chore: checkpoint before Python removal

vendor/num-bigint-dig/ci/rustup.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+# Use rustup to locally run the same suite of tests as .travis.yml.
+# (You should first install/update all versions listed below.)
+
+set -ex
+
+export TRAVIS_RUST_VERSION
+for TRAVIS_RUST_VERSION in 1.15.0 1.22.0 1.26.0 stable beta nightly; do
+    run="rustup run $TRAVIS_RUST_VERSION"
+    $run cargo build --verbose
+    $run $PWD/ci/test_full.sh
+done

vendor/num-bigint-dig/ci/test_full.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -ex
+
+echo Testing num-bigint on rustc ${TRAVIS_RUST_VERSION}
+
+FEATURES="serde i128 u64_digit prime"
+
+export RUST_BACKTRACE=1
+
+# num-bigint should build and test everywhere.
+cargo build --verbose
+cargo test --verbose
+
+# It should build with minimal features too.
+cargo build --no-default-features --features="std"
+cargo test --no-default-features --features="std"
+
+# It should build in no_std
+if [[ "$TRAVIS_RUST_VERSION" == "nightly" ]]; then
+  rustup target add thumbv7m-none-eabi
+  cargo build --no-default-features --target=thumbv7m-none-eabi
+
+  # It should work in no_std on nightly.
+  # Note: Doctest might show an error: https://github.com/rust-lang/rust/issues/54010
+  # The "error" is wrong however, the doctests still run.
+  cargo test --no-default-features
+fi
+
+# Each isolated feature should also work everywhere.
+for feature in $FEATURES; do
+  cargo build --verbose --no-default-features --features="std $feature"
+  cargo test --verbose --no-default-features --features="std $feature"
+
+  # Ensure that feature also works in nostd context on nightly.
+  if [[ "$TRAVIS_RUST_VERSION" == "nightly" ]]; then
+    cargo build --verbose --no-default-features --features="$feature"
+    cargo test --verbose --no-default-features --features="$feature"
+  fi
+done
+
+# test all supported features together
+cargo build --features="std $FEATURES"
+cargo test --features="std $FEATURES"
+
+# make sure benchmarks can be built
+if [[ "$TRAVIS_RUST_VERSION" == "nightly" ]]; then
+  cd benchmark_crate
+  cargo bench --all-features --no-run
+fi