We do not want an ellipsis displayed following an (abbreviated) SHA-1
value.
The days when this was necessary to indicate the truncation to
lower-level Git commands and/or the user are bygone.
However, to ease the transition, the ellipsis will still be printed if
the user sets the environment variable GIT_PRINT_SHA1_ELLIPSIS to "yes".
Correct documentation with respect to what describe_detached_head prints
when GIT_PRINT_SHA1_ELLIPSIS is not set as indicated above.
Add tests for the old and new behaviour.
Signed-off-by: Ann T Ropea <bedhanger@xxxxxx>
---
v2: rename patch series & focus on removal of ellipses
v3: env var instead of config option, use one-line comments where appropriate, preserve indent level
v4: improve env var handling (rename, helper func to query, docu)
v5: rewrite series to take Junio's comments in <xmqqd145k9td.fsf@xxxxxxxxxxxxxxxxxxxxxxxxxxx> aboard
Documentation/user-manual.txt | 2 +-
builtin/checkout.c | 10 +++-
t/t2020-checkout-detach.sh | 106 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 115 insertions(+), 3 deletions(-)
diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
index 497e82e88dd0..eff78902742a 100644
--- a/Documentation/user-manual.txt
+++ b/Documentation/user-manual.txt
@@ -319,7 +319,7 @@ do so (now or later) by using -b with the checkout command again. Example:
git checkout -b new_branch_name
-HEAD is now at 427abfa... Linux v2.6.17
+HEAD is now at 427abfa Linux v2.6.17
------------------------------------------------
The HEAD then refers to the SHA-1 of the commit instead of to a branch,
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 3faae382de4f..b0499542158f 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -400,10 +400,16 @@ static void show_local_changes(struct object *head,
static void describe_detached_head(const char *msg, struct commit *commit)
{
struct strbuf sb = STRBUF_INIT;
+
if (!parse_commit(commit))
pp_commit_easy(CMIT_FMT_ONELINE, commit, &sb);
- fprintf(stderr, "%s %s... %s\n", msg,
- find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV), sb.buf);
+ if (print_sha1_ellipsis()) {
+ fprintf(stderr, "%s %s... %s\n", msg,
+ find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV), sb.buf);
+ } else {
+ fprintf(stderr, "%s %s %s\n", msg,
+ find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV), sb.buf);
+ }
strbuf_release(&sb);
}
diff --git a/t/t2020-checkout-detach.sh b/t/t2020-checkout-detach.sh
index fbb4ee9bb42d..9d42e38ed905 100755
--- a/t/t2020-checkout-detach.sh
+++ b/t/t2020-checkout-detach.sh
@@ -186,4 +186,110 @@ test_expect_success 'no advice given for explicit detached head state' '
test_cmp expect.no-advice actual
'
+# Detached HEAD tests for GIT_PRINT_SHA1_ELLIPSIS
+
+# The first detach operation is more chatty than the following ones.
+cat > 1st_detach <<'EOF'
+Note: checking out 'HEAD^'.
+
+You are in 'detached HEAD' state. You can look around, make experimental
+changes and commit them, and you can discard any commits you make in this
+state without impacting any branches by performing another checkout.
+
+If you want to create a new branch to retain commits you create, you may
+do so (now or later) by using -b with the checkout command again. Example:
+
+ git checkout -b <new-branch-name>
+
+HEAD is now at 7c7cd714e262 three
+EOF
+# The remaining ones just show info about previous and current HEADs.
+cat > 2nd_detach <<'EOF'
+Previous HEAD position was 7c7cd714e262 three
+HEAD is now at 139b20d8e6c5 two
+EOF
+cat > 3rd_detach <<'EOF'
+Previous HEAD position was 139b20d8e6c5 two
+HEAD is now at d79ce1670bdc one
+EOF
+test_expect_success 'describe_detached_head prints no SHA-1 ellipsis when not asked to' '
+ reset && check_not_detached && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ # Various ways of *not* asking for ellipses
+
+ unset GIT_PRINT_SHA1_ELLIPSIS && git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 1st_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ GIT_PRINT_SHA1_ELLIPSIS="no" git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 2nd_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ GIT_PRINT_SHA1_ELLIPSIS= git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 3rd_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ # We only have four commits, but we can re-use them
+ reset && check_not_detached && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ # Make no mention of the env var at all
+ git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 1st_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ GIT_PRINT_SHA1_ELLIPSIS='nope' && export GIT_PRINT_SHA1_ELLIPSIS && git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 2nd_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ GIT_PRINT_SHA1_ELLIPSIS=nein && export GIT_PRINT_SHA1_ELLIPSIS && git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 3rd_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ true
+'
+
+# The first detach operation is more chatty than the following ones.
+cat > 1st_detach <<'EOF'
+Note: checking out 'HEAD^'.
+
+You are in 'detached HEAD' state. You can look around, make experimental
+changes and commit them, and you can discard any commits you make in this
+state without impacting any branches by performing another checkout.
+
+If you want to create a new branch to retain commits you create, you may
+do so (now or later) by using -b with the checkout command again. Example:
+
+ git checkout -b <new-branch-name>
+
+HEAD is now at 7c7cd714e262... three
+EOF
+# The remaining ones just show info about previous and current HEADs.
+cat > 2nd_detach <<'EOF'
+Previous HEAD position was 7c7cd714e262... three
+HEAD is now at 139b20d8e6c5... two
+EOF
+cat > 3rd_detach <<'EOF'
+Previous HEAD position was 139b20d8e6c5... two
+HEAD is now at d79ce1670bdc... one
+EOF
+test_expect_success 'describe_detached_head does print SHA-1 ellipsis when asked to' '
+ reset && check_not_detached && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ # Various ways of asking for ellipses...
+
+ GIT_PRINT_SHA1_ELLIPSIS="yes" && export GIT_PRINT_SHA1_ELLIPSIS && git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 1st_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ GIT_PRINT_SHA1_ELLIPSIS='yes' git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 2nd_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ GIT_PRINT_SHA1_ELLIPSIS=yes git -c 'core.abbrev=12' checkout HEAD^ 1> actual 2>&1 &&
+ check_detached &&
+ test_cmp 3rd_detach actual && unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ true
+'
+
test_done
--
2.13.6
