Generate license pdf with complex license expressions

CMK-20986

Change-Id: I3942709077342b48b3c083772241ad70cc501d03

omd/license_sources/build_license_texts_pdf.py

@@ -7,8 +7,10 @@
 found under ./license_texts/"""
 
 import csv
-import sys
-import traceback
+import html
+import re
+from dataclasses import dataclass
+from hashlib import sha1
 from pathlib import Path
 
 from reportlab.lib.pagesizes import letter
@@ -20,7 +22,86 @@
 from reportlab.platypus.doctemplate import PageTemplate
 from reportlab.platypus.frames import Frame
 from reportlab.platypus.tableofcontents import TableOfContents
-from svglib.svglib import svg2rlg  # type: ignore[import-not-found]
+from svglib.svglib import svg2rlg
+
+
+def tokenize(input_s: str) -> list[str]:
+    ret_list = []
+    stack = ""
+    for token in re.split(r"(\(|\)|\s)", input_s):
+        # the whitespaces
+        if not token.strip():
+            continue
+        if token in ("(", ")", "AND", "OR"):
+            if stack:
+                ret_list.append(stack.strip())
+                stack = ""
+            ret_list.append(token)
+        else:
+            stack += " " + token
+    if stack:
+        ret_list.append(stack.strip())
+    return ret_list
+
+
+def test_tokenize() -> None:
+    assert tokenize("MIT AND BSD-3-Clause AND Zlib") == [
+        "MIT",
+        "AND",
+        "BSD-3-Clause",
+        "AND",
+        "Zlib",
+    ]
+    assert tokenize("BSD-3-Clause") == ["BSD-3-Clause"]
+    assert tokenize(
+        "(DocumentRef-spdx-tool-1.2:LicenseRef-MIT-Style-2 OR (Apache-2.0 AND PostgreSQL OR OpenSSL)) AND (BSD-3-Clause OR Apache-2.0 WITH 389-exception)"
+    ) == [
+        "(",
+        "DocumentRef-spdx-tool-1.2:LicenseRef-MIT-Style-2",
+        "OR",
+        "(",
+        "Apache-2.0",
+        "AND",
+        "PostgreSQL",
+        "OR",
+        "OpenSSL",
+        ")",
+        ")",
+        "AND",
+        "(",
+        "BSD-3-Clause",
+        "OR",
+        "Apache-2.0 WITH 389-exception",
+        ")",
+    ]
+
+
+def license_str_to_html(license_str: str) -> str:
+    """return the license_str with links to the license"""
+
+    def make_link(license_str: str) -> str:
+        return f'<a href="#{sha1(license_str.encode(), usedforsecurity=False).hexdigest()}">{license_str}</a>'
+
+    ret_str = ""
+    for token in tokenize(license_str):
+        if token in ("(", ")"):
+            ret_str += token
+        elif token in ("AND", "OR"):
+            ret_str += " " + token + " "
+        else:
+            ret_str += make_link(token)
+    return ret_str
+
+
+def test_license_str_to_html() -> None:
+    assert (
+        license_str_to_html("MIT AND BSD-3-Clause AND Zlib")
+        == '<a href="#89690ac571dcf4c9c40c842efed3f11171d07b29">MIT</a> AND <a href="#d6f9c69f2854ede6f6c6c74c61a8e511654060d0">BSD-3-Clause</a> AND <a href="#11bb391f0b17e28b6022b1e54849a09b53bb2edb">Zlib</a>'
+    )
+    assert (
+        license_str_to_html("BSD-3-Clause")
+        == '<a href="#d6f9c69f2854ede6f6c6c74c61a8e511654060d0">BSD-3-Clause</a>'
+    )
 
 
 class MyDocTemplate(SimpleDocTemplate):  # type: ignore[misc]
@@ -52,52 +133,45 @@ def afterFlowable(self, flowable):
             self.notify("TOCEntry", tuple(E))
 
 
-# This function makes our headings
-def heading(text, sty):
-    from hashlib import sha1
-
+def heading(text: str, link: str, sty: PS) -> Paragraph:
+    """make a heading"""
     # Create bookmarkname
-    bn = sha1((text + sty.name).encode("utf-8")).hexdigest()  # nosec B324
+    bn = sha1(link.encode("utf-8"), usedforsecurity=False).hexdigest()
     # Modify paragraph text to include an anchor point with name bn
-    h = Paragraph(text + '<a name="%s"/>' % bn, sty)
+    h = Paragraph(f'{text}<a name="{bn}"/>', sty)
     # Store the bookmark name on the flowable so afterFlowable can see this
-    h._bookmarkName = bn  # noqa: SLF001 TODO & FIXME: Don't change private object's attributes :-|
+    h._bookmarkName = bn  # pylint: disable=protected-access  # noqa: SLF001
     return h
 
 
-def add_page_number(canvas):
+def add_page_number(canvas, _doc) -> None:
     page_num = canvas.getPageNumber()
-    if page_num < 4:
+    if page_num < 1:
         return
     text = "%s" % page_num
     canvas.setFont("Calibri", 12)
     canvas.drawRightString(20 * cm, 1 * cm, text)
 
 
-def used_licenses_from_csv(path_licenses_csv):
-    used_licenses = set()
-    with open(path_licenses_csv) as csv_file:
-        csv_file.readline()  # Drop line of headers
-        rows = list(csv.reader(csv_file))
-        used_licenses = {row[2] for row in rows if row[2]}
-    return sorted(used_licenses)
+@dataclass(frozen=True)
+class Dependency:
+    name: str
+    version: str
+    license_str: str
 
 
-def main():
-    try:
-        path_omd = Path(__file__).resolve().parent.parent
-    except BaseException:
-        raise OSError
-
-    path_license_texts = path_omd / "license_sources/license_texts/"
-    path_pdf = path_omd / "License_texts.pdf"
-    path_logo = path_omd / "license_sources/checkmk_logo.svg"
-    path_licenses_csv = path_omd / "Licenses.csv"
+def read_license_csv(path_licenses_csv: Path) -> list[Dependency]:
+    with path_licenses_csv.open() as csv_file:
+        reader = csv.DictReader(csv_file)
+        return [
+            Dependency(name=row["Name"], version=row["Version"], license_str=row["License"])
+            for row in reader
+            if row["Version"] or row["License"]
+        ]
 
-    used_licenses = used_licenses_from_csv(path_licenses_csv)
 
-    registerFont(TTFont("Calibri", "Calibri.ttf"))
-    doc = SimpleDocTemplate(
+def setup_document(path_pdf: Path, path_logo: Path) -> tuple[MyDocTemplate, list]:
+    doc = MyDocTemplate(
         str(path_pdf),
         pagesize=letter,
         bottomMargin=0.4 * inch,
@@ -120,8 +194,6 @@ def main():
     ]
     cover = PS(name="Cover", fontSize=16, leading=22, alignment=1)
     title = PS(name="Title", fontSize=24, leading=16)
-    h1 = PS(name="Heading1", fontSize=16, leading=16)
-    normal = PS(name="Normal", fontSize=8)
     spacer = Spacer(width=0, height=2 * cm)
 
     drawing = svg2rlg(str(path_logo))
@@ -144,29 +216,68 @@ def main():
     story.append(spacer)
     story.append(toc)
 
-    for used_license in used_licenses:
-        if used_license == "Public-Domain":
-            continue
+    return doc, story
+
+
+def used_licenses(dependencies: list[Dependency]) -> list[str]:
+    return sorted(
+        {
+            token
+            for d in dependencies
+            for token in tokenize(d.license_str)
+            if token not in ("(", ")", "AND", "OR")
+        }
+    )
+
+
+def main():
+    path_omd = Path(__file__).resolve().parent.parent
+
+    path_license_texts = path_omd / "license_sources/license_texts/"
+    path_pdf = path_omd / "License_texts.pdf"
+    path_logo = path_omd / "license_sources/checkmk_logo.svg"
+    path_licenses_csv = path_omd / "Licenses.csv"
+
+    dependencies = read_license_csv(path_licenses_csv)
+
+    registerFont(TTFont("Calibri", path_omd / "license_sources" / "Calibri.ttf"))
+
+    doc, story = setup_document(path_pdf, path_logo)
+
+    h1 = PS(name="Heading1", fontSize=16, leading=16, spaceAfter=1 * cm)
+    h2 = PS(name="Heading2", fontSize=14, leading=16)
+    normal = PS(name="Normal", fontSize=8)
+
+    story.append(PageBreak())
+    story.append(heading("Used libraries", "used_libraries", h1))
+    for dependency in dependencies:
+        story.append(
+            Paragraph(
+                f"{dependency.name}, {dependency.version}: {license_str_to_html(dependency.license_str)}",
+                normal,
+                bulletText="-",
+            )
+        )
+
+    story.append(PageBreak())
+    story.append(heading("Licenses", "libraries", h1))
 
+    for used_license in used_licenses(dependencies):
         file_path = path_license_texts / ("%s.txt" % used_license.lower())
         if file_path.is_file():
             with file_path.open(encoding="utf-8") as txt_file:
-                headline = "<b>%s</b>" % txt_file.readline().replace("\n", "<br /><br />\n")
-                text_content = txt_file.read().replace("\n", "<br />\n")
+                headline = f"<b>{txt_file.readline().strip()} ({used_license})</b>"
+                text_content = html.escape(txt_file.read()).replace("\n", "<br />\n")
             story.append(PageBreak())
-            story.append(heading(headline, h1))
+            story.append(heading(headline, used_license, h2))
             story.append(Paragraph(text_content, normal))
         else:
-            print(f'No license text file found for ID "{used_license}" and path {file_path}')
+            raise RuntimeError(
+                f'No license text file found for ID "{used_license}" and path {file_path}'
+            )
 
-    doc = MyDocTemplate(str(path_pdf))
     doc.multiBuild(story, onLaterPages=add_page_number)
 
 
 if __name__ == "__main__":
-    try:
-        main()
-        sys.exit(0)
-    except Exception:
-        sys.stderr.write(traceback.format_exc())
-        sys.exit(1)
+    main()

omd/license_sources/license_texts/0bsd.txt

@@ -0,0 +1,7 @@
+BSD Zero Clause License
+
+Copyright (C) YEAR by AUTHOR EMAIL
+
+Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

omd/license_sources/license_texts/apache-2.0 with llvm-exception.txt

@@ -0,0 +1,72 @@
+Apache License
+Version 2.0, January 2004
+http://www.apache.org/licenses/
+
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+
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+
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