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| author | Thomas Rast <trast@student.ethz.ch> | 2009-01-17 17:09:55 +0100 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2009-01-17 18:37:19 -0800 |
| commit | d18ba22154574390dbff2c060f44b9715477e95a (patch) | |
| tree | aad88747b04d28f49caf86c9ccb12400ff4c6c0d /sha1_name.c | |
| parent | a884d0cb71463c28d0329c593dce1ef9758f6177 (diff) | |
| download | git-d18ba22154574390dbff2c060f44b9715477e95a.tar.gz git-d18ba22154574390dbff2c060f44b9715477e95a.tar.xz | |
sha1_name: support @{-N} syntax in get_sha1()
Let get_sha1() parse the @{-N} syntax, with docs and tests.
Note that while @{-1}^2, @{-2}~5 and such are supported, @{-1}@{1} is
currently not allowed.
Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'sha1_name.c')
| -rw-r--r-- | sha1_name.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/sha1_name.c b/sha1_name.c index 34e39db65..9e1538e3d 100644 --- a/sha1_name.c +++ b/sha1_name.c @@ -297,6 +297,8 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log) return logs_found; } +static int get_sha1_1(const char *name, int len, unsigned char *sha1); + static int get_sha1_basic(const char *str, int len, unsigned char *sha1) { static const char *warning = "warning: refname '%.*s' is ambiguous.\n"; @@ -307,7 +309,7 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1) if (len == 40 && !get_sha1_hex(str, sha1)) return 0; - /* basic@{time or number} format to query ref-log */ + /* basic@{time or number or -number} format to query ref-log */ reflog_len = at = 0; if (str[len-1] == '}') { for (at = 0; at < len - 1; at++) { @@ -324,6 +326,16 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1) return -1; if (!len && reflog_len) { + struct strbuf buf = STRBUF_INIT; + int ret; + /* try the @{-N} syntax for n-th checkout */ + ret = interpret_nth_last_branch(str+at, &buf); + if (ret > 0) { + /* substitute this branch name and restart */ + return get_sha1_1(buf.buf, buf.len, sha1); + } else if (ret == 0) { + return -1; + } /* allow "@{...}" to mean the current branch reflog */ refs_found = dwim_ref("HEAD", 4, sha1, &real_ref); } else if (reflog_len) @@ -379,8 +391,6 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1) return 0; } -static int get_sha1_1(const char *name, int len, unsigned char *sha1); - static int get_parent(const char *name, int len, unsigned char *result, int idx) { |