The new function is based on print_color_indicator() from commit
7326d1f1a67edf21947ae98194f98c38b6e9e527 in coreutils.git.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
Signed-off-by: Junio C Hamano <gits...@pobox.com>
---
 color.h     |  2 ++
 ls_colors.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+)

diff --git a/color.h b/color.h
index 3eaa5bd..b6904a3 100644
--- a/color.h
+++ b/color.h
@@ -94,5 +94,7 @@ void color_print_strbuf(FILE *fp, const char *color, const 
struct strbuf *sb);
 int color_is_nil(const char *color);
 
 void parse_ls_color(void);
+void color_filename(struct strbuf *sb, const char *name,
+                   const char *display_name, mode_t mode, int linkok);
 
 #endif /* COLOR_H */
diff --git a/ls_colors.c b/ls_colors.c
index 08e7068..7d2e2e0 100644
--- a/ls_colors.c
+++ b/ls_colors.c
@@ -422,3 +422,69 @@ void parse_ls_color(void)
                color_symlink_as_referent = 1;
        git_config(ls_colors_config, NULL);
 }
+
+void color_filename(struct strbuf *sb, const char *name,
+                   const char *display_name, mode_t mode, int linkok)
+{
+       int type;
+       struct color_ext_type *ext;     /* Color extension */
+
+       if (S_ISREG(mode)) {
+               type = LS_FL;
+               if ((mode & S_ISUID) != 0)
+                       type = LS_SU;
+               else if ((mode & S_ISGID) != 0)
+                       type = LS_SG;
+               else if ((mode & (S_IXUSR | S_IXGRP | S_IXOTH)) != 0)
+                       type = LS_EX;
+       } else if (S_ISDIR(mode)) {
+               if ((mode & S_ISVTX) && (mode & S_IWOTH))
+                       type = LS_TW;
+               else if ((mode & S_IWOTH) != 0)
+                       type = LS_OW;
+               else if ((mode & S_ISVTX) != 0)
+                       type = LS_ST;
+               else
+                       type = LS_DI;
+       } else if (S_ISLNK(mode))
+               type = (!linkok && *ls_colors[LS_OR]) ? LS_OR : LS_LN;
+       else if (S_ISFIFO(mode))
+               type = LS_PI;
+       else if (S_ISSOCK(mode))
+               type = LS_SO;
+       else if (S_ISBLK(mode))
+               type = LS_BD;
+       else if (S_ISCHR(mode))
+               type = LS_CD;
+#ifdef S_ISDOOR
+       else if (S_ISDOOR(mode))
+               type = LS_DO;
+#endif
+       else
+               /* Classify a file of some other type as C_ORPHAN.  */
+               type = LS_OR;
+
+       /* Check the file's suffix only if still classified as C_FILE.  */
+       ext = NULL;
+       if (type == LS_FL) {
+               /* Test if NAME has a recognized suffix.  */
+               size_t len = strlen(name);
+               const char *p = name + len;             /* Pointer to final \0. 
 */
+               for (ext = color_ext_list; ext != NULL; ext = ext->next) {
+                       if (ext->ext.len <= len &&
+                           !strncmp(p - ext->ext.len, ext->ext.string, 
ext->ext.len))
+                               break;
+               }
+       }
+
+       if (display_name)
+               name = display_name;
+       if (ext)
+               strbuf_addf(sb, "\033[%.*sm%s%s",
+                           (int)ext->seq.len, ext->seq.string,
+                           name, GIT_COLOR_RESET);
+       else if (*ls_colors[type])
+               strbuf_addf(sb, "%s%s%s", ls_colors[type], name, 
GIT_COLOR_RESET);
+       else
+               strbuf_addstr(sb, name);
+}
-- 
2.2.0.84.ge9c7a8a

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