/**
* Creates a document converter.
*
* @param exe_path The full path to the <code>ebook-convert</code> executable. (Uses {@link
* #findEbookConvert()} if an empty string or <code>null</code> .)
* @param output_profile The argument for the <code>
* <a href="http://manual.calibre-ebook.com/cli/ebook-convert.html#cmdoption-ebook-convert--output-profile">--output-profile</a>
* </code> argument (e.g. “<code>nook</code>”). Use <code>null</code> or an empty
* string to not include.
* @param author The author for the article (see <code>
* <a href="http://manual.calibre-ebook.com/cli/ebook-convert.html#cmdoption-ebook-convert--authors">--authors</a>
* </code> option.) Use <code>null</code> or an empty string to not include.
* @param other_options Extra command line options to be passed to <code>ebook-convert</code> when
* converting a document. See the <a href=
* "http://manual.calibre-ebook.com/cli/ebook-convert.html" >Calibre User Manual</a> for
* documentation on the <code>calibredb add</code> command and options.
*/
public EbookConverter(
final String exe_path,
final String output_profile,
final String author,
final List<String> other_options) {
if (Str.isNotEmpty(exe_path)) this.exePath = exe_path;
else this.exePath = findEbookConvert();
final ImmutableList.Builder<String> bldr = ImmutableList.builder();
if (Str.isNotEmpty(output_profile)) bldr.add("--output-profile=" + output_profile);
if (Str.isNotEmpty(author)) bldr.add("--authors=" + author);
if (other_options != null) bldr.addAll(other_options);
this.options = bldr.build();
}
/**
* Converts a document (usually HTML) to another format (e.g. epub or mobi) using <code>
* ebook-convert</code>.
*
* @param title An optional title (use an empty string or <code>null</code> for unspecified or to
* use whatever is in the <code>file</code> (if anything).) See <code><a href=
* "http://manual.calibre-ebook.com/cli/ebook-convert.html#cmdoption-ebook-convert--title"
* >--title</a></code> in the Calibre documentation.
* @param in_file The file to be converted.
* @param out_file The target file.
* @param summary An optional summary of the contents of the document, in HTML (use an empty
* string or <code>null</code> for unspecified or to use whatever is in the <code>file</code>
* (if anything).) See <code><a href=
* "http://manual.calibre-ebook.com/cli/ebook-convert.html#cmdoption-ebook-convert--comments"
* >--comments</a></code> in the Calibre documentation.
* @throws IOException
*/
public void convert(
final String title, final File in_file, final File out_file, final String summary)
throws IOException {
final List<String> cmd = Colls.newArrayList(10);
cmd.add(exePath);
cmd.add(in_file.toString());
cmd.add(out_file.toString());
if (Str.isNotEmpty(title)) cmd.add("--title=" + title);
if (Str.isNotEmpty(summary)) cmd.add("--comments=" + summary);
cmd.addAll(options);
log.debug("Running: {}", Str.join(", ", cmd));
final Process proc = new ProcessBuilder(cmd).redirectErrorStream(true).start();
final ProcessOutputSlurper slurper = new ProcessOutputSlurper(proc);
final int ret;
try {
ret = proc.waitFor();
} catch (InterruptedException ex) {
throw new UnhandledException(ex);
}
final List<String> output = slurper.getLines();
if (ret != 0) log.trace("ebook-convert returned {}", ret);
log.trace("ebook-convert output:");
for (String line : output) log.trace(line);
if (ret == 0) {
final Pattern pat = Pattern.compile("\\S+ output written to .+$");
for (String line : output) if (pat.matcher(line).matches()) return;
}
throw new IOException("Error converting document. See log file for details.");
}