I use ubuntu 18.04.1
I've installed GIMP 2.10.6 using this PPA:
https://launchpad.net/~otto-kesselgulasch/+archive/ubuntu/gimp
I have tried to install beautify in several ways, using git and downloading the package but I came always with the same output... failed to make.

I download beautify from here... https://github.com/hejiann/beautify and I place it in my home folder, it is named beautify-master I open it into a terminal and try to make but although I have libgimp2.0-dev in its latest version,
"libgimp2.0 is already the newest version (2.10.6+om-0ubu18.04.2~ppa)".
I receive this output...

~/beautify-master$ make

gcc `gimptool-2.0 --cflags` -c beautify.c -o beautify.o

Package gegl-0.4 was not found in the pkg-config search path.

Perhaps you should add the directory containing `gegl-0.4.pc'

to the PKG_CONFIG_PATH environment variable

Package 'gegl-0.4', required by 'gimp-2.0', not found

No output from 'pkg-config --cflags gimpui-2.0'

beautify.c:18:10: fatal error: libgimp/gimp.h: No such file or directory

#include < libgimp/gimp.h>

^~~~~~~~~~~~~~~~ 



compilation terminated.

Makefile:77: recipe for target 'beautify.o' failed

make: *** [beautify.o] Error 1

I also have tried to move the folder to my gimp plugin folder and tried to install it but didn't worked at all

I hope someone could tell me what I am doing wrong...
Thanks in advance...