Merge branch 'jc/streaming-filter' into next

* jc/streaming-filter:
t0021: test application of both crlf and ident
t0021-conversion.sh: fix NoTerminatingSymbolAtEOF test
streaming: filter cascading
streaming filter: ident filter
Add LF-to-CRLF streaming conversion
stream filter: add "no more input" to the filters
Add streaming filter API
convert.h: move declarations for conversion from cache.h

diff --combined cache.h
index 79c9302e22bddb9816d01a6e9d79206b21d03d4b,c781c118d253572930061fb5e3263027076dd3a1..bc9e5eb15e23c23b41b76e1f353e078ea3858344
--- 1/cache.h
--- 2/cache.h
+++ b/cache.h
@@@ -6,6 -6,7 +6,7 @@@
  #include "hash.h"
  #include "advice.h"
  #include "gettext.h"
+ #include "convert.h"
  
  #include SHA1_HEADER
  #ifndef git_SHA_CTX
@@@ -582,35 -583,6 +583,6 @@@ extern int fsync_object_files
  extern int core_preload_index;
  extern int core_apply_sparse_checkout;
  
- enum safe_crlf {
-       SAFE_CRLF_FALSE = 0,
-       SAFE_CRLF_FAIL = 1,
-       SAFE_CRLF_WARN = 2
- };
- 
- extern enum safe_crlf safe_crlf;
- 
- enum auto_crlf {
-       AUTO_CRLF_FALSE = 0,
-       AUTO_CRLF_TRUE = 1,
-       AUTO_CRLF_INPUT = -1
- };
- 
- extern enum auto_crlf auto_crlf;
- 
- enum eol {
-       EOL_UNSET,
-       EOL_CRLF,
-       EOL_LF,
- #ifdef NATIVE_CRLF
-       EOL_NATIVE = EOL_CRLF
- #else
-       EOL_NATIVE = EOL_LF
- #endif
- };
- 
- extern enum eol core_eol;
- 
  enum branch_track {
        BRANCH_TRACK_UNSPECIFIED = -1,
        BRANCH_TRACK_NEVER = 0,
@@@ -747,7 -719,7 +719,7 @@@ extern char *expand_user_path(const cha
  char *enter_repo(char *path, int strict);
  static inline int is_absolute_path(const char *path)
  {
 -      return path[0] == '/' || has_dos_drive_prefix(path);
 +      return is_dir_sep(path[0]) || has_dos_drive_prefix(path);
  }
  int is_directory(const char *);
  const char *real_path(const char *path);
@@@ -816,15 -788,15 +788,15 @@@ struct object_context 
  };
  
  extern int get_sha1(const char *str, unsigned char *sha1);
 -extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int gently, const char *prefix);
 +extern int get_sha1_with_mode_1(const char *str, unsigned char *sha1, unsigned *mode, int only_to_die, const char *prefix);
  static inline int get_sha1_with_mode(const char *str, unsigned char *sha1, unsigned *mode)
  {
 -      return get_sha1_with_mode_1(str, sha1, mode, 1, NULL);
 +      return get_sha1_with_mode_1(str, sha1, mode, 0, NULL);
  }
 -extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int gently, const char *prefix);
 +extern int get_sha1_with_context_1(const char *name, unsigned char *sha1, struct object_context *orc, int only_to_die, const char *prefix);
  static inline int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
  {
 -      return get_sha1_with_context_1(str, sha1, orc, 1, NULL);
 +      return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
  }
  extern int get_sha1_hex(const char *hex, unsigned char *sha1);
  extern char *sha1_to_hex(const unsigned char *sha1);  /* static buffer result! */
@@@ -991,7 -963,6 +963,7 @@@ extern struct ref *find_ref_by_name(con
  extern char *git_getpass(const char *prompt);
  extern struct child_process *git_connect(int fd[2], const char *url, const char *prog, int flags);
  extern int finish_connect(struct child_process *conn);
 +extern int git_connection_is_socket(struct child_process *conn);
  extern int path_match(const char *path, int nr, char **match);
  struct extra_have_objects {
        int nr, alloc;
@@@ -1059,20 -1030,12 +1031,20 @@@ extern int sha1_object_info_extended(co
  /* Dumb servers support */
  extern int update_server_info(int);
  
 +/* git_config_parse_key() returns these negated: */
 +#define CONFIG_INVALID_KEY 1
 +#define CONFIG_NO_SECTION_OR_NAME 2
 +/* git_config_set(), git_config_set_multivar() return the above or these: */
 +#define CONFIG_NO_LOCK -1
 +#define CONFIG_INVALID_FILE 3
 +#define CONFIG_NO_WRITE 4
 +#define CONFIG_NOTHING_SET 5
 +#define CONFIG_INVALID_PATTERN 6
 +
  typedef int (*config_fn_t)(const char *, const char *, void *);
  extern int git_default_config(const char *, const char *, void *);
  extern int git_config_from_file(config_fn_t fn, const char *, void *);
  extern void git_config_push_parameter(const char *text);
 -extern int git_config_parse_parameter(const char *text);
 -extern int git_config_parse_environment(void);
  extern int git_config_from_parameters(config_fn_t fn, void *data);
  extern int git_config(config_fn_t fn, void *);
  extern int git_config_early(config_fn_t fn, void *, const char *repo_config);
@@@ -1162,14 -1125,6 +1134,6 @@@ extern void trace_strbuf(const char *ke
  
  void packet_trace_identity(const char *prog);
  
- /* convert.c */
- /* returns 1 if *dst was used */
- extern int convert_to_git(const char *path, const char *src, size_t len,
-                           struct strbuf *dst, enum safe_crlf checksafe);
- extern int convert_to_working_tree(const char *path, const char *src, size_t len, struct strbuf *dst);
- extern int renormalize_buffer(const char *path, const char *src, size_t len, struct strbuf *dst);
- extern int can_bypass_conversion(const char *path);
- 
  /* add */
  /*
   * return 0 if success, 1 - if addition of a file failed and