test: cover effective Git hook paths

Author: ORESoftware

.ores-lint/test-install-git-hooks.sh

@@ -0,0 +1,27 @@
+#!/bin/sh
+set -eu
+SOURCE_DIR=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)
+TMP_ROOT=$(mktemp -d "${TMPDIR:-/tmp}/ores-lint-hooks.XXXXXX")
+trap 'rm -rf "$TMP_ROOT"' EXIT HUP INT TERM
+new_repo() {
+  repo="$TMP_ROOT/$1"
+  mkdir -p "$repo/.ores-lint"
+  git -C "$repo" init -q
+  cp "$SOURCE_DIR/install-git-hooks.sh" "$repo/.ores-lint/install-git-hooks.sh"
+  printf '%s\n' '#!/bin/sh' ': > "$(git rev-parse --show-toplevel)/lint-ran"' > "$repo/.ores-lint/lint.sh"
+  chmod +x "$repo/.ores-lint/lint.sh"
+  printf '%s\n' "$repo"
+}
+repo=$(new_repo default)
+(cd "$repo" && sh .ores-lint/install-git-hooks.sh && hook="$(git rev-parse --absolute-git-dir)/hooks/pre-push" && test -x "$hook" && "$hook" && test -f lint-ran)
+repo=$(new_repo relative)
+(cd "$repo" && git config core.hooksPath .githooks && sh .ores-lint/install-git-hooks.sh && test -x .githooks/pre-push && .githooks/pre-push && test -f lint-ran && test ! -e "$(git rev-parse --absolute-git-dir)/hooks/pre-push")
+repo=$(new_repo absolute)
+absolute_hooks="$TMP_ROOT/absolute-hooks"
+(cd "$repo" && git config core.hooksPath "$absolute_hooks" && sh .ores-lint/install-git-hooks.sh && test -x "$absolute_hooks/pre-push")
+repo=$(new_repo tilde)
+mkdir -p "$TMP_ROOT/home"
+(cd "$repo" && HOME="$TMP_ROOT/home" git config core.hooksPath '~/custom-hooks' && HOME="$TMP_ROOT/home" sh .ores-lint/install-git-hooks.sh && test -x "$TMP_ROOT/home/custom-hooks/pre-push")
+repo=$(new_repo conflict)
+(cd "$repo" && git config core.hooksPath .githooks && mkdir -p .githooks && printf '%s\n' '#!/bin/sh' 'echo existing' > .githooks/pre-push && chmod +x .githooks/pre-push && before=$(cat .githooks/pre-push) && if sh .ores-lint/install-git-hooks.sh; then exit 1; fi && test "$(cat .githooks/pre-push)" = "$before")
+printf '%s\n' 'ores-lint Git hook installer contract: PASS'