# SmarterCSV 1.x Change Log

## 1.11.1 (2024-07-05)
  * improved behavior of Writer class
  * added SmarterCSV.generate shortcut for CSV writing
    
## 1.11.0 (2024-07-02)
  * added SmarterCSV::Writer to output CSV files ([issue #44](https://github.com/tilo/smarter_csv/issues/44))
  
## 1.10.3 (2024-03-10)
  * fixed issue when frozen options are handed in (thanks to Daniel Pepper)
  * cleaned-up rspec tests (thanks to Daniel Pepper)
  * fixed link in README (issue #251)

## 1.10.2 (2024-02-11)
  * improve error message for missing keys

## 1.10.1 (2024-01-07)
  * fix incorrect warning about UTF-8 (issue #268, thanks hirowatari)

## 1.10.0 (2023-12-31) ⚡ BREAKING ⚡

  * BREAKING CHANGES:
    
    Changed behavior:
     + when `user_provided_headers` are provided:
       * if they are not unique, an exception will now be raised
       * they are taken "as is", no header transformations can be applied
       * when they are given as strings or as symbols, it is assumed that this is the desired format
       * the value of the `strings_as_keys` options will be ignored
         
     + option `duplicate_header_suffix` now defaults to `''` instead of `nil`.
       * this allows automatic disambiguation when processing of CSV files with duplicate headers, by appending a number
       * explicitly set this option to `nil` to get the behavior from previous versions.

  * performance and memory improvements
  * code refactor

## 1.9.3 (2023-12-16)
  * raise SmarterCSV::IncorrectOption when `user_provided_headers` are empty
  * code refactor / no functional changes
  * added test cases

## 1.9.2 (2023-11-12)
  * fixed bug with '\\' at end of line (issue #252, thanks to averycrespi-moz)
  * fixed require statements (issue #249, thanks to PikachuEXE, courtsimas)
    
## 1.9.1 (2023-10-30) (YANKED)
  * yanked
  * no functional changes
  * refactored directory structure
  * re-added JRuby and TruffleRuby to CI tests
  * no C-accelleration for JRuby
  * refactored options parsing
  * code coverage / rubocop

## 1.9.0 (2023-09-04)
  * fixed issue #139

  * Error `SmarterCSV::MissingHeaders` was renamed to `SmarterCSV::MissingKeys`
    
  * CHANGED BEHAVIOR:
    When `key_mapping` option is used. (issue #139)
    Previous versions just printed an error message when a CSV header was missing during key mapping.
    Versions >= 1.9 will throw `SmarterCSV::MissingHeaders` listing all headers that were missing during mapping.

  * Notable details for `key_mapping` and `required_headers`:

    * `key_mapping` is applied to the headers early on during `SmarterCSV.process`, and raises an error if a header in the input CSV file is missing, and we can not map that header to its desired name.

    Mapping errors can be surpressed by using:
    * `silence_missing_keys` set to `true`, which silence all such errors, making all headers for mapping optional.
    * `silence_missing_keys` given an Array with the specific header keys that are optional
    The use case is that some header fields are optional, but we still want them renamed if they are present.

    * `required_headers` checks which headers are present **after** `key_mapping` was applied.

## 1.8.5 (2023-06-25)
  * fix parsing of escaped quote characters (thanks to JP Camara)
    
## 1.8.4 (2023-04-01)
  * fix gem loading issue (issue #232, #234)
  
## 1.8.3 (2023-03-30)
  * bugfix: windows one-column files were raising NoColSepDetected (issue #229)
    

## 1.8.2 (2023-03-21)
  * bugfix: do not raise `NoColSepDetected` for CSV files with only one column in most cases (issue #222)
            If the first lines contain non-ASCII characters, and no col_sep is detected, it will still raise `NoColSepDetected`

## 1.8.1 (2023-03-19)
  * added validation against invalid values for :col_sep, :row_sep, :quote_char (issue #216)
  * deprecating `required_headers` and replace with `required_keys` (issue #140)
  * fixed issue with require statement

## 1.8.0 (2023-03-18) BREAKING
  * NEW DEFAULTS: `col_sep: :auto`, `row_sep: :auto`. Fully automatic detection by default.
    
    MAKE SURE to rescue `NoColSepDetected` if your CSV files can have unexpected formats, 
              e.g. from users uploading them to a service, and handle those cases.

  * ignore Byte Order Marker (BOM) in first line in file (issues #27, #219)

## 1.7.4 (2023-01-13)
  * improved guessing of the column separator, thanks to Alessandro Fazzi

## 1.7.3 (2022-12-05)
  * new option :silence_missing_keys; if set to true, it ignores missing keys in `key_mapping`

## 1.7.2 (2022-08-29)
  * new option :with_line_numbers; if set to true, it adds :csv_line_number to each data hash (issue #130)
  
## 1.7.1 (2022-07-31)
  * bugfix for issue #195 #197 #200 which only appeared when called from Rails (thanks to Viacheslav Markin, Nicolas Rodriguez)

## 1.7.0 (2022-06-26) (replaced by 1.7.1)
  * added native code to accellerate line parsing by >10x over 1.6.0
  * added option `acceleration`, defaulting to `true`, to enable native code.
    Disable this option to use the ruby code for line parsing.
  * increased test coverage to 100%
  * rubocop changes

## 1.7.0.pre5 (2022-06-20)
  * fixed compiling
  * rubocop changes
  * published pre-release 

## 1.7.0.pre1 (2022-05-23)
  * added native code to accellerate line parsing by >10x over 1.6.0
  * added option `acceleration`, defaulting to `true`, to enable native code.
    Disable this option to use the ruby code for line parsing.
  * increased test coverage to 100%

## 1.6.1 (2022-05-06)
  * unused keys in `key_mapping` now generate a warning, no longer raise an exception
    This is preferable when `key_mapping` is done defensively for variabilities in the CSV files.

## 1.6.0 (2022-05-03)
  * completely rewrote line parser
  * added methods `SmarterCSV.raw_headers` and `SmarterCSV.headers` to allow easy examination of how the headers are processed.

## 1.5.2 (2022-04-29)
  * added missing keys to the SmarterCSV::KeyMappingError exception message #189 (thanks to John Dell)
  
## 1.5.1 (2022-04-27)
  * added raising of `KeyMappingError` if `key_mapping` refers to a non-existent key
  * added option `duplicate_header_suffix` (thanks to Skye Shaw)
    When given a non-nil string, it uses the suffix to append numbering 2..n to duplicate headers.
    If your code will need to process arbitrary CSV files, please set `duplicate_header_suffix`.

## 1.5.0 (2022-04-25)
  * fixed bug with trailing col_sep characters, introduced in 1.4.0
  * Fix deprecation warning in Ruby 3.0.3 / $INPUT_RECORD_SEPARATOR (thanks to Joel Fouse )

  * changed default for `comment_regexp` to be `nil` for a safer default behavior (thanks to David Lazar)
  **Note**
    This no longer assumes that lines starting with `#` are comments.
    If you want to treat lines starting with '#' as comments, use `comment_regexp: /\A#/`

## 1.4.2 (2022-02-12)
  * fixed issue with simplecov

## 1.4.1 (2022-02-12) (PULLED)
  * minor fix: also support `col_sep: :auto`
  * added simplecov

## 1.4.0 (2022-02-11)
  * dropped GPL license, smarter_csv is now only using the MIT License
  * added experimental option `col_sep: 'auto` to auto-detect the column separator (issue #183)
    The default behavior is still to assume `,` is the column separator. 
  * fixed buggy behavior when using `remove_empty_values: false` (issue #168)
  * fixed Ruby 3.0 deprecation

## 1.3.0 (2022-02-06) Breaking code change if you used `--key_mappings`
 * fix bug for key_mappings (issue #181)   
   The values of the `key_mappings` hash will now be used "as is", and no longer forced to be symbols

   **Users with existing code with `--key_mappings` need to change their code** to 
     * either use symbols in the `key_mapping` hash
     * or change the expected keys from symbols to strings

## 1.2.9 (2021-11-22) (PULLED)
 * fix bug for key_mappings (issue #181)
   The values of the `key_mappings` hash will now be used "as is", and no longer forced to be symbols

## 1.2.8 (2020-02-04)
 * fix deprecation warnings on Ruby 2.7 (thank to Diego Salido)

## 1.2.7 (2020-02-03)

## 1.2.6 (2018-11-13)
 * fixing error caused by calling f.close when we do not hand in a file

## 1.2.5 (2018-09-16)
 * fixing issue #136 with comments in CSV files
 * fixing error class hierarchy

## 1.2.4 (2018-08-06)
 * using Rails blank? if it's available

## 1.2.3 (2018-01-27)
 * fixed regression / test
 * fuxed quote_char interpolation for headers, but not data (thanks to Colin Petruno)
 * bugfix (thanks to Joshua Smith for reporting)

## 1.2.0 (2018-01-20)
 * add default validation that a header can only appear once
 * add option `required_headers`

## 1.1.5 (2017-11-05)
 * fix issue with invalid byte sequences in header (issue #103, thanks to Dave Myron)
 * fix issue with invalid byte sequences in multi-line data (thanks to Ivan Ushakov)
 * analyze only 500 characters by default when `:row_sep => :auto` is used.
   added option `row_sep_auto_chars` to change the default if necessary. (thanks to Matthieu Paret)

## 1.1.4 (2017-01-16)
 * fixing UTF-8 related bug which was introduced in 1.1.2 (thanks to Tirdad C.)

## 1.1.3 (2016-12-30)
 * added warning when options indicate UTF-8 processing, but input filehandle is not opened with r:UTF-8 option

## 1.1.2 (2016-12-29)
 * added option `invalid_byte_sequence` (thanks to polycarpou)
 * added comments on handling of UTF-8 encoding when opening from File vs. OpenURI (thanks to KevinColemanInc)

## 1.1.1 (2016-11-26)
 * added option to `skip_lines` (thanks to wal)
 * added option to `force_utf8` encoding (thanks to jordangraft)
 * bugfix if no headers in input data (thanks to esBeee)
 * ensure input file is closed (thanks to waldyr)
 * improved verbose output (thankd to benmaher)
 * improved documentation

## 1.1.0 (2015-07-26)
 * added feature :value_converters, which allows parsing of dates, money, and other things (thanks to Raphaël Bleuse, Lucas Camargo de Almeida, Alejandro)
 * added error if :headers_in_file is set to false, and no :user_provided_headers are given (thanks to innhyu)
 * added support to convert dashes to underscore characters in headers (thanks to César Camacho)
 * fixing automatic detection of \r\n line-endings (thanks to feens)

## 1.0.19 (2014-10-29)
 * added option :keep_original_headers to keep CSV-headers as-is (thanks to Benjamin Thouret)

## 1.0.18 (2014-10-27)
 * added support for multi-line fields / csv fields containing CR (thanks to Chris Hilton) (issue #31)

## 1.0.17 (2014-01-13)
 * added option to set :row_sep to :auto , for automatic detection of the row-separator (issue #22)

## 1.0.16 (2014-01-13)
 * :convert_values_to_numeric option can now be qualified with :except or :only (thanks to Hugo Lepetit)
 * removed deprecated `process_csv` method

## 1.0.15 (2013-12-07)
 * new option:
   * :remove_unmapped_keys  to completely ignore columns which were not mapped with :key_mapping (thanks to Dave Sanders)

## 1.0.14 (2013-11-01)
 * added GPL-2 and MIT license to GEM spec file; if you need another license contact me

## 1.0.12 (2013-10-15)
 * added RSpec tests

## 1.0.11 (2013-09-28)
 * bugfix : fixed issue #18 - fixing issue with last chunk not being properly returned (thanks to Jordan Running)
 * added RSpec tests

## 1.0.10 (2013-06-26)
 * bugfix : fixed issue #14 - passing options along to CSV.parse (thanks to Marcos Zimmermann)

## 1.0.9 (2013-06-19)
 * bugfix : fixed issue #13 with negative integers and floats not being correctly converted (thanks to Graham Wetzler)

## 1.0.8 (2013-06-01)

 * bugfix : fixed issue with nil values in inputs with quote-char (thanks to Félix Bellanger)
 * new options:
    * :force_simple_split : to force simiple splitting on :col_sep character for non-standard CSV-files. e.g. without properly escaped :quote_char
    * :verbose : print out line number while processing (to track down problems in input files)

## 1.0.7 (2013-05-20)

 * allowing process to work with objects with a 'readline' method (thanks to taq)
 * added options:
    * :file_encoding : defaults to utf8  (thanks to MrTin, Paxa)

## 1.0.6 (2013-05-19)

 * bugfix : quoted fields are now correctly parsed

## 1.0.5 (2013-05-08)

 * bugfix : for :headers_in_file option

## 1.0.4 (2012-08-17)

 * renamed the following options:
    * :strip_whitepace_from_values => :strip_whitespace   - removes leading/trailing whitespace from headers and values

## 1.0.3 (2012-08-16)

 * added the following options:
    * :strip_whitepace_from_values   - removes leading/trailing whitespace from values

## 1.0.2 (2012-08-02)

 * added more options for dealing with headers:
    * :user_provided_headers ,user provided Array with header strings or symbols, to precisely define what the headers should be, overriding any in-file headers (default: nil)
    * :headers_in_file , if the file contains headers as the first line (default: true)

## 1.0.1 (2012-07-30)

 * added the following options:
    * :downcase_header
    * :strings_as_keys
    * :remove_zero_values
    * :remove_values_matching
    * :remove_empty_hashes
    * :convert_values_to_numeric

 * renamed the following options:
    * :remove_empty_fields => :remove_empty_values


## 1.0.0 (2012-07-29)

 * renamed `SmarterCSV.process_csv` to `SmarterCSV.process`.

## 1.0.0.pre1 (2012-07-29)