ci: initialize mirror for fresh index e2e homes

Author: Sunrisepeak

tests/e2e/42_custom_local_index.sh

@@ -10,6 +10,7 @@ TMP=$(mktemp -d)
 trap "rm -rf $TMP" EXIT
 
 export MCPP_HOME="$TMP/mcpp-home"
+"$MCPP" self config --mirror "${MCPP_E2E_TOOLCHAIN_MIRROR:-GLOBAL}" >/dev/null
 
 # ── 1. Create a fake local index directory ──────────────────────────────
 INDEX_DIR="$TMP/my-local-index"

tests/e2e/43_indices_lockfile.sh

@@ -9,6 +9,7 @@ TMP=$(mktemp -d)
 trap "rm -rf $TMP" EXIT
 
 export MCPP_HOME="$TMP/mcpp-home"
+"$MCPP" self config --mirror "${MCPP_E2E_TOOLCHAIN_MIRROR:-GLOBAL}" >/dev/null
 
 # ── 1. Create a fake local index directory ──────────────────────────────
 INDEX_DIR="$TMP/my-local-index"

tests/e2e/44_indices_e2e_integration.sh

@@ -12,6 +12,7 @@ trap "rm -rf $TMP" EXIT
 
 export MCPP_HOME="$TMP/mcpp-home"
 export MCPP_NO_AUTO_INSTALL=1
+"$MCPP" self config --mirror "${MCPP_E2E_TOOLCHAIN_MIRROR:-GLOBAL}" >/dev/null
 
 # ── 1. Local path index with real xpkg.lua ────────────────────────────
 INDEX_DIR="$TMP/my-local-index"