 1052672):
        May lead to memory leak and poor performance
successfully built /gnu/store/…-texlive-bin-20190410.drv
applying 1 graft for /gnu/store/…-texlive-union-51265.drv ...
grafting '/gnu/store/…-texlive-union-51265' -> 
'/gnu/store/…-texlive-union-51265'...
successfully built /gnu/store/…-texlive-union-51265.drv
applying 14 grafts for /gnu/store/…-r-minimal-4.0.4.drv ...
grafting '/gnu/store/…-r-minimal-4.0.4' -> '/gnu/store/…-r-minimal-4.0.4'...
successfully built /gnu/store/…-r-minimal-4.0.4.drv
applying 1 graft for /gnu/store/…-r-rcpp-1.0.6.drv ...
grafting '/gnu/store/…-r-rcpp-1.0.6' -> '/gnu/store/…-r-rcpp-1.0.6'...
successfully built /gnu/store/…-r-rcpp-1.0.6.drv
applying 2 grafts for /gnu/store/…-r-chemminer-3.42.2.drv ...
grafting '/gnu/store/…-r-chemminer-3.42.2' -> 
'/gnu/store/…-r-chemminer-3.42.2'...
successfully built /gnu/store/…-r-chemminer-3.42.2.drv
/gnu/store/…-r-chemminer-3.42.2
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