Andrew's git / gitweb.git / userdiff.c
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userdiff.con commit improve error page/httpd logging and file permissions (257c23d)
   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         "|=>|\\.\\.|\\*\\*|:=|/=|>=|<=|<<|>>|<>"),
  26PATTERNS("dts",
  27         "!;\n"
  28         /* lines beginning with a word optionally preceded by '&' or the root */
  29         "^[ \t]*((/|&?[a-zA-Z_]).*)",
  30         /* -- */
  31         /* Property names and math operators */
  32         "[a-zA-Z0-9,._+?#-]+"
  33         "|[-+*/%&^|!~]|>>|<<|&&|\\|\\|"),
  34IPATTERN("fortran",
  35         "!^([C*]|[ \t]*!)\n"
  36         "!^[ \t]*MODULE[ \t]+PROCEDURE[ \t]\n"
  37         "^[ \t]*((END[ \t]+)?(PROGRAM|MODULE|BLOCK[ \t]+DATA"
  38                "|([^'\" \t]+[ \t]+)*(SUBROUTINE|FUNCTION))[ \t]+[A-Z].*)$",
  39         /* -- */
  40         "[a-zA-Z][a-zA-Z0-9_]*"
  41         "|\\.([Ee][Qq]|[Nn][Ee]|[Gg][TtEe]|[Ll][TtEe]|[Tt][Rr][Uu][Ee]|[Ff][Aa][Ll][Ss][Ee]|[Aa][Nn][Dd]|[Oo][Rr]|[Nn]?[Ee][Qq][Vv]|[Nn][Oo][Tt])\\."
  42         /* numbers and format statements like 2E14.4, or ES12.6, 9X.
  43          * Don't worry about format statements without leading digits since
  44          * they would have been matched above as a variable anyway. */
  45         "|[-+]?[0-9.]+([AaIiDdEeFfLlTtXx][Ss]?[-+]?[0-9.]*)?(_[a-zA-Z0-9][a-zA-Z0-9_]*)?"
  46         "|//|\\*\\*|::|[/<>=]="),
  47IPATTERN("fountain", "^((\\.[^.]|(int|ext|est|int\\.?/ext|i/e)[. ]).*)$",
  48         "[^ \t-]+"),
  49PATTERNS("golang",
  50         /* Functions */
  51         "^[ \t]*(func[ \t]*.*(\\{[ \t]*)?)\n"
  52         /* Structs and interfaces */
  53         "^[ \t]*(type[ \t].*(struct|interface)[ \t]*(\\{[ \t]*)?)",
  54         /* -- */
  55         "[a-zA-Z_][a-zA-Z0-9_]*"
  56         "|[-+0-9.eE]+i?|0[xX]?[0-9a-fA-F]+i?"
  57         "|[-+*/<>%&^|=!:]=|--|\\+\\+|<<=?|>>=?|&\\^=?|&&|\\|\\||<-|\\.{3}"),
  58PATTERNS("html", "^[ \t]*(<[Hh][1-6]([ \t].*)?>.*)$",
  59         "[^<>= \t]+"),
  60PATTERNS("java",
  61         "!^[ \t]*(catch|do|for|if|instanceof|new|return|switch|throw|while)\n"
  62         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$",
  63         /* -- */
  64         "[a-zA-Z_][a-zA-Z0-9_]*"
  65         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  66         "|[-+*/<>%&^|=!]="
  67         "|--|\\+\\+|<<=?|>>>?=?|&&|\\|\\|"),
  68PATTERNS("matlab",
  69         /*
  70          * Octave pattern is mostly the same as matlab, except that '%%%' and
  71          * '##' can also be used to begin code sections, in addition to '%%'
  72          * that is understood by both.
  73          */
  74         "^[[:space:]]*((classdef|function)[[:space:]].*)$|^(%%%?|##)[[:space:]].*$",
  75         "[a-zA-Z_][a-zA-Z0-9_]*|[-+0-9.e]+|[=~<>]=|\\.[*/\\^']|\\|\\||&&"),
  76PATTERNS("objc",
  77         /* Negate C statements that can look like functions */
  78         "!^[ \t]*(do|for|if|else|return|switch|while)\n"
  79         /* Objective-C methods */
  80         "^[ \t]*([-+][ \t]*\\([ \t]*[A-Za-z_][A-Za-z_0-9* \t]*\\)[ \t]*[A-Za-z_].*)$\n"
  81         /* C functions */
  82         "^[ \t]*(([A-Za-z_][A-Za-z_0-9]*[ \t]+)+[A-Za-z_][A-Za-z_0-9]*[ \t]*\\([^;]*)$\n"
  83         /* Objective-C class/protocol definitions */
  84         "^(@(implementation|interface|protocol)[ \t].*)$",
  85         /* -- */
  86         "[a-zA-Z_][a-zA-Z0-9_]*"
  87         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
  88         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
  89PATTERNS("pascal",
  90         "^(((class[ \t]+)?(procedure|function)|constructor|destructor|interface|"
  91                "implementation|initialization|finalization)[ \t]*.*)$"
  92         "\n"
  93         "^(.*=[ \t]*(class|record).*)$",
  94         /* -- */
  95         "[a-zA-Z_][a-zA-Z0-9_]*"
  96         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
  97         "|<>|<=|>=|:=|\\.\\."),
  98PATTERNS("perl",
  99         "^package .*\n"
 100         "^sub [[:alnum:]_':]+[ \t]*"
 101                "(\\([^)]*\\)[ \t]*)?" /* prototype */
 102                /*
 103                 * Attributes.  A regex can't count nested parentheses,
 104                 * so just slurp up whatever we see, taking care not
 105                 * to accept lines like "sub foo; # defined elsewhere".
 106                 *
 107                 * An attribute could contain a semicolon, but at that
 108                 * point it seems reasonable enough to give up.
 109                 */
 110                "(:[^;#]*)?"
 111                "(\\{[ \t]*)?" /* brace can come here or on the next line */
 112                "(#.*)?$\n" /* comment */
 113         "^(BEGIN|END|INIT|CHECK|UNITCHECK|AUTOLOAD|DESTROY)[ \t]*"
 114                "(\\{[ \t]*)?" /* brace can come here or on the next line */
 115                "(#.*)?$\n"
 116         "^=head[0-9] .*",      /* POD */
 117         /* -- */
 118         "[[:alpha:]_'][[:alnum:]_']*"
 119         "|0[xb]?[0-9a-fA-F_]*"
 120         /* taking care not to interpret 3..5 as (3.)(.5) */
 121         "|[0-9a-fA-F_]+(\\.[0-9a-fA-F_]+)?([eE][-+]?[0-9_]+)?"
 122         "|=>|-[rwxoRWXOezsfdlpSugkbctTBMAC>]|~~|::"
 123         "|&&=|\\|\\|=|//=|\\*\\*="
 124         "|&&|\\|\\||//|\\+\\+|--|\\*\\*|\\.\\.\\.?"
 125         "|[-+*/%.^&<>=!|]="
 126         "|=~|!~"
 127         "|<<|<>|<=>|>>"),
 128PATTERNS("php",
 129         "^[\t ]*(((public|protected|private|static)[\t ]+)*function.*)$\n"
 130         "^[\t ]*((((final|abstract)[\t ]+)?class|interface|trait).*)$",
 131         /* -- */
 132         "[a-zA-Z_][a-zA-Z0-9_]*"
 133         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+"
 134         "|[-+*/<>%&^|=!.]=|--|\\+\\+|<<=?|>>=?|===|&&|\\|\\||::|->"),
 135PATTERNS("python", "^[ \t]*((class|def)[ \t].*)$",
 136         /* -- */
 137         "[a-zA-Z_][a-zA-Z0-9_]*"
 138         "|[-+0-9.e]+[jJlL]?|0[xX]?[0-9a-fA-F]+[lL]?"
 139         "|[-+*/<>%&^|=!]=|//=?|<<=?|>>=?|\\*\\*=?"),
 140         /* -- */
 141PATTERNS("ruby", "^[ \t]*((class|module|def)[ \t].*)$",
 142         /* -- */
 143         "(@|@@|\\$)?[a-zA-Z_][a-zA-Z0-9_]*"
 144         "|[-+0-9.e]+|0[xXbB]?[0-9a-fA-F]+|\\?(\\\\C-)?(\\\\M-)?."
 145         "|//=?|[-+*/<>%&^|=!]=|<<=?|>>=?|===|\\.{1,3}|::|[!=]~"),
 146PATTERNS("rust",
 147         "^[\t ]*((pub(\\([^\\)]+\\))?[\t ]+)?((async|const|unsafe|extern([\t ]+\"[^\"]+\"))[\t ]+)?(struct|enum|union|mod|trait|fn|impl)[< \t]+[^;]*)$",
 148         /* -- */
 149         "[a-zA-Z_][a-zA-Z0-9_]*"
 150         "|[0-9][0-9_a-fA-Fiosuxz]*(\\.([0-9]*[eE][+-]?)?[0-9_fF]*)?"
 151         "|[-+*\\/<>%&^|=!:]=|<<=?|>>=?|&&|\\|\\||->|=>|\\.{2}=|\\.{3}|::"),
 152PATTERNS("bibtex", "(@[a-zA-Z]{1,}[ \t]*\\{{0,1}[ \t]*[^ \t\"@',\\#}{~%]*).*$",
 153         "[={}\"]|[^={}\" \t]+"),
 154PATTERNS("tex", "^(\\\\((sub)*section|chapter|part)\\*{0,1}\\{.*)$",
 155         "\\\\[a-zA-Z@]+|\\\\.|[a-zA-Z0-9\x80-\xff]+"),
 156PATTERNS("cpp",
 157         /* Jump targets or access declarations */
 158         "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
 159         /* functions/methods, variables, and compounds at top level */
 160         "^((::[[:space:]]*)?[A-Za-z_].*)$",
 161         /* -- */
 162         "[a-zA-Z_][a-zA-Z0-9_]*"
 163         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
 164         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),
 165PATTERNS("csharp",
 166         /* Keywords */
 167         "!^[ \t]*(do|while|for|if|else|instanceof|new|return|switch|case|throw|catch|using)\n"
 168         /* Methods and constructors */
 169         "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe|async)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[<>@._[:alnum:]]+[ \t]*\\(.*\\))[ \t]*$\n"
 170         /* Properties */
 171         "^[ \t]*(((static|public|internal|private|protected|new|virtual|sealed|override|unsafe)[ \t]+)*[][<>@.~_[:alnum:]]+[ \t]+[@._[:alnum:]]+)[ \t]*$\n"
 172         /* Type definitions */
 173         "^[ \t]*(((static|public|internal|private|protected|new|unsafe|sealed|abstract|partial)[ \t]+)*(class|enum|interface|struct)[ \t]+.*)$\n"
 174         /* Namespace */
 175         "^[ \t]*(namespace[ \t]+.*)$",
 176         /* -- */
 177         "[a-zA-Z_][a-zA-Z0-9_]*"
 178         "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lL]?"
 179         "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->"),
 180IPATTERN("css",
 181         "![:;][[:space:]]*$\n"
 182         "^[_a-z0-9].*$",
 183         /* -- */
 184         /*
 185          * This regex comes from W3C CSS specs. Should theoretically also
 186          * allow ISO 10646 characters U+00A0 and higher,
 187          * but they are not handled in this regex.
 188          */
 189         "-?[_a-zA-Z][-_a-zA-Z0-9]*" /* identifiers */
 190         "|-?[0-9]+|\\#[0-9a-fA-F]+" /* numbers */
 191),
 192{ "default", NULL, -1, { NULL, 0 } },
 193};
 194#undef PATTERNS
 195#undef IPATTERN
 196
 197static struct userdiff_driver driver_true = {
 198        "diff=true",
 199        NULL,
 200        0,
 201        { NULL, 0 }
 202};
 203
 204static struct userdiff_driver driver_false = {
 205        "!diff",
 206        NULL,
 207        1,
 208        { NULL, 0 }
 209};
 210
 211static struct userdiff_driver *userdiff_find_by_namelen(const char *k, int len)
 212{
 213        int i;
 214        for (i = 0; i < ndrivers; i++) {
 215                struct userdiff_driver *drv = drivers + i;
 216                if (!strncmp(drv->name, k, len) && !drv->name[len])
 217                        return drv;
 218        }
 219        for (i = 0; i < ARRAY_SIZE(builtin_drivers); i++) {
 220                struct userdiff_driver *drv = builtin_drivers + i;
 221                if (!strncmp(drv->name, k, len) && !drv->name[len])
 222                        return drv;
 223        }
 224        return NULL;
 225}
 226
 227static int parse_funcname(struct userdiff_funcname *f, const char *k,
 228                const char *v, int cflags)
 229{
 230        if (git_config_string(&f->pattern, k, v) < 0)
 231                return -1;
 232        f->cflags = cflags;
 233        return 0;
 234}
 235
 236static int parse_tristate(int *b, const char *k, const char *v)
 237{
 238        if (v && !strcasecmp(v, "auto"))
 239                *b = -1;
 240        else
 241                *b = git_config_bool(k, v);
 242        return 0;
 243}
 244
 245static int parse_bool(int *b, const char *k, const char *v)
 246{
 247        *b = git_config_bool(k, v);
 248        return 0;
 249}
 250
 251int userdiff_config(const char *k, const char *v)
 252{
 253        struct userdiff_driver *drv;
 254        const char *name, *type;
 255        int namelen;
 256
 257        if (parse_config_key(k, "diff", &name, &namelen, &type) || !name)
 258                return 0;
 259
 260        drv = userdiff_find_by_namelen(name, namelen);
 261        if (!drv) {
 262                ALLOC_GROW(drivers, ndrivers+1, drivers_alloc);
 263                drv = &drivers[ndrivers++];
 264                memset(drv, 0, sizeof(*drv));
 265                drv->name = xmemdupz(name, namelen);
 266                drv->binary = -1;
 267        }
 268
 269        if (!strcmp(type, "funcname"))
 270                return parse_funcname(&drv->funcname, k, v, 0);
 271        if (!strcmp(type, "xfuncname"))
 272                return parse_funcname(&drv->funcname, k, v, REG_EXTENDED);
 273        if (!strcmp(type, "binary"))
 274                return parse_tristate(&drv->binary, k, v);
 275        if (!strcmp(type, "command"))
 276                return git_config_string(&drv->external, k, v);
 277        if (!strcmp(type, "textconv"))
 278                return git_config_string(&drv->textconv, k, v);
 279        if (!strcmp(type, "cachetextconv"))
 280                return parse_bool(&drv->textconv_want_cache, k, v);
 281        if (!strcmp(type, "wordregex"))
 282                return git_config_string(&drv->word_regex, k, v);
 283
 284        return 0;
 285}
 286
 287struct userdiff_driver *userdiff_find_by_name(const char *name)
 288{
 289        int len = strlen(name);
 290        return userdiff_find_by_namelen(name, len);
 291}
 292
 293struct userdiff_driver *userdiff_find_by_path(struct index_state *istate,
 294                                              const char *path)
 295{
 296        static struct attr_check *check;
 297
 298        if (!check)
 299                check = attr_check_initl("diff", NULL);
 300        if (!path)
 301                return NULL;
 302        git_check_attr(istate, path, check);
 303
 304        if (ATTR_TRUE(check->items[0].value))
 305                return &driver_true;
 306        if (ATTR_FALSE(check->items[0].value))
 307                return &driver_false;
 308        if (ATTR_UNSET(check->items[0].value))
 309                return NULL;
 310        return userdiff_find_by_name(check->items[0].value);
 311}
 312
 313struct userdiff_driver *userdiff_get_textconv(struct repository *r,
 314                                              struct userdiff_driver *driver)
 315{
 316        if (!driver->textconv)
 317                return NULL;
 318
 319        if (driver->textconv_want_cache && !driver->textconv_cache) {
 320                struct notes_cache *c = xmalloc(sizeof(*c));
 321                struct strbuf name = STRBUF_INIT;
 322
 323                strbuf_addf(&name, "textconv/%s", driver->name);
 324                notes_cache_init(r, c, name.buf, driver->textconv);
 325                driver->textconv_cache = c;
 326                strbuf_release(&name);
 327        }
 328
 329        return driver;
 330}