D5466.id19534.diff
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D5466.id19534.diff
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	diff --git a/swh/model/cli.py b/swh/model/cli.py
	--- a/swh/model/cli.py
	+++ b/swh/model/cli.py
	@@ -9,7 +9,11 @@

	# WARNING: do not import unnecessary things here to keep cli startup time under
	# control
	-import click
	+try:
	+ import click
	+except ImportError:
	+ print("Cannot run swh-identify; python3-click is installed.", file=sys.stderr)
	+ exit(1)

	try:
	from swh.core.cli import swh as swh_cli_group
	@@ -101,7 +105,12 @@


	def swhid_of_git_repo(path) -> CoreSWHID:
	- import dulwich.repo
	+ try:
	+ import dulwich.repo
	+ except ImportError:
	+ raise click.ClickException(
	+ "Cannot compute snapshot identifier; python3-dulwich is not installed."
	+ )

	from swh.model import hashutil
	from swh.model.identifiers import snapshot_identifier