util/lint: Update license header text for SPDX headers.

In preparation to update to SPDX license headers, add identifiers
for the licenses seen in the coreboot project and create a command
line parameter allowing only SPDX license identifiers to be detected.

Here are example locations of these licenses:
Apache-2.0 - src/soc/sifive
BSD-3-Clause - Throughout coreboot & libpayload source
GPL-2.0-only - Throughout coreboot source
GPL-2.0-or-later - Throughout coreboot source
GPL-3.0-only - util/amdtools
GPL-3.0-or-later - src/lib/[gcov/libgcov/gnat]
ISC - src/lib/ubsan.c, soc/qualcomm/ipq806x/include/soc/gsbi.h, others
MIT - soc/nvidia/tegra210/mipi_dsi.c, files in mainboard/cavium/
X11 - include/device/drm_dp_helper.h, drivers/aspeed/common/ast_tables.h

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I07a7ca408ac8563e03e189d05ef7729dfb6fc24e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36175
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>

1 files changed, 20 insertions, 2 deletions

diff --git a/util/lint/lint-000-license-headers b/util/lint/lint-000-license-headers
index 9b3553b4a4..88e15ecca0 100755
--- a/util/lint/lint-000-license-headers
+++ b/util/lint/lint-000-license-headers
@@ -62,6 +62,8 @@ cmos\.layout|\
 cmos\.default\
 "
 
+HEADER_TEXT="license header"
+
 #space separated list of directories to test
 if [ "$1" = "" ]; then
 	HEADER_DIRS="src util"
@@ -69,6 +71,11 @@ else
 	HEADER_DIRS="$1"
 fi
 
+if [ "$2" = "SPDX_ONLY" ]; then
+	SPDX_ONLY=1
+	HEADER_TEXT="SPDX identifier"
+fi
+
 LC_ALL=C export LC_ALL
 
 #get initial list from git, removing HEADER_EXCLUDED files.
@@ -96,6 +103,17 @@ check_for_license() {
 }
 
 #search the files for license headers
+check_for_license 'SPDX-License-Identifier: Apache-2.0'
+check_for_license 'SPDX-License-Identifier: BSD-3-Clause'
+check_for_license 'SPDX-License-Identifier: GPL-2.0-only'
+check_for_license 'SPDX-License-Identifier: GPL-2.0-or-later'
+check_for_license 'SPDX-License-Identifier: GPL-3.0-only'
+check_for_license 'SPDX-License-Identifier: GPL-3.0-or-later'
+check_for_license 'SPDX-License-Identifier: ISC'
+check_for_license 'SPDX-License-Identifier: MIT'
+check_for_license 'SPDX-License-Identifier: X11'
+
+if [ ! "${SPDX_ONLY}" = "1" ]; then
 check_for_license "under the terms of the GNU General Public License" \
 		"WITHOUT ANY WARRANTY"
 check_for_license 'IS PROVIDED .*"AS IS"'
@@ -106,13 +124,13 @@ check_for_license 'assumes any liability or responsibility for the use'
 check_for_license 'THE AUTHORS DISCLAIM.*ALL WARRANTIES WITH REGARD TO THIS SOFTWARE'
 check_for_license 'No license required'
 check_for_license 'GNU Lesser General Public'
-check_for_license 'SPDX-License-Identifier:.*GPL-2.0-or-later'
+fi
 
 for file in $headerlist; do
 	# Verify the file exists, and has content that requires a header
 	# This assumes that a file that has 4 lines or fewer is not notable
 	# enough to require a license.
 	if [ -f "$file" ] && [ "$(wc -l < "$file")" -gt 4 ]; then
-		echo "$file has no recognized license header."
+		echo "$file has no recognized ${HEADER_TEXT}."
 	fi
 done