Lack of documentation about Rust for compiling the extension

[emanzx]

As freeBSD does not support any docker system apart from setting up VM and installing linux and installing docker in the linux I was compiling timescale-prometheus manually my last version is the 0.1.0-alpha.4 and the timescale_prometheus_extra was successfully compiled using gmake, today I update the version to 0.1.0-beta.4 and successfully compiled the timescale-prometheus but when I try to compiled and install the latest timescale_prometheus_extra I get the error as below: -

root@dnsvgitnpm:~/install/timescale-prometheus/extension # gmake clean
Makefile:57: warning: overriding recipe for target 'clean'
/usr/local/lib/postgresql/pgxs/src/makefiles/pgxs.mk:355: warning: ignoring old recipe for target 'clean'
rm -f timescale_prometheus_extra.so   libtimescale_prometheus_extra.a  libtimescale_prometheus_extra.pc
rm -f src/support.o src/support.bc
rm -f timescale_prometheus_extra.so
cargo clean
gmake: cargo: No such file or directory
gmake: *** [Makefile:59: clean] Error 127
root@dnsvgitnpm:~/install/timescale-prometheus/extension # gmake
Makefile:57: warning: overriding recipe for target 'clean'
/usr/local/lib/postgresql/pgxs/src/makefiles/pgxs.mk:355: warning: ignoring old recipe for target 'clean'
cc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Werror=vla -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -Wno-unused-command-line-argument -O2 -pipe  -fstack-protector-strong -fno-strict-aliasing  -fPIC -DPIC -DINCLUDE_PACKAGE_SUPPORT=0 -MMD -I. -I./ -I/usr/local/include/postgresql/server -I/usr/local/include/postgresql/internal  -I/usr/local/include -I/usr/local/include -I/usr/local/include  -c -o src/support.o src/support.c
cargo build --release 
gmake: cargo: No such file or directory
gmake: *** [Makefile:54: target/release/libtimescale_prometheus_extra_rs.a] Error 127
root@dnsvgitnpm:~/install/timescale-prometheus/extension # gmake install
Makefile:57: warning: overriding recipe for target 'clean'
/usr/local/lib/postgresql/pgxs/src/makefiles/pgxs.mk:355: warning: ignoring old recipe for target 'clean'
cargo build --release 
gmake: cargo: No such file or directory
gmake: *** [Makefile:54: target/release/libtimescale_prometheus_extra_rs.a] Error 127

any Idea what could be the problem.
from my poor skill in compiling things I can see that cargo cannot find some file..

gmake: cargo: No such file or directory

but does not mentioned what file

[cevian]

Yes, this is a Rust thing. You need to install Rust to compile the extension. We need to update the documentation.

https://www.rust-lang.org/tools/install

[cevian]

@JLockerman please add documentation for installing Rust