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#! /usr/bin/env pike 
 
multiset except_modules = (<>); 
string vpath; 
 
string main_branch; 
 
// NB: This script is run with an installed Pike binary, which 
//     is likely to be older than the one we are exporting... 
#if constant(String.trim) 
constant trim = String.trim; 
#else 
constant trim = String.trim_all_whites; 
#endif 
 
string dirname(string dir) 
{ 
  array tmp=dir/"/"; 
  if(tmp[-1]=="") tmp=tmp[..sizeof(tmp)-2]; 
  tmp=tmp[..sizeof(tmp)-2]; 
  if(sizeof(tmp)<2) return "/"; 
  return tmp*"/"; 
} 
 
array(string) get_files(string path) 
{ 
  array(string) files = get_dir(path); 
  files -= ({ ".git", ".gitignore", ".gitattributes", }); 
 
  array(string) ret = ({}); 
  foreach(files, string fn) 
  { 
    if( fn=="core" ) continue; 
    if( fn[-1]=='~' ) continue; 
    if( sizeof(fn)>2 && fn[0]=='#' && fn[-1]=='#' ) continue; 
    if( sizeof(fn)>2 && fn[0]=='.' && fn[1]=='#' ) continue; 
 
    if( path==vpath+"/src/modules" && except_modules[fn] ) 
      continue; 
 
    if( path==vpath+"/bin" && except_modules[fn] ) 
      continue; 
 
    if( has_prefix(path, vpath+"/lib/modules") && 
        (except_modules[fn] || except_modules[fn - ".pmod"])) 
      continue; 
 
    fn = path+"/"+fn; 
 
    if( Stdio.is_dir(fn) ) 
      ret += get_files(fn); 
    else 
      ret += ({ fn }); 
  } 
  return ret; 
} 
 
void run( string cmd, mixed ... args ) 
{ 
  function fail; 
  if( functionp(args[-1]) ) 
  { 
    fail = args[-1]; 
    args = args[..<1]; 
  } 
  mapping mods; 
  if( mappingp(args[-1]) ) 
  { 
    mods = args[-1]; 
    args = args[..<1]; 
  } 
 
  mapping r = Process.run( ({ cmd }) + args, mods ); 
  if( r->exitcode && fail ) 
  { 
    fail(r); 
  } 
} 
 
void fix_configure(string dir, Stdio.Stat aclocal) 
{ 
  Stdio.Stat config=file_stat(dir+"/configure"); 
  Stdio.Stat config_in=file_stat(dir+"/configure.in"); 
 
  if(config_in) 
  { 
    if(!config || config_in->mtime > config->mtime || 
       (aclocal && aclocal->mtime > config->mtime)) 
    { 
      werror("Fixing configure in "+dir+".\n"); 
      run( pike_base_name+"/src/run_autoconfig", "--no-recursion", dir ); 
    } 
  } 
} 
 
array(int) getversion() 
{ 
  string s = Stdio.read_file(pike_base_name+"/src/version.h"); 
 
  if(!s) 
  { 
    werror("Failed to read version.h\n"); 
    werror("cwd=%s  version.h=%s\n", getcwd(), pike_base_name+"/src/version.h"); 
    exit(1); 
  } 
 
  int maj, min, build; 
 
  if ((!sscanf(s, "%*sPIKE_MAJOR_VERSION %d", maj)) || 
      (!sscanf(s, "%*sPIKE_MINOR_VERSION %d", min)) || 
      (!sscanf(s, "%*sPIKE_BUILD_VERSION %d", build))) { 
 
    werror("Failed to get Pike version.\n"); 
    exit(1); 
  } 
 
  return ({ maj, min, build }); 
} 
 
string low_bump_version(int|void bump_minor) 
{ 
  string s = Stdio.read_file(pike_base_name+"/src/version.h"); 
  if (bump_minor) { 
    sscanf(s, "%s PIKE_MINOR_VERSION %d%s", string pre, int minor, string post); 
    minor++; 
    s = pre + " PIKE_MINOR_VERSION " + minor + post; 
  } 
  sscanf(s, "%s PIKE_BUILD_VERSION %d%s", string pre, int rel, string post); 
  if (bump_minor) { 
    rel = 0; 
  } else { 
    rel++; 
  } 
  s = pre + " PIKE_BUILD_VERSION " + rel + post; 
  Stdio.write_file( pike_base_name+"/src/version.h", s); 
  return ((array(string))getversion())*"."; 
} 
 
string git_cmd(string ... args) 
{ 
  mapping r = Process.run( ({ "git" }) + args ); 
  if( r->exitcode ) 
    exit(r->exitcode, "Git command \"git %s\" failed.\n%s", args*" ", r->stderr||""); 
  return trim(r->stdout||""); 
} 
 
void git_bump_version() 
{ 
  werror("Bumping release number.\n"); 
 
  int bump_minor = 0; 
 
  string branch = git_cmd("symbolic-ref", "HEAD"); 
 
  if (has_prefix(branch, "refs/heads/")) { 
    branch = branch[sizeof("refs/heads/")..]; 
    string upstream_branch = 
      git_cmd("config", "--get", "branch."+branch+".merge"); 
    if (has_prefix(upstream_branch, "refs/heads/")) { 
      upstream_branch = upstream_branch[sizeof("refs/heads/")..]; 
 
      // Bump the minor if the upstream branch is a single number. 
      bump_minor = (sizeof(upstream_branch/".") < 2) && (int)upstream_branch; 
    } 
  } 
 
  string rel = low_bump_version(bump_minor); 
 
  string attrs = Stdio.read_file(pike_base_name+"/.gitattributes"); 
 
  if (attrs) { 
    string new_attrs = (attrs/"\n/src/version.h foreign_ident\n")*"\n"; 
    if (new_attrs != attrs) { 
      werror("Adjusting attributes.\n"); 
      Stdio.write_file(pike_base_name+"/.gitattributes", new_attrs); 
    } 
    git_cmd("add", ".gitattributes"); 
  } 
 
  git_cmd("add", "src/version.h"); 
 
  git_cmd("commit", "-m", "release number bumped to "+rel+" by export.pike"); 
} 
 
array(string) build_file_list(string list_file) 
{ 
  if(!file_stat(list_file)) { 
    werror("Could not find %s\n", list_file); 
    exit(1); 
  } 
 
  array(string) ret=({ }), missing=({ }); 
  foreach(Stdio.read_file(list_file) / "\n", string line) 
    { 
      if( !sizeof(line) || line[0]=='#' ) 
        continue; 
      string name=vpath+line; 
      Stdio.Stat fs; 
      if((fs = file_stat(name)) && fs->isdir) 
        ret += get_files(name); 
      else if(fs && fs->isreg) 
        ret += ({ name }); 
      else 
        missing +=({ name }); 
    } 
 
  if(!ignore_missing && sizeof(missing)){ 
    werror("The following files and/or directories were not found:\n\t" 
           + missing * "\t\n" 
           + "\n(you might want to add --force)\n"); 
    return 0; 
  } 
  return ret; 
} 
 
constant stamp=#"Pike export stamp 
time:%t 
type:%type 
branch:%branch 
major:%maj 
minor:%min 
build:%bld 
revision:%rev 
source:%src 
year:%Y 
month:%M 
day:%D 
hour:%h 
minute:%m 
second:%s 
"; 
 
string pike_base_name; 
string srcdir; 
int(0..1) ignore_missing; 
 
void clean_exit(int err, mixed ... msg) 
{ 
  rm("buildid.txt"); 
 
  if( vpath ) 
    Stdio.recursive_rm(vpath); 
 
  /* Roll forward to a useable state. */ 
  if(main_branch) 
    git_cmd("checkout", main_branch); 
 
  exit(err, @msg); 
} 
 
int main(int argc, array(string) argv) 
{ 
  array(string) files; 
  string export_list, filename; 
  int tag, snapshot, t; 
 
  foreach(Getopt.find_all_options(argv, ({ 
    ({ "srcdir",    Getopt.HAS_ARG, "--srcdir"     }), 
    ({ "tag",       Getopt.NO_ARG,  "--tag"        }), 
    ({ "help",      Getopt.NO_ARG,  "--help"       }), 
    ({ "exportlist",Getopt.HAS_ARG, "--exportlist" }), 
    ({ "filename",  Getopt.HAS_ARG, "--name"       }), 
    ({ "force",     Getopt.NO_ARG,  "--force"      }), 
    ({ "timestamp", Getopt.HAS_ARG, "--timestamp"  }), 
    ({ "snapshot",  Getopt.NO_ARG,  "--snapshot"   }), 
  }) ),array opt) 
    { 
      switch(opt[0]) 
      { 
        case "srcdir": 
          srcdir=opt[1]; 
          if(basename(srcdir)=="src") 
            srcdir=dirname(srcdir); 
          pike_base_name="."; 
         
          cd(srcdir); 
          break; 
         
        case "exportlist": 
          export_list=opt[1]; 
          break; 
         
        case "filename": 
          filename=opt[1]; 
          break; 
 
        case "force": 
          ignore_missing=1; 
          break; 
 
        case "tag": 
          tag=1; 
          break; 
         
        case "help": 
          exit(0, documentation); 
 
        case "timestamp": 
          t=(int)opt[1]; 
          break; 
 
        case "snapshot": 
          snapshot=1; 
          break; 
      } 
    } 
 
  argv -= ({ 0 }); 
  except_modules = (multiset)argv[1..]; 
  if(!srcdir || !export_list || !filename) 
    exit(1, documentation); 
 
  main_branch = git_cmd("symbolic-ref", "-q", "HEAD"); 
  if (!has_prefix(main_branch, "refs/heads/")) 
    exit(1, "Unexpected HEAD: %O\n", main_branch); 
 
  main_branch = main_branch[sizeof("refs/heads/")..]; 
 
  if (tag) { 
    string remote = git_cmd("remote"); 
    if (!sizeof(remote)) remote = 0; 
    if (remote) git_cmd("pull", "--rebase", remote); 
 
    /* Tagging in git is fast, so there's no need to 
     * do it asynchronously. We also want to perform 
     * the version bumps back-to-back, to avoid 
     * ambiguities regarding the stable version. 
     * 
     * Note that the tagging is performed in a 
     * second push in case the paranoia rebase 
     * below actually has any effect. 
     */ 
 
    git_bump_version(); 
    array(int) version = getversion(); 
    vpath = sprintf("Pike-v%d.%d.%d", @version); 
    string tag = sprintf("v%d.%d.%d", @version); 
 
    git_bump_version(); 
 
    if (remote) { 
      /* Push the result. */ 
      git_cmd("pull", "--rebase", remote);      /* Paranoia... */ 
      git_cmd("push", remote); 
    } 
 
    /* Now it's time for the tags. */ 
    git_cmd("tag", tag, "HEAD^"); 
    if (remote) { 
      git_cmd("push", remote, "refs/tags/" + tag + ":refs/tags/" + tag); 
    } 
 
    /* Bumping is done, now go back to the stable version, 
     * so that we can create the dist files. */ 
    git_cmd("checkout", tag); 
  } 
 
  string revision = git_cmd("rev-list", "-1", "HEAD"); 
  string source = ((git_cmd("ls-tree", "HEAD", "src")/"\t")[0]/" ")[-1]; 
 
  t = t||time(); 
  mapping m = gmtime(t); 
  array(int) version = getversion(); 
  mapping symbols=([ 
    "%branch": main_branch, 
    "%maj":(string) version[0], 
    "%min":(string) version[1], 
    "%bld":(string) version[2], 
    "%rev":revision, 
    "%src":source, 
    "%type":snapshot?"snapshot":"release", 
    "%Y":sprintf("%04d",1900+m->year), 
    "%M":sprintf("%02d",1+m->mon), 
    "%D":sprintf("%02d",m->mday), 
    "%h":sprintf("%02d",m->hour), 
    "%m":sprintf("%02d",m->min), 
    "%s":sprintf("%02d",m->sec), 
    "%t":(string)t, 
  ]); 
 
  vpath = filename = replace(filename,symbols); 
 
  if (snapshot) 
    vpath = sprintf("Pike-v%d.%d-snapshot", @version); 
 
  Stdio.Stat aclocal=file_stat(pike_base_name+"/src/aclocal.m4"); 
 
  fix_configure(pike_base_name+"/src", aclocal); 
  fix_configure(pike_base_name+"/src/modules", aclocal); 
  fix_configure(pike_base_name+"/src/post_modules", aclocal); 
 
  foreach(get_dir(pike_base_name+"/src/modules"), string fn) 
    if(Stdio.is_dir(pike_base_name+"/src/modules/"+fn)) 
      fix_configure(pike_base_name+"/src/modules/"+fn, aclocal); 
  foreach(get_dir(pike_base_name+"/src/post_modules"), string fn) 
    if(Stdio.is_dir(pike_base_name+"/src/post_modules/"+fn)) 
      fix_configure(pike_base_name+"/src/post_modules/"+fn, aclocal); 
 
  rm(vpath); 
  symlink(".", vpath); 
 
  files = build_file_list(export_list); 
  if(!files) 
    clean_exit(1, "Unable to build file list.\n"); 
 
  Stdio.write_file("buildid.txt", replace(stamp, symbols)); 
  files += ({ vpath+"/buildid.txt" }); 
 
  werror("Creating "+filename+".tar.gz.\n"); 
 
  int first = 1; 
  foreach(files/25.0, files) 
  { 
    run( "tar", first?"cf":"rf", pike_base_name+"/"+filename+".tar", @files ) 
    { 
      clean_exit(1, "Tar file creation failed!\n"); 
    }; 
    first = 0; 
  } 
 
  rm(vpath); 
  string build = sprintf("%s-%s-%s", uname()->sysname, uname()->release, 
                         uname()->machine); 
  build = "build/"+replace(lower_case(build), ({ " ", "/", "(", ")" }), 
                           ({ "-", "_", "_", "_" })); 
  if(file_stat(build+"/autodoc.xml") && file_stat(build+"/doc_build/images")) { 
    mkdir(vpath); 
    mkdir(vpath+"/refdoc"); 
    Stdio.cp(build+"/autodoc.xml", vpath+"/refdoc/autodoc.xml"); 
    run( "cp", "-R", build+"/doc_build/images", vpath+"/refdoc/images" ); 
    run( "tar", "rf", pike_base_name+"/"+filename+".tar", 
         vpath+"/refdoc/autodoc.xml", vpath+"/refdoc/images" ) 
    { 
      clean_exit(1, "Tar file creation failed!\n"); 
    }; 
    Stdio.recursive_rm(vpath); 
  } 
 
  rm(pike_base_name+"/"+filename+".tar.gz"); 
  run( "gzip", "-9", pike_base_name+"/"+filename+".tar" ) 
  { 
    clean_exit(1, "Gzip failed!\n"); 
  }; 
 
  clean_exit(0, "Done.\n"); 
} 
 
constant documentation = #" 
Usage: export.pike <arguments> <except modules> 
 
Creates a pike distribution. Needs one tar and one gzip binary in the 
path. The modules listed in <except modules> will not be included in 
the exported Pike. 
 
Mandatory arguments: 
 
--name=<name> 
        Name of export archive (%maj, %min, %bld, %Y, %M, %D, %h, %m, %s 
        are replaced with apropiate values). 
--exportlist=<listfile> 
        A file which lists all the files and directories to be exported. 
--srcdir=<dir> 
        The path to Pike source directory. 
 
Optional arguments: 
 
--timestamp=<int> 
        The timestamp of the build, if other than the real one. 
--tag   Bump the Pike build version and tag git. 
--force 
        Force export, ignore missing files. 
--snapshot 
        Use the generic name \"Pike-%maj.%min-snapshot\" for the 
        base directory, instead of the same as the one specified 
        with --name. 
--help  Show this text. 
";