[catagits/Gitalist.git] / local-lib5 / man / man3 / Template::Plugin::Datafile.3pm

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.\" way too many mistakes in technical documents.
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.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
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.\" ========================================================================
.\"
.IX Title "Template::Plugin::Datafile 3"
.TH Template::Plugin::Datafile 3 "2008-11-13" "perl v5.8.7" "User Contributed Perl Documentation"
.SH "NAME"
Template::Plugin::Datafile \- Plugin to construct records from a simple data file
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    [% USE mydata = datafile('/path/to/datafile') %]
\&    [% USE mydata = datafile('/path/to/datafile', delim = '|') %]
.Ve
.PP
.Vb 3
\&    [% FOREACH record = mydata %]
\&       [% record.this %]  [% record.that %]
\&    [% END %]
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This plugin provides a simple facility to construct a list of hash 
references, each of which represents a data record of known structure,
from a data file.
.PP
.Vb 1
\&    [% USE datafile(filename) %]
.Ve
.PP
A absolute filename must be specified (for this initial implementation at 
least \- in a future version it might also use the \f(CW\*(C`INCLUDE_PATH\*(C'\fR).  An 
optional \f(CW\*(C`delim\*(C'\fR parameter may also be provided to specify an alternate
delimiter character.
.PP
.Vb 2
\&    [% USE userlist = datafile('/path/to/file/users')     %]
\&    [% USE things   = datafile('items', delim = '|') %]
.Ve
.PP
The format of the file is intentionally simple.  The first line
defines the field names, delimited by colons with optional surrounding
whitespace.  Subsequent lines then defines records containing data
items, also delimited by colons.  e.g.
.PP
.Vb 3
\&    id : name : email : tel
\&    abw : Andy Wardley : abw@tt2.org : 555\-1234
\&    sam : Simon Matthews : sam@tt2.org : 555\-9876
.Ve
.PP
Each line is read, split into composite fields, and then used to 
initialise a hash array containing the field names as relevant keys.
The plugin returns a blessed list reference containing the hash 
references in the order as defined in the file.
.PP
.Vb 3
\&    [% FOREACH user = userlist %]
\&       [% user.id %]: [% user.name %]
\&    [% END %]
.Ve
.PP
The first line of the file \fBmust\fR contain the field definitions.
After the first line, blank lines will be ignored, along with comment
line which start with a '\f(CW\*(C`#\*(C'\fR'.
.SH "BUGS"
.IX Header "BUGS"
Should handle file names relative to \f(CW\*(C`INCLUDE_PATH\*(C'\fR.
Doesn't permit use of '\f(CW\*(C`:\*(C'\fR' in a field.  Some escaping mechanism is required.
.SH "AUTHOR"
.IX Header "AUTHOR"
Andy Wardley <abw@wardley.org> <http://wardley.org/>
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (C) 1996\-2007 Andy Wardley.  All Rights Reserved.
.PP
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Template::Plugin
Commit	Line	Data
3fea05b9	1	.\" Automatically generated by Pod::Man v1.37, Pod::Parser v1.3
	2	.\"
	3	.\" Standard preamble:
	4	.\" ========================================================================
	5	.de Sh \" Subsection heading
	6	.br
	7	.if t .Sp
	8	.ne 5
	9	.PP
	10	\fB\\$1\fR
	11	.PP
	12	..
	13	.de Sp \" Vertical space (when we can't use .PP)
	14	.if t .sp .5v
	15	.if n .sp
	16	..
	17	.de Vb \" Begin verbatim text
	18	.ft CW
	19	.nf
	20	.ne \\$1
	21	..
	22	.de Ve \" End verbatim text
	23	.ft R
	24	.fi
	25	..
	26	.\" Set up some character translations and predefined strings. \*(-- will
	27	.\" give an unbreakable dash, \(PI will give pi, \(L" will give a left
	28	.\" double quote, and \*(R" will give a right double quote. \| will give a
	29	.\" real vertical bar. \*(C+ will give a nicer C++. Capital omega is used to
	30	.\" do unbreakable dashes and therefore won't be available. \(C` and \(C'
	31	.\" expand to `' in nroff, nothing in troff, for use with C<>.
	32	.tr \(W-\|\(bv\(Tr
	33	.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
	34	.ie n \{\
	35	. ds -- \(*W-
	36	. ds PI pi
	37	. if (\n(.H=4u)&(1m=24u) .ds -- \(W\h'-12u'\(W\h'-12u'-\" diablo 10 pitch
	38	. if (\n(.H=4u)&(1m=20u) .ds -- \(W\h'-12u'\(W\h'-8u'-\" diablo 12 pitch
	39	. ds L" ""
	40	. ds R" ""
	41	. ds C` ""
	42	. ds C' ""
	43	'br\}
	44	.el\{\
	45	. ds -- \\|\(em\\|
	46	. ds PI \(*p
	47	. ds L" ``
	48	. ds R" ''
	49	'br\}
	50	.\"
	51	.\" If the F register is turned on, we'll generate index entries on stderr for
	52	.\" titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and index
	53	.\" entries marked with X<> in POD. Of course, you'll have to process the
	54	.\" output yourself in some meaningful fashion.
	55	.if \nF \{\
	56	. de IX
	57	. tm Index:\\$1\t\\n%\t"\\$2"
	58	..
	59	. nr % 0
	60	. rr F
	61	.\}
	62	.\"
	63	.\" For nroff, turn off justification. Always turn off hyphenation; it makes
	64	.\" way too many mistakes in technical documents.
65	.hy 0
66	.if n .na
67	.\"
68	.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
69	.\" Fear. Run. Save yourself. No user-serviceable parts.
70	. \" fudge factors for nroff and troff
71	.if n \{\
72	. ds #H 0
73	. ds #V .8m
74	. ds #F .3m
75	. ds #[ \f1
76	. ds #] \fP
77	.\}
78	.if t \{\
79	. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
80	. ds #V .6m
81	. ds #F 0
82	. ds #[ \&
83	. ds #] \&
84	.\}
85	. \" simple accents for nroff and troff
86	.if n \{\
87	. ds ' \&
88	. ds ` \&
89	. ds ^ \&
90	. ds , \&
91	. ds ~ ~
92	. ds /
93	.\}
94	.if t \{\
95	. ds ' \\k:\h'-(\\n(.wu8/10-\(#H)'\'\h"\|\\n:u"
96	. ds ` \\k:\h'-(\\n(.wu8/10-\(#H)'\`\h'\|\\n:u'
97	. ds ^ \\k:\h'-(\\n(.wu10/11-\(#H)'^\h'\|\\n:u'
98	. ds , \\k:\h'-(\\n(.wu*8/10)',\h'\|\\n:u'
99	. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'\|\\n:u'
100	. ds / \\k:\h'-(\\n(.wu8/10-\(#H)'\z\(sl\h'\|\\n:u'
101	.\}
102	. \" troff and (daisy-wheel) nroff accents
103	.ds : \\k:\h'-(\\n(.wu8/10-\(#H+.1m+\(#F)'\v'-\(#V'\z.\h'.2m+\(#F'.\h'\|\\n:u'\v'\(#V'
104	.ds 8 \h'\(#H'\(b\h'-\*(#H'
105	.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\(#H)/2u'\v'-.3n'\(#[\z\(de\v'.3n'\h'\|\\n:u'\*(#]
106	.ds d- \h'\(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\(#H'
107	.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'\|\\n:u'
108	.ds th \(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u2/3)'\s-1o\s+1\*(#]
109	.ds Th \(#[\s+2I\s-2\h'-\w'I'u3/5'\v'-.3m'o\v'.3m'\*(#]
110	.ds ae a\h'-(\w'a'u*4/10)'e
111	.ds Ae A\h'-(\w'A'u*4/10)'E
112	. \" corrections for vroff
113	.if v .ds ~ \\k:\h'-(\\n(.wu9/10-\(#H)'\s-2\u~\d\s+2\h'\|\\n:u'
114	.if v .ds ^ \\k:\h'-(\\n(.wu10/11-\(#H)'\v'-.4m'^\v'.4m'\h'\|\\n:u'
115	. \" for low resolution devices (crt and lpr)
116	.if \n(.H>23 .if \n(.V>19 \
117	\{\
118	. ds : e
119	. ds 8 ss
120	. ds o a
121	. ds d- d\h'-1'\(ga
122	. ds D- D\h'-1'\(hy
123	. ds th \o'bp'
124	. ds Th \o'LP'
125	. ds ae ae
126	. ds Ae AE
127	.\}
128	.rm #[ #] #H #V #F C
129	.\" ========================================================================
130	.\"
131	.IX Title "Template::Plugin::Datafile 3"
132	.TH Template::Plugin::Datafile 3 "2008-11-13" "perl v5.8.7" "User Contributed Perl Documentation"
133	.SH "NAME"
134	Template::Plugin::Datafile \- Plugin to construct records from a simple data file
135	.SH "SYNOPSIS"
136	.IX Header "SYNOPSIS"
137	.Vb 2
138	\& [% USE mydata = datafile('/path/to/datafile') %]
139	\& [% USE mydata = datafile('/path/to/datafile', delim = '\|') %]
140	.Ve
141	.PP
142	.Vb 3
143	\& [% FOREACH record = mydata %]
144	\& [% record.this %] [% record.that %]
145	\& [% END %]
146	.Ve
147	.SH "DESCRIPTION"
148	.IX Header "DESCRIPTION"
149	This plugin provides a simple facility to construct a list of hash
150	references, each of which represents a data record of known structure,
151	from a data file.
152	.PP
153	.Vb 1
154	\& [% USE datafile(filename) %]
155	.Ve
156	.PP
157	A absolute filename must be specified (for this initial implementation at
158	least \- in a future version it might also use the \f(CW\(C`INCLUDE_PATH\(C'\fR). An
159	optional \f(CW\(C`delim\(C'\fR parameter may also be provided to specify an alternate
160	delimiter character.
161	.PP
162	.Vb 2
163	\& [% USE userlist = datafile('/path/to/file/users') %]
164	\& [% USE things = datafile('items', delim = '\|') %]
165	.Ve
166	.PP
167	The format of the file is intentionally simple. The first line
168	defines the field names, delimited by colons with optional surrounding
169	whitespace. Subsequent lines then defines records containing data
170	items, also delimited by colons. e.g.
171	.PP
172	.Vb 3
173	\& id : name : email : tel
174	\& abw : Andy Wardley : abw@tt2.org : 555\-1234
175	\& sam : Simon Matthews : sam@tt2.org : 555\-9876
176	.Ve
177	.PP
178	Each line is read, split into composite fields, and then used to
179	initialise a hash array containing the field names as relevant keys.
180	The plugin returns a blessed list reference containing the hash
181	references in the order as defined in the file.
182	.PP
183	.Vb 3
184	\& [% FOREACH user = userlist %]
185	\& [% user.id %]: [% user.name %]
186	\& [% END %]
187	.Ve
188	.PP
189	The first line of the file \fBmust\fR contain the field definitions.
190	After the first line, blank lines will be ignored, along with comment
191	line which start with a '\f(CW\(C`#\(C'\fR'.
192	.SH "BUGS"
193	.IX Header "BUGS"
194	Should handle file names relative to \f(CW\(C`INCLUDE_PATH\(C'\fR.
195	Doesn't permit use of '\f(CW\(C`:\(C'\fR' in a field. Some escaping mechanism is required.
196	.SH "AUTHOR"
197	.IX Header "AUTHOR"
198	Andy Wardley <abw@wardley.org> <http://wardley.org/>
199	.SH "COPYRIGHT"
200	.IX Header "COPYRIGHT"
201	Copyright (C) 1996\-2007 Andy Wardley. All Rights Reserved.
202	.PP
203	This module is free software; you can redistribute it and/or
204	modify it under the same terms as Perl itself.
205	.SH "SEE ALSO"
206	.IX Header "SEE ALSO"
207	Template::Plugin