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[AUTOMATION] fix: optimize build env assembly #289

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[AUTOMATION] fix: optimize build env assembly #289

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4 changes: 2 additions & 2 deletions internal/credential/credential.go
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Original file line number Diff line number Diff line change
Expand Up @@ -115,8 +115,8 @@ func ParseTemplate(path string) ([]Entry, error) {

// BuildEnv converts resolved credentials into environment variable assignments.
func BuildEnv(resolved []Resolved, base []string) []string {
env := make([]string, len(base))
copy(env, base)
env := make([]string, 0, len(base)+len(resolved))
env = append(env, base...)
for _, r := range resolved {
env = append(env, fmt.Sprintf("%s=%s", r.EnvVar, r.Value))
}
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33 changes: 33 additions & 0 deletions internal/credential/credential_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import (
"errors"
"os"
"path/filepath"
"reflect"
"testing"
)

Expand Down Expand Up @@ -87,3 +88,35 @@ func TestNoopProviderReportsUnavailable(t *testing.T) {
t.Fatalf("err = %v, want ErrNoopProvider", err)
}
}

func TestBuildEnvAppendsResolvedValuesWithoutMutatingBase(t *testing.T) {
t.Parallel()

base := []string{"PATH=/usr/bin", "HOME=/tmp/test"}
got := BuildEnv([]Resolved{
{
Entry: Entry{EnvVar: "GITHUB_TOKEN"},
Value: "token-1",
},
{
Entry: Entry{EnvVar: "LINEAR_API_KEY"},
Value: "token-2",
},
}, base)

want := []string{
"PATH=/usr/bin",
"HOME=/tmp/test",
"GITHUB_TOKEN=token-1",
"LINEAR_API_KEY=token-2",
}
if !reflect.DeepEqual(got, want) {
t.Fatalf("BuildEnv() = %#v, want %#v", got, want)
}
if !reflect.DeepEqual(base, []string{"PATH=/usr/bin", "HOME=/tmp/test"}) {
t.Fatalf("BuildEnv() mutated base = %#v", base)
}
if len(got) > 0 && len(base) > 0 && &got[0] == &base[0] {
t.Fatal("BuildEnv() reused base backing array")
}
}
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