src/hastyscribe.nim
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import std/[ macros, os, parseopt, strutils, times, pegs, xmltree, tables, httpclient, logging, critbits, ] from nimquery import querySelectorAll from std/htmlparser import parseHtml from std/sequtils import mapIt import hastyscribepkg/niftylogger, hastyscribepkg/markdown, hastyscribepkg/config, hastyscribepkg/consts, hastyscribepkg/utils export consts when defined(windows) and defined(amd64): {.passL: "-static -L"&getProjectPath()&"/hastyscribepkg/vendor/markdown/windows -lmarkdown".} elif defined(linux) and defined(amd64): {.passL: "-static -L"&getProjectPath()&"/hastyscribepkg/vendor/markdown/linux -lmarkdown".} elif defined(macosx) and defined(amd64): {.passL: "-Bstatic -L"&getProjectPath()&"/hastyscribepkg/vendor/markdown/macosx -lmarkdown -Bdynamic".} type HastyOptions* = object toc*: bool = true input*: string = "" output*: string = "" css*: string = "" js*: string = "" watermark*: string fragment*: bool = false embed*: bool = true iso*: bool = false noclobber*: bool = false outputToDir*: bool = false processingMultiple: bool = false HastyFields* = Table[string, string] HastySnippets* = Table[string, string] HastyMacros* = Table[string, string] HastyLinkStyles* = Table[string, string] HastyIconStyles* = Table[string, string] HastyNoteStyles* = Table[string, string] HastyBadgeStyles* = Table[string, string] HastyScribe* = object options: HastyOptions fields: HastyFields snippets: HastySnippets macros: HastyMacros document: string linkStyles: HastyLinkStyles iconStyles: HastyIconStyles noteStyles: HastyNoteStyles badgeStyles: HastyBadgeStyles if logging.getHandlers().len == 0: newNiftyLogger().addHandler() proc initFields(fields: HastyFields): HastyFields {.gcsafe.} = result = initTable[string, string]() for key, value in fields.pairs: result[key] = value var now = getTime().local() result["timestamp"] = $now.toTime.toUnix().int result["date"] = now.format("yyyy-MM-dd") result["full-date"] = now.format("dddd, MMMM d, yyyy") result["long-date"] = now.format("MMMM d, yyyy") result["medium-date"] = now.format("MMM d, yyyy") result["short-date"] = now.format("M/d/yy") result["short-time-24"] = now.format("HH:mm") result["short-time"] = now.format("HH:mm tt") result["time-24"] = now.format("HH:mm:ss") result["time"] = now.format("HH:mm:ss tt") result["day"] = now.format("dd") result["month"] = now.format("MM") result["year"] = now.format("yyyy") result["short-day"] = now.format("d") result["short-month"] = now.format("M") result["short-year"] = now.format("yy") result["weekday"] = now.format("dddd") result["weekday-abbr"] = now.format("dd") result["month-name"] = now.format("MMMM") result["month-name-abbr"] = now.format("MMM") result["timezone-offset"] = now.format("zzz") proc newHastyScribe*(options: HastyOptions, fields: HastyFields): HastyScribe = return HastyScribe(options: options, fields: initFields(fields), snippets: initTable[string, string](), macros: initTable[string, string](), document: "") # Utility Procedures proc embed_images(hs: var HastyScribe, dir: string) = let peg_img = peg""" image <- '<img' \s+ 'src=' ["] {file} ["] file <- [^"]+ """ var current_dir:string if dir.len == 0: current_dir = "" else: current_dir = dir & "/" type TImgTagStart = array[0..0, string] var doc = hs.document for img in findAll(hs.document, peg_img): var matches:TImgTagStart discard img.match(peg_img, matches) let imgfile = matches[0] var imgformat = imgfile.image_format if imgformat == "svg": imgformat = "svg+xml" var imgcontent = "" if imgfile.startsWith(peg"'data:'"): continue elif imgfile.startsWith(peg"'http' 's'? '://'"): try: let client = newHttpClient() imgcontent = encode_image(client.getContent(imgfile), imgformat) except CatchableError as e: warn "Unable to download '$1'\n Reason: $2\n" % [imgfile, e.msg] & " -> Image will be linked instead" continue else: imgcontent = encode_image_file(current_dir & imgfile, imgformat) let imgrep = img.replace("\"" & img_file & "\"", "\"" & imgcontent & "\"") doc = doc.replace(img, imgrep) hs.document = doc proc preprocess*(hs: var HastyScribe, document, dir: string, offset = 0): string proc applyHeadingOffset(contents: string, offset: int): string = if offset == 0: return contents let peg_heading = peg"""heading <- (^ / \n){'#'+}""" var handleHeading = proc (index: int, count: int, matches: openArray[string]): string = let heading = matches[0] result = "\n" & "#".repeat(heading.len + offset) return contents.replace(peg_heading, handleHeading) # Transclusion with heading offset: # {@ some/file.md || 1 @} proc parse_transclusions(hs: var HastyScribe, document: string, dir = "", offset = 0): string = result = document.applyHeadingOffset(offset) let peg_transclusion = peg""" transclusion <- '{\@' \s* {path} \s* '||' \s* {offset} \s* '\@}' path <- [^|]+ offset <- [0-5] """ var cwd = dir if cwd != "": cwd = cwd & "/" for transclusion in document.findAll(peg_transclusion): var matches: array[0..1, string] discard transclusion.match(peg_transclusion, matches) let path = cwd & matches[0].strip let value = matches[1].strip let offset = value.split("||")[0].parseInt() + offset if path.fileExists(): let fileInfo = path.splitFile() var contents, s = "" var delimiter = 0 var f:File discard f.open(path) # Ignore headers try: discard f.readLine(s) if not s.startsWith("----"): delimiter = 2 contents &= s&"\n" else: delimiter = 1 while f.readLine(s): if delimiter >= 2: contents &= s&"\n" else: if s.startsWith("----"): delimiter.inc except CatchableError: discard f.close() result = result.replace(transclusion, hs.parse_transclusions(contents, fileInfo.dir, offset)) else: warn "File '$1' not found" % [path] result = result.replace(transclusion, "") # Macro Definition: # {#test -> This is a $1} # # Macro Usage: # {#test||simple test} proc parse_macros(hs: var HastyScribe, document: string): string = let peg_macro_def = peg""" definition <- '{#' \s* {id} \s* deftype {@} '#}' deftype <- '->' / '=>' id <- [a-zA-Z0-9_-]+ """ let peg_macro_instance = peg""" instance <- "{#" \s* {id} \s* "||" \s* {@} "#}" id <- [a-zA-Z0-9_-]+ """ result = document for def in document.findAll(peg_macro_def): var matches: array[0..1, string] discard def.match(peg_macro_def, matches) let id = matches[0].strip let value = matches[1].strip hs.macros[id] = value result = result.replace(def, "") for instance in findAll(result, peg_macro_instance): var matches: array[0..1, string] discard instance.match(peg_macro_instance, matches) let id = matches[0].strip let value = matches[1].strip let params = value.split("||") if hs.macros.hasKey(id): try: result = result.replace(instance, hs.macros[id] % params) except CatchableError: warn "Incorrect number of parameters specified for macro '$1'\n -> Instance: $2" % [id, instance] else: warn "Macro '" & id & "' not defined." result = result.replace(instance, "") # Field Usage: # {{$timestamp}} proc parse_fields(hs: var HastyScribe, document: string): string {.gcsafe.} = let peg_field = peg""" field <- '{{' \s* '$' {id} \s* '}}' id <- [a-zA-Z0-9_-]+ """ result = document for field in document.findAll(peg_field): var matches:array[0..0, string] discard field.match(peg_field, matches) var id = matches[0].strip if hs.fields.hasKey(id): result = result.replace(field, hs.fields[id]) else: warn "Field '" & id & "' not defined." result = result.replace(field, "") proc load_styles(hs: var HastyScribe) = type StyleRuleMatches = array[0..1, string] # Icons let peg_iconstyle_def = peg""" definition <- { '.' {icon} ':before' \s* '{' @ (\n / $) } icon <- 'fa-' [a-z0-9-]+ """ for def in stylesheet_icons.findAll(peg_iconstyle_def): var matches: StyleRuleMatches discard def.match(peg_iconstyle_def, matches) hs.iconStyles[matches[1].strip] = matches[0].strip # Badges let peg_badgestyle_def = peg""" definition <- { '.' {badge} ':before' \s* '{' @ (\n / $) } badge <- 'badge-' [a-z0-9-]+ """ for def in stylesheet_badges.findAll(peg_badgestyle_def): var matches: StyleRuleMatches discard def.match(peg_badgestyle_def, matches) hs.badgeStyles[matches[1].strip] = matches[0].strip # Notes let peg_notestyle_def = peg""" definition <- { '.' {note} \s* '> p:first-child:before {' \s* @ (\n / $) } note <- [a-z]+ """ for def in stylesheet_notes.findAll(peg_notestyle_def): var matches: StyleRuleMatches discard def.match(peg_notestyle_def, matches) hs.noteStyles[matches[1].strip] = matches[0].strip # Links let peg_linkstyle_def = peg""" definition <- { 'a[href' { ('^=' / '*=' / '$=') '\'' link } '\']:before' \s* @ (\n / $) } link <- [a-z0-9-.#]+ """ for def in stylesheet_links.findAll(peg_linkstyle_def): var matches: StyleRuleMatches discard def.match(peg_linkstyle_def, matches) hs.linkStyles[matches[1].strip] = matches[0].strip # Snippet Definition: # {{test -> My test snippet}} # # Snippet Usage: # {{test}} proc parse_snippets(hs: var HastyScribe, document: string): string = let peg_snippet_def = peg""" definition <- '{{' \s* {id} \s* {deftype} {@} '}}' deftype <- '->' / '=>' id <- [a-zA-Z0-9_-]+ """ let peg_snippet = peg""" snippet <- '{{' \s* {id} \s* '}}' id <- [a-zA-Z0-9_-]+ """ type TSnippetDef = array[0..2, string] TSnippet = array[0..0, string] result = document for def in document.findAll(peg_snippet_def): var matches:TSnippetDef discard def.match(peg_snippet_def, matches) var id = matches[0].strip var value = matches[2].strip(true, false) hs.snippets[id] = value if matches[1] == "=>": value = "" result = result.replace(def, value) for snippet in document.findAll(peg_snippet): var matches:TSnippet discard snippet.match(peg_snippet, matches) var id = matches[0].strip if hs.snippets.hasKey(id): result = result.replace(snippet, hs.snippets[id]) else: warn "Snippet '" & id & "' not defined." result = result.replace(snippet, "") proc remove_escapes(hs: var HastyScribe, document: string): string = ## Substitute escaped brackets or hashes *after* preprocessing document.replacef(peg"'\\' {'{' / '}' / '#'}", "$1") proc parse_anchors(hs: var HastyScribe, document: string): string = let peg_anchor = peg""" anchor <- \s '#' {id} '#' id <- [a-zA-Z][a-zA-Z0-9:._-]+ """ document.replacef(peg_anchor, """ <a id="$1"></a>""") proc preprocess*(hs: var HastyScribe, document, dir: string, offset = 0): string = result = hs.parse_transclusions(document, dir, offset) result = hs.parse_fields(result) result = hs.parse_snippets(result) result = hs.parse_macros(result) result = hs.parse_anchors(result) result = hs.remove_escapes(result) proc getTableValue(table: Table[string, string], key: string, obj: string): string = try: return table[key] except CatchableError: warn obj & " not found: " & key proc create_optional_css*(hs: HastyScribe, document: string): string = let html = document.parseHtml() var rules: seq[string] # Check icons for icon in html.querySelectorAll("span[class^=fa-]"): rules.add getTableValue(hs.iconStyles, icon.attr("class"), "Icon") # Check badges for badge in html.querySelectorAll("span[class^=badge-]"): rules.add getTableValue(hs.badgeStyles, badge.attr("class"), "Badge") # Check notes for note in html.querySelectorAll("div.tip, div.warning, div.note, div.sidebar"): rules.add getTableValue(hs.noteStyles, note.attr("class"), "Note") # Check links let linkHrefs = html.querySelectorAll("a[href]").mapIt(it.attr("href")) var linkRulesSet: CritBitTree[void] # Add #document-top rule because it is always needed and added at the end. rules.add hs.linkStyles["^='#document-top"] for href in linkHrefs: for (key, val) in hs.linkStyles.pairs: if val notin linkRulesSet: let op = key[0..1] let value = key[3..^1] # Skip first ' # TODO: debug logic # Save matches in order of priority (?) if (op == "$=" and href.endsWith(value)) or (op == "*=" and href.contains(value)) or (op == "^=" and href.startsWith(value)): linkRulesSet.incl val rules.add val break rules.join("\n").style_tag() # Public API proc compileFragment*(hs: var HastyScribe, input, dir: string, toc = false): string {.discardable.} = hs.document = input # Parse transclusions, fields, snippets, and macros hs.document = hs.preprocess(hs.document, dir) # Process markdown var flags = MKD_EXTRA_FOOTNOTE or MKD_NOHEADER or MKD_DLEXTRA or MKD_FENCEDCODE or MKD_GITHUBTAGS or MKD_URLENCODEDANCHOR if toc: flags = flags or MKD_TOC hs.document = hs.document.md(flags) return hs.document proc compileDocument*(hs: var HastyScribe, input, dir: string): string {.discardable.} = hs.document = input # Load style rules to be included on-demand hs.load_styles() # Parse transclusions, fields, snippets, and macros hs.document = hs.preprocess(hs.document, dir) # Process markdown var metadata: TMDMetaData hs.document = hs.document.md(0, metadata) # Document Variables const hastyscribe_img = """ <img src="$#" width="80" height="23" alt="HastyScribe"> """ % encode_image(hastyscribe_logo, "svg") let (headings, toc) = if hs.options.toc and metadata.toc != "": (" class=\"headings\"", "<div id=\"toc\">" & metadata.toc & "</div>") else: ("", "") user_css_tag = if hs.options.css == "": "" else: hs.options.css.readFile.style_tag user_js_tag = if hs.options.js == "": "" else: "<script type=\"text/javascript\">\n" & hs.options.js.readFile & "\n</script>" watermark_css_tag = if hs.options.watermark == "": "" else: watermark_css(hs.options.watermark) # Manage metadata author_footer = if metadata.author == "": "" else: "<span class=\"copy\"></span> " & metadata.author & " –" title_tag = if metadata.title == "": "" else: "<title>" & metadata.title & "</title>" header_tag = if metadata.title == "": "" else: "<div id=\"header\"><h1>" & metadata.title & "</h1></div>" (main_css_tag, optional_css_tag) = if hs.options.embed: (stylesheet.style_tag, hs.create_optional_css(hs.document)) else: ("", "") # Date parsing and validation let date: string = block: const IsoDate = initTimeFormat("yyyy-MM-dd") const DefaultDate = initTimeFormat("MMMM d, yyyy") let timeinfo: DateTime = try: parse(metadata.date, IsoDate) except CatchableError: local(getTime()) timeinfo.format(if hs.options.iso: IsoDate else: DefaultDate) hs.document = """<!doctype html> <html lang="en"> <head> $title_tag <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="author" content="$author"> <meta name="generator" content="HastyScribe"> $main_css_tag $optional_css_tag $user_css_tag $internal_css_tag $watermark_css_tag </head> <body$headings> <div id="container"> <a id="document-top"></a> $header_tag $toc <div id="main"> $body </div> <div id="footer"> <p>$author_footer $date</p> <p><span>Powered by</span> <a href="https://h3rald.com/hastyscribe" class="hastyscribe-logo">$hastyscribe_img</a></p> </div> </div> $js </body>""" % [ "title_tag", title_tag, "header_tag", header_tag, "author", metadata.author, "author_footer", author_footer, "date", date, "toc", toc, "main_css_tag", main_css_tag, "hastyscribe_img", hastyscribe_img, "optional_css_tag", optional_css_tag, "user_css_tag", user_css_tag, "headings", headings, "body", hs.document, "internal_css_tag", metadata.css, "watermark_css_tag", watermark_css_tag, "js", user_js_tag] if hs.options.embed: hs.embed_images(dir) hs.document = add_jump_to_top_links(hs.document) # Use IDs instead of names for anchors hs.document = hs.document.replace("<a name=", "<a id=") return hs.document type ClobberError = object of CatchableError proc compile(hs: var HastyScribe; input_file, out_basename: string) {.raises: [IOError, ref ValueError, OSError, Exception, ClobberError].} = const OutputExt = ".htm" let (dir, name, _) = input_file.splitFile() input: string = input_file.readFile() outBaseName = if out_basename != "": out_basename else: name outputPath: string = if hs.options.output == "": dir/outBaseName & OutputExt else: if hs.options.outputToDir: # explicit name is a dir hs.options.output / outBaseName & OutputExt else: # explicit name is a file path hs.options.output if hs.options.fragment: hs.compileFragment(input, dir) else: hs.compileDocument(input, dir) if outputPath == "-": stdout.write(hs.document) if hs.options.processingMultiple: stdout.write("\n" & (eof_separator % ["name", name]) & "\n") else: if fileExists(outputPath) and hs.options.noclobber: raise newException(ClobberError, outputPath) else: # TODO: implement atomic writes with temp files outputPath.writeFile(hs.document) proc compile*(hs: var HastyScribe, input_file: string) {.raises: [IOError, ref ValueError, OSError, Exception, ClobberError].} = compile(hs, input_file, "") proc fileNameMappings(paths: sink CritBitTree[void]): seq[tuple[path, name: string]] = ## This function preemptively deals with potential name collisions on ## writing multiple files to a flat output directory ## Outputs a mapping of file paths to their unique base names var baseNameSet: CritBitTree[(int, bool)] # (indexInMap, madeUnique) var i = 0 for path in paths: let (dir, name, _) = path.splitFile() if baseNameSet.containsOrIncl(name, (i, false)): let (oldIdx, madeUnique) = baseNameSet[name] if not madeUnique: # First collision, make both old and new files unique let oldMap = result[oldIdx] let newName = makeFNameUnique(oldMap.name, oldMap.path.splitFile.dir) result[oldIdx] = (path: oldMap.path, name: newName) baseNameSet[name] = (oldIdx, true) # Subsequent name collisions, make only the new name unique result.add (path: path, name: makeFNameUnique(name, dir)) else: baseNameSet.incl(name, (i, false)) result.add (path: path, name: name) i.inc() ### MAIN when isMainModule: const usage = " HastyScribe v" & pkgVersion & " - Self-contained Markdown Compiler" & """ (c) 2013-2023 Fabio Cevasco Usage: hastyscribe [options] <markdown_file_or_glob> ... Arguments: markdown_file_or_glob The markdown (or glob expression) file to compile into HTML. Options: --output-file=<file> Write output to <file>. (Use "--output-file=-" to output to stdout) --output-dir=<dir>, -d=<dir> Write output files to <dir>. Overrides "output-file". Input directory structure is not preserved. --field/<field>=<value> Define a new field called <field> with value <value>. --user-css=<file> Insert contents of <file> as a CSS stylesheet. --user-js=<file> Insert contents of <file> as a Javascript script. --watermark=<file> Use the image in <file> as a watermark. --notoc Do not generate a Table of Contents. --noembed If specified, styles and images will not be embedded. --fragment If specified, an HTML fragment will be generated, without embedding images or stylesheets. --iso Use ISO 8601 date format (e.g., 2000-12-31) in the footer. --no-clobber, -n Do not overwrite existing files. --help, -h Display the usage information. --version, -v Print version and exit.""" type ErrorKinds = enum errENOENT = 2, errEIO = 5 var inputs: seq[string] options = default(HastyOptions) fields = initTable[string, string]() # Parse Parameters template noVal() = if val != "": fatal "Option '" & key & "' takes no value"; quit(1) for kind, key, val in getopt(): case kind of cmdArgument: inputs.add(key) of cmdShortOption, cmdLongOption: case key of "notoc": noVal() options.toc = false of "noembed": noVal() options.embed = false of "user-css": options.css = val of "user-js": options.js = val of "watermark": options.watermark = val of "output-file": if not options.outputToDir: if val == "": fatal "Output file path can't be empty"; quit(1) options.output = val of "d", "output-dir": options.outputToDir = true if dirExists(val): options.output = val.normalizedPath() else: fatal "Directory '" & val & "' does not exist"; quit(errENOENT.ord) of "fragment": noVal() options.fragment = true of "iso": noVal() options.iso = true of "n", "no-clobber", "noclobber": noVal() options.noclobber = true of "v", "version": echo pkgVersion quit(0) of "h", "help": echo usage quit(0) else: if key.startsWith("field/"): let val = val fields[key.replace("field/", "")] = val else: warn """Unknown option "$#", ignoring""" % key of cmdEnd: assert(false) if inputs.len == 0: echo usage quit(0) else: var errorsOccurred: set[ErrorKinds] = {} var paths: CritBitTree[void] # Deduplicates different globs expanding to same files for glob in inputs: var globMatchCount = 0 for file in walkFiles(glob): # TODO: files can still contain relative and absolute paths pointing to the same file let path = file.normalizedPath() if paths.containsOrIncl(path): notice "Input file \"$1\" provided multiple times" % path globMatchCount.inc() if globMatchCount == 0: errorsOccurred.incl errENOENT fatal "\"$1\" does not match any file" % glob if paths.len == 0: errorsOccurred.incl errENOENT else: var fileMappings: seq[tuple[path, name: string]] if paths.len > 1: options.processingMultiple = true if not options.outputToDir: case options.output: of "": discard of "-": notice "Multiple files will be printed to stdout using the\n" & " \"" & eof_Separator & "\" separator." else: warn "Option `output-file` is set but multiple input files given, ignoring" options.output = "" fileMappings = fileNameMappings(paths) else: for p in paths.keys: fileMappings.add (path: p, name: "") var hs = newHastyScribe(options, fields) for (path, outName) in fileMappings: try: hs.compile(path, outName) except IOError as e: errorsOccurred.incl errEIO fatal e.msg continue except ClobberError as e: warn "File '" & e.msg & "' exists, not overwriting" continue info "\"$1\" converted successfully" % path if errENOENT in errorsOccurred: quit(errENOENT.ord) elif errEIO in errorsOccurred: quit(errEIO.ord) else: discard # ok |