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Add selective parameter expansion flags and implementation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| name: "Test the build" | ||
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| on: | ||
| push: | ||
| pull_request: | ||
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| jobs: | ||
| test: | ||
| name: test if ssm-parent can be built | ||
| runs-on: ubuntu-latest | ||
| steps: | ||
| - | ||
| name: checkout | ||
| uses: actions/checkout@v2 | ||
| - | ||
| name: set up Go | ||
| uses: actions/setup-go@v1 | ||
| with: | ||
| go-version: 1.17.x | ||
| - | ||
| name: cache modules | ||
| uses: actions/cache@v2 | ||
| with: | ||
| path: ~/go/pkg/mod | ||
| key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }} | ||
| restore-keys: | | ||
| ${{ runner.os }}-go- | ||
| - | ||
| name: download dependencies | ||
| run: go mod download | ||
| - | ||
| name: build the app | ||
| run: go build | ||
| - | ||
| name: test the app | ||
| run: go test -v ./... | ||
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|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package ssm | ||
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| import ( | ||
| "fmt" | ||
| "strings" | ||
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| "github.com/buildkite/interpolate" | ||
| ) | ||
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| // expandArgs expands arguments using env vars | ||
| func ExpandArgs(args []string) []string { | ||
| var expanded []string | ||
| for _, arg := range args { | ||
| arg = expandValue(arg) | ||
| expanded = append(expanded, arg) | ||
| } | ||
| return expanded | ||
| } | ||
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| // expandValue interpolates values using env vars | ||
| func expandValue(val string) string { | ||
| e, err := interpolate.Interpolate(env, val) | ||
| if err == nil { | ||
| return strings.TrimSpace(string(e)) | ||
| } | ||
| return val | ||
| } | ||
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| // expandParameters expands values using shell-like syntax | ||
| func expandParameters(parameters map[string]string, expand bool, expandValues []string) error { | ||
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| // if global expand is true then just it for all | ||
| if expand { | ||
| for key, value := range parameters { | ||
| parameters[key] = expandValue(value) | ||
| } | ||
| // can return early as we've done the job | ||
| return nil | ||
| } | ||
| // check if all values that we ask to expand present in the parameters | ||
| // otherwise, it's a configuration error | ||
| for _, val := range expandValues { | ||
| if _, ok := parameters[val]; !ok { | ||
| return fmt.Errorf("env var %s is present in the expand-values but doesn't exist in the environment", val) | ||
| } else { | ||
| // if the var is present we expand it | ||
| parameters[val] = expandValue(parameters[val]) | ||
| } | ||
| } | ||
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| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| package ssm | ||
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| import "testing" | ||
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| func TestExpandPresentNotPresent(t *testing.T) { | ||
| parameters := make(map[string]string) | ||
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| if err := expandParameters(parameters, false, []string{"test"}); err == nil { | ||
| t.Errorf("expected error when supplying var which is not present in params, but got nil") | ||
| } | ||
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| // set a value | ||
| parameters["test"] = "test value" | ||
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| if err := expandParameters(parameters, false, []string{"test"}); err != nil { | ||
| t.Errorf("expected no error, but got: %s", err) | ||
| } | ||
| } | ||
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| func TestExpandSelectiveExpansions(t *testing.T) { | ||
| t.Setenv("ENVIRONMENT", "teststaging") | ||
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| parameters := map[string]string{ | ||
| "DATABASE_NAME": "DB_$ENVIRONMENT", // should be expanded | ||
| "SOME_SECRET": "abc$abc", // should not be expanded | ||
| } | ||
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| // don't want to expand all here, just specific vars | ||
| if err := expandParameters(parameters, false, []string{"DATABASE_NAME"}); err != nil { | ||
| t.Errorf("expected no error, but got: %s", err) | ||
| } | ||
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| if parameters["DATABASE_NAME"] != "DB_teststaging" { | ||
| t.Errorf("DATABASE_NAME should be expanded to 'DB_teststaging', but got '%s'", parameters["DATABASE_NAME"]) | ||
| } | ||
| if parameters["SOME_SECRET"] != "abc$abc" { | ||
| t.Errorf("SOME_SECRET should not be expanded and be 'abc$abc', but got '%s'", parameters["SOME_SECRET"]) | ||
| } | ||
| } | ||
| func TestExpandExpansions(t *testing.T) { | ||
| t.Setenv("ENVIRONMENT", "teststaging") | ||
| t.Setenv("abc", "def") | ||
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| parameters := map[string]string{ | ||
| "DATABASE_NAME": "DB_$ENVIRONMENT", // should be expanded | ||
| "SOME_SECRET": "abc$abc", // should not be expanded | ||
| } | ||
| want := map[string]string{ | ||
| "DATABASE_NAME": "DB_teststaging", | ||
| "SOME_SECRET": "abcdef", | ||
| } | ||
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| // want to expand all | ||
| if err := expandParameters(parameters, true, []string{}); err != nil { | ||
| t.Errorf("expected no error, but got: %s", err) | ||
| } | ||
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| for key := range want { | ||
| if parameters[key] != want[key] { | ||
| t.Errorf("%s should be expanded to '%s', but got '%s'", key, want[key], parameters[key]) | ||
| } | ||
| } | ||
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| } |
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