Add RISC-V Architecture

[tri-adam]

Add riscv64 architecture to archType mapping functions. Add corresponding option to --partarch flag of add command.

Closes #181

[codecov-commenter]

Codecov Report

Merging #182 (474691f) into master (2378e6b) will decrease coverage by 0.04%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master     #182      +/-   ##
==========================================
- Coverage   76.51%   76.46%   -0.05%     
==========================================
  Files          28       28              
  Lines        2499     2503       +4     
==========================================
+ Hits         1912     1914       +2     
- Misses        448      450       +2     
  Partials      139      139              

Impacted Files	Coverage Δ
pkg/siftool/add.go	52.90% <33.33%> (-0.63%)	⬇️
pkg/sif/arch.go	100.00% <100.00%> (ø)

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[dtrudg]

LGTM - will leave it unmerged for a bit pending feedback? I can try with qemu later this week, or early next week if needed.

[tri-adam]

LGTM - will leave it unmerged for a bit pending feedback? I can try with qemu later this week, or early next week if needed.

I think that's wise, yeah.

[jorgee]

I tested this branch with the 3.9.5 released in an RISC-V 64bits Unmatched board with ubuntu linux and it is working. Still appearing a message "Architecture not recognized, use native" but not failing as before.

Steps I have done

1.- cloned repo tri-adam:riscv64 in /home/myuser/sif-riscv64
2.- download and untar singularity-3.9.5.tar.gz
3.- in singularity-3.9.5/go.mod add "replace github.com/sylabs/sif/v2 => /home/myuser/sif-riscv64"
4.- go mod tidy
5.- go mod vendor
6.- Install singularity ./mconfig ...

[dtrudg]

"Architecture not recognized, use native"

... is related to SingularityCE's code, not SIF. Opened sylabs/singularity#628 to track that once an updated SIF is pulled into SingularityCE.

[dtrudg]

Confirmed 🎉