sniff: add --quote option

which complements --delimiter option to help sniff work with "unusually" formatted csv files

src/cmd/sniff.rs

@@ -59,6 +59,14 @@ sniff options:
  [default: 1000]
  --prefer-dmy Prefer to parse dates in dmy format. Otherwise, use mdy format.
  Ignored when --no-infer is enabled.
+ -d, --delimiter <arg> The field delimiter for reading CSV data.
+ Specify this when the delimiter is known beforehand,
+ as the delimiter inferencing algorithm can sometimes fail.
+ Must be a single ascii character.
+ -q, --quote <arg> The quote character for reading CSV data.
+ Specify this when the quote character is known beforehand,
+ as the quote char inferencing algorithm can sometimes fail.
+ Must be a single ascii character.
  --json Return results in JSON format.
  --pretty-json Return results in pretty JSON format.
  --save-urlsample <file> Save the URL sample to a file.
@@ -85,11 +93,6 @@ sniff options:
 
 Common options:
  -h, --help Display this message
- -d, --delimiter <arg> The field delimiter for reading CSV data.
- Specify this when the delimiter is known beforehand,
- as the delimiter guessing algorithm can sometimes be
- wrong if not enough delimiters are present in the sample.
- Must be a single ascii character.
  -p, --progressbar Show progress bars. Only valid for URL input.
 "#;
 
@@ -129,6 +132,7 @@ struct Args {
  flag_save_urlsample: Option<String>,
  flag_pretty_json: bool,
  flag_delimiter: Option<Delimiter>,
+ flag_quote: Option<char>,
  flag_progressbar: bool,
  flag_timeout: u16,
  flag_user_agent: Option<String>,
@@ -953,13 +957,21 @@ async fn sniff_main(mut args: Args) -> CliResult<()> {
  fs::copy(sfile_info.file_to_sniff.clone(), save_urlsample)?;
  }
 
+ let quote_char = match args.flag_quote {
+ Some(quote_char) => {
+ qsv_sniffer::metadata::Quote::Some(*quote_char.to_string().as_bytes().first().unwrap())
+ }
+ _ => qsv_sniffer::metadata::Quote::None,
+ };
+
  let sniff_results = if sample_all {
  log::info!("Sniffing ALL rows...");
  if let Some(delimiter) = args.flag_delimiter {
  Sniffer::new()
  .sample_size(SampleSize::All)
  .date_preference(dt_preference)
  .delimiter(delimiter.as_byte())
+ .quote(quote_char)
  .sniff_reader(rdr.into_inner())
  } else {
  Sniffer::new()
@@ -979,6 +991,7 @@ async fn sniff_main(mut args: Args) -> CliResult<()> {
  .sample_size(SampleSize::Records(sniff_size))
  .date_preference(dt_preference)
  .delimiter(delimiter.as_byte())
+ .quote(quote_char)
  .sniff_reader(rdr.into_inner())
  } else {
  Sniffer::new()