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myos/spec/unit/config_spec.sh
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Yann Autissier 55fae625d6 keep the dynamism of make in pure shell 
Two mechanisms, matching what the make engine actually did:

Lazy defaults. A stack setting is a function myos_default_<VAR>, called only
when the variable has no value, and called again at every reference. That is
exactly a recursive ?=: an explicit value wins, and the default follows a
DOMAIN that a .env changes later. The prefix is what makes it safe; the first
version used a bare function named after the variable, and the test suite
caught it running /usr/bin/host for a stack group called host.

Templates. myos env-update fills a .env from the .env.dist files, expanding
${VAR} against the current values and running $(command), forward references
included.

Also fixed: the project .env now wins over /etc/conf.d/myos, which is what the
documentation claimed and the code did not.

share/make/shim.mk lets a project keep make as a front end: every myos command
becomes a target that shells out to bin/myos, and the project keeps its own
targets and its stack .mk files. It sits outside make/ because the legacy
engine globs every .mk in there.
2026-09-03 20:46:28 +02:00

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#shellcheck shell=sh
Include lib/str.sh
Include lib/core.sh
Include lib/var.sh
Include lib/tags.sh
Include lib/config.sh
Describe 'lib/config.sh'
setup() { MYOS_TMP=$(mktemp -d "${TMPDIR:-/tmp}/myos-cfg.XXXXXX"); }
cleanup() { rm -rf "$MYOS_TMP"; }
BeforeEach setup
AfterEach cleanup
Describe 'myos_dotenv_parse'
It 'keeps plain assignments, drops comments and blanks, trims around the ='
printf '# a comment\n\nFOO=bar\n BAZ = qux \nnot an assignment\n' > "$MYOS_TMP/.env"
When call myos_dotenv_parse "$MYOS_TMP/.env"
The line 1 should equal "FOO=bar"
The line 2 should equal "BAZ=qux "
The lines of output should equal 2
End
It 'strips one layer of quotes'
printf 'A="quoted"\nB='"'"'single'"'"'\nC=bare\n' > "$MYOS_TMP/.env"
When call myos_dotenv_parse "$MYOS_TMP/.env"
The line 1 should equal "A=quoted"
The line 2 should equal "B=single"
The line 3 should equal "C=bare"
End
It 'keeps a value containing a hash, which the make include could not'
printf 'PASS=aa#bb\n' > "$MYOS_TMP/.env"
When call myos_dotenv_parse "$MYOS_TMP/.env"
The output should equal "PASS=aa#bb"
End
It 'never executes the file'
printf 'X=$(touch %s/pwned)\n' "$MYOS_TMP" > "$MYOS_TMP/.env"
When call myos_dotenv_parse "$MYOS_TMP/.env"
The output should equal 'X=$(touch '"$MYOS_TMP"'/pwned)'
The path "$MYOS_TMP/pwned" should not be exist
End
It 'is empty for a missing file'
When call myos_dotenv_parse "$MYOS_TMP/nope"
The output should equal ""
End
End
Describe 'myos_dotenv_load'
It 'sets the variables of the file'
printf 'LOADED=yes\n' > "$MYOS_TMP/.env"
When run source spec/unit/config_load_helper.sh "$MYOS_TMP/.env"
The output should equal "yes"
End
It 'never overrides a variable that already has a value'
printf 'LOADED=fromfile\n' > "$MYOS_TMP/.env"
When run source spec/unit/config_load_helper.sh "$MYOS_TMP/.env" preset
The output should equal "preset"
End
End
Describe 'myos_env_vars'
It 'collects the variables referenced by a compose file'
printf 'services:\n a:\n image: ${IMAGE}\n environment:\n X: ${FOO:-d}\n' > "$MYOS_TMP/c.yml"
When call myos_env_vars "$MYOS_TMP/c.yml"
The output should equal "FOO IMAGE"
End
It 'ignores the $$ compose escape'
printf 'services:\n a:\n command: echo $$HOME ${REAL}\n' > "$MYOS_TMP/c.yml"
When call myos_env_vars "$MYOS_TMP/c.yml"
The output should equal "REAL"
End
It 'is empty without files'
When call myos_env_vars
The output should equal ""
End
End
Describe 'myos_env_export'
It 'prints only the variables that have a value'
SET_ONE=x; SET_TWO=
When call myos_env_export SET_ONE SET_TWO SET_MISSING
The output should equal "SET_ONE=x"
End
End
End
Describe 'lib/config.sh robustness'
setup() { MYOS_TMP=$(mktemp -d "${TMPDIR:-/tmp}/myos-cfg.XXXXXX"); }
cleanup() { rm -rf "$MYOS_TMP"; }
BeforeEach setup
AfterEach cleanup
It 'loads an empty .env without complaining'
: > "$MYOS_TMP/.env"
When call myos_dotenv_load "$MYOS_TMP/.env"
The status should be success
The stderr should equal ""
End
It 'ignores a line with an empty key'
printf '=orphan\nGOOD=1\n' > "$MYOS_TMP/.env"
When call myos_dotenv_parse "$MYOS_TMP/.env"
The output should equal "GOOD=1"
End
It 'returns empty for an unnamed variable'
When call myos_var ""
The output should equal ""
The status should be success
End
End
# The make engine generated a .env out of a .env.dist, expanding ${VAR} against
# the current values and running $(cmd). These check the shell equivalent.
Describe 'lib/config.sh templates'
setup() { MYOS_TMP=$(mktemp -d "${TMPDIR:-/tmp}/myos-tpl.XXXXXX"); }
cleanup() { rm -rf "$MYOS_TMP"; }
BeforeEach setup
AfterEach cleanup
Describe 'myos_expand'
It 'substitutes a variable'
DOMAIN=example.org
When call myos_expand 'https://app.${DOMAIN}/'
The output should equal "https://app.example.org/"
End
It 'substitutes several, including twice the same'
DOMAIN=example.org
When call myos_expand '${DOMAIN}:${DOMAIN}'
The output should equal "example.org:example.org"
End
It 'substitutes a lazy default like any other value'
# shellcheck disable=SC2317
myos_default_LAZY_DOMAIN() { printf 'lazy.example.org'; }
When call myos_expand 'https://${LAZY_DOMAIN}/'
The output should equal "https://lazy.example.org/"
End
It 'empties an unknown variable, as make does'
When call myos_expand 'a${NOT_SET_ANYWHERE}b'
The output should equal "ab"
End
It 'runs a command substitution'
When call myos_expand 'pre-$(echo mid)-post'
The output should equal "pre-mid-post"
End
It 'leaves a malformed reference alone'
When call myos_expand 'a${not-a-name}b'
The output should equal 'a${not-a-name}b'
End
End
Describe 'myos_env_update'
It 'adds the missing variables, expanded'
printf 'DOMAIN=example.org\nAPP_URL=https://app.${DOMAIN}/\n' > "$MYOS_TMP/.env.dist"
DOMAIN=chosen.org
When call myos_env_update "$MYOS_TMP/.env" "$MYOS_TMP/.env.dist"
The status should be success
The contents of file "$MYOS_TMP/.env" should include "APP_URL=https://app.chosen.org/"
The contents of file "$MYOS_TMP/.env" should include "DOMAIN=chosen.org"
End
It 'never touches a value already recorded'
printf 'KEEP=default\n' > "$MYOS_TMP/.env.dist"
printf 'KEEP=already-chosen\n' > "$MYOS_TMP/.env"
When call myos_env_update "$MYOS_TMP/.env" "$MYOS_TMP/.env.dist"
The contents of file "$MYOS_TMP/.env" should equal "KEEP=already-chosen"
End
It 'is idempotent'
printf 'A=1\nB=${A}2\n' > "$MYOS_TMP/.env.dist"
When run source spec/unit/config_update_helper.sh "$MYOS_TMP"
The output should equal "2"
End
It 'does nothing without a template'
When call myos_env_update "$MYOS_TMP/.env" "$MYOS_TMP/nope.dist"
The status should be success
The path "$MYOS_TMP/.env" should not be exist
End
End
End
Describe 'lib/config.sh forward references'
setup() { MYOS_TMP=$(mktemp -d "${TMPDIR:-/tmp}/myos-fwd.XXXXXX"); }
cleanup() { rm -rf "$MYOS_TMP"; }
BeforeEach setup
AfterEach cleanup
It 'resolves a reference to a variable defined further down the template'
printf 'IMAGE=alpine:${VERSION}\nVERSION=3.20\n' > "$MYOS_TMP/.env.dist"
When call myos_env_update "$MYOS_TMP/.env" "$MYOS_TMP/.env.dist"
The contents of file "$MYOS_TMP/.env" should include "IMAGE=alpine:3.20"
End
It 'resolves a chain of references'
printf 'A=${B}\nB=${C}\nC=deep\n' > "$MYOS_TMP/.env.dist"
When call myos_env_update "$MYOS_TMP/.env" "$MYOS_TMP/.env.dist"
The contents of file "$MYOS_TMP/.env" should include "A=deep"
End
It 'still lets an explicit choice win over the template'
printf 'IMAGE=alpine:${VERSION}\nVERSION=3.20\n' > "$MYOS_TMP/.env.dist"
VERSION=3.19
When call myos_env_update "$MYOS_TMP/.env" "$MYOS_TMP/.env.dist"
The contents of file "$MYOS_TMP/.env" should include "IMAGE=alpine:3.19"
The contents of file "$MYOS_TMP/.env" should include "VERSION=3.19"
End
End
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