fix: evaluate only globals already known

[mariux]

• detect unknown namespaces
• detect unknown variables in global namespace
• fix evaluation order
• detect global variables that could not be evaluated (cycles)
• set new context in each loop execution

[codecov-commenter]

Codecov Report

Merging #136 (df1430e) into main (0012dde) will decrease coverage by 0.49%.
The diff coverage is 62.06%.

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
- Coverage   74.29%   73.79%   -0.50%     
==========================================
  Files          29       29              
  Lines        3077     3103      +26     
==========================================
+ Hits         2286     2290       +4     
- Misses        593      609      +16     
- Partials      198      204       +6     

Flag	Coverage Δ
tests	73.79% <62.06%> (-0.50%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
globals.go	79.41% <59.25%> (-12.56%)	⬇️
hcl/eval/eval.go	82.85% <100.00%> (+1.03%)	⬆️
manager.go	50.51% <0.00%> (-0.52%)	⬇️
git/git.go	65.89% <0.00%> (-0.52%)	⬇️

---

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[katcipis]

Tested with:

#!/bin/bash

set -o errexit
set -o nounset

basedir=$(mktemp -d)

cd "${basedir}"

cat > terramate.tm.hcl <<- EOM
terramate {
  config {
  }
}
EOM

mkdir -p dir/stack

cat > dir/stack/terramate.tm.hcl <<- EOM
globals {
  team = {
    members = ["aaa"]
  }
  members = global.team.members
  members_try = try(global.team.members, [])
}

export_as_locals {
  members = global.members
  members_try = global.members_try
}

stack {}
EOM

terramate generate

echo
echo "generated code"
cat dir/stack/_gen_locals.tm.tf

echo
echo "listing globals"
terramate stacks globals

And it seems to be working now, thanks 💯