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#ifndef VOLGIT_SYSTEM_PART_C
#define VOLGIT_SYSTEM_PART_C VOLGIT_SYSTEM_PART_C
#include <system_part.h>
const char *const default_header="<!DOCTYPE html><html><head><title>GIT</title></head><body>";
const char *const default_footer="</body></html>";
struct Volgit_Options options
=
{
.input_path=NULL,
.output_path=NULL,
.header=default_header,
.footer=default_footer,
.output_dir_fd=-1,
.tree_cutoff=NO_TREE_CUTOFF,
.output_is_tree_like=0,
};
const char *usage=
"Options: \n"
" --input <repository path>\n"
" --output <name of directory where output is going to be stored>\n"
" --header <file containing content which is prepended to all generated files>\n"
" --footer <file containing content which is appended to all generated files>\n"
" --tree \n"
" Use 'tree' like output for directory index\n"
" --tree-cutoff <number>\n"
" The tree output can get too bulky\n"
" so you can set a depth at which the output\n"
" is seperated into a different file\n"
" -h --help\n"
" Print this message\n";
static inline int get_next_option_or_die(int i,int argc,const char *error_message)
{
if(i+1>=argc)
die(error_message);
return i+1;
}
void parse_options(int argc,char **argv)
{
#define if_option(option) if(!strncmp(argv[i],option,sizeof(option)))
int i;
if(argc==1)
die(usage);
for(i=1;i<argc;++i)
{
if_option("--output")
{
i=get_next_option_or_die(i,argc,"expected a file name after --output flag\n");
options.output_path=argv[i];
options.output_dir_fd=open(options.output_path,O_RDONLY|O_DIRECTORY);
if(options.output_dir_fd==-1)
{
mkdir(options.output_path,0775);
options.output_dir_fd=open(options.output_path,O_RDONLY|O_DIRECTORY);
if(options.output_dir_fd==-1)
die("Could not open output dir\n");
}
}else if_option("--input")
{
i=get_next_option_or_die(i,argc,"expected a file name after --input flag\n");
options.input_path=argv[i];
}else if_option("--header")
{
i=get_next_option_or_die(i,argc,"expected an argument after --header flag\n");
options.header=read_file(argv[i]);
}else if_option("--footer")
{
i=get_next_option_or_die(i,argc,"expected an argument after --footer flag\n");
options.footer=read_file(argv[i]);
}else if_option("--tree")
{
options.output_is_tree_like=1;
}else if_option("--tree-cutoff")
{
i=get_next_option_or_die(i,argc,"expected an argument after --tree-cutoff flag\n");
if(sscanf(argv[i],"%d",&options.tree_cutoff))
die("expected a number after the --tree-cutoff flag\n");
}else if_option("-h")
{
die(usage);
}else if_option("--help")
{
die(usage);
}else
{
die("Invalid command argument '%s'. Try using -h\n",argv[i]);
}
}
if(options.input_path==NULL)
die("You need to specify an input path\n");
if(options.output_path==NULL)
die("You need to specify an output path\n");
#undef if_option
}
char* read_file(const char *filename)
{
long file_size;
int file;
char *ret;
struct stat file_stats;
file=open(filename,O_RDONLY);
if(file==-1)
die("Could not open file %s\n",filename);
fstat(file,&file_stats);
ret=malloc(file_stats.st_size+1);
if(ret==NULL)
die("Ran out of memory!\n");
read(file,ret,file_stats.st_size);
ret[file_stats.st_size]='\0';
close(file);
return ret;
}
int create_branch_dir(const char *branch_name)
{
int ret=0;
ret=openat(options.output_dir_fd,branch_name,O_DIRECTORY|O_RDONLY);
if(ret==-1)
{
if(mkdirat(options.output_dir_fd,branch_name,0775)==-1)
die("Could not create branch directory for %s\n",branch_name);
ret=openat(options.output_dir_fd,branch_name,O_DIRECTORY|O_RDONLY);
if(ret==-1)
die("Could not open newly created directory for branch %s\n",branch_name);
}
return ret;
}
FILE* create_file(int branch_dir,const char *filename)
{
int fd;
char *new_filename;
size_t old_filename_len;
FILE *ret;
old_filename_len=strlen(filename);
new_filename=calloc(old_filename_len+sizeof(".html"),1);
if(new_filename==NULL)
die("Ran out of memory!\n");
memcpy(new_filename,filename,old_filename_len);
memcpy(new_filename+old_filename_len,".html",sizeof(".html"));
unlinkat(branch_dir,new_filename,0);
fd=openat(branch_dir,new_filename,O_CREAT|O_RDWR,0664);
if(fd==-1)
die("Could not open the file '%s' for one of the branches\n",filename);
free(new_filename);
ret=fdopen(fd,"w");
fprintf(ret,"%s",options.header);
return ret;
}
void close_file(FILE *file)
{
fprintf(file,"%s",options.footer);
fclose(file);
}
int create_dir(int base_dir,const char *dir_name)
{
int ret;
ret=openat(base_dir,dir_name,O_DIRECTORY|O_RDONLY);
if(ret!=-1)
return ret;
mkdirat(base_dir,dir_name,0775);
ret=openat(base_dir,dir_name,O_DIRECTORY|O_RDONLY);
if(ret==-1)
die("Could not create the 'files' subdirectory of one of the branch dirs\n");
return ret;
}
void die(const char *format, ...)
{
va_list args;
va_start(args,format);
vfprintf(stderr,format,args);
exit(1);
}
void push_html_link_for_blob(FILE *out,const char *filename,const char *oid)
{
fprintf(out,"<a href=\"%s.html\" class=\"blob_entry\">%s</a>\n",oid,filename);
}
void push_html_link_for_tree(FILE *out,const char *filename,const char *oid)
{
fprintf(out,"<b><a href=\"%s/index.html\" class=\"tree_entry\">%s</a></b>\n",oid,filename);
}
#endif
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