1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
# subtext -*- awk -*-
# (C) C Duckworth <acdw@acdw.net>
## Subtext is an awk program that converts roff-like input to a shell script
## that can output markup. Lines prefixed with . are wrapped in $(...)
## constructs within the `body' function, but lines prefixed with # are
## transported to the top of the file, where they're executed within the shell
## environment.
BEGIN {
## Tuneables
dryrun = dryrun ? dryrun : 0
sopath = sopath ? sopath : ".:" ENVIRON["HOME"] "/.subtext"
shxend = shxend ? shxend : "%%end"
## Shellfix: escape ` and $ in input
# Ask sed to do these b/c awk has no capture groups ;_;
shellfix = "sed -E" \
" -e 's/`/\\\\`/g'" \
" -e 's/(^|[^\\$])\\$([^\\$]|$)/\\1\\\\$\\2/g'" \
" -e 's/(^|[^\\$])\\$(\\$+)([^\\$]|$)/\\1\\2\\3/g'"
}
/\\$/ { # line continuation
getline nl
sub(/\\$/, "")
$0 = $0 " " nl
}
/^#so/ { # source a file
pushpar()
source($2)
next
}
/^#/ { # head lines
sub(/^#+[ ]*/,"")
head = head (head?"\n":"") $0
next
}
/^\.\./ { # block
body = body (body?"\n":"") \
"$$(unquote + << .." \
(length>2 ? " | " substr($1,3) " " shquote(2) : "") \
slurp("..") \
"..\n)"
next
}
/^\./ { # line
body = body (body?"\n":"") \
"$$(" substr($1, 2) " " shquote(2) ")"
next
}
/^$/ { # line break
if (!pushpar()) next
}
{ # regular text
par = par (par?"\n":"") $0
}
END {
if (dead) exit dead
print "#!/bin/sh"
print "### generated with subtext"
print "quote()(sed \"s/^/$1/\")"
print "unquote()(sed \"s/^$1//\")"
printf "shexpand()(eval \"$(echo 'cat<<%s';cat;echo '%s')\")\n", \
shxend, shxend
printf "shellfix()(%s)\n", shellfix
printf "ST_SOPATH=%s\n", sopath
print "### head"
print head
print "### body"
print "body(){ unquote : << \\_ | shexpand"
pushpar()
print body | (shellfix " -e 's/^/:/'")
close(shellfix " -e 's/^/:/'")
print "_"
print "}"
if (!dryrun) print "body"
}
function shquote(begin, end, out) {
if (!begin) begin = 1
if (!end) end = NF
for (i=begin; i<=NF; i++) {
gsub(/"/, "\\\"", $i)
out = out (out?" ":"") "\"" $i "\""
}
return out
}
function slurp(to, out, nl) {
while (nl != to) {
getline nl
out = out "\n+" nl
}
sub("\\+"to"$", "", out)
return out
}
function pushpar() {
if (!par) return 0
if (!match(par, /^[ ]*</))
par = "<p>" par "</p>"
body = body (body?"\n":"") par
par = ""
return 1
}
function source(name, found, sp) {
split(sopath, asopath, ":")
for (dir in asopath) {
fn = asopath[dir] "/" name
sp = asopath[dir] "\n\t" sp
while ((getline ln < fn) > 0) {
found = 1
head = head (head?"\n":"") ln
}
if (found) break
}
if (!found) {
printf "Couldn't source %s; looked in:\n\t%s", name, sp
dead = 127
exit
}
}
|
