./textproc/miller, Command-line CSV processor

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Branch: CURRENT, Version: 5.2.2, Package name: miller-5.2.2, Maintainer: pkgsrc-users

Miller is like sed, awk, cut, join, and sort for name-indexed data
such as CSV.

With Miller, you get to use named fields without needing to count
positional indices.

This is something the Unix toolkit always could have done, and
arguably always should have done. It operates on key-value-pair
data while the familiar Unix tools operate on integer-indexed
fields: if the natural data structure for the latter is the array,
then Miller's natural data structure is the insertion-ordered hash
map. This encompasses a variety of data formats, including but not
limited to the familiar CSV. (Miller can handle positionally-indexed
data as a special case.)


Required to build:
[textproc/asciidoc] [pkgtools/cwrappers]

Master sites:

SHA1: 1b130238401ae30096d984961af0e1f88d583a1a
RMD160: 8147e4ff0a7125ece80246b35e0b54c1c8c50833
Filesize: 1163.244 KB

Version history: (Expand)


CVS history: (Expand)


   2017-08-14 23:22:55 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated miller to 5.2.2.

5.2.2

This bugfix release delivers a fix for #147 where a memory allocation failed \ 
beyond 4GB.

5.2.1

Fix non-x86/gcc7 build error
   2017-07-31 00:32:28 by Thomas Klausner | Files touched by this commit (229)
Log message:
Switch github HOMEPAGEs to https.
   2017-06-19 22:28:50 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated miller to 5.2.0.

This release contains mostly feature requests.

Features:

    The stats1 verb now lets you use regular expressions to specify
    which field names to compute statistics on, and/or which to
    group by. Full details are here.

    The min and max DSL functions, and the min/max/percentile
    aggregators for the stats1 and merge-fields verbs, now support
    numeric as well as string field values. (For mixed string/numeric
    fields, numbers compare before strings.) This means in particular
    that order statistics -- min, max, and non-interpolated percentiles
    -- as well as mode, antimode, and count are now possible on
    string-only (or mixed) fields. (Of course, any operations
    requiring arithmetic on values, such as computing sums, averages,
    or interpolated percentiles, yield an error on string-valued
    input.)

    There is a new DSL function mapexcept which returns a copy of
    the argument with specified key(s), if any, unset. The motivating
    use-case is to split records to multiple filenames depending
    on particular field value, which is omitted from the output:
    mlr --from f.dat put 'tee > "/tmp/data-".$a, mapexcept($*, \ 
"a")'
    Likewise, mapselect returns a copy of the argument with only
    specified key(s), if any, set. This resolves #137.

    A new -u option for count-distinct allows unlashed counts for
    multiple field names. For example, with -f a,b and without -u,
    count-distinct computes counts for distinct pairs of a and b
    field values. With -f a,b and with -u, it computes counts for
    distinct a field values and counts for distinct b field values
    separately.

    If you build from source, you can now do ./configure without
    first doing autoreconf -fiv. This resolves #131.

    The UTF-8 BOM sequence 0xef 0xbb 0xbf is now automatically
    ignored from the start of CSV files. (The same is already done
    for JSON files.) This resolves #138.

    For put and filter with -S, program literals such as the 6 in
    $x = 6 were being parsed as strings. This is not sensible, since
    the -S option for put and filter is intended to suppress numeric
    conversion of record data, not program literals. To get string
    6 one may use $x = "6".

Documentation:

    A new cookbook example shows how to compute differences between
    successive queries, e.g. to find out what changed in time-varying
    data when you run and rerun a SQL query.

    Another new cookbook example shows how to compute interquartile
    ranges.

    A third new cookbook example shows how to compute weighted
    means.

Bugfixes:

    CRLF line-endings were not being correctly autodetected when
    I/O formats were specified using --c2j et al.

    Integer division by zero was causing a fatal runtime exception,
    rather than computing inf or nan as in the floating-point case.
   2017-04-19 15:39:39 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated miller to 5.1.0.

This is a relatively minor release of Miller, containing feature
requests and bugfixes while I've been working on the Windows port
(which is nearly complete).

Features:

    JSON arrays: as described here, Miller being a tabular data
    processor isn't well-position to handle arbitrary JSON. (See
    jq for that.) But as of 5.1.0, arrays are converted to maps
    with integer keys, which are then at least processable using
    Miller. Details are here. The short of it is that you now have
    three options for the main mlr executable:

--json-map-arrays-on-input    Convert JSON array indices to Miller
map keys. (This is the default.) --json-skip-arrays-on-input
Disregard JSON arrays.  --json-fatal-arrays-on-input  Raise a fatal
error when JSON arrays are encountered in the input.

This resolves #133.

    The new mlr fraction verb makes possible in a few keystrokes
    what was only possible before using two-pass DSL logic: here
    you can turn numerical values down a column into their
    fractional/percentage contribution to column totals, optionally
    grouped by other key columns.

    The DSL functions strptime and strftime now handle fractional
    seconds. For parsing, use %S format as always; for formatting,
    there are now %1S through %9S which allow you to configure a
    specified number of decimal places. The return value from
    strptime is now floating-point, not integer, which is a minor
    backward incompatibility not worth labeling this release as
    6.0.0. (You can work around this using int(strptime(...)).) The
    DSL functions gmt2sec and sec2gmt, which are keystroke-savers
    for strptime and strftime, are similarly modified, as is the
    sec2gmt verb. This resolves #125.

    A few nearly-standalone programs -- which do not have anything
    to do with record streams -- are packaged within the Miller.
    (For example, hex-dump, unhex, and show-line-endings commands.)
    These are described here.

    The stats1 and merge-fields verbs now support an antimode
    aggregator, in addition to the existing mode aggregator.

    The join verb now by default does not require sorted input,
    which is the more common use case. (Memory-parsimonious joins
    which require sorted input, while no longer the default, are
    available using -s.) This another minor backward incompatibility
    not worth making a 6.0.0 over. This resolves #134.

    mlr nest has a keystroke-saving --evar option for a common use
    case, namely, exploding a field by value across records.

Documentation:

    The DSL reference now has per-function descriptions.

    There is a new feature-counting example in the cookbook.

Bugfixes:

    mlr join -j -l was not functioning correctly. This resolves
    #136.

    JSON escapes on output (\t and so on) were incorrect. This
    resolves #135.
   2017-03-20 14:04:13 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated miller to 5.0.1.

Two minor bugfixes

    As described in #132, mlr nest was incorrectly splitting fields
    with multi-character separators.

    The XTAB-format reader, when using multi-character IPS, was
    incorrectly splitting key-value pairs, but only when reading
    from standard input (e.g. on a pipe or less-than redirect).
   2017-03-05 13:37:30 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated miller to 5.0.0.

Autodetected line-endings, in-place mode, user-defined functions, and more

This major release significantly expands the expressiveness of the DSL for mlr \ 
put and mlr filter. (The upcoming 5.1.0 release will add the ability to \ 
aggregate across all columns for non-DSL verbs such as mlr stats1 and mlr \ 
stats2. As well, a Windows port is underway.)

Please also see the Miller main docs.

Simple but impactful features:

    Line endings (CRLF vs. LF, Windows-style vs. Unix-style) are now \ 
autodetected. For example, files (including CSV) with LF input will lead to LF \ 
output unless you specify otherwise.
    There is now an in-place mode using mlr -I.

Major DSL features:

    You can now define your own functions and subroutines: e.g. func f(x, y) { \ 
return x**2 + y**2 }.
    New local variables are completely analogous to out-of-stream variables: sum \ 
retains its value for the duration of the expression it's defined in; @sum \ 
retains its value across all records in the record stream.
    Local variables, function parameters, and function return types may be \ 
defined untyped or typed as in x = 1 or int x = 1, respectively. There are also \ 
expression-inline type-assertions available. Type-checking is up to you: omit it \ 
if you want flexibility with heterogeneous data; use it if you want to help \ 
catch misspellings in your DSL code or unexpected irregularities in your input \ 
data.
    There are now four kinds of maps. Out-of-stream variables have always been \ 
scalars, maps, or multi-level maps: @a=1, @b[1]=2, @c[1][2]=3. The same is now \ 
true for local variables, which are new to 5.0.0. Stream records have always \ 
been single-level maps; $* is a map. And as of 5.0.0 there are now map literals, \ 
e.g. {"a":1, "b":2}, which can be defined using JSON-like \ 
syntax (with either string or integer keys) and which can be nested arbitrarily \ 
deeply.
    You can loop over maps -- $*, out-of-stream variables, local variables, \ 
map-literals, and map-valued function return values -- using for (k, v in ...) \ 
or the new for (k in ...) (discussed next). All flavors of map may also be used \ 
in emit and dump statements.
    User-defined functions and subroutines may take map-valued arguments, and \ 
may return map values.
    Some built-in functions now accept map-valued input: typeof, length, depth, \ 
leafcount, haskey. There are built-in functions producing map-valued output: \ 
mapsum and mapdiff. There are now string-to-map and map-to-string functions: \ 
splitnv, splitkv, splitnvx, splitkvx, joink, joinv, and joinkv.

Minor DSL features:

    For iterating over maps (namely, local variables, out-of-stream variables, \ 
stream records, map literals, or return values from map-valued functions) there \ 
is now a key-only for-loop syntax: e.g. for (k in $*) { ... }. This is in \ 
addition to the already-existing for (k, v in ...) syntax.
    There are now triple-statement for-loops (familiar from many other \ 
languages), e.g. for (int i = 0; i < 10; i += 1) { ... }.
    mlr put and mlr filter now accept multiple -f for script files, freely \ 
intermixable with -e for expressions. The suggested use case is putting \ 
user-defined functions in script files and one-liners calling them using -e. \ 
Example: myfuncs.mlr defines the function f(...), then mlr put -f myfuncs.mlr -e \ 
'$o = f($i)' myfile.dat. More information is here.
    mlr filter is now almost identical to mlr put: it can have multiple \ 
statements, it can use begin and/or end blocks, it can define and invoke \ 
functions. Its final expression must evaluate to boolean which is used as the \ 
filter criterion. More details are here.
    The min and max functions are now variadic: $o = max($a, $b, $c).
    There is now a substr function.
    While ENV has long provided read-access to environment variables on the \ 
right-hand side of assignments (as a getenv), it now can be at the left-hand \ 
side of assignments (as a putenv). This is useful for subsidiary processes \ 
created by tee, emit, dump, or print when writing to a pipe.
    Handling for the # in comments is now handled in the lexer, so you can now \ 
(correctly) include # in strings.
    Separators are now available as read-only variables in the DSL: IPS, IFS, \ 
IRS, OPS, OFS, ORS. These are particularly useful with the split and join \ 
functions: e.g. with mlr --ifs tab ..., the IFS variable within a DSL expression \ 
will evaluate to a string containing a tab character.
    Syntax errors in DSL expressions now have a little more context.
    DSL parsing and execution are a bit more transparent. There have long been \ 
-v and -t options to mlr put and mlr filter, which print the expression's \ 
abstract syntax tree and do a low-level parser trace, respectively. There are \ 
now additionally -a which traces stack-variable allocation and -T which traces \ 
statements line by line as they execute. While -v, -t, and -a are most useful \ 
for development of Miller, the -T option gives you more visibility into what \ 
your Miller scripts are doing. See also here.

Verbs:

    most-frequent and least-frequent as requested in #110.
    seqgen makes it easy to generate data from within Miller: please also see \ 
here for a usage example.
    unsparsify makes it easy to rectangularize data where not all records have \ 
the same fields.
    cat -n now takes a group-by (-g) option, making it easy to number records \ 
within categories.
    count-distinct,
    uniq,
    most-frequent,
    least-frequent,
    top, and
    histogram
    now take a -o option for specifying their output field names, as requested \ 
in #122.
    Median is now a synonym for p50 in stats1.
    You can now start a then chain with an initial then, which is nice in \ 
backslashy/multiline-continuation contexts.
    This was requested in #130.

I/O options:

    The print statement may now be used with no arguments, which prints a \ 
newline, and a no-argument printn prints nothing but creates a zero-length file \ 
in redirected-output context.
    Pretty-print format now has a --pprint --barred option (for output only, not \ 
input). For an example, please see here.
    There are now keystroke-savers of the form --c2p which abbreviate --icsvlite \ 
--opprint, and so on.
    Miller's map literals are JSON-looking but allow integer keys which JSON \ 
doesn't. The
    --jknquoteint and --jvquoteall flags for mlr (when using JSON output) and \ 
mlr put (for dump) provide control over double-quoting behavior.

Documents new since the previous release:

    Miller in 10 minutes is a long-overdue addition: while Miller's detailed \ 
documentation is evident, there has been a lack of more succinct examples.
    The cookbook has likewise been expanded, and has been split out
    into three parts: part 1, part
    2, part 3.
    A bit more background on C performance compared to other languages I \ 
experimented with, early on in the development of Miller, is here.

On-line help:

    Help for DSL built-in functions, DSL keywords, and verbs is accessible using \ 
mlr -f, mlr -k, and mlr -l respectively; name-only lists are available with mlr \ 
-F, mlr -K, and mlr -L.

Bugfixes:

    A corner-case bug causing a segmentation violation on two sub/gsub \ 
statements within a single put, the first one matching its pattern and the \ 
second one not matching its pattern, has been fixed.

Backward incompatibilities: This is Miller 5.0.0, not 4.6.0, due to the \ 
following (all relatively minor):

    The v variables bound in for-loops such as for (k, v in \ 
some_multi_level_map) { ... } can now be map-valued if the v specifies a \ 
non-terminal in the map.
    There are new keywords such as var, int, float, num, str, bool, map, IPS, \ 
IFS, IRS, OPS, OFS, ORS which can no longer be used as variable names. See mlr \ 
-k for the complete list.
    Unset of the last key in an map-valued variable's map level no longer \ 
removes the level: e.g. with @v[1][2]=3 and unset @v[1][2] the @v variable would \ 
be empty. As of 5.0.0, @v has key 1 with an empty-map value.
    There is no longer type-inference on literals: "3"+4 no longer \ 
gives 7. (That was never a good idea.)
    The typeof function used to say things like MT_STRING; now it says things \ 
like string.
   2016-09-01 18:25:51 by Thomas Klausner | Files touched by this commit (2) | Package updated
Log message:
Updated miller to 4.5.0.

4.5.0

Customizable output format for redirected output

In a natural follow-on to the 4.4.0 redirected-output feature, the
4.5.0 release allows your tap-files to be in a different output
format from the main program output.

For example, using

mlr --icsv --opprint ... then put --ojson 'tee > \ 
"mytap-".$a.".dat",
$*' then ...

the input is CSV, the output is pretty-print tabular, but the
tee-files output is written in JSON format. Likewise --ofs, --ors,
--ops, --jvstack, and all other output-formatting options from the
main help at mlr -h and/or man mlr default to the main command-line
options, and may be overridden with flags supplied to mlr put and
mlr tee.

4.4.0

Redirected output, row-value shift, and other features

The principal feature of Miller 4.4.0 is redirected output. Inspired
by awk, Miller lets you tap/tee your data as it's processed, run
output through subordinate processes such as gzip and jq, split a
single file into multiple files per an account-ID column, and so
on.

Details:
http://johnkerl.org/miller/doc/referenc … ts_for_put

Other features:

    mlr step -a shift allows you to place the previous record's
    values alongside the current record's values:
    http://johnkerl.org/miller/doc/reference.html#step

    mlr head, when used without the group-by flag (-g), stops after
    the specified number of records has been output. For example,
    even with a multi-gigabyte data file, mlr head -n 10 hugefile.dat
    will complete quickly after producing the first ten records
    from the file.

    The sec2gmtdate verb, and sec2gmtdate function for filter/put,
    is new: please see
    http://johnkerl.org/miller/doc/referenc … ec2gmtdate and
    http://johnkerl.org/miller/doc/referenc … r_and_put.

    sec2gmt and sec2gmtdate both leave non-numbers as-is, rather
    than formatting them as (error). This is particularly relevant
    for formatting nullable epoch-seconds columns in SQL-table
    output: if a column value is NULL then after sec2gmt or
    sec2gmtdate it will still be NULL.

    The dot operator has been universalized to work with any data
    type and produce a string. For example, if the field n has
    integers, then instead of typing mlr put '$name = "value:".string($n)'
    you can now simply domlr put '$name = "value:".$n'. This is
    particularly timely for creating filenames for redirected
    print/dump/tee/emit output.

    The online documents now have a copy of the Miller manpage:
    http://johnkerl.org/miller/doc/manpage.html

    Bugfix: inside filter/put, $x=="" was distinct from isempty($x).
    This was nonsensical; now both are the same.
   2016-07-15 15:10:51 by Makoto Fujiwara | Files touched by this commit (2) | Package updated
Log message:
Updated textproc/miller 3.4.0 to 4.3.0
--------------------------------------
From: https://github.com/johnkerl/miller/releases
Summary:
 v4.3.0
    Interpolated percentiles, markdown-tabular output format, CSV-quote preservation
 v4.2.0
    Multi-emit
 v4.1.0
    for/if/while and various features
 v4.0.0
    Variables, begin/end blocks, pattern-action blocks
 v3.5.0
    New data-rearrangers: nest, shuffle, repeat; misc. features