path: root/Documentation
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authorJeff King <>2016-01-26 03:00:05 (GMT)
committerJunio C Hamano <>2016-01-26 21:34:10 (GMT)
commit0571979bd60837d3c0802ecc1a47c48b4a6114d0 (patch)
tree673bf4023f54ab159385086c02a91d5a33283230 /Documentation
parent1d094db936331abc42d859269181272a8539c7ae (diff)
tag: do not show ambiguous tag names as "tags/foo"
Since b7cc53e9 (tag.c: use 'ref-filter' APIs, 2015-07-11), git-tag has started showing tags with ambiguous names (i.e., when both "heads/foo" and "tags/foo" exists) as "tags/foo" instead of just "foo". This is both: - pointless; the output of "git tag" includes only refs/tags, so we know that "foo" means the one in "refs/tags". and - ambiguous; in the original output, we know that the line "foo" means that "refs/tags/foo" exists. In the new output, it is unclear whether we mean "refs/tags/foo" or "refs/tags/tags/foo". The reason this happens is that commit b7cc53e9 switched git-tag to use ref-filter's "%(refname:short)" output formatting, which was adapted from for-each-ref. This more general code does not know that we care only about tags, and uses shorten_unambiguous_ref to get the short-name. We need to tell it that we care only about "refs/tags/", and it should shorten with respect to that value. In theory, the ref-filter code could figure this out by us passing FILTER_REFS_TAGS. But there are two complications there: 1. The handling of refname:short is deep in formatting code that does not even have our ref_filter struct, let alone the arguments to the filter_ref struct. 2. In git v2.7.0, we expose the formatting language to the user. If we follow this path, it will mean that "%(refname:short)" behaves differently for "tag" versus "for-each-ref" (including "for-each-ref refs/tags/"), which can lead to confusion. Instead, let's add a new modifier to the formatting language, "strip", to remove a specific set of prefix components. This fixes "git tag", and lets users invoke the same behavior from their own custom formats (for "tag" or "for-each-ref") while leaving ":short" with its same consistent meaning in all places. We introduce a test in t7004 for "git tag", which fails without this patch. We also add a similar test in t3203 for "git branch", which does not actually fail. But since it is likely that "branch" will eventually use the same formatting code, the test helps defend against future regressions. Signed-off-by: Jeff King <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'Documentation')
2 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index c6f073c..d5e1781 100644
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -92,7 +92,11 @@ refname::
The name of the ref (the part after $GIT_DIR/).
For a non-ambiguous short name of the ref append `:short`.
The option core.warnAmbiguousRefs is used to select the strict
- abbreviation mode.
+ abbreviation mode. If `strip=<N>` is appended, strips `<N>`
+ slash-separated path components from the front of the refname
+ (e.g., `%(refname:strip=2)` turns `refs/tags/foo` into `foo`.
+ `<N>` must be a positive integer. If a displayed ref has fewer
+ components than `<N>`, the command aborts with an error.
The type of the object (`blob`, `tree`, `commit`, `tag`).
diff --git a/Documentation/git-tag.txt b/Documentation/git-tag.txt
index 7220e5e..abab481 100644
--- a/Documentation/git-tag.txt
+++ b/Documentation/git-tag.txt
@@ -163,7 +163,7 @@ This option is only applicable when listing tags without annotation lines.
A string that interpolates `%(fieldname)` from the object
pointed at by a ref being shown. The format is the same as
that of linkgit:git-for-each-ref[1]. When unspecified,
- defaults to `%(refname:short)`.
+ defaults to `%(refname:strip=2)`.
--[no-]merged [<commit>]::
Only list tags whose tips are reachable, or not reachable