transport: simplify duplicating a substring in transport_get() using xmemdupz()

diff --git a/strbuf.c b/strbuf.c
index 33018d847f08424211c02cff8002680f5a2f02e9..0346e74a47d14ef13757cadfe2a0de778b5c4cc4 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -204,6 +204,13 @@ void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
        strbuf_setlen(sb, sb->len + len);
 }
 
+void strbuf_addchars(struct strbuf *sb, int c, size_t n)
+{
+       strbuf_grow(sb, n);
+       memset(sb->buf + sb->len, c, n);
+       strbuf_setlen(sb, sb->len + n);
+}
+
 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
 {
        va_list ap;
@@ -406,6 +413,27 @@ int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
        return -1;
 }
 
+int strbuf_getcwd(struct strbuf *sb)
+{
+       size_t oldalloc = sb->alloc;
+       size_t guessed_len = 128;
+
+       for (;; guessed_len *= 2) {
+               strbuf_grow(sb, guessed_len);
+               if (getcwd(sb->buf, sb->alloc)) {
+                       strbuf_setlen(sb, strlen(sb->buf));
+                       return 0;
+               }
+               if (errno != ERANGE)
+                       break;
+       }
+       if (oldalloc == 0)
+               strbuf_release(sb);
+       else
+               strbuf_reset(sb);
+       return -1;
+}
+
 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
 {
        int ch;
@@ -555,6 +583,31 @@ void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes)
        }
 }
 
+void strbuf_add_absolute_path(struct strbuf *sb, const char *path)
+{
+       if (!*path)
+               die("The empty string is not a valid path");
+       if (!is_absolute_path(path)) {
+               struct stat cwd_stat, pwd_stat;
+               size_t orig_len = sb->len;
+               char *cwd = xgetcwd();
+               char *pwd = getenv("PWD");
+               if (pwd && strcmp(pwd, cwd) &&
+                   !stat(cwd, &cwd_stat) &&
+                   (cwd_stat.st_dev || cwd_stat.st_ino) &&
+                   !stat(pwd, &pwd_stat) &&
+                   pwd_stat.st_dev == cwd_stat.st_dev &&
+                   pwd_stat.st_ino == cwd_stat.st_ino)
+                       strbuf_addstr(sb, pwd);
+               else
+                       strbuf_addstr(sb, cwd);
+               if (sb->len > orig_len && !is_dir_sep(sb->buf[sb->len - 1]))
+                       strbuf_addch(sb, '/');
+               free(cwd);
+       }
+       strbuf_addstr(sb, path);
+}
+
 int printf_ln(const char *fmt, ...)
 {
        int ret;