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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
//! Port of `_regex_words` from
//! `Completion/Base/Utility/_regex_words`.
//!
//! Full upstream body (52 lines, abridged):
//! ```text
//! sh: 1 #autoload
//! sh: 4 local term=$'\0'
//! sh: 6 while getopts "t:" opt; do … -t TERM
//! sh:17 shift $(( OPTIND - 1 ))
//! sh:18 local tag=$1 desc=$2; shift 2
//! sh:20 if (( $# )); then reply=( "(" ) else reply=( ); return; fi
//! sh:34 if [[ $term = $'\0' ]]; then
//! sh:28 matches=":${tag}:${desc}:(( "; end="))"
//! sh:29 else matches=":${tag}:${desc}:_values -s ${term} ${desc}"
//! sh:32 for word_i in argv ...
//! sh:41 reply += /pattern/
//! sh:42 matches += word(:desc?)
//! sh:48 reply += /[]/ matches end )
//! ```
//!
//! Generates `$reply` array entries for `_regex_arguments` callers.
//! Translates the human-friendly "word:description:action" spec
//! into a regex/match pair.
use crate::ported::params::{getsparam, setaparam};
/// `_regex_words` — emit `( /word$term/ … /[]/ matches )` into
/// `$reply` for `_regex_arguments` consumption.
pub fn _regex_words(args: &[String]) -> i32 {
let _fn_scope = crate::compsys::ported::shared::FnScope::enter("_regex_words");
let mut term = "\0".to_string();
let mut idx = 0usize;
// sh:6-15 -t<term>
while idx + 1 < args.len() {
if args[idx] == "-t" {
term = args[idx + 1].clone();
idx += 2;
} else {
break;
}
}
// sh:18
if args.len() < idx + 2 {
setaparam("reply", Vec::new());
return 0;
}
let tag = args[idx].clone();
let desc = args[idx + 1].clone();
let words_start = idx + 2;
let word_args: &[String] = &args[words_start..];
// sh:20
if word_args.is_empty() {
setaparam("reply", Vec::new());
return 0;
}
let mut reply: Vec<String> = vec!["(".to_string()];
// sh:34
let (mut matches, end): (String, String) = if term == "\0" {
(format!(":{}:{}:(( ", tag, desc), "))".to_string())
} else {
let q = shell_quote(&term);
let qd = shell_quote(&desc);
(
format!(":{}:{}:_values -s {} {}", tag, desc, q, qd),
String::new(),
)
};
// sh:41-47
for arg in word_args {
// sh:42 — `wds=(${(s.:.)argv[i]})`. An UNQUOTED split in an
// array assignment drops empty fields (`a::b` → `(a b)`), and it
// splits at EVERY `:`, so `wds[3]` is exactly the third field —
// not "the rest of the string". `splitn(3, ':')` folded any
// trailing fields into `wds[3]`.
let wds: Vec<&str> = arg.split(':').filter(|f| !f.is_empty()).collect();
let w0 = wds.first().copied().unwrap_or("");
let w1 = wds.get(1).copied().unwrap_or("");
let w2 = wds.get(2).copied().unwrap_or("");
// sh:43 regex form: /word${term}/ with `*` → `[^term]#`
let class = if term == "\0" {
"[^\0]#".to_string()
} else {
format!("[^{}]#", term)
};
let regex = format!("/{}{}/", w0.replace('*', &class), term);
reply.push(regex);
// sh:45/47 — accumulate matches text. `$matches` ends up as an
// `_alternative` action (`(( w1\:d1 w2\:d2 ))` / `_values …`)
// that is later `eval`-split into words, so upstream
// BACKSLASH-ESCAPES every character that would otherwise break
// that split:
// sh:45 ${wds[2]//(#m)[: \(\)]/\\$MATCH} → `:`, ` `, `(`, `)`
// sh:47 ${…//(#m)[:\[\]]/\\$MATCH} → `:`, `[`, `]`
// The port emitted the description raw, so a multi-word one
// (`add PKCS11 profile to the token`) split at its first space
// and every `p11-kit <TAB>` description was truncated to one
// word.
if term == "\0" {
// sh:45 — `matches+="${wds[1]//\*}${wds[2]:+\\:…} "`.
let mut m = w0.replace('*', "");
if !w1.is_empty() {
m.push_str("\\:");
m.push_str(&backslash_escape(w1, &[':', ' ', '(', ')']));
}
m.push(' ');
matches.push_str(&m);
} else {
// sh:47 — `matches+=" ${(q)…}\\[${(q)…}\\]"`.
matches.push_str(&format!(
" {}\\[{}\\]",
shell_quote(&backslash_escape(&w0.replace('*', ""), &[':', '[', ']'])),
shell_quote(&backslash_escape(w1, &[':', '[', ']'])),
));
}
// sh:49 — `eval "reply+=($wds[3])"`. This is an ARRAY LITERAL
// eval, so a missing third field appends NOTHING (`reply+=()`)
// and a multi-word one appends one element PER WORD. Pushing
// `w2` unconditionally inserted an empty `''` element after
// every word: `_p11-kit`'s 14 commands produced a 40-element
// `$reply` instead of 30, and `zregexparse` stopped at the
// first `''` with `invalid regex : ` — `p11-kit <TAB>` lost the
// whole subcommand listing.
if !w2.is_empty() {
reply.extend(crate::compsys::ported::eval_action_words(w2));
}
// sh:50
reply.push("|".to_string());
}
// sh:52
reply.push("/[]/".to_string());
reply.push(format!("{}{}", matches, end));
reply.push(")".to_string());
setaparam("reply", reply);
0
}
/// zsh `${v//(#m)[…]/\\$MATCH}` — prefix every character in `chars`
/// with a backslash (sh:45 / sh:47).
fn backslash_escape(s: &str, chars: &[char]) -> String {
let mut out = String::with_capacity(s.len());
for c in s.chars() {
if chars.contains(&c) {
out.push('\\');
}
out.push(c);
}
out
}
/// Approximate zsh `${(q)v}` quoting — wrap with single quotes,
/// escape any embedded single quotes.
fn shell_quote(s: &str) -> String {
let esc = s.replace('\'', "'\\''");
format!("'{}'", esc)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn empty_args_clears_reply() {
let _g = crate::test_util::global_state_lock();
assert_eq!(_regex_words(&[]), 0);
let reply = crate::ported::params::getaparam("reply").unwrap_or_default();
assert!(reply.is_empty());
}
#[test]
fn emits_reply_for_simple_spec() {
let _g = crate::test_util::global_state_lock();
let _ = _regex_words(&[
"options".to_string(),
"option name".to_string(),
"foo:my foo:".to_string(),
"bar:my bar:".to_string(),
]);
let reply = crate::ported::params::getaparam("reply").unwrap_or_default();
assert!(reply.first().map(|s| s == "(").unwrap_or(false));
assert!(reply.last().map(|s| s == ")").unwrap_or(false));
let _ = getsparam("PREFIX");
}
}