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Import cgit prototype from git tree

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This enables basic cgit functionality, using libgit.a and xdiff/lib.a from
git + a custom "git.h" + openssl for sha1 routines.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This commit is contained in:
Lars Hjemli 2006-12-09 15:18:17 +01:00
commit 0d169ada2b
7 changed files with 1090 additions and 0 deletions
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24
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INSTALL_BIN = /var/www/htdocs/cgit.cgi
INSTALL_CSS = /var/www/htdocs/cgit.css
EXTLIBS = ../git/libgit.a ../git/xdiff/lib.a -lz -lcrypto
OBJECTS = cgit.o config.o html.o
all: cgit
install: all
install cgit $(INSTALL_BIN)
install cgit.css $(INSTALL_CSS)
clean:
rm -f cgit *.o
cgit: $(OBJECTS)
$(CC) -o cgit $(OBJECTS) $(EXTLIBS)
cgit.o: cgit.h git.h config.o html.o
config.o: cgit.h git.h html.c
html.o: cgit.h git.h html.c

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#include "cgit.h"
static const char cgit_doctype[] =
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\"\n"
" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n";
static const char cgit_error[] =
"<div class='error'>%s</div>";
static const char cgit_lib_error[] =
"<div class='error'>%s: %s</div>";
char *cgit_root = "/var/git";
char *cgit_root_title = "Git repository browser";
char *cgit_css = "/cgit.css";
char *cgit_logo = "/git-logo.png";
char *cgit_logo_link = "http://www.kernel.org/pub/software/scm/git/docs/";
char *cgit_virtual_root = NULL;
char *cgit_repo_name = NULL;
char *cgit_repo_desc = NULL;
char *cgit_repo_owner = NULL;
char *cgit_query_repo = NULL;
char *cgit_query_page = NULL;
char *cgit_query_head = NULL;
int cgit_parse_query(char *txt, configfn fn)
{
char *t = txt, *value = NULL, c;
if (!txt)
return 0;
while((c=*t) != '\0') {
if (c=='=') {
*t = '\0';
value = t+1;
} else if (c=='&') {
*t = '\0';
(*fn)(txt, value);
txt = t+1;
value = NULL;
}
t++;
}
if (t!=txt)
(*fn)(txt, value);
return 0;
}
void cgit_global_config_cb(const char *name, const char *value)
{
if (!strcmp(name, "root"))
cgit_root = xstrdup(value);
else if (!strcmp(name, "root-title"))
cgit_root_title = xstrdup(value);
else if (!strcmp(name, "css"))
cgit_css = xstrdup(value);
else if (!strcmp(name, "logo"))
cgit_logo = xstrdup(value);
else if (!strcmp(name, "logo-link"))
cgit_logo_link = xstrdup(value);
else if (!strcmp(name, "virtual-root"))
cgit_virtual_root = xstrdup(value);
}
void cgit_repo_config_cb(const char *name, const char *value)
{
if (!strcmp(name, "name"))
cgit_repo_name = xstrdup(value);
else if (!strcmp(name, "desc"))
cgit_repo_desc = xstrdup(value);
else if (!strcmp(name, "owner"))
cgit_repo_owner = xstrdup(value);
}
void cgit_querystring_cb(const char *name, const char *value)
{
if (!strcmp(name,"r"))
cgit_query_repo = xstrdup(value);
else if (!strcmp(name, "p"))
cgit_query_page = xstrdup(value);
else if (!strcmp(name, "h"))
cgit_query_head = xstrdup(value);
}
char *cgit_repourl(const char *reponame)
{
if (cgit_virtual_root) {
return fmt("%s/%s/", cgit_virtual_root, reponame);
} else {
return fmt("?r=%s", reponame);
}
}
char *cgit_pageurl(const char *reponame, const char *pagename,
const char *query)
{
if (cgit_virtual_root) {
return fmt("%s/%s/%s/?%s", cgit_virtual_root, reponame,
pagename, query);
} else {
return fmt("?r=%s&p=%s&%s", reponame, pagename, query);
}
}
static int cgit_print_branch_cb(const char *refname, const unsigned char *sha1,
int flags, void *cb_data)
{
struct commit *commit;
char buf[256], *url;
commit = lookup_commit(sha1);
if (commit && !parse_commit(commit)){
html("<tr><td>");
url = cgit_pageurl(cgit_query_repo, "log",
fmt("h=%s", refname));
html_link_open(url, NULL, NULL);
strncpy(buf, refname, sizeof(buf));
html_txt(buf);
html_link_close();
html("</td><td>");
pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0, buf,
sizeof(buf), 0, NULL, NULL, 0);
html_txt(buf);
html("</td></tr>\n");
} else {
html("<tr><td>");
html_txt(buf);
html("</td><td>");
htmlf("*** bad ref %s", sha1_to_hex(sha1));
html("</td></tr>\n");
}
return 0;
}
static void cgit_print_docstart(char *title)
{
html("Content-Type: text/html; charset=utf-8\n");
html("\n");
html(cgit_doctype);
html("<html>\n");
html("<head>\n");
html("<title>");
html_txt(title);
html("</title>\n");
html("<link rel='stylesheet' type='text/css' href='");
html_attr(cgit_css);
html("'/>\n");
html("</head>\n");
html("<body>\n");
}
static void cgit_print_docend()
{
html("</body>\n</html>\n");
}
static void cgit_print_pageheader(char *title)
{
html("<div id='header'>");
htmlf("<a href='%s'>", cgit_logo_link);
htmlf("<img id='logo' src='%s'/>\n", cgit_logo);
htmlf("</a>");
html_txt(title);
html("</div>");
}
static void cgit_print_repolist()
{
DIR *d;
struct dirent *de;
struct stat st;
char *name;
cgit_print_docstart(cgit_root_title);
cgit_print_pageheader(cgit_root_title);
if (!(d = opendir("."))) {
htmlf(cgit_lib_error, "Unable to scan repository directory",
strerror(errno));
cgit_print_docend();
return;
}
html("<h2>Repositories</h2>\n");
html("<table class='list'>");
html("<tr><th>Name</th><th>Description</th><th>Owner</th></tr>\n");
while ((de = readdir(d)) != NULL) {
if (de->d_name[0] == '.')
continue;
if (stat(de->d_name, &st) < 0)
continue;
if (!S_ISDIR(st.st_mode))
continue;
cgit_repo_name = cgit_repo_desc = cgit_repo_owner = NULL;
name = fmt("%s/.git/info/cgit", de->d_name);
if (cgit_read_config(name, cgit_repo_config_cb))
continue;
html("<tr><td>");
html_link_open(cgit_repourl(de->d_name), NULL, NULL);
html_txt(cgit_repo_name);
html_link_close();
html("</td><td>");
html_txt(cgit_repo_desc);
html("</td><td>");
html_txt(cgit_repo_owner);
html("</td></tr>\n");
}
closedir(d);
html("</table>");
cgit_print_docend();
}
static void cgit_print_branches()
{
html("<table class='list'>");
html("<tr><th>Branch name</th><th>Head commit</th></tr>\n");
for_each_branch_ref(cgit_print_branch_cb, NULL);
html("</table>");
}
static int get_one_line(char *txt)
{
char *t;
for(t=txt; *t != '\n' && t != '\0'; t++)
;
*t = '\0';
return t-txt-1;
}
static void cgit_print_commit_shortlog(struct commit *commit)
{
char *h, *t, *p;
char *tree = NULL, *author = NULL, *subject = NULL;
int len;
time_t sec;
struct tm *time;
char buf[32];
h = t = commit->buffer;
if (strncmp(h, "tree ", 5))
die("Bad commit format: %s",
sha1_to_hex(commit->object.sha1));
len = get_one_line(h);
tree = h+5;
h += len + 2;
while (!strncmp(h, "parent ", 7))
h += get_one_line(h) + 2;
if (!strncmp(h, "author ", 7)) {
author = h+7;
h += get_one_line(h) + 2;
t = author;
while(t!=h && *t!='<')
t++;
*t='\0';
p = t;
while(--t!=author && *t==' ')
*t='\0';
while(++p!=h && *p!='>')
;
while(++p!=h && !isdigit(*p))
;
t = p;
while(++p && isdigit(*p))
;
*p = '\0';
sec = atoi(t);
time = gmtime(&sec);
}
while((len = get_one_line(h)) > 0)
h += len+2;
h++;
len = get_one_line(h);
subject = h;
html("<tr><td>");
strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", time);
html_txt(buf);
html("</td><td>");
char *qry = fmt("h=%s", sha1_to_hex(commit->object.sha1));
char *url = cgit_pageurl(cgit_query_repo, "view", qry);
html_link_open(url, NULL, NULL);
html_txt(subject);
html_link_close();
html("</td><td>");
html_txt(author);
html("</td></tr>\n");
}
static void cgit_print_log(const char *tip, int ofs, int cnt)
{
struct rev_info rev;
struct commit *commit;
const char *argv[2] = {NULL, tip};
int n = 0;
init_revisions(&rev, NULL);
rev.abbrev = DEFAULT_ABBREV;
rev.commit_format = CMIT_FMT_DEFAULT;
rev.verbose_header = 1;
rev.show_root_diff = 0;
setup_revisions(2, argv, &rev, NULL);
prepare_revision_walk(&rev);
html("<h2>Log</h2>");
html("<table class='list'>");
html("<tr><th>Date</th><th>Message</th><th>Author</th></tr>\n");
while ((commit = get_revision(&rev)) != NULL && n++ < 100) {
cgit_print_commit_shortlog(commit);
free(commit->buffer);
commit->buffer = NULL;
free_commit_list(commit->parents);
commit->parents = NULL;
}
html("</table>\n");
}
static void cgit_print_repo_summary()
{
html("<h2>");
html_txt("Repo summary page");
html("</h2>");
cgit_print_branches();
}
static void cgit_print_object(char *hex)
{
unsigned char sha1[20];
//struct object *object;
char type[20];
unsigned char *buf;
unsigned long size;
if (get_sha1_hex(hex, sha1)){
htmlf(cgit_error, "Bad hex value");
return;
}
if (sha1_object_info(sha1, type, NULL)){
htmlf(cgit_error, "Bad object name");
return;
}
buf = read_sha1_file(sha1, type, &size);
if (!buf) {
htmlf(cgit_error, "Error reading object");
return;
}
buf[size] = '\0';
html("<h2>Object view</h2>");
htmlf("sha1=%s<br/>type=%s<br/>size=%i<br/>", hex, type, size);
html("<pre>");
html_txt(buf);
html("</pre>");
}
static void cgit_print_repo_page()
{
if (chdir(cgit_query_repo) ||
cgit_read_config(".git/info/cgit", cgit_repo_config_cb)) {
char *title = fmt("%s - %s", cgit_root_title, "Bad request");
cgit_print_docstart(title);
cgit_print_pageheader(title);
htmlf(cgit_lib_error, "Unable to scan repository",
strerror(errno));
cgit_print_docend();
return;
}
char *title = fmt("%s - %s", cgit_repo_name, cgit_repo_desc);
cgit_print_docstart(title);
cgit_print_pageheader(title);
if (!cgit_query_page)
cgit_print_repo_summary();
else if (!strcmp(cgit_query_page, "log")) {
cgit_print_log(cgit_query_head, 0, 100);
} else if (!strcmp(cgit_query_page, "view")) {
cgit_print_object(cgit_query_head);
}
cgit_print_docend();
}
int main(int argc, const char **argv)
{
if (cgit_read_config("/etc/cgitrc", cgit_global_config_cb))
die("Error reading config: %d %s", errno, strerror(errno));
chdir(cgit_root);
cgit_parse_query(getenv("QUERY_STRING"), cgit_querystring_cb);
if (cgit_query_repo)
cgit_print_repo_page();
else
cgit_print_repolist();
return 0;
}

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body {
font-family: arial;
font-size: normal;
background: white;
padding: 0em;
margin: 0.5em;
}
h2 {
font-size: normal;
font-weight: bold;
margin-bottom: 0.1em;
}
table.list {
border: solid 1px black;
border-collapse: collapse;
border: solid 1px #aaa;
}
table.list th {
text-align: left;
font-weight: bold;
background: #ddd;
border-bottom: solid 1px #aaa;
padding: 0.1em 0.5em 0.1em;
vertical-align: baseline;
}
table.list td {
border: none;
padding: 0.1em 0.5em;
background: white;
}
img {
border: none;
}
div#header {
background-color: #ddd;
padding: 0.25em 0.25em 0.25em 0.5em;
font-size: 150%;
font-weight: bold;
border: solid 1px #aaa;
vertical-align: middle;
}
div#header img#logo {
float: right;
}
div#content {
margin: 0.5em 0.5em;
}
div.error {
color: red;
font-weight: bold;
margin: 1em 2em;
}

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#ifndef CGIT_H
#define CGIT_H
#include "git.h"
#include <openssl/sha.h>
extern char *fmt(const char *format,...);
extern void html(const char *txt);
extern void htmlf(const char *format,...);
extern void html_txt(char *txt);
extern void html_attr(char *txt);
extern void html_link_open(char *url, char *title, char *class);
extern void html_link_close(void);
typedef void (*configfn)(const char *name, const char *value);
extern int cgit_read_config(const char *filename, configfn fn);
#endif /* CGIT_H */

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#include "cgit.h"
int next_char(FILE *f)
{
int c = fgetc(f);
if (c=='\r') {
c = fgetc(f);
if (c!='\n') {
ungetc(c, f);
c = '\r';
}
}
return c;
}
void skip_line(FILE *f)
{
int c;
while((c=next_char(f)) && c!='\n' && c!=EOF)
;
}
int read_config_line(FILE *f, char *line, const char **value, int bufsize)
{
int i = 0, isname = 0;
*value = NULL;
while(i<bufsize-1) {
int c = next_char(f);
if (!isname && (c=='#' || c==';')) {
skip_line(f);
continue;
}
if (!isname && isblank(c))
continue;
if (c=='=' && !*value) {
line[i] = 0;
*value = &line[i+1];
} else if (c=='\n' && !isname) {
i = 0;
continue;
} else if (c=='\n' || c==EOF) {
line[i] = 0;
break;
} else {
line[i]=c;
}
isname = 1;
i++;
}
line[i+1] = 0;
return i;
}
int cgit_read_config(const char *filename, configfn fn)
{
int ret = 0, len;
char line[256];
const char *value;
FILE *f = fopen(filename, "r");
if (!f)
return -1;
while(len = read_config_line(f, line, &value, sizeof(line)))
(*fn)(line, value);
fclose(f);
return ret;
}

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#ifndef GIT_H
#define GIT_H
/*
* from git:git-compat-util.h
*/
#ifndef FLEX_ARRAY
#if defined(__GNUC__) && (__GNUC__ < 3)
#define FLEX_ARRAY 0
#else
#define FLEX_ARRAY /* empty */
#endif
#endif
#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <dirent.h>
#include <time.h>
static inline char* xstrdup(const char *str)
{
char *ret = strdup(str);
if (!ret)
die("Out of memory, strdup failed");
return ret;
}
static inline void *xmalloc(size_t size)
{
void *ret = malloc(size);
if (!ret && !size)
ret = malloc(1);
if (!ret)
die("Out of memory, malloc failed");
#ifdef XMALLOC_POISON
memset(ret, 0xA5, size);
#endif
return ret;
}
static inline void *xrealloc(void *ptr, size_t size)
{
void *ret = realloc(ptr, size);
if (!ret && !size)
ret = realloc(ptr, 1);
if (!ret)
die("Out of memory, realloc failed");
return ret;
}
static inline void *xcalloc(size_t nmemb, size_t size)
{
void *ret = calloc(nmemb, size);
if (!ret && (!nmemb || !size))
ret = calloc(1, 1);
if (!ret)
die("Out of memory, calloc failed");
return ret;
}
static inline ssize_t xread(int fd, void *buf, size_t len)
{
ssize_t nr;
while (1) {
nr = read(fd, buf, len);
if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
continue;
return nr;
}
}
static inline ssize_t xwrite(int fd, const void *buf, size_t len)
{
ssize_t nr;
while (1) {
nr = write(fd, buf, len);
if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
continue;
return nr;
}
}
/*
* from git:cache.h
*/
/* Convert to/from hex/sha1 representation */
#define MINIMUM_ABBREV 4
#define DEFAULT_ABBREV 7
extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
/*
* from git:object.h
*/
struct object_list {
struct object *item;
struct object_list *next;
};
struct object_refs {
unsigned count;
struct object *base;
struct object *ref[FLEX_ARRAY]; /* more */
};
struct object_array {
unsigned int nr;
unsigned int alloc;
struct object_array_entry {
struct object *item;
const char *name;
} *objects;
};
#define TYPE_BITS 3
#define FLAG_BITS 27
/*
* The object type is stored in 3 bits.
*/
struct object {
unsigned parsed : 1;
unsigned used : 1;
unsigned type : TYPE_BITS;
unsigned flags : FLAG_BITS;
unsigned char sha1[20];
};
/*
* from git:tree.h
*/
struct tree {
struct object object;
void *buffer;
unsigned long size;
};
/* from git:commit.h */
struct commit_list {
struct commit *item;
struct commit_list *next;
};
struct commit {
struct object object;
void *util;
unsigned long date;
struct commit_list *parents;
struct tree *tree;
char *buffer;
};
/* Commit formats */
enum cmit_fmt {
CMIT_FMT_RAW,
CMIT_FMT_MEDIUM,
CMIT_FMT_DEFAULT = CMIT_FMT_MEDIUM,
CMIT_FMT_SHORT,
CMIT_FMT_FULL,
CMIT_FMT_FULLER,
CMIT_FMT_ONELINE,
CMIT_FMT_EMAIL,
CMIT_FMT_UNSPECIFIED,
};
struct commit *lookup_commit(const unsigned char *sha1);
struct commit *lookup_commit_reference(const unsigned char *sha1);
struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
int quiet);
typedef void (*topo_sort_set_fn_t)(struct commit*, void *data);
typedef void* (*topo_sort_get_fn_t)(struct commit*);
/*
* from git:diff.h
*/
struct rev_info;
struct diff_options;
struct diff_queue_struct;
typedef void (*change_fn_t)(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
const char *base, const char *path);
typedef void (*add_remove_fn_t)(struct diff_options *options,
int addremove, unsigned mode,
const unsigned char *sha1,
const char *base, const char *path);
typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
struct diff_options *options, void *data);
#define DIFF_FORMAT_RAW 0x0001
#define DIFF_FORMAT_DIFFSTAT 0x0002
#define DIFF_FORMAT_NUMSTAT 0x0004
#define DIFF_FORMAT_SUMMARY 0x0008
#define DIFF_FORMAT_PATCH 0x0010
/* These override all above */
#define DIFF_FORMAT_NAME 0x0100
#define DIFF_FORMAT_NAME_STATUS 0x0200
#define DIFF_FORMAT_CHECKDIFF 0x0400
/* Same as output_format = 0 but we know that -s flag was given
* and we should not give default value to output_format.
*/
#define DIFF_FORMAT_NO_OUTPUT 0x0800
#define DIFF_FORMAT_CALLBACK 0x1000
struct diff_options {
const char *filter;
const char *orderfile;
const char *pickaxe;
const char *single_follow;
unsigned recursive:1,
tree_in_recursive:1,
binary:1,
text:1,
full_index:1,
silent_on_remove:1,
find_copies_harder:1,
color_diff:1,
color_diff_words:1;
int context;
int break_opt;
int detect_rename;
int line_termination;
int output_format;
int pickaxe_opts;
int rename_score;
int reverse_diff;
int rename_limit;
int setup;
int abbrev;
const char *msg_sep;
const char *stat_sep;
long xdl_opts;
int stat_width;
int stat_name_width;
int nr_paths;
const char **paths;
int *pathlens;
change_fn_t change;
add_remove_fn_t add_remove;
diff_format_fn_t format_callback;
void *format_callback_data;
};
enum color_diff {
DIFF_RESET = 0,
DIFF_PLAIN = 1,
DIFF_METAINFO = 2,
DIFF_FRAGINFO = 3,
DIFF_FILE_OLD = 4,
DIFF_FILE_NEW = 5,
DIFF_COMMIT = 6,
DIFF_WHITESPACE = 7,
};
/*
* from git:revision.h
*/
struct rev_info;
struct log_info;
typedef void (prune_fn_t)(struct rev_info *revs, struct commit *commit);
struct rev_info {
/* Starting list */
struct commit_list *commits;
struct object_array pending;
/* Basic information */
const char *prefix;
void *prune_data;
prune_fn_t *prune_fn;
/* Traversal flags */
unsigned int dense:1,
no_merges:1,
no_walk:1,
remove_empty_trees:1,
simplify_history:1,
lifo:1,
topo_order:1,
tag_objects:1,
tree_objects:1,
blob_objects:1,
edge_hint:1,
limited:1,
unpacked:1, /* see also ignore_packed below */
boundary:1,
parents:1;
/* Diff flags */
unsigned int diff:1,
full_diff:1,
show_root_diff:1,
no_commit_id:1,
verbose_header:1,
ignore_merges:1,
combine_merges:1,
dense_combined_merges:1,
always_show_header:1;
/* Format info */
unsigned int shown_one:1,
abbrev_commit:1,
relative_date:1;
const char **ignore_packed; /* pretend objects in these are unpacked */
int num_ignore_packed;
unsigned int abbrev;
enum cmit_fmt commit_format;
struct log_info *loginfo;
int nr, total;
const char *mime_boundary;
const char *message_id;
const char *ref_message_id;
const char *add_signoff;
const char *extra_headers;
/* Filter by commit log message */
struct grep_opt *grep_filter;
/* special limits */
int max_count;
unsigned long max_age;
unsigned long min_age;
/* diff info for patches and for paths limiting */
struct diff_options diffopt;
struct diff_options pruning;
topo_sort_set_fn_t topo_setter;
topo_sort_get_fn_t topo_getter;
};
extern struct commit *get_revision(struct rev_info *revs);
#endif /* GIT_H */

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#include "cgit.h"
char *fmt(const char *format, ...)
{
static char buf[8][1024];
static int bufidx;
int len;
va_list args;
bufidx++;
bufidx &= 7;
va_start(args, format);
len = vsnprintf(buf[bufidx], sizeof(buf[bufidx]), format, args);
va_end(args);
if (len>sizeof(buf[bufidx]))
die("[html.c] string truncated: %s", format);
return buf[bufidx];
}
void html(const char *txt)
{
fputs(txt, stdout);
}
void htmlf(const char *format, ...)
{
va_list args;
va_start(args, format);
vprintf(format, args);
va_end(args);
}
void html_txt(char *txt)
{
char *t = txt;
while(*t){
int c = *t;
if (c=='<' || c=='>' || c=='&') {
*t = '\0';
html(txt);
*t = c;
if (c=='>')
html("&gt;");
else if (c=='<')
html("&lt;");
else if (c=='&')
html("&amp;");
txt = t+1;
}
t++;
}
if (t!=txt)
html(txt);
}
void html_attr(char *txt)
{
char *t = txt;
while(*t){
int c = *t;
if (c=='<' || c=='>' || c=='\'') {
*t = '\0';
html(txt);
*t = c;
if (c=='>')
html("&gt;");
else if (c=='<')
html("&lt;");
else if (c=='\'')
html("&quote;");
txt = t+1;
}
t++;
}
if (t!=txt)
html(txt);
}
void html_link_open(char *url, char *title, char *class)
{
html("<a href='");
html_attr(url);
if (title) {
html("' title='");
html_attr(title);
}
if (class) {
html("' class='");
html_attr(class);
}
html("'>");
}
void html_link_close(void)
{
html("</a>");
}