895680f044
When a contributor asks the integrator to merge her history, a signed tag can be a good vehicle to communicate the authenticity of the request while conveying other information such as the purpose of the topic. E.g. a signed tag "for-linus" can be created, and the integrator can run: $ git pull git://example.com/work.git/ for-linus This would allow the integrator to run "git verify-tag FETCH_HEAD" to validate the signed tag. Update fmt-merge-msg so that it pre-fills the merge message template with the body (but not signature) of the tag object to help the integrator write a better merge message, in the same spirit as the existing merge.log summary lines. The message that comes from GPG signature validation is also included in the merge message template to help the integrator verify it, but they are prefixed with "#" to make them comments. Signed-off-by: Junio C Hamano <gitster@pobox.com>
414 lines
8.3 KiB
C
414 lines
8.3 KiB
C
#include "cache.h"
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#include "refs.h"
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int prefixcmp(const char *str, const char *prefix)
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{
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for (; ; str++, prefix++)
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if (!*prefix)
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return 0;
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else if (*str != *prefix)
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return (unsigned char)*prefix - (unsigned char)*str;
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}
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int suffixcmp(const char *str, const char *suffix)
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{
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int len = strlen(str), suflen = strlen(suffix);
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if (len < suflen)
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return -1;
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else
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return strcmp(str + len - suflen, suffix);
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}
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/*
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* Used as the default ->buf value, so that people can always assume
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* buf is non NULL and ->buf is NUL terminated even for a freshly
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* initialized strbuf.
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*/
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char strbuf_slopbuf[1];
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void strbuf_init(struct strbuf *sb, size_t hint)
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{
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sb->alloc = sb->len = 0;
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sb->buf = strbuf_slopbuf;
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if (hint)
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strbuf_grow(sb, hint);
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}
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void strbuf_release(struct strbuf *sb)
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{
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if (sb->alloc) {
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free(sb->buf);
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strbuf_init(sb, 0);
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}
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}
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char *strbuf_detach(struct strbuf *sb, size_t *sz)
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{
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char *res = sb->alloc ? sb->buf : NULL;
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if (sz)
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*sz = sb->len;
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strbuf_init(sb, 0);
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return res;
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}
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void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
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{
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strbuf_release(sb);
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sb->buf = buf;
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sb->len = len;
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sb->alloc = alloc;
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strbuf_grow(sb, 0);
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sb->buf[sb->len] = '\0';
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}
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void strbuf_grow(struct strbuf *sb, size_t extra)
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{
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int new_buf = !sb->alloc;
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if (unsigned_add_overflows(extra, 1) ||
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unsigned_add_overflows(sb->len, extra + 1))
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die("you want to use way too much memory");
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if (new_buf)
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sb->buf = NULL;
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ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
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if (new_buf)
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sb->buf[0] = '\0';
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}
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void strbuf_trim(struct strbuf *sb)
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{
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char *b = sb->buf;
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while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
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sb->len--;
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while (sb->len > 0 && isspace(*b)) {
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b++;
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sb->len--;
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}
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memmove(sb->buf, b, sb->len);
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sb->buf[sb->len] = '\0';
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}
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void strbuf_rtrim(struct strbuf *sb)
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{
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while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
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sb->len--;
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sb->buf[sb->len] = '\0';
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}
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void strbuf_ltrim(struct strbuf *sb)
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{
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char *b = sb->buf;
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while (sb->len > 0 && isspace(*b)) {
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b++;
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sb->len--;
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}
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memmove(sb->buf, b, sb->len);
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sb->buf[sb->len] = '\0';
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}
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struct strbuf **strbuf_split_buf(const char *str, size_t slen, int delim, int max)
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{
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int alloc = 2, pos = 0;
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const char *n, *p;
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struct strbuf **ret;
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struct strbuf *t;
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ret = xcalloc(alloc, sizeof(struct strbuf *));
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p = n = str;
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while (n < str + slen) {
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int len;
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if (max <= 0 || pos + 1 < max)
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n = memchr(n, delim, slen - (n - str));
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else
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n = NULL;
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if (pos + 1 >= alloc) {
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alloc = alloc * 2;
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ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
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}
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if (!n)
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n = str + slen - 1;
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len = n - p + 1;
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t = xmalloc(sizeof(struct strbuf));
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strbuf_init(t, len);
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strbuf_add(t, p, len);
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ret[pos] = t;
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ret[++pos] = NULL;
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p = ++n;
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}
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return ret;
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}
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void strbuf_list_free(struct strbuf **sbs)
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{
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struct strbuf **s = sbs;
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while (*s) {
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strbuf_release(*s);
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free(*s++);
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}
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free(sbs);
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}
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int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
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{
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int len = a->len < b->len ? a->len: b->len;
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int cmp = memcmp(a->buf, b->buf, len);
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if (cmp)
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return cmp;
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return a->len < b->len ? -1: a->len != b->len;
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}
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void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
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const void *data, size_t dlen)
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{
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if (unsigned_add_overflows(pos, len))
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die("you want to use way too much memory");
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if (pos > sb->len)
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die("`pos' is too far after the end of the buffer");
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if (pos + len > sb->len)
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die("`pos + len' is too far after the end of the buffer");
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if (dlen >= len)
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strbuf_grow(sb, dlen - len);
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memmove(sb->buf + pos + dlen,
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sb->buf + pos + len,
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sb->len - pos - len);
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memcpy(sb->buf + pos, data, dlen);
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strbuf_setlen(sb, sb->len + dlen - len);
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}
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void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
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{
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strbuf_splice(sb, pos, 0, data, len);
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}
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void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
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{
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strbuf_splice(sb, pos, len, NULL, 0);
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}
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void strbuf_add(struct strbuf *sb, const void *data, size_t len)
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{
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strbuf_grow(sb, len);
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memcpy(sb->buf + sb->len, data, len);
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strbuf_setlen(sb, sb->len + len);
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}
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void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
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{
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strbuf_grow(sb, len);
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memcpy(sb->buf + sb->len, sb->buf + pos, len);
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strbuf_setlen(sb, sb->len + len);
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}
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void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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strbuf_vaddf(sb, fmt, ap);
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va_end(ap);
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}
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void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
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{
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int len;
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va_list cp;
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if (!strbuf_avail(sb))
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strbuf_grow(sb, 64);
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va_copy(cp, ap);
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len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
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va_end(cp);
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if (len < 0)
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die("BUG: your vsnprintf is broken (returned %d)", len);
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if (len > strbuf_avail(sb)) {
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strbuf_grow(sb, len);
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len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
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if (len > strbuf_avail(sb))
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die("BUG: your vsnprintf is broken (insatiable)");
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}
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strbuf_setlen(sb, sb->len + len);
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}
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void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
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void *context)
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{
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for (;;) {
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const char *percent;
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size_t consumed;
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percent = strchrnul(format, '%');
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strbuf_add(sb, format, percent - format);
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if (!*percent)
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break;
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format = percent + 1;
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if (*format == '%') {
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strbuf_addch(sb, '%');
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format++;
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continue;
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}
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consumed = fn(sb, format, context);
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if (consumed)
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format += consumed;
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else
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strbuf_addch(sb, '%');
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}
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}
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size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
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void *context)
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{
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struct strbuf_expand_dict_entry *e = context;
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size_t len;
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for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
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if (!strncmp(placeholder, e->placeholder, len)) {
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if (e->value)
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strbuf_addstr(sb, e->value);
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return len;
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}
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}
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return 0;
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}
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void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
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{
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int i, len = src->len;
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for (i = 0; i < len; i++) {
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if (src->buf[i] == '%')
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strbuf_addch(dst, '%');
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strbuf_addch(dst, src->buf[i]);
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}
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}
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size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
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{
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size_t res;
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size_t oldalloc = sb->alloc;
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strbuf_grow(sb, size);
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res = fread(sb->buf + sb->len, 1, size, f);
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if (res > 0)
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strbuf_setlen(sb, sb->len + res);
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else if (oldalloc == 0)
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strbuf_release(sb);
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return res;
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}
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ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
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{
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size_t oldlen = sb->len;
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size_t oldalloc = sb->alloc;
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strbuf_grow(sb, hint ? hint : 8192);
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for (;;) {
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ssize_t cnt;
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cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
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if (cnt < 0) {
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if (oldalloc == 0)
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strbuf_release(sb);
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else
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strbuf_setlen(sb, oldlen);
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return -1;
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}
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if (!cnt)
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break;
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sb->len += cnt;
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strbuf_grow(sb, 8192);
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}
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sb->buf[sb->len] = '\0';
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return sb->len - oldlen;
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}
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#define STRBUF_MAXLINK (2*PATH_MAX)
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int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
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{
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size_t oldalloc = sb->alloc;
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if (hint < 32)
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hint = 32;
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while (hint < STRBUF_MAXLINK) {
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int len;
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strbuf_grow(sb, hint);
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len = readlink(path, sb->buf, hint);
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if (len < 0) {
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if (errno != ERANGE)
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break;
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} else if (len < hint) {
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strbuf_setlen(sb, len);
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return 0;
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}
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/* .. the buffer was too small - try again */
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hint *= 2;
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}
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if (oldalloc == 0)
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strbuf_release(sb);
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return -1;
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}
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int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
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{
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int ch;
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if (feof(fp))
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return EOF;
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strbuf_reset(sb);
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while ((ch = fgetc(fp)) != EOF) {
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strbuf_grow(sb, 1);
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sb->buf[sb->len++] = ch;
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if (ch == term)
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break;
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}
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if (ch == EOF && sb->len == 0)
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return EOF;
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sb->buf[sb->len] = '\0';
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return 0;
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}
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int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
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{
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if (strbuf_getwholeline(sb, fp, term))
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return EOF;
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if (sb->buf[sb->len-1] == term)
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strbuf_setlen(sb, sb->len-1);
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return 0;
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}
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int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
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{
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int fd, len;
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fd = open(path, O_RDONLY);
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if (fd < 0)
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return -1;
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len = strbuf_read(sb, fd, hint);
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close(fd);
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if (len < 0)
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return -1;
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return len;
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}
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void strbuf_add_lines(struct strbuf *out, const char *prefix,
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const char *buf, size_t size)
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{
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while (size) {
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const char *next = memchr(buf, '\n', size);
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next = next ? (next + 1) : (buf + size);
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strbuf_addstr(out, prefix);
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strbuf_add(out, buf, next - buf);
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size -= next - buf;
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buf = next;
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}
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strbuf_complete_line(out);
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}
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