NAME

validate-with-sah - Validate data with Sah schema

VERSION

This document describes version 0.477 of validate-with-sah (from Perl distribution App-SahUtils), released on 2020-02-12.

SYNOPSIS

Usage:

 % validate-with-sah [options] [schema] [data]

Examples:

Should succeed and return empty string:

 % validate-with-sah '"int*"' 42
 

Should show an error message because "x" is not int:

 % validate-with-sah '"int*"' '"x"'
 Not of type integer

Validate multiple data, should return "", 1, "":

 % validate-with-sah '["int","min",1,"max",10]' --multiple-data-json '[-4,7,15]' --return-type bool
 ["", 1, ""]

Show data alongside with result, in a table:

 % validate-with-sah '["int","min",1,"max",10]' --multiple-data-json '[-4,7,15]' -d
 [
   { data => -4, result => "Must be at least 1" },
   { data => 7, result => "" },
   { data => 15, result => "Must be at most 10" },
 ]

Show validator Perl code only, with line number:

 % validate-with-sah '["int","min",1,"max",10]' -c -l
    1|do {
    2|    no warnings ('void');
    3|    require Scalar::Util::Numeric;
    4|    sub {
    5|        my ($data) = @_;
    6|        my $err_data;
    7|        my $_sahv_res = 
     |        
    9|            # skip if undef
   10|            (!defined($data) ? 1 : 
     |            
   12|            (# check type 'int'
   13|            ((Scalar::Util::Numeric::isint($data)) ? 1 : (($err_data //= "Not of type integer"),0))
     |            
   15|            &&
     |            
   17|            (# clause: min
   18|            (($data >= 1) ? 1 : (($err_data //= "Must be at least 1"),0)))
     |            
   20|            &&
     |            
   22|            (# clause: max
   23|            (($data <= 10) ? 1 : (($err_data //= "Must be at most 10"),0)))));
     |        
   25|        ($err_data //= "");
     |        
   27|        return($err_data);
   28|    }}

Show validator JavaScript code:

 % validate-with-sah '["int","min",1,"max",10]' -c -C js
 function(data) {
     var err_data = null;
     var tmp_data = [];
     var _sahv_res = 
     
         // skip if undef
         (!!(data === undefined || data === null) ? true : 
         
         (// check type 'int'
         ((typeof(data)=='number' && Math.round(data)==data || parseInt(data)==data) ? true : (err_data = !(err_data === undefined || err_data === null) ? err_data : "Not of type integer",0))
         
         &&
         
         // set temporary data term
         ((tmp_data[0] = typeof(data)=='number' ? data : parseFloat(data)), true)
         
         &&
         
         (// clause: min
         ((tmp_data[0] >= 1) ? true : (err_data = !(err_data === undefined || err_data === null) ? err_data : "Must be at least 1",0)))
         
         &&
         
         (// clause: max
         ((tmp_data[0] <= 10) ? true : (err_data = !(err_data === undefined || err_data === null) ? err_data : "Must be at most 10",0)))
         
         &&
         
         // restore original data term
         ((tmp_data).pop(), true)));
     
     err_data = !(err_data === undefined || err_data === null) ? err_data : "";
     
     return(err_data);
 }

Show validator JS code only, with line number:

 % validate-with-sah '["int","min",1,"max",10]' -C js -c -l
    1|function(data) {
    2|    var err_data = null;
    3|    var tmp_data = [];
    4|    var _sahv_res = 
     |    
    6|        // skip if undef
    7|        (!!(data === undefined || data === null) ? true : 
     |        
    9|        (// check type 'int'
   10|        ((typeof(data)=='number' && Math.round(data)==data || parseInt(data)==data) ? true : (err_data = !(err_data === undefined || err_data === null) ? err_data : "Not of type integer",0))
     |        
   12|        &&
     |        
   14|        // set temporary data term
   15|        ((tmp_data[0] = typeof(data)=='number' ? data : parseFloat(data)), true)
     |        
   17|        &&
     |        
   19|        (// clause: min
   20|        ((tmp_data[0] >= 1) ? true : (err_data = !(err_data === undefined || err_data === null) ? err_data : "Must be at least 1",0)))
     |        
   22|        &&
     |        
   24|        (// clause: max
   25|        ((tmp_data[0] <= 10) ? true : (err_data = !(err_data === undefined || err_data === null) ? err_data : "Must be at most 10",0)))
     |        
   27|        &&
     |        
   29|        // restore original data term
   30|        ((tmp_data).pop(), true)));
     |    
   32|    err_data = !(err_data === undefined || err_data === null) ? err_data : "";
     |    
   34|    return(err_data);
   35|}

Load schema from file:

 % validate-with-sah -f schema1.json '["data"]'

Load schema and data from file:

 % validate-with-sah -f schema1.json --multiple-data-file datafile --data-file-type json

DESCRIPTION

This script is useful for testing Sah schemas. You can quickly specify from the CLI a schema with some data to validate it against. This script can also be used to just normalize a Sah schema and show it (--show-schema), or compile a schema and show the raw compilation result (--show-raw-compile), or generate validator code and show it (--show-code).

OPTIONS

* marks required options.

Action selection options

--show-code, -c

Don't validate data, show generated validator code only.

--show-raw-compile, -R

Don't validate data, show raw compilation result only.

--show-schema, -s

Don't validate data, show normalized schema only.

Configuration options

--config-path=s

Set path to configuration file.

Can be specified multiple times.

--config-profile=s, -P

Set configuration profile to use.

--no-config

Do not use any configuration file.

Data specification options

--data-file-type=s

Give hint for data file type.

Valid values:

 ["json","yaml","perl"]
--data-file=filename

Retrieve data from file.

JSON, YAML, and Perl formats are supported. File type will be guessed from filename, defaults to JSON.

--data-json=s

See --data.

--data=s
--multiple-data-file=filename

Retrieve multiple data from file.

This is like `data_file` except that for multiple data. Data must be an array.

--multiple-data-json=s

Validate multiple data (array of data) against schema (JSON-encoded).

See --multiple-data.

--multiple-data=s

Validate multiple data (array of data) against schema.

Environment options

--no-env

Do not read environment for default options.

Output options

--data-with-result, -d

Show data alongside with validation result.

The default is to show the validation result only.

--format=s

Choose output format, e.g. json, text.

Default value:

 undef
--json

Set output format to json.

--linenum, -l

When showing source code, add line numbers.

--no-naked-res

When outputing as JSON, add result envelope.

By default, when outputing as JSON, the full enveloped result is returned, e.g.:

    [200,"OK",[1,2,3],{"func.extra"=>4}]

The reason is so you can get the status (1st element), status message (2nd element) as well as result metadata/extra result (4th element) instead of just the result (3rd element). However, sometimes you want just the result, e.g. when you want to pipe the result for more post-processing. In this case you can use `--naked-res` so you just get:

    [1,2,3]
--page-result

Filter output through a pager.

Schema specification options

--schema-file-type=s, -t

Give hint for schema file type.

Valid values:

 ["json","yaml","perl"]
--schema-file=filename, -f

Retrieve schema from file.

JSON, YAML, and Perl formats are supported. File type will be guessed from filename, defaults to JSON.

--schema-json=s

See --schema.

--schema-module=s, -m
--schema=s

Validator specification options

--bool

Shortcut for --return-type bool.

See --return-type.

--bool-val

Shortcut for --return-type bool+val.

See --return-type.

--compiler=s, -C

Select compiler.

Default value:

 "perl"

Valid values:

 ["perl","js"]
--core

Generate Perl validator that avoids the use of non-core modules.

--core-or-pp

Generate Perl validator that only uses core or pure-perl modules.

--full

Shortcut for --return-type full.

See --return-type.

--no-modules

Generate Perl validator that does not use modules.

--pp

Generate Perl validator that avoids the use of XS modules.

--return-type=s, -r

Default value:

 "str"

Valid values:

 ["bool_valid","bool_valid+val","str_errmsg","str_errmsg+val","hash_details"]
--str-val

Shortcut for --return-type str+val.

See --return-type.

--with-debug

Generate validator with debug on.

This means e.g. to pepper the validator code with logging statements.

Other options

--help, -h, -?

Display help message and exit.

--version, -v

Display program's version and exit.

COMPLETION

This script has shell tab completion capability with support for several shells.

bash

To activate bash completion for this script, put:

 complete -C validate-with-sah validate-with-sah

in your bash startup (e.g. ~/.bashrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is recommended, however, that you install modules using cpanm-shcompgen which can activate shell completion for scripts immediately.

tcsh

To activate tcsh completion for this script, put:

 complete validate-with-sah 'p/*/`validate-with-sah`/'

in your tcsh startup (e.g. ~/.tcshrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.

It is also recommended to install shcompgen (see above).

other shells

For fish and zsh, install shcompgen as described above.

FAQ

When there is an error (e.g. in generating validator code, in validating) the program returns undef/null, how do I see the error message?

Pass `--no-naked-res` to see the error code and error message. The default is naked for simpler output.

CONFIGURATION FILE

This script can read configuration files. Configuration files are in the format of IOD, which is basically INI with some extra features.

By default, these names are searched for configuration filenames (can be changed using --config-path): ~/.config/validate-with-sah.conf, ~/validate-with-sah.conf, or /etc/validate-with-sah.conf.

All found files will be read and merged.

To disable searching for configuration files, pass --no-config.

You can put multiple profiles in a single file by using section names like [profile=SOMENAME] or [SOMESECTION profile=SOMENAME]. Those sections will only be read if you specify the matching --config-profile SOMENAME.

You can also put configuration for multiple programs inside a single file, and use filter program=NAME in section names, e.g. [program=NAME ...] or [SOMESECTION program=NAME]. The section will then only be used when the reading program matches.

Finally, you can filter a section by environment variable using the filter env=CONDITION in section names. For example if you only want a section to be read if a certain environment variable is true: [env=SOMEVAR ...] or [SOMESECTION env=SOMEVAR ...]. If you only want a section to be read when the value of an environment variable has value equals something: [env=HOSTNAME=blink ...] or [SOMESECTION env=HOSTNAME=blink ...]. If you only want a section to be read when the value of an environment variable does not equal something: [env=HOSTNAME!=blink ...] or [SOMESECTION env=HOSTNAME!=blink ...]. If you only want a section to be read when an environment variable contains something: [env=HOSTNAME*=server ...] or [SOMESECTION env=HOSTNAME*=server ...]. Note that currently due to simplistic parsing, there must not be any whitespace in the value being compared because it marks the beginning of a new section filter or section name.

List of available configuration parameters:

 compiler (see --compiler)
 core (see --core)
 core_or_pp (see --core-or-pp)
 data (see --data)
 data_file (see --data-file)
 data_file_type (see --data-file-type)
 data_with_result (see --data-with-result)
 format (see --format)
 linenum (see --linenum)
 multiple_data (see --multiple-data)
 multiple_data_file (see --multiple-data-file)
 naked_res (see --naked-res)
 no_modules (see --no-modules)
 pp (see --pp)
 return_type (see --return-type)
 schema (see --schema)
 schema_file (see --schema-file)
 schema_file_type (see --schema-file-type)
 schema_module (see --schema-module)
 show_code (see --show-code)
 show_raw_compile (see --show-raw-compile)
 show_schema (see --show-schema)
 with_debug (see --with-debug)

ENVIRONMENT

VALIDATE_WITH_SAH_OPT => str

Specify additional command-line options.

FILES

~/.config/validate-with-sah.conf

~/validate-with-sah.conf

/etc/validate-with-sah.conf

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/App-SahUtils.

SOURCE

Source repository is at https://github.com/perlancar/perl-App-SahUtils.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-SahUtils

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

SEE ALSO

To normalize a schema, you can also use normalize-sah-schema.

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2020, 2019, 2018, 2017, 2016, 2015 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.