userdiff: add built-in pattern for rust
[git/git.git] / userdiff.c
CommitLineData
d9bae1a1 1#include "cache.h"
b2141fc1 2#include "config.h"
be58e70d 3#include "userdiff.h"
be58e70d
JK
4#include "attr.h"
5
6static struct userdiff_driver *drivers;
7static int ndrivers;
8static int drivers_alloc;
9
ae3b970a 10#define PATTERNS(name, pattern, word_regex) \
664d44ee
JN
11 { name, NULL, -1, { pattern, REG_EXTENDED }, \
12 word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
909a5494 13#define IPATTERN(name, pattern, word_regex) \
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14 { name, NULL, -1, { pattern, REG_EXTENDED | REG_ICASE }, \
15 word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
be58e70d 16static struct userdiff_driver builtin_drivers[] = {
e90d065e 17IPATTERN("ada",
39a87a29 18 "!^(.*[ \t])?(is[ \t]+new|renames|is[ \t]+separate)([ \t].*)?$\n"
e90d065e
AJ
19 "!^[ \t]*with[ \t].*$\n"
20 "^[ \t]*((procedure|function)[ \t]+.*)$\n"
21 "^[ \t]*((package|protected|task)[ \t]+.*)$",
22 /* -- */
23 "[a-zA-Z][a-zA-Z0-9_]*"
39a87a29 24 "|[-+]?[0-9][0-9#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
e90d065e 25 "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
909a5494
BC
26IPATTERN("fortran",
27 "!^([C*]|[ \t]*!)\n"
28 "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
29 "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA"
30 "|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$",
31 /* -- */
32 "[a-zA-Z][a-zA-Z0-9_]*"
33 "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
34 /* numbers and format statements like 2E14.4, or ES12.6, 9X.
35 * Don't worry about format statements without leading digits since
36 * they would have been matched above as a variable anyway. */
37 "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
664d44ee 38 "|//|\\*\\*|::|[/<>=]="),
69f9c87d
ZB
39IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
40 "[^ \t-]+"),
1dbf0c0a
AG
41PATTERNS("golang",
42 /* Functions */
43 "^[ \t]*(func[ \t]*.*(\\{[ \t]*)?)\n"
44 /* Structs and interfaces */
45 "^[ \t]*(type[ \t].*(struct|interface)[ \t]*(\\{[ \t]*)?)",
46 /* -- */
47 "[a-zA-Z_][a-zA-Z0-9_]*"
48 "|[-+0-9.eE]+i?|0[xX]?[0-9a-fA-F]+i?"
49 "|[-+*/<>%&^|=!:]=|--|\\+\\+|<<=?|>>=?|&\\^=?|&&|\\|\\||<-|\\.{3}"),
9c03caca 50PATTERNS("html", "^[ \t]*(<[Hh][1-6]([ \t].*)?>.*)$",
664d44ee 51 "[^<>= \t]+"),
80c49c3d 52PATTERNS("java",
be58e70d 53 "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
959e2e64
PB
54 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
55 /* -- */
80c49c3d
TR
56 "[a-zA-Z_][a-zA-Z0-9_]*"
57 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
58 "|[-+*/<>%&^|=!]="
664d44ee 59 "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
53b10a14
GH
60PATTERNS("matlab",
61 "^[[:space:]]*((classdef|function)[[:space:]].*)$|^%%[[:space:]].*$",
62 "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
80c49c3d 63PATTERNS("objc",
be58e70d
JK
64 /* Negate C statements that can look like functions */
65 "!^[ \t]*(do|for|if|else|return|switch|while)\n"
66 /* Objective-C methods */
67 "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
68 /* C functions */
959e2e64 69 "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
be58e70d 70 /* Objective-C class/protocol definitions */
80c49c3d
TR
71 "^(@(implementation|interface|protocol)[ \t].*)$",
72 /* -- */
73 "[a-zA-Z_][a-zA-Z0-9_]*"
74 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
664d44ee 75 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
80c49c3d 76PATTERNS("pascal",
ad5b6942 77 "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|"
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78 "implementation|initialization|finalization)[ \t]*.*)$"
79 "\n"
80c49c3d
TR
80 "^(.*=[ \t]*(class|record).*)$",
81 /* -- */
82 "[a-zA-Z_][a-zA-Z0-9_]*"
83 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
664d44ee 84 "|<>|<=|>=|:=|\\.\\."),
71a5d4bc 85PATTERNS("perl",
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JN
86 "^package .*\n"
87 "^sub [[:alnum:]_':]+[ \t]*"
88 "(\\([^)]*\\)[ \t]*)?" /* prototype */
89 /*
90 * Attributes. A regex can't count nested parentheses,
91 * so just slurp up whatever we see, taking care not
92 * to accept lines like "sub foo; # defined elsewhere".
93 *
94 * An attribute could contain a semicolon, but at that
95 * point it seems reasonable enough to give up.
96 */
97 "(:[^;#]*)?"
98 "(\\{[ \t]*)?" /* brace can come here or on the next line */
99 "(#.*)?$\n" /* comment */
f143d9c6 100 "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
ea2ca449
JN
101 "(\\{[ \t]*)?" /* brace can come here or on the next line */
102 "(#.*)?$\n"
12f0967a 103 "^=head[0-9] .*", /* POD */
71a5d4bc
JN
104 /* -- */
105 "[[:alpha:]_'][[:alnum:]_']*"
106 "|0[xb]?[0-9a-fA-F_]*"
107 /* taking care not to interpret 3..5 as (3.)(.5) */
108 "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
109 "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
110 "|&&=|\\|\\|=|//=|\\*\\*="
111 "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
112 "|[-+*/%.^&<>=!|]="
113 "|=~|!~"
664d44ee 114 "|<<|<>|<=>|>>"),
6d2f208c
BS
115PATTERNS("php",
116 "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
1ab63164 117 "^[\t ]*((((final|abstract)[\t ]+)?class|interface|trait).*)$",
80c49c3d
TR
118 /* -- */
119 "[a-zA-Z_][a-zA-Z0-9_]*"
120 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
664d44ee 121 "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
80c49c3d
TR
122PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
123 /* -- */
124 "[a-zA-Z_][a-zA-Z0-9_]*"
125 "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
664d44ee 126 "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
80c49c3d
TR
127 /* -- */
128PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
129 /* -- */
130 "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
131 "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
664d44ee 132 "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
d74e7860
MAL
133PATTERNS("rust",
134 "^[\t ]*((pub(\\([^\\)]+\\))?[\t ]+)?((async|const|unsafe|extern([\t ]+\"[^\"]+\"))[\t ]+)?(struct|enum|union|mod|trait|fn|impl(<.+>)?)[ \t]+[^;]*)$",
135 /* -- */
136 "[a-zA-Z_][a-zA-Z0-9_]*"
137 "|[-+_0-9.eE]+(f32|f64|u8|u16|u32|u64|u128|usize|i8|i16|i32|i64|i128|isize)?"
138 "|0[box]?[0-9a-fA-F_]+(u8|u16|u32|u64|u128|usize|i8|i16|i32|i64|i128|isize)?"
139 "|[-+*\\/<>%&^|=!:]=|<<=?|>>=?|&&|\\|\\||->|=>|\\.{2}=|\\.{3}|::"),
80c49c3d
TR
140PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
141 "[={}\"]|[^={}\" \t]+"),
142PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
664d44ee 143 "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
80c49c3d
TR
144PATTERNS("cpp",
145 /* Jump targets or access declarations */
8a2e8da3
JS
146 "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
147 /* functions/methods, variables, and compounds at top level */
148 "^((::[[:space:]]*)?[A-Za-z_].*)$",
80c49c3d
TR
149 /* -- */
150 "[a-zA-Z_][a-zA-Z0-9_]*"
abf8f986 151 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
407e07f2 152 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
b221207d
PO
153PATTERNS("csharp",
154 /* Keywords */
155 "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
156 /* Methods and constructors */
a12cec99 157 "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe|async)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
b221207d
PO
158 /* Properties */
159 "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
160 /* Type definitions */
161 "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
162 /* Namespace */
163 "^[ \t]*(namespace[ \t]+.*)$",
164 /* -- */
165 "[a-zA-Z_][a-zA-Z0-9_]*"
166 "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
664d44ee 167 "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
0719f3ee
WD
168IPATTERN("css",
169 "![:;][[:space:]]*$\n"
170 "^[_a-z0-9].*$",
171 /* -- */
172 /*
173 * This regex comes from W3C CSS specs. Should theoretically also
174 * allow ISO 10646 characters U+00A0 and higher,
175 * but they are not handled in this regex.
176 */
177 "-?[_a-zA-Z][-_a-zA-Z0-9]*" /* identifiers */
178 "|-?[0-9]+|\\#[0-9a-fA-F]+" /* numbers */
179),
122aa6f9 180{ "default", NULL, -1, { NULL, 0 } },
be58e70d 181};
80c49c3d 182#undef PATTERNS
909a5494 183#undef IPATTERN
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184
185static struct userdiff_driver driver_true = {
186 "diff=true",
187 NULL,
122aa6f9 188 0,
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189 { NULL, 0 }
190};
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191
192static struct userdiff_driver driver_false = {
193 "!diff",
194 NULL,
122aa6f9 195 1,
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196 { NULL, 0 }
197};
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198
199static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
200{
201 int i;
202 for (i = 0; i < ndrivers; i++) {
203 struct userdiff_driver *drv = drivers + i;
204 if (!strncmp(drv->name, k, len) && !drv->name[len])
205 return drv;
206 }
207 for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
208 struct userdiff_driver *drv = builtin_drivers + i;
209 if (!strncmp(drv->name, k, len) && !drv->name[len])
210 return drv;
211 }
212 return NULL;
213}
214
be58e70d
JK
215static int parse_funcname(struct userdiff_funcname *f, const char *k,
216 const char *v, int cflags)
217{
218 if (git_config_string(&f->pattern, k, v) < 0)
219 return -1;
220 f->cflags = cflags;
6680a087 221 return 0;
be58e70d
JK
222}
223
122aa6f9
JK
224static int parse_tristate(int *b, const char *k, const char *v)
225{
226 if (v && !strcasecmp(v, "auto"))
227 *b = -1;
228 else
229 *b = git_config_bool(k, v);
6680a087 230 return 0;
122aa6f9
JK
231}
232
d9bae1a1
JK
233static int parse_bool(int *b, const char *k, const char *v)
234{
235 *b = git_config_bool(k, v);
6680a087 236 return 0;
d9bae1a1
JK
237}
238
c7534ef4 239int userdiff_config(const char *k, const char *v)
be58e70d
JK
240{
241 struct userdiff_driver *drv;
0a5987fe
JK
242 const char *name, *type;
243 int namelen;
244
245 if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
246 return 0;
247
248 drv = userdiff_find_by_namelen(name, namelen);
249 if (!drv) {
250 ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
251 drv = &drivers[ndrivers++];
252 memset(drv, 0, sizeof(*drv));
253 drv->name = xmemdupz(name, namelen);
254 drv->binary = -1;
255 }
be58e70d 256
0a5987fe 257 if (!strcmp(type, "funcname"))
be58e70d 258 return parse_funcname(&drv->funcname, k, v, 0);
0a5987fe 259 if (!strcmp(type, "xfuncname"))
be58e70d 260 return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
0a5987fe 261 if (!strcmp(type, "binary"))
122aa6f9 262 return parse_tristate(&drv->binary, k, v);
0a5987fe 263 if (!strcmp(type, "command"))
6680a087 264 return git_config_string(&drv->external, k, v);
0a5987fe 265 if (!strcmp(type, "textconv"))
6680a087 266 return git_config_string(&drv->textconv, k, v);
0a5987fe 267 if (!strcmp(type, "cachetextconv"))
d9bae1a1 268 return parse_bool(&drv->textconv_want_cache, k, v);
0a5987fe 269 if (!strcmp(type, "wordregex"))
6680a087 270 return git_config_string(&drv->word_regex, k, v);
be58e70d
JK
271
272 return 0;
273}
274
3b335762
NTND
275struct userdiff_driver *userdiff_find_by_name(const char *name)
276{
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JK
277 int len = strlen(name);
278 return userdiff_find_by_namelen(name, len);
279}
280
acd00ea0
NTND
281struct userdiff_driver *userdiff_find_by_path(struct index_state *istate,
282 const char *path)
be58e70d 283{
2aef63d3 284 static struct attr_check *check;
be58e70d 285
2aef63d3
JH
286 if (!check)
287 check = attr_check_initl("diff", NULL);
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288 if (!path)
289 return NULL;
11877b9e 290 git_check_attr(istate, path, check);
be58e70d 291
2aef63d3 292 if (ATTR_TRUE(check->items[0].value))
be58e70d 293 return &driver_true;
2aef63d3 294 if (ATTR_FALSE(check->items[0].value))
be58e70d 295 return &driver_false;
2aef63d3 296 if (ATTR_UNSET(check->items[0].value))
be58e70d 297 return NULL;
2aef63d3 298 return userdiff_find_by_name(check->items[0].value);
be58e70d 299}
3813e690 300
bd7ad45b
NTND
301struct userdiff_driver *userdiff_get_textconv(struct repository *r,
302 struct userdiff_driver *driver)
3813e690
JK
303{
304 if (!driver->textconv)
305 return NULL;
306
307 if (driver->textconv_want_cache && !driver->textconv_cache) {
308 struct notes_cache *c = xmalloc(sizeof(*c));
309 struct strbuf name = STRBUF_INIT;
310
311 strbuf_addf(&name, "textconv/%s", driver->name);
bd7ad45b 312 notes_cache_init(r, c, name.buf, driver->textconv);
3813e690 313 driver->textconv_cache = c;
460c7eb2 314 strbuf_release(&name);
3813e690
JK
315 }
316
317 return driver;
318}