1 // helpmessage.5.helpm - manual page in HelpMessage format
3 HelpMessage - Format of the input to helpm2pod(1)
6 A HelpMessage text needs only be slightly modified to become a POD
7 formatted text (see perlpod(1)). It is a bit less powerful than POD but
8 it is more compact and more readable.
10 The structure is coded by the indentation. Section titles are line without
11 any indentation. Text belonging to the section follows it and is indented
12 by 1 tabulation character (at least). Subsections titles are indented by
15 In the sections USAGE/SYNOPSIS each line is considered a paragraph. In the
16 other sections paragraphs are separated by a blank line as in POD.
18 List items are indented by a space followed by a tabulation. List item
19 descriptions are indented by 2 tabulation characters.
21 Other structures or formatting is only supported in specific contexts.
23 In other cases leading white space is kept: such blocks are considered
24 verbatim text by POD. They do not need to start by an empty line as in
25 POD, which is convenient to give command line examples.
27 Inside normal text or list items, a specific style syntax is recognized
28 where each occurrence of a word of the form "<..>" or "*..*" is changed to
29 POD <italic> and POD *bold* respectively. SYNOPSIS lines and list items
30 inside the section OPTIONS have "<..>" plus some smart auto styling.
32 Otherwise POD formatting constructs should be avoided or restricted to add
33 styles to simple words, as (1) using them contradicts the aspiration to
34 simply write text, (2) it is simple and more adjustale to write directly
35 embedded POD and (3) they could interfere with the simplistic analyze made
38 A first line starting by a whitespace is considered a header and is
39 ignored. Lines starting by a hash (#) or a double slash (//) is considered
40 a comment and is ignored.
43 Embedding an HelpMessage text inside a program is suitable for small
44 simple programs, as in this case elaborate formatting may be disposed of
45 without loss of readability. The advantage is that by simply copying the
46 script without its generated manual page nor installing pod2man a compact
47 readable help message is still available to the user. The format is rather
48 prone to be reformatted to the adequate terminal width by fmt(1).
50 The script can generate the message dynamically, adding tty higlighting if
51 outputting to a terminal or HelpM styles if outputing to generate a
56 Help output that is never converted to a standard manual page.
58 Documentation converted by pod2man or pod2text (that are runtime
59 dependencies) or a help message that is less readable and less compact.
60 txt2man(1) or help2man(1)
61 Programs very similar to helpm2pod that support only man(7) output.
63 Programs that are more complex but with many more possibilities.
66 An example of a help message is given by:
67 $ helpm2pod -h |$PAGER
70 helpm2pod(1), perlpod(1), fmt(1), helpmselect(1), help2man(1), txt2man(1),