#include "git-compat-util.h"

#include "version.h"

#include "strbuf.h"

#include "gettext.h"

#ifndef GIT_VERSION_H

# include "version-def.h"

#else

# include GIT_VERSION_H

#endif

const char git_version_string[] = GIT_VERSION;

const char git_built_from_commit_string[] = GIT_BUILT_FROM_COMMIT;

/*

 * Trim and replace each character with ascii code below 32 or above

 * 127 (included) using a dot '.' character.

 */

static void redact_non_printables(struct strbuf *buf)

{

  strbuf_trim(buf);

  for (size_t i = 0; i < buf->len; i++) {

    if (!isprint(buf->buf[i]) || buf->buf[i] == ' ')

      buf->buf[i] = '.';

  }

}

const char *git_user_agent(void)

{

  static const char *agent = NULL;

  if (!agent) {

    agent = getenv("GIT_USER_AGENT");

    if (!agent)

      agent = GIT_USER_AGENT;

  }

  return agent;

}

/*

  Retrieve, sanitize and cache operating system info for subsequent

  calls. Return a pointer to the sanitized operating system info

  string.

*/

static const char *os_info(void)

{

  static const char *os = NULL;

  if (!os) {

    struct strbuf buf = STRBUF_INIT;

    get_uname_info(&buf, 0);

    /* Sanitize the os information immediately */

    redact_non_printables(&buf);

    os = strbuf_detach(&buf, NULL);

  }

  return os;

}

const char *git_user_agent_sanitized(void)

{

  static const char *agent = NULL;

  if (!agent) {

    struct strbuf buf = STRBUF_INIT;

    strbuf_addstr(&buf, git_user_agent());

    if (!getenv("GIT_USER_AGENT")) {

      strbuf_addch(&buf, '-');

      strbuf_addstr(&buf, os_info());

    }

    redact_non_printables(&buf);

    agent = strbuf_detach(&buf, NULL);

  }

  return agent;

}

int get_uname_info(struct strbuf *buf, unsigned int full)

{

  struct utsname uname_info;

  if (uname(&uname_info)) {

    strbuf_addf(buf, _("uname() failed with error '%s' (%d)\n"),

          strerror(errno),

          errno);

    return -1;

  }

  if (full)

    strbuf_addf(buf, "%s %s %s %s\n",

          uname_info.sysname,

          uname_info.release,

          uname_info.version,

          uname_info.machine);

  else

       strbuf_addf(buf, "%s\n", uname_info.sysname);

  return 0;

}