Python: Move Python language pack tooling to external repo

This is essentially the contents of `language-packs/python/tools` with some minor
modifications to account for the changed location.

Of note: we explicitly exclude the `recorded-call-graph-metrics` director that
was already present in `python/tools`. When we revisit this directory for some
cleanup (e.g. to get rid of the `lgtm` references), we'll probably want to switch
to an explicit list of sources to include.

python/tools/BUILD.bazel

@@ -0,0 +1,11 @@
+load("@semmle_code//:dist.bzl", "pack_zip")
+
+pack_zip(
+    name = "tools",
+    srcs = glob(["**/*"]),
+    excludes = [
+        "BUILD.bazel",
+    ] + glob(["recorded-call-graph-metrics/**"]),
+    prefix = "tools",
+    visibility = ["//visibility:public"],
+)

python/tools/autobuild.cmd

@@ -0,0 +1,8 @@
+@echo off
+
+rem Legacy environment variables for the autobuild infrastructure.
+set LGTM_SRC=%CD%
+set LGTM_WORKSPACE=%CODEQL_EXTRACTOR_PYTHON_SCRATCH_DIR%
+
+type NUL && python "%CODEQL_EXTRACTOR_PYTHON_ROOT%\tools\index.py"
+exit /b %ERRORLEVEL%

python/tools/autobuild.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -eu
+
+# Legacy environment variables for the autobuild infrastructure.
+LGTM_SRC="$(pwd)"
+LGTM_WORKSPACE="$CODEQL_EXTRACTOR_PYTHON_SCRATCH_DIR"
+export LGTM_SRC
+export LGTM_WORKSPACE
+
+if which python3 >/dev/null; then
+    exec python3 "$CODEQL_EXTRACTOR_PYTHON_ROOT/tools/index.py"
+elif which python >/dev/null; then
+    exec python "$CODEQL_EXTRACTOR_PYTHON_ROOT/tools/index.py"
+else
+    echo "ERROR: Could not find a valid Python distribution. It should be available when running 'which python' or 'which python3' in your shell. Python 2 is no longer supported."
+    exit 1
+fi

python/tools/lgtm-scripts/index.cmd

@@ -0,0 +1,3 @@
+@echo off
+
+py "%CODEQL_EXTRACTOR_PYTHON_ROOT%\tools\index.py"

python/tools/lgtm-scripts/index.sh

@@ -0,0 +1,5 @@
+#! /bin/bash
+
+set -eu
+
+python "${CODEQL_EXTRACTOR_PYTHON_ROOT}/tools/index.py"

python/tools/lgtm-scripts/python_setup.cmd

@@ -0,0 +1,3 @@
+@echo off
+
+py "%CODEQL_EXTRACTOR_PYTHON_ROOT%\tools\setup.py" || EXIT /B 0

python/tools/lgtm-scripts/python_setup.sh

@@ -0,0 +1,5 @@
+#! /bin/bash
+
+set -eu
+
+python "${CODEQL_EXTRACTOR_PYTHON_ROOT}/tools/setup.py" || true

python/tools/pre-finalize.cmd

@@ -0,0 +1,11 @@
+@echo off
+
+type NUL && "%CODEQL_DIST%\codeql" database index-files ^
+    --include-extension=.yaml ^
+    --include-extension=.yml ^
+    --size-limit=5m ^
+    --language yaml ^
+    -- ^
+    "%CODEQL_EXTRACTOR_PYTHON_WIP_DATABASE%"
+
+exit /b %ERRORLEVEL%

python/tools/pre-finalize.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+set -eu
+
+"$CODEQL_DIST/codeql" database index-files \
+    --include-extension=.yaml \
+    --include-extension=.yml \
+    --size-limit=5m \
+    --language yaml \
+    -- \
+    "$CODEQL_EXTRACTOR_PYTHON_WIP_DATABASE"