Andrew's git - gitweb.git/blob

8d7e62e2a523d88be58b9171911b10af36a80dde
   1#include "cache.h"
   2#include "config.h"
   3#include "userdiff.h"
   4#include "attr.h"
   5
   6static struct userdiff_driver *drivers;
   7static int ndrivers;
   8static 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]+" }
  16static struct userdiff_driver builtin_drivers[] = {
  17IPATTERN("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         "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
  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].*)$",
  31         /* -- */
  32         "[a-zA-Z][a-zA-Z0-9_]*"
  33         "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
  34         /* numbers and format statements like 2E14.4, or ES12.6, 9X.
  35          * Don't worry about format statements without leading digits since
  36          * they would have been matched above as a variable anyway. */
  37         "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
  38         "|//|\\*\\*|::|[/<>=]="),
  39IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
  40         "[^ \t-]+"),
  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}"),
  50PATTERNS("html", "^[ \t]*(<[Hh][1-6]([ \t].*)?>.*)$",
  51         "[^<>= \t]+"),
  52PATTERNS("java",
  53         "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
  54         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
  55         /* -- */
  56         "[a-zA-Z_][a-zA-Z0-9_]*"
  57         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  58         "|[-+*/<>%&^|=!]="
  59         "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
  60PATTERNS("matlab",
  61         "^[[:space:]]*((classdef|function)[[:space:]].*)$|^%%[[:space:]].*$",
  62         "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
  63PATTERNS("objc",
  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_].*)$\n"
  68         /* C functions */
  69         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
  70         /* Objective-C class/protocol definitions */
  71         "^(@(implementation|interface|protocol)[ \t].*)$",
  72         /* -- */
  73         "[a-zA-Z_][a-zA-Z0-9_]*"
  74         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  75         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
  76PATTERNS("pascal",
  77         "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|"
  78                "implementation|initialization|finalization)[ \t]*.*)$"
  79         "\n"
  80         "^(.*=[ \t]*(class|record).*)$",
  81         /* -- */
  82         "[a-zA-Z_][a-zA-Z0-9_]*"
  83         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
  84         "|<>|<=|>=|:=|\\.\\."),
  85PATTERNS("perl",
  86         "^package .*\n"
  87         "^sub [[:alnum:]_':]+[ \t]*"
  88                "(\\([^)]*\\)[ \t]*)?" /* prototype */
  89                /*
  90                 * Attributes.  A regex can't count nested parentheses,
  91                 * so just slurp up whatever we see, taking care not
  92                 * to accept lines like "sub foo; # defined elsewhere".
  93                 *
  94                 * An attribute could contain a semicolon, but at that
  95                 * point it seems reasonable enough to give up.
  96                 */
  97                "(:[^;#]*)?"
  98                "(\\{[ \t]*)?" /* brace can come here or on the next line */
  99                "(#.*)?$\n" /* comment */
 100         "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
 101                "(\\{[ \t]*)?" /* brace can come here or on the next line */
 102                "(#.*)?$\n"
 103         "^=head[0-9] .*",      /* POD */
 104         /* -- */
 105         "[[:alpha:]_'][[:alnum:]_']*"
 106         "|0[xb]?[0-9a-fA-F_]*"
 107         /* taking care not to interpret 3..5 as (3.)(.5) */
 108         "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
 109         "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
 110         "|&&=|\\|\\|=|//=|\\*\\*="
 111         "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
 112         "|[-+*/%.^&<>=!|]="
 113         "|=~|!~"
 114         "|<<|<>|<=>|>>"),
 115PATTERNS("php",
 116         "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
 117         "^[\t ]*((((final|abstract)[\t ]+)?class|interface|trait).*)$",
 118         /* -- */
 119         "[a-zA-Z_][a-zA-Z0-9_]*"
 120         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
 121         "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
 122PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
 123         /* -- */
 124         "[a-zA-Z_][a-zA-Z0-9_]*"
 125         "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
 126         "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
 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-)?."
 132         "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
 133PATTERNS("rust",
 134         "^[\t ]*((pub(\\([^\\)]+\\))?[\t ]+)?((async|const|unsafe|extern([\t ]+\"[^\"]+\"))[\t ]+)?(struct|enum|union|mod|trait|fn|impl(<.+>)?)[ \t]+[^;]*)$",
 135         /* -- */
 136         "[a-zA-Z_][a-zA-Z0-9_]*"
 137         "|[-+_0-9.eE]+(f32|f64|u8|u16|u32|u64|u128|usize|i8|i16|i32|i64|i128|isize)?"
 138         "|0[box]?[0-9a-fA-F_]+(u8|u16|u32|u64|u128|usize|i8|i16|i32|i64|i128|isize)?"
 139         "|[-+*\\/<>%&^|=!:]=|<<=?|>>=?|&&|\\|\\||->|=>|\\.{2}=|\\.{3}|::"),
 140PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
 141         "[={}\"]|[^={}\" \t]+"),
 142PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
 143         "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
 144PATTERNS("cpp",
 145         /* Jump targets or access declarations */
 146         "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
 147         /* functions/methods, variables, and compounds at top level */
 148         "^((::[[:space:]]*)?[A-Za-z_].*)$",
 149         /* -- */
 150         "[a-zA-Z_][a-zA-Z0-9_]*"
 151         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
 152         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
 153PATTERNS("csharp",
 154         /* Keywords */
 155         "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
 156         /* Methods and constructors */
 157         "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe|async)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
 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]+.*)$",
 164         /* -- */
 165         "[a-zA-Z_][a-zA-Z0-9_]*"
 166         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
 167         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
 168IPATTERN("css",
 169         "![:;][[:space:]]*$\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),
 180{ "default", NULL, -1, { NULL, 0 } },
 181};
 182#undef PATTERNS
 183#undef IPATTERN
 184
 185static struct userdiff_driver driver_true = {
 186        "diff=true",
 187        NULL,
 188        0,
 189        { NULL, 0 }
 190};
 191
 192static struct userdiff_driver driver_false = {
 193        "!diff",
 194        NULL,
 195        1,
 196        { NULL, 0 }
 197};
 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
 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;
 221        return 0;
 222}
 223
 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);
 230        return 0;
 231}
 232
 233static int parse_bool(int *b, const char *k, const char *v)
 234{
 235        *b = git_config_bool(k, v);
 236        return 0;
 237}
 238
 239int userdiff_config(const char *k, const char *v)
 240{
 241        struct userdiff_driver *drv;
 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        }
 256
 257        if (!strcmp(type, "funcname"))
 258                return parse_funcname(&drv->funcname, k, v, 0);
 259        if (!strcmp(type, "xfuncname"))
 260                return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
 261        if (!strcmp(type, "binary"))
 262                return parse_tristate(&drv->binary, k, v);
 263        if (!strcmp(type, "command"))
 264                return git_config_string(&drv->external, k, v);
 265        if (!strcmp(type, "textconv"))
 266                return git_config_string(&drv->textconv, k, v);
 267        if (!strcmp(type, "cachetextconv"))
 268                return parse_bool(&drv->textconv_want_cache, k, v);
 269        if (!strcmp(type, "wordregex"))
 270                return git_config_string(&drv->word_regex, k, v);
 271
 272        return 0;
 273}
 274
 275struct userdiff_driver *userdiff_find_by_name(const char *name)
 276{
 277        int len = strlen(name);
 278        return userdiff_find_by_namelen(name, len);
 279}
 280
 281struct userdiff_driver *userdiff_find_by_path(struct index_state *istate,
 282                                              const char *path)
 283{
 284        static struct attr_check *check;
 285
 286        if (!check)
 287                check = attr_check_initl("diff", NULL);
 288        if (!path)
 289                return NULL;
 290        git_check_attr(istate, path, check);
 291
 292        if (ATTR_TRUE(check->items[0].value))
 293                return &driver_true;
 294        if (ATTR_FALSE(check->items[0].value))
 295                return &driver_false;
 296        if (ATTR_UNSET(check->items[0].value))
 297                return NULL;
 298        return userdiff_find_by_name(check->items[0].value);
 299}
 300
 301struct userdiff_driver *userdiff_get_textconv(struct repository *r,
 302                                              struct userdiff_driver *driver)
 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);
 312                notes_cache_init(r, c, name.buf, driver->textconv);
 313                driver->textconv_cache = c;
 314                strbuf_release(&name);
 315        }
 316
 317        return driver;
 318}