78 lines
2.6 KiB
JavaScript
Executable File
78 lines
2.6 KiB
JavaScript
Executable File
#!/usr/local/bin/node
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/***
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* Pandoc-style markdown preprocessor that drops extra directives
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* included for running doc code, and that optionally, when
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* --highlight is provided, replaces code blocks that are Rust code
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* with highlighted HTML blocks. The directives recognized are:
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*
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* '## ignore' tells the test extractor (extract-tests.js) to ignore
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* the block completely.
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* '## notrust' makes the test extractor ignore the block, makes
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* this script not highlight the block.
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* '# [any text]' is a line that is stripped out by this script, and
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* converted to a normal line of code (without the leading #) by
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* the test extractor.
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*/
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var fs = require("fs");
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CodeMirror = require("./lib/codemirror-node");
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require("./lib/codemirror-rust");
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function help() {
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console.log("usage: " + process.argv[0] + " [--highlight] [-o outfile] [infile]");
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process.exit(1);
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}
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var highlight = false, infile, outfile;
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for (var i = 2; i < process.argv.length; ++i) {
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var arg = process.argv[i];
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if (arg == "--highlight") highlight = true;
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else if (arg == "-o" && outfile == null && ++i < process.argv.length) outfile = process.argv[i];
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else if (arg[0] != "-") infile = arg;
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else help();
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}
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var lines = fs.readFileSync(infile || "/dev/stdin").toString().split(/\n\r?/g), cur = 0, line;
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var out = outfile ? fs.createWriteStream(outfile) : process.stdout;
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while ((line = lines[cur++]) != null) {
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if (/^~~~/.test(line)) {
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var block = "", bline;
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var notRust =
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/notrust/.test(line)
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// These are all used by the language ref to indicate things
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// that are not Rust source code
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|| /ebnf/.test(line)
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|| /abnf/.test(line)
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|| /keyword/.test(line)
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|| /field/.test(line)
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|| /precedence/.test(line);
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var isRust = !notRust;
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while ((bline = lines[cur++]) != null) {
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if (/^~~~/.test(bline)) break;
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if (!/^\s*##? /.test(bline)) block += bline + "\n";
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}
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if (!highlight || !isRust)
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out.write(line + "\n" + block + bline + "\n");
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else {
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var html = '<pre class="cm-s-default">', curstr = "", curstyle = null;
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function add(str, style) {
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if (style != curstyle) {
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if (curstyle) html +=
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'<span class="cm-' + CodeMirror.htmlEscape(curstyle) + '">' +
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CodeMirror.htmlEscape(curstr) + "</span>";
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else if (curstr) html += CodeMirror.htmlEscape(curstr);
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curstr = str; curstyle = style;
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} else curstr += str;
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}
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CodeMirror.runMode(block, "rust", add);
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add("", "bogus"); // Flush pending string.
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out.write(html + "</pre>\n");
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}
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} else {
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out.write(line + "\n");
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}
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}
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