import main files from tag-release

I'm using an identical pattern in a number of projects now, so I'm
factoring this out into a separate repo.

1 files changed, 75 insertions, 0 deletions

diff --git a/main.sh b/main.sh
new file mode 100755
index 0000000..8b7e482
--- /dev/null
+++ b/main.sh
@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+
+# Copyright (c) 2026 Egor Tensin <egor@tensin.name>
+# This file is part of the "test-harness" project.
+# For details, see https://github.com/egor-tensin/test-harness
+# Distributed under the MIT License.
+
+set -o errexit -o nounset -o pipefail
+shopt -s inherit_errexit lastpipe
+
+script_dir="$( dirname -- "${BASH_SOURCE[0]}" )"
+script_dir="$( cd -- "$script_dir" && pwd )"
+readonly script_dir
+script_name="$( basename -- "${BASH_SOURCE[0]}" )"
+readonly script_name
+
+readonly tests_dir="$script_dir/.."
+
+source "$script_dir/lib/log.sh"
+
+run_test_file() {
+    local test_file
+    for test_file; do
+        source "$script_dir/lib/test.sh"
+        source "$tests_dir/$test_file"
+
+        log_test_start "$test_file"
+
+        set +e
+        (
+            set -o errexit -o nounset -o pipefail
+            shopt -s inherit_errexit lastpipe
+
+            trap test_cleanup_global EXIT
+            test_setup_global
+            test_run
+        )
+        local ret="$?"
+        set -e
+
+        log_test_finish "$test_file" "$ret"
+    done
+}
+
+main() {
+    if [ "$#" -gt 1 ]; then
+        echo "usage: $script_name [PATTERN]" >&2
+        return 1
+    fi
+
+    local -a test_files=()
+    local test_file
+
+    local pattern='*'
+    [ "$#" -gt 0 ] && pattern="$1"
+
+    find "$tests_dir" \
+        -mindepth 1 \
+        -maxdepth 1 \
+        -type f \
+        -regex '.*/tst-.*\.sh$' \
+        -regextype posix-basic \
+        -name "$pattern" \
+        -printf '%P\0' \
+        | sort -z \
+        | \
+    while IFS= read -d '' -r test_file; do
+        test_files+=("$test_file")
+    done
+
+    run_test_file ${test_files[@]+"${test_files[@]}"}
+    log_tests_summary
+}
+
+main "$@"