X-Git-Url: https://git.madduck.net/etc/neomutt.git/blobdiff_plain/ba392f61872a76df38acaf633843cf00c9f6e139..36b999025f767b33be493a29e7636036b17b5dca:/.config/neomutt/buildmimetree.py diff --git a/.config/neomutt/buildmimetree.py b/.config/neomutt/buildmimetree.py index bad8bbe..97ada97 100755 --- a/.config/neomutt/buildmimetree.py +++ b/.config/neomutt/buildmimetree.py @@ -6,8 +6,10 @@ # # Configuration: # neomuttrc (needs to be a single line): +# set my_mdwn_extensions="extra,admonition,codehilite,sane_lists,smarty" # macro compose B "\ -# source '$my_confdir/buildmimetree.py setup|'\ +# source '$my_confdir/buildmimetree.py \ +# --tempdir $tempdir --extensions $my_mdwn_extensions|'\ # sourc e \$my_mdwn_postprocess_cmd_file\ # " "Convert message into a modern MIME tree with inline images" # @@ -21,8 +23,8 @@ # - python3-markdown # Optional: # - pytest -# - Pynliner -# - Pygments, if installed, then syntax highlighting is enabled +# - Pynliner, provides --css-file and thus inline styling of HTML output +# - Pygments, then syntax highlighting for fenced code is enabled # # Latest version: # https://git.madduck.net/etc/neomutt.git/blob_plain/HEAD:/.config/neomutt/buildmimetree.py @@ -36,7 +38,13 @@ import pathlib import markdown import tempfile import argparse -from collections import namedtuple +import re +import mimetypes +from collections import namedtuple, OrderedDict +from markdown.extensions import Extension +from markdown.inlinepatterns import ImageInlineProcessor, IMAGE_LINK_RE +from email.utils import make_msgid +from urllib import request def parse_cli_args(*args, **kwargs): @@ -47,59 +55,66 @@ def parse_cli_args(*args, **kwargs): ) ) parser.epilog = ( - "Copyright © 2022 martin f. krafft .\n" + "Copyright © 2023 martin f. krafft .\n" "Released under the MIT licence" ) - subp = parser.add_subparsers(help="Sub-command parsers", dest="mode") - parser_setup = subp.add_parser("setup", help="Setup phase") - parser_massage = subp.add_parser("massage", help="Massaging phase") + parser.add_argument( + "--extensions", + type=str, + default="", + help="Markdown extension to use (comma-separated list)", + ) - parser_setup.add_argument( - "--debug-commands", + if _PYNLINER: + parser.add_argument( + "--css-file", + type=str, + default="", + help="CSS file to merge with the final HTML", + ) + else: + parser.set_defaults(css_file=None) + + parser.add_argument( + "--only-build", action="store_true", - help="Turn on debug logging of commands generated to stderr", + help="Only build, don't send the message", ) - parser_setup.add_argument( - "--extension", - "-x", - metavar="EXTENSION", - dest="extensions", - nargs="?", - default=[], - action="append", - help="Markdown extension to add to the list of extensions use", + parser.add_argument( + "--tempdir", + default=None, + help="Specify temporary directory to use for attachments", ) - parser_massage.add_argument( + parser.add_argument( "--debug-commands", action="store_true", help="Turn on debug logging of commands generated to stderr", ) - parser_massage.add_argument( - "--debug-walk", - action="store_true", - help="Turn on debugging to stderr of the MIME tree walk", - ) - - parser_massage.add_argument( - "--extensions", - metavar="EXTENSIONS", - type=str, - default="", - help="Markdown extension to use (comma-separated list)", + subp = parser.add_subparsers(help="Sub-command parsers", dest="mode") + massage_p = subp.add_parser( + "massage", help="Massaging phase (internal use)" ) - parser_massage.add_argument( + massage_p.add_argument( "--write-commands-to", + "-o", metavar="PATH", dest="cmdpath", + required=True, help="Temporary file path to write commands to", ) - parser_massage.add_argument( + massage_p.add_argument( + "--debug-walk", + action="store_true", + help="Turn on debugging to stderr of the MIME tree walk", + ) + + massage_p.add_argument( "MAILDRAFT", nargs="?", help="If provided, the script is invoked as editor on the mail draft", @@ -108,6 +123,110 @@ def parse_cli_args(*args, **kwargs): return parser.parse_args(*args, **kwargs) +# [ MARKDOWN WRAPPING ] ####################################################### + + +InlineImageInfo = namedtuple( + "InlineImageInfo", ["cid", "desc"], defaults=[None] +) + + +class InlineImageExtension(Extension): + class RelatedImageInlineProcessor(ImageInlineProcessor): + def __init__(self, re, md, ext): + super().__init__(re, md) + self._ext = ext + + def handleMatch(self, m, data): + el, start, end = super().handleMatch(m, data) + if "src" in el.attrib: + src = el.attrib["src"] + if "://" not in src or src.startswith("file://"): + # We only inline local content + cid = self._ext.get_cid_for_image(el.attrib) + el.attrib["src"] = f"cid:{cid}" + return el, start, end + + def __init__(self): + super().__init__() + self._images = OrderedDict() + + def extendMarkdown(self, md): + md.registerExtension(self) + inline_image_proc = self.RelatedImageInlineProcessor( + IMAGE_LINK_RE, md, self + ) + md.inlinePatterns.register(inline_image_proc, "image_link", 150) + + def get_cid_for_image(self, attrib): + msgid = make_msgid()[1:-1] + path = attrib["src"] + if path.startswith("/"): + path = f"file://{path}" + self._images[path] = InlineImageInfo( + msgid, attrib.get("title", attrib.get("alt")) + ) + return msgid + + def get_images(self): + return self._images + + +def markdown_with_inline_image_support( + text, *, extensions=None, extension_configs=None +): + inline_image_handler = InlineImageExtension() + extensions = extensions or [] + extensions.append(inline_image_handler) + mdwn = markdown.Markdown( + extensions=extensions, extension_configs=extension_configs + ) + htmltext = mdwn.convert(text) + + images = inline_image_handler.get_images() + + def replace_image_with_cid(matchobj): + for m in (matchobj.group(1), f"file://{matchobj.group(1)}"): + if m in images: + return f"(cid:{images[m].cid}" + return matchobj.group(0) + + text = re.sub(r"\(([^)\s]+)", replace_image_with_cid, text) + return text, htmltext, images + + +# [ CSS STYLING ] ############################################################# + +try: + import pynliner + + _PYNLINER = True + +except ImportError: + _PYNLINER = False + +try: + from pygments.formatters import get_formatter_by_name + + _CODEHILITE_CLASS = "codehilite" + + _PYGMENTS_CSS = get_formatter_by_name( + "html", style="default" + ).get_style_defs(f".{_CODEHILITE_CLASS}") + +except ImportError: + _PYGMENTS_CSS = None + + +def apply_styling(html, css): + return ( + pynliner.Pynliner() + .from_string(html) + .with_cssString("\n".join(s for s in [_PYGMENTS_CSS, css] if s)) + .run() + ) + + # [ PARTS GENERATION ] ######################################################## @@ -133,47 +252,86 @@ class Multipart( def __str__(self): return f" children={len(self.children)}" + def __hash__(self): + return hash(str(self.subtype) + "".join(str(self.children))) + + +def filewriter_fn(path, content, mode="w", **kwargs): + with open(path, mode, **kwargs) as out_f: + out_f.write(content) + + +def collect_inline_images( + images, *, tempdir=None, filewriter_fn=filewriter_fn +): + relparts = [] + for path, info in images.items(): + data = request.urlopen(path) + + mimetype = data.headers["Content-Type"] + ext = mimetypes.guess_extension(mimetype) + tempfilename = tempfile.mkstemp(prefix="img", suffix=ext, dir=tempdir) + path = pathlib.Path(tempfilename[1]) + + filewriter_fn(path, data.read(), "w+b") + + relparts.append( + Part( + *mimetype.split("/"), + path, + cid=info.cid, + desc=f"Image: {info.desc}", + ) + ) + + return relparts -def convert_markdown_to_html(maildraft, *, extensions=None): - draftpath = pathlib.Path(maildraft) + +def convert_markdown_to_html( + origtext, + draftpath, + *, + cssfile=None, + filewriter_fn=filewriter_fn, + tempdir=None, + extensions=None, + extension_configs=None, +): + # TODO extension_configs need to be handled differently + extension_configs = extension_configs or {} + extension_configs.setdefault("pymdownx.highlight", {}) + extension_configs["pymdownx.highlight"]["css_class"] = _CODEHILITE_CLASS + + origtext, htmltext, images = markdown_with_inline_image_support( + origtext, extensions=extensions, extension_configs=extension_configs + ) + + filewriter_fn(draftpath, origtext, encoding="utf-8") textpart = Part( "text", "plain", draftpath, "Plain-text version", orig=True ) - with open(draftpath, "r", encoding="utf-8") as textmarkdown: - text = textmarkdown.read() - - mdwn = markdown.Markdown(extensions=extensions) - html = mdwn.convert(text) + htmltext = apply_styling(htmltext, cssfile) htmlpath = draftpath.with_suffix(".html") + filewriter_fn( + htmlpath, htmltext, encoding="utf-8", errors="xmlcharrefreplace" + ) htmlpart = Part("text", "html", htmlpath, "HTML version") - with open( - htmlpath, "w", encoding="utf-8", errors="xmlcharrefreplace" - ) as texthtml: - texthtml.write(html) - - logopart = Part( - "image", - "png", - "/usr/share/doc/neomutt/logo/neomutt-256.png", - "Logo", - "neomutt-256.png", + altpart = Multipart( + "alternative", [textpart, htmlpart], "Group of alternative content" ) - return Multipart( - "relative", - [ - Multipart( - "alternative", - [textpart, htmlpart], - "Group of alternative content", - ), - logopart, - ], - "Group of related content", + imgparts = collect_inline_images( + images, tempdir=tempdir, filewriter_fn=filewriter_fn ) + if imgparts: + return Multipart( + "relative", [altpart] + imgparts, "Group of related content" + ) + else: + return altpart class MIMETreeDFWalker: @@ -282,17 +440,18 @@ class MuttCommands: def do_setup( - extensions=None, *, out_f=sys.stdout, temppath=None, debug_commands=False + *, + out_f=sys.stdout, + temppath=None, + tempdir=None, + debug_commands=False, ): - extensions = extensions or [] temppath = temppath or pathlib.Path( - tempfile.mkstemp(prefix="muttmdwn-")[1] + tempfile.mkstemp(prefix="muttmdwn-", dir=tempdir)[1] ) cmds = MuttCommands(out_f, debug=debug_commands) - editor = f"{sys.argv[0]} massage --write-commands-to {temppath}" - if extensions: - editor = f'{editor} --extensions {",".join(extensions)}' + editor = f"{' '.join(sys.argv)} massage --write-commands-to {temppath}" cmds.cmd('set my_editor="$editor"') cmds.cmd('set my_edit_headers="$edit_headers"') @@ -304,11 +463,15 @@ def do_setup( def do_massage( - maildraft, + draft_f, + draftpath, cmd_f, *, extensions=None, + cssfile=None, converter=convert_markdown_to_html, + only_build=False, + tempdir=None, debug_commands=False, debug_walk=False, ): @@ -331,7 +494,13 @@ def do_massage( cmds.flush() extensions = extensions.split(",") if extensions else [] - tree = converter(maildraft, extensions=extensions) + tree = converter( + draft_f.read(), + draftpath, + cssfile=cssfile, + tempdir=tempdir, + extensions=extensions, + ) mimetree = MIMETreeDFWalker(debug=debug_walk) @@ -341,23 +510,29 @@ def do_massage( depth-first, and responsible for telling NeoMutt how to assemble the tree. """ + KILL_LINE = r"\Ca\Ck" + if isinstance(item, Part): # We've hit a leaf-node, i.e. an alternative or a related part # with actual content. - # If the part is not an original part, i.e. doesn't already - # exist, we must first add it. - if not item.orig: + # Let's add the part + if item.orig: + # The original source already exists in the NeoMutt tree, but + # the underlying file may have been modified, so we need to + # update the encoding, but that's it: + cmds.push("") + else: + # … whereas all other parts need to be added, and they're all + # considered to be temporary and inline: cmds.push(f"{item.path}") cmds.push("") - if item.cid: - cmds.push(f"\\Ca\\Ck{item.cid}") - # If the item (including the original) comes with a - # description, then we might just as well update the NeoMutt + # If the item (including the original) comes with additional + # information, then we might just as well update the NeoMutt # tree now: - if item.desc: - cmds.push(f"\\Ca\\Ck{item.desc}") + if item.cid: + cmds.push(f"{KILL_LINE}{item.cid}") elif isinstance(item, Multipart): # This node has children, but we already visited them (see @@ -366,19 +541,19 @@ def do_massage( # appropriate grouping: if item.subtype == "alternative": cmds.push("") - elif item.subtype == "relative": + elif item.subtype in ("relative", "related"): cmds.push("") elif item.subtype == "multilingual": cmds.push("") - # Again, if there is a description, we might just as well: - if item.desc: - cmds.push(f"\\Ca\\Ck{item.desc}") - else: # We should never get here assert not "is valid part" + # If the item has a description, we might just as well add it + if item.desc: + cmds.push(f"{KILL_LINE}{item.desc}") + # Finally, if we're at non-root level, tag the new container, # as it might itself be part of a container, to be processed # one level up: @@ -392,6 +567,9 @@ def do_massage( # function mimetree.walk(tree, visitor_fn=visitor_fn) + if not only_build: + cmds.push("") + # Finally, cleanup. Since we're responsible for removing the temporary # file, how's this for a little hack? try: @@ -408,15 +586,24 @@ def do_massage( if __name__ == "__main__": args = parse_cli_args() - if args.mode == "setup": - do_setup(args.extensions, debug_commands=args.debug_commands) + if args.mode is None: + do_setup( + tempdir=args.tempdir, + debug_commands=args.debug_commands, + ) elif args.mode == "massage": - with open(args.cmdpath, "w") as cmd_f: + with open(args.MAILDRAFT, "r") as draft_f, open( + args.cmdpath, "w" + ) as cmd_f: do_massage( - args.MAILDRAFT, + draft_f, + pathlib.Path(args.MAILDRAFT), cmd_f, extensions=args.extensions, + cssfile=args.css_file, + only_build=args.only_build, + tempdir=args.tempdir, debug_commands=args.debug_commands, debug_walk=args.debug_walk, ) @@ -426,6 +613,7 @@ if __name__ == "__main__": try: import pytest + from io import StringIO class Tests: @pytest.fixture @@ -531,7 +719,6 @@ try: def test_MIMETreeDFWalker_list_to_mixed(self, basic_mime_tree): mimetree = MIMETreeDFWalker() - items = [] def visitor_fn(item, stack, debugprint): @@ -552,70 +739,247 @@ try: mimetree.walk(basic_mime_tree) assert len(items) == 5 - def test_do_setup_no_extensions(self, const1, capsys): - "Assert basics about the setup command output" - do_setup(temppath=const1, out_f=sys.stdout) - captout = capsys.readouterr() - lines = captout.out.splitlines() - assert lines[2].endswith(f'{const1}"') - assert lines[4].endswith(const1) - assert "first-entry" in lines[-1] - assert "edit-file" in lines[-1] - - def test_do_setup_extensions(self, const1, const2, capsys): - "Assert that extensions are passed to editor" - do_setup( - temppath=const1, extensions=[const2, const1], out_f=sys.stdout + @pytest.fixture + def string_io(self, const1, text=None): + return StringIO(text or const1) + + def test_do_massage_basic(self, const1, string_io, capsys): + def converter(drafttext, draftpath, cssfile, extensions, tempdir): + return Part("text", "plain", draftpath, orig=True) + + do_massage( + draft_f=string_io, + draftpath=const1, + cmd_f=sys.stdout, + converter=converter, ) - captout = capsys.readouterr() - lines = captout.out.splitlines() - # assert comma-separated list of extensions passed - assert lines[2].endswith(f'{const2},{const1}"') - assert lines[4].endswith(const1) - def test_do_massage_basic(self, const1, capsys): - def converter(maildraft, extensions): - return Part("text", "plain", "/dev/null", orig=True) + captured = capsys.readouterr() + lines = captured.out.splitlines() + assert '="$my_editor"' in lines.pop(0) + assert '="$my_edit_headers"' in lines.pop(0) + assert "unset my_editor" == lines.pop(0) + assert "unset my_edit_headers" == lines.pop(0) + assert "send-message" in lines.pop(0) + assert "update-encoding" in lines.pop(0) + assert "source 'rm -f " in lines.pop(0) + assert "unset my_mdwn_postprocess_cmd_file" == lines.pop(0) + + def test_do_massage_fulltree( + self, string_io, const1, basic_mime_tree, capsys + ): + def converter(drafttext, draftpath, cssfile, extensions, tempdir): + return basic_mime_tree + + do_massage( + draft_f=string_io, + draftpath=const1, + cmd_f=sys.stdout, + converter=converter, + ) - do_massage(maildraft=const1, cmd_f=sys.stdout, converter=converter) captured = capsys.readouterr() + lines = captured.out.splitlines()[4:] + assert "send-message" in lines.pop(0) + assert "Related" in lines.pop(0) + assert "group-related" in lines.pop(0) + assert "tag-entry" in lines.pop(0) + assert "Logo" in lines.pop(0) + assert "content-id" in lines.pop(0) + assert "toggle-unlink" in lines.pop(0) + assert "logo.png" in lines.pop(0) + assert "tag-entry" in lines.pop(0) + assert "Alternative" in lines.pop(0) + assert "group-alternatives" in lines.pop(0) + assert "tag-entry" in lines.pop(0) + assert "HTML" in lines.pop(0) + assert "toggle-unlink" in lines.pop(0) + assert "part.html" in lines.pop(0) + assert "tag-entry" in lines.pop(0) + assert "Plain" in lines.pop(0) + assert "update-encoding" in lines.pop(0) + assert len(lines) == 2 + + @pytest.fixture + def fake_filewriter(self): + class FileWriter: + def __init__(self): + self._writes = [] + + def __call__(self, path, content, mode="w", **kwargs): + self._writes.append((path, content)) + + def pop(self, index=-1): + return self._writes.pop(index) + + return FileWriter() + + @pytest.fixture + def markdown_non_converter(self, const1, const2): + return lambda s, text: f"{const1}{text}{const2}" + + def test_converter_tree_basic( + self, const1, const2, fake_filewriter, markdown_non_converter + ): + path = pathlib.Path(const2) + tree = convert_markdown_to_html( + const1, path, filewriter_fn=fake_filewriter + ) + + assert tree.subtype == "alternative" + assert len(tree.children) == 2 + assert tree.children[0].subtype == "plain" + assert tree.children[0].path == path + assert tree.children[0].orig + assert tree.children[1].subtype == "html" + assert tree.children[1].path == path.with_suffix(".html") + + def test_converter_writes( + self, + const1, + const2, + fake_filewriter, + monkeypatch, + markdown_non_converter, + ): + path = pathlib.Path(const2) + + with monkeypatch.context() as m: + m.setattr(markdown.Markdown, "convert", markdown_non_converter) + convert_markdown_to_html( + const1, path, filewriter_fn=fake_filewriter + ) + + assert (path, const1) == fake_filewriter.pop(0) assert ( - captured.out.strip() - == """\ - set editor="$my_editor" - set edit_headers="$my_edit_headers" - unset my_editor - unset my_edit_headers - source 'rm -f pytest_internal_file|' - unset my_mdwn_postprocess_cmd_file - """.replace( - " ", "" - ).strip() + path.with_suffix(".html"), + markdown_non_converter(None, const1), + ) == fake_filewriter.pop(0) + + def test_markdown_inline_image_processor(self): + imgpath1 = "file:/path/to/image.png" + imgpath2 = "file:///path/to/image.png?url=params" + imgpath3 = "/path/to/image.png" + text = f"""![inline local image]({imgpath1}) + ![image inlined + with newline]({imgpath2}) + ![image local path]({imgpath3})""" + text, html, images = markdown_with_inline_image_support(text) + + # local paths have been normalised to URLs: + imgpath3 = f"file://{imgpath3}" + + assert 'src="cid:' in html + assert "](cid:" in text + assert len(images) == 3 + assert imgpath1 in images + assert imgpath2 in images + assert imgpath3 in images + assert images[imgpath1].cid != images[imgpath2].cid + assert images[imgpath1].cid != images[imgpath3].cid + assert images[imgpath2].cid != images[imgpath3].cid + + def test_markdown_inline_image_processor_title_to_desc(self, const1): + imgpath = "file:///path/to/image.png" + text = f'![inline local image]({imgpath} "{const1}")' + text, html, images = markdown_with_inline_image_support(text) + assert images[imgpath].desc == const1 + + def test_markdown_inline_image_processor_alt_to_desc(self, const1): + imgpath = "file:///path/to/image.png" + text = f"![{const1}]({imgpath})" + text, html, images = markdown_with_inline_image_support(text) + assert images[imgpath].desc == const1 + + def test_markdown_inline_image_processor_title_over_alt_desc( + self, const1, const2 + ): + imgpath = "file:///path/to/image.png" + text = f'![{const1}]({imgpath} "{const2}")' + text, html, images = markdown_with_inline_image_support(text) + assert images[imgpath].desc == const2 + + def test_markdown_inline_image_not_external(self): + imgpath = "https://path/to/image.png" + text = f"![inline image]({imgpath})" + text, html, images = markdown_with_inline_image_support(text) + + assert 'src="cid:' not in html + assert "](cid:" not in text + assert len(images) == 0 + + def test_markdown_inline_image_local_file(self): + imgpath = "/path/to/image.png" + text = f"![inline image]({imgpath})" + text, html, images = markdown_with_inline_image_support(text) + + for k, v in images.items(): + assert k == f"file://{imgpath}" + break + + @pytest.fixture + def test_png(self): + return ( + "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAE" + "AAAABCAAAAAA6fptVAAAACklEQVQI12P4DwABAQEAG7buVgAA" ) - def test_do_massage_fulltree(self, const1, basic_mime_tree, capsys): - def converter(maildraft, extensions): - return basic_mime_tree + def test_markdown_inline_image_processor_base64(self, test_png): + text = f"![1px white inlined]({test_png})" + text, html, images = markdown_with_inline_image_support(text) + + assert 'src="cid:' in html + assert "](cid:" in text + assert len(images) == 1 + assert test_png in images + + def test_converter_tree_inline_image_base64( + self, test_png, const1, fake_filewriter + ): + text = f"![inline base64 image]({test_png})" + path = pathlib.Path(const1) + tree = convert_markdown_to_html( + text, path, filewriter_fn=fake_filewriter + ) + + assert tree.subtype == "relative" + assert tree.children[1].subtype == "png" + written = fake_filewriter.pop() + assert tree.children[1].path == written[0] + assert written[1] == request.urlopen(test_png).read() + + def test_inline_image_collection( + self, test_png, const1, const2, fake_filewriter + ): + test_images = {test_png: InlineImageInfo(cid=const1, desc=const2)} + relparts = collect_inline_images( + test_images, filewriter_fn=fake_filewriter + ) + + written = fake_filewriter.pop() + assert b"PNG" in written[1] + + assert relparts[0].subtype == "png" + assert relparts[0].path == written[0] + assert relparts[0].cid == const1 + assert relparts[0].desc.endswith(const2) + + def test_apply_stylesheet(self): + if _PYNLINER: + html = "

Hello, world!

" + css = "p { color:red }" + out = apply_styling(html, css) + assert 'p style="color' in out + + def test_apply_stylesheet_pygments(self): + if _PYGMENTS_CSS: + html = ( + f'
' + "
def foo():\n    return
" + ) + out = apply_styling(html, _PYGMENTS_CSS) + assert f'{_CODEHILITE_CLASS}" style="' in out - do_massage(maildraft=const1, cmd_f=sys.stdout, converter=converter) - captured = capsys.readouterr() - lines = captured.out.splitlines()[4:][::-1] - assert "Related" in lines.pop() - assert "group-related" in lines.pop() - assert "tag-entry" in lines.pop() - assert "Logo" in lines.pop() - assert "content-id" in lines.pop() - assert "toggle-unlink" in lines.pop() - assert "logo.png" in lines.pop() - assert "tag-entry" in lines.pop() - assert "Alternative" in lines.pop() - assert "group-alternatives" in lines.pop() - assert "tag-entry" in lines.pop() - assert "HTML" in lines.pop() - assert "toggle-unlink" in lines.pop() - assert "part.html" in lines.pop() - assert "tag-entry" in lines.pop() - assert "Plain" in lines.pop() except ImportError: pass