[PATCH v3] Add new @ shortcut for HEAD
- From
Felipe Contreras <felipe.contreras@gmail.com>
- Date
- May 1, 2013, 09:51 UTC
- Message-ID
- <1367401888-21055-1-git-send-email-felipe.contreras@gmail.com>
So HEAD@{0}~0^0 is too much to type, but we can remove '^0', and we can remove '~0', and we can remove 'HEAD', which leaves us with @{0}, but we can't remove '{0}'?
This patch allows '@' to be the same as 'HEAD'.
So now we can use 'git show @~1', and all that goody goodness.
Until now '@' was a valid name, but it conflicts with this idea, so lets make it invalid. Probably very few people, if any, used this name.
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com> ---
Drop the last two patches of the previous series, and replace with this one, which is the real deal ;)
Documentation/git-check-ref-format.txt | 2 ++ Documentation/revisions.txt | 3 +++ refs.c | 4 ++++ sha1_name.c | 17 +++++++++++++++++ t/t1508-at-combinations.sh | 3 +++ 5 files changed, 29 insertions(+)
diff --git a/Documentation/git-check-ref-format.txt b/Documentation/git-check-ref-format.txt index ec1739a..e8035ec 100644 --- a/Documentation/git-check-ref-format.txt +++ b/Documentation/git-check-ref-format.txt @@ -54,6 +54,8 @@ Git imposes the following rules on how references are named: . They cannot contain a sequence `@{`. +. They cannot be the single character `@`. + . They cannot contain a `\`. These rules make it easy for shell script based tools to parse diff --git a/Documentation/revisions.txt b/Documentation/revisions.txt index d477b3f..09896a3 100644 --- a/Documentation/revisions.txt +++ b/Documentation/revisions.txt @@ -58,6 +58,9 @@ the '$GIT_DIR/refs' directory or from the '$GIT_DIR/packed-refs' file. While the ref name encoding is unspecified, UTF-8 is preferred as some output processing may assume ref names in UTF-8. +'@':: + '@' alone is a shortcut for 'HEAD'. + '<refname>@\{<date>\}', e.g. 'master@\{yesterday\}', 'HEAD@\{5 minutes ago\}':: A ref followed by the suffix '@' with a date specification enclosed in a brace diff --git a/refs.c b/refs.c index de2d8eb..4e70b3e 100644 --- a/refs.c +++ b/refs.c @@ -72,6 +72,10 @@ int check_refname_format(const char *refname, int flags) { int component_len, component_count = 0; + if (!strcmp(refname, "@")) + /* Refname is a single character '@'. */ + return -1; + while (1) { /* We are at the start of a path component. */ component_len = check_refname_component(refname, flags); diff --git a/sha1_name.c b/sha1_name.c index 76e3219..3b06e5e 100644 --- a/sha1_name.c +++ b/sha1_name.c @@ -965,6 +965,17 @@ int get_sha1_mb(const char *name, unsigned char *sha1) return st; } +/* parse @something syntax, when 'something' is not {.*} */ +static int interpret_empty_at(const char *name, int namelen, int len, struct strbuf *buf) +{ + if (len || name[1] == '{') + return -1; + + strbuf_reset(buf); + strbuf_add(buf, "HEAD", 4); + return 1; +} + static int reinterpret(const char *name, int namelen, int len, struct strbuf *buf) { /* we have extra data, which might need further processing */ @@ -1025,9 +1036,15 @@ int interpret_branch_name(const char *name, struct strbuf *buf) cp = strchr(name, '@'); if (!cp) return -1; + + len = interpret_empty_at(name, namelen, cp - name, buf); + if (len > 0) + return reinterpret(name, namelen, len, buf); + tmp_len = upstream_mark(cp, namelen - (cp - name)); if (!tmp_len) return -1; + len = cp + tmp_len - name; cp = xstrndup(name, cp - name); upstream = branch_get(*cp ? cp : NULL); diff --git a/t/t1508-at-combinations.sh b/t/t1508-at-combinations.sh index d5d6244..65584c0 100755 --- a/t/t1508-at-combinations.sh +++ b/t/t1508-at-combinations.sh @@ -45,6 +45,9 @@ check "@{u}" upstream-two check "@{u}@{1}" upstream-one check "@{-1}@{u}" master-two check "@{-1}@{u}@{1}" master-one +check "@" new-two +check "HEAD@{u}" upstream-two +check "@@{u}" upstream-two nonsense "@{u}@{-1}" nonsense "@{1}@{u}"
-- 1.8.3.rc0.399.gc96a135