Merge branch 'master' of github.com:Softcatala/git-po
[git] / userdiff.c
1 #include "cache.h"
2 #include "config.h"
3 #include "userdiff.h"
4 #include "attr.h"
5
6 static struct userdiff_driver *drivers;
7 static int ndrivers;
8 static int drivers_alloc;
9
10 #define PATTERNS(name, pattern, word_regex)                     \
11         { name, NULL, -1, { pattern, REG_EXTENDED },            \
12           word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
13 #define IPATTERN(name, pattern, word_regex)                     \
14         { name, NULL, -1, { pattern, REG_EXTENDED | REG_ICASE }, \
15           word_regex "|[^[:space:]]|[\xc0-\xff][\x80-\xbf]+" }
16 static struct userdiff_driver builtin_drivers[] = {
17 IPATTERN("ada",
18          "!^(.*[ \t])?(is[ \t]+new|renames|is[ \t]+separate)([ \t].*)?$\n"
19          "!^[ \t]*with[ \t].*$\n"
20          "^[ \t]*((procedure|function)[ \t]+.*)$\n"
21          "^[ \t]*((package|protected|task)[ \t]+.*)$",
22          /* -- */
23          "[a-zA-Z][a-zA-Z0-9_]*"
24          "|[-+]?[0-9][0-9#_.aAbBcCdDeEfF]*([eE][+-]?[0-9_]+)?"
25          "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
26 PATTERNS("dts",
27          "!;\n"
28          "!=\n"
29          /* lines beginning with a word optionally preceded by '&' or the root */
30          "^[ \t]*((/[ \t]*\\{|&?[a-zA-Z_]).*)",
31          /* -- */
32          /* Property names and math operators */
33          "[a-zA-Z0-9,._+?#-]+"
34          "|[-+*/%&^|!~]|>>|<<|&&|\\|\\|"),
35 PATTERNS("elixir",
36          "^[ \t]*((def(macro|module|impl|protocol|p)?|test)[ \t].*)$",
37          /* -- */
38          /* Atoms, names, and module attributes */
39          "[@:]?[a-zA-Z0-9@_?!]+"
40          /* Numbers with specific base */
41          "|[-+]?0[xob][0-9a-fA-F]+"
42          /* Numbers */
43          "|[-+]?[0-9][0-9_.]*([eE][-+]?[0-9_]+)?"
44          /* Operators and atoms that represent them */
45          "|:?(\\+\\+|--|\\.\\.|~~~|<>|\\^\\^\\^|<?\\|>|<<<?|>?>>|<<?~|~>?>|<~>|<=|>=|===?|!==?|=~|&&&?|\\|\\|\\|?|=>|<-|\\\\\\\\|->)"
46          /* Not real operators, but should be grouped */
47          "|:?%[A-Za-z0-9_.]\\{\\}?"),
48 IPATTERN("fortran",
49          "!^([C*]|[ \t]*!)\n"
50          "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
51          "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA"
52                 "|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$",
53          /* -- */
54          "[a-zA-Z][a-zA-Z0-9_]*"
55          "|\\.([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])\\."
56          /* numbers and format statements like 2E14.4, or ES12.6, 9X.
57           * Don't worry about format statements without leading digits since
58           * they would have been matched above as a variable anyway. */
59          "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
60          "|//|\\*\\*|::|[/<>=]="),
61 IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
62          "[^ \t-]+"),
63 PATTERNS("golang",
64          /* Functions */
65          "^[ \t]*(func[ \t]*.*(\\{[ \t]*)?)\n"
66          /* Structs and interfaces */
67          "^[ \t]*(type[ \t].*(struct|interface)[ \t]*(\\{[ \t]*)?)",
68          /* -- */
69          "[a-zA-Z_][a-zA-Z0-9_]*"
70          "|[-+0-9.eE]+i?|0[xX]?[0-9a-fA-F]+i?"
71          "|[-+*/<>%&^|=!:]=|--|\\+\\+|<<=?|>>=?|&\\^=?|&&|\\|\\||<-|\\.{3}"),
72 PATTERNS("html", "^[ \t]*(<[Hh][1-6]([ \t].*)?>.*)$",
73          "[^<>= \t]+"),
74 PATTERNS("java",
75          "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
76          "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
77          /* -- */
78          "[a-zA-Z_][a-zA-Z0-9_]*"
79          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
80          "|[-+*/<>%&^|=!]="
81          "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
82 PATTERNS("markdown",
83          "^ {0,3}#{1,6}[ \t].*",
84          "[^<>= \t]+"),
85 PATTERNS("matlab",
86          /*
87           * Octave pattern is mostly the same as matlab, except that '%%%' and
88           * '##' can also be used to begin code sections, in addition to '%%'
89           * that is understood by both.
90           */
91          "^[[:space:]]*((classdef|function)[[:space:]].*)$|^(%%%?|##)[[:space:]].*$",
92          "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
93 PATTERNS("objc",
94          /* Negate C statements that can look like functions */
95          "!^[ \t]*(do|for|if|else|return|switch|while)\n"
96          /* Objective-C methods */
97          "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
98          /* C functions */
99          "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
100          /* Objective-C class/protocol definitions */
101          "^(@(implementation|interface|protocol)[ \t].*)$",
102          /* -- */
103          "[a-zA-Z_][a-zA-Z0-9_]*"
104          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
105          "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
106 PATTERNS("pascal",
107          "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|"
108                 "implementation|initialization|finalization)[ \t]*.*)$"
109          "\n"
110          "^(.*=[ \t]*(class|record).*)$",
111          /* -- */
112          "[a-zA-Z_][a-zA-Z0-9_]*"
113          "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
114          "|<>|<=|>=|:=|\\.\\."),
115 PATTERNS("perl",
116          "^package .*\n"
117          "^sub [[:alnum:]_':]+[ \t]*"
118                 "(\\([^)]*\\)[ \t]*)?" /* prototype */
119                 /*
120                  * Attributes.  A regex can't count nested parentheses,
121                  * so just slurp up whatever we see, taking care not
122                  * to accept lines like "sub foo; # defined elsewhere".
123                  *
124                  * An attribute could contain a semicolon, but at that
125                  * point it seems reasonable enough to give up.
126                  */
127                 "(:[^;#]*)?"
128                 "(\\{[ \t]*)?" /* brace can come here or on the next line */
129                 "(#.*)?$\n" /* comment */
130          "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
131                 "(\\{[ \t]*)?" /* brace can come here or on the next line */
132                 "(#.*)?$\n"
133          "^=head[0-9] .*",      /* POD */
134          /* -- */
135          "[[:alpha:]_'][[:alnum:]_']*"
136          "|0[xb]?[0-9a-fA-F_]*"
137          /* taking care not to interpret 3..5 as (3.)(.5) */
138          "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
139          "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
140          "|&&=|\\|\\|=|//=|\\*\\*="
141          "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
142          "|[-+*/%.^&<>=!|]="
143          "|=~|!~"
144          "|<<|<>|<=>|>>"),
145 PATTERNS("php",
146          "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
147          "^[\t ]*((((final|abstract)[\t ]+)?class|interface|trait).*)$",
148          /* -- */
149          "[a-zA-Z_][a-zA-Z0-9_]*"
150          "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
151          "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
152 PATTERNS("python", "^[ \t]*((class|(async[ \t]+)?def)[ \t].*)$",
153          /* -- */
154          "[a-zA-Z_][a-zA-Z0-9_]*"
155          "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
156          "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
157          /* -- */
158 PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
159          /* -- */
160          "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
161          "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
162          "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
163 PATTERNS("rust",
164          "^[\t ]*((pub(\\([^\\)]+\\))?[\t ]+)?((async|const|unsafe|extern([\t ]+\"[^\"]+\"))[\t ]+)?(struct|enum|union|mod|trait|fn|impl)[< \t]+[^;]*)$",
165          /* -- */
166          "[a-zA-Z_][a-zA-Z0-9_]*"
167          "|[0-9][0-9_a-fA-Fiosuxz]*(\\.([0-9]*[eE][+-]?)?[0-9_fF]*)?"
168          "|[-+*\\/<>%&^|=!:]=|<<=?|>>=?|&&|\\|\\||->|=>|\\.{2}=|\\.{3}|::"),
169 PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
170          "[={}\"]|[^={}\" \t]+"),
171 PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
172          "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
173 PATTERNS("cpp",
174          /* Jump targets or access declarations */
175          "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
176          /* functions/methods, variables, and compounds at top level */
177          "^((::[[:space:]]*)?[A-Za-z_].*)$",
178          /* -- */
179          "[a-zA-Z_][a-zA-Z0-9_]*"
180          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
181          "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
182 PATTERNS("csharp",
183          /* Keywords */
184          "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
185          /* Methods and constructors */
186          "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe|async)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
187          /* Properties */
188          "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
189          /* Type definitions */
190          "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
191          /* Namespace */
192          "^[ \t]*(namespace[ \t]+.*)$",
193          /* -- */
194          "[a-zA-Z_][a-zA-Z0-9_]*"
195          "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
196          "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
197 IPATTERN("css",
198          "![:;][[:space:]]*$\n"
199          "^[_a-z0-9].*$",
200          /* -- */
201          /*
202           * This regex comes from W3C CSS specs. Should theoretically also
203           * allow ISO 10646 characters U+00A0 and higher,
204           * but they are not handled in this regex.
205           */
206          "-?[_a-zA-Z][-_a-zA-Z0-9]*" /* identifiers */
207          "|-?[0-9]+|\\#[0-9a-fA-F]+" /* numbers */
208 ),
209 { "default", NULL, -1, { NULL, 0 } },
210 };
211 #undef PATTERNS
212 #undef IPATTERN
213
214 static struct userdiff_driver driver_true = {
215         "diff=true",
216         NULL,
217         0,
218         { NULL, 0 }
219 };
220
221 static struct userdiff_driver driver_false = {
222         "!diff",
223         NULL,
224         1,
225         { NULL, 0 }
226 };
227
228 static struct userdiff_driver *userdiff_find_by_namelen(const char *k, size_t len)
229 {
230         int i;
231         for (i = 0; i < ndrivers; i++) {
232                 struct userdiff_driver *drv = drivers + i;
233                 if (!strncmp(drv->name, k, len) && !drv->name[len])
234                         return drv;
235         }
236         for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
237                 struct userdiff_driver *drv = builtin_drivers + i;
238                 if (!strncmp(drv->name, k, len) && !drv->name[len])
239                         return drv;
240         }
241         return NULL;
242 }
243
244 static int parse_funcname(struct userdiff_funcname *f, const char *k,
245                 const char *v, int cflags)
246 {
247         if (git_config_string(&f->pattern, k, v) < 0)
248                 return -1;
249         f->cflags = cflags;
250         return 0;
251 }
252
253 static int parse_tristate(int *b, const char *k, const char *v)
254 {
255         if (v && !strcasecmp(v, "auto"))
256                 *b = -1;
257         else
258                 *b = git_config_bool(k, v);
259         return 0;
260 }
261
262 static int parse_bool(int *b, const char *k, const char *v)
263 {
264         *b = git_config_bool(k, v);
265         return 0;
266 }
267
268 int userdiff_config(const char *k, const char *v)
269 {
270         struct userdiff_driver *drv;
271         const char *name, *type;
272         size_t namelen;
273
274         if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
275                 return 0;
276
277         drv = userdiff_find_by_namelen(name, namelen);
278         if (!drv) {
279                 ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
280                 drv = &drivers[ndrivers++];
281                 memset(drv, 0, sizeof(*drv));
282                 drv->name = xmemdupz(name, namelen);
283                 drv->binary = -1;
284         }
285
286         if (!strcmp(type, "funcname"))
287                 return parse_funcname(&drv->funcname, k, v, 0);
288         if (!strcmp(type, "xfuncname"))
289                 return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
290         if (!strcmp(type, "binary"))
291                 return parse_tristate(&drv->binary, k, v);
292         if (!strcmp(type, "command"))
293                 return git_config_string(&drv->external, k, v);
294         if (!strcmp(type, "textconv"))
295                 return git_config_string(&drv->textconv, k, v);
296         if (!strcmp(type, "cachetextconv"))
297                 return parse_bool(&drv->textconv_want_cache, k, v);
298         if (!strcmp(type, "wordregex"))
299                 return git_config_string(&drv->word_regex, k, v);
300
301         return 0;
302 }
303
304 struct userdiff_driver *userdiff_find_by_name(const char *name)
305 {
306         int len = strlen(name);
307         return userdiff_find_by_namelen(name, len);
308 }
309
310 struct userdiff_driver *userdiff_find_by_path(struct index_state *istate,
311                                               const char *path)
312 {
313         static struct attr_check *check;
314
315         if (!check)
316                 check = attr_check_initl("diff", NULL);
317         if (!path)
318                 return NULL;
319         git_check_attr(istate, path, check);
320
321         if (ATTR_TRUE(check->items[0].value))
322                 return &driver_true;
323         if (ATTR_FALSE(check->items[0].value))
324                 return &driver_false;
325         if (ATTR_UNSET(check->items[0].value))
326                 return NULL;
327         return userdiff_find_by_name(check->items[0].value);
328 }
329
330 struct userdiff_driver *userdiff_get_textconv(struct repository *r,
331                                               struct userdiff_driver *driver)
332 {
333         if (!driver->textconv)
334                 return NULL;
335
336         if (driver->textconv_want_cache && !driver->textconv_cache) {
337                 struct notes_cache *c = xmalloc(sizeof(*c));
338                 struct strbuf name = STRBUF_INIT;
339
340                 strbuf_addf(&name, "textconv/%s", driver->name);
341                 notes_cache_init(r, c, name.buf, driver->textconv);
342                 driver->textconv_cache = c;
343                 strbuf_release(&name);
344         }
345
346         return driver;
347 }