Import cgit prototype from git tree

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>
author: Lars Hjemli <hjemli@gmail.com> 2006-12-09 15:18:17 +0100
committer: Lars Hjemli <hjemli@gmail.com> 2006-12-09 15:18:17 +0100
commit: 0d169ada2ba81210ab1191a5f2212662e90db77e (patch)
tree: 402b54583db269323ebb28e5fbf2075c4c1b3d85
7 files changed, 1090 insertions, 0 deletions
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..1470c0a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,24 @@
+
+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
diff --git a/cgit.c b/cgit.c
new file mode 100644
index 0000000..4c14f77
--- /dev/null
+++ b/cgit.c
@@ -0,0 +1,410 @@
+#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;
+}
diff --git a/cgit.css b/cgit.css
new file mode 100644
index 0000000..3ed0c22
--- /dev/null
+++ b/cgit.css
@@ -0,0 +1,63 @@
+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;
+}
\ No newline at end of file
diff --git a/cgit.h b/cgit.h
new file mode 100644
index 0000000..19f7ba7
--- /dev/null
+++ b/cgit.h
@@ -0,0 +1,21 @@
+#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 */
diff --git a/config.c b/config.c
new file mode 100644
index 0000000..858ab69
--- /dev/null
+++ b/config.c
@@ -0,0 +1,73 @@
+#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;
+}
+
diff --git a/git.h b/git.h
new file mode 100644
index 0000000..443f216
--- /dev/null
+++ b/git.h
@@ -0,0 +1,399 @@
+#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 */
diff --git a/html.c b/html.c
new file mode 100644
index 0000000..5780dc1
--- /dev/null
+++ b/html.c
@@ -0,0 +1,100 @@
+#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>");
+}
author	Lars Hjemli <hjemli@gmail.com>	2006-12-09 15:18:17 +0100
committer	Lars Hjemli <hjemli@gmail.com>	2006-12-09 15:18:17 +0100
commit	0d169ada2ba81210ab1191a5f2212662e90db77e (patch)
tree	402b54583db269323ebb28e5fbf2075c4c1b3d85