Arm backend: Use symbolic links for dev pre-commit/push hooks

[zingo]

This ensure latest checkout versions are always used instead of the version when you last runned the script.

cc @freddan80 @per @oscarandersson8218 @digantdesai

[pytorch-bot]

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❌ 3 New Failures

As of commit c5c2d91 with merge base 2478798 ():

NEW FAILURES - The following jobs have failed:

• pull / test-samsung-models-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 76873dec314cab53b6f910214cc6d4ac8251fd5b46ebaede6447ec1d7ce2e4d5 /exec failed with exit code 1
• pull / test-samsung-quantmodels-linux / linux-job (gh)
  RuntimeError: Command docker exec -t 01e60b27ecf8bd1f8551c0ea275055f3aa8d148a4f0796a05841c29f4109e4a0 /exec failed with exit code 1
• trunk / test-mcu-cortex-m-backend / linux-job (gh)
  RuntimeError: Command docker exec -t 199a5a743f59f04813271af295327c988d10d28ba1cd8ea93a7f94eb86f81775 /exec failed with exit code 1

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[Copilot]

Pull request overview

Switches Arm backend dev hook installation from hard links to symbolic links so Git hooks always point at the current checkout’s hook scripts.

Changes:

• Update copyright header year range.
• Replace ln hard-link hook installation with ln -s using resolved paths.

---

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[Copilot]

ln -s SOURCE DESTDIR only works as intended if DESTDIR already exists and is a directory; otherwise it will create a symlink named hooks (or fail), which is not what you want for Git hooks. Consider linking to explicit destination filenames (e.g., .../hooks/pre-push and .../hooks/pre-commit) and making the script idempotent by using -f (or removing existing hooks first).

Suggested change

	ln -s "$(realpath "$git_dir/../backends/arm/scripts/pre-push")" "$(realpath "$git_dir")/hooks"
	ln -s "$(realpath "$git_dir/../backends/arm/scripts/pre-commit")" "$(realpath "$git_dir")/hooks"
	hooks_dir="$(realpath "$git_dir")/hooks"
	mkdir -p "$hooks_dir"
	ln -sf "$(realpath "$git_dir/../backends/arm/scripts/pre-push")" "$hooks_dir/pre-push"
	ln -sf "$(realpath "$git_dir/../backends/arm/scripts/pre-commit")" "$hooks_dir/pre-commit"

[Copilot]

Using realpath forces absolute symlink targets, which can break if the repo is moved (e.g., relocating a workspace). A relative symlink (computed from the hooks directory to backends/arm/scripts/...) typically preserves the 'always use latest checkout' behavior while remaining robust to path changes; also note realpath isn’t universally available in minimal environments.

Suggested change

	ln -s "$(realpath "$git_dir/../backends/arm/scripts/pre-push")" "$(realpath "$git_dir")/hooks"
	ln -s "$(realpath "$git_dir/../backends/arm/scripts/pre-commit")" "$(realpath "$git_dir")/hooks"
	mkdir -p "$git_dir/hooks"
	(
	cd "$git_dir/hooks" || exit 1
	ln -s "../../backends/arm/scripts/pre-push" pre-push
	ln -s "../../backends/arm/scripts/pre-commit" pre-commit
	)