This function checks a few different @{}-constructs. The
early part checks for and dispatches us to helpers for each
construct, but the code for handling @{upstream} is inline.
Let's factor this out into its own function. This makes
interpret_branch_name more readable, and will make it much
simpler to add more constructs in future patches.
While we're at it, let's also break apart the refactored
code into a few helper functions. These will be useful when
we implement similar @{upstream}-like constructs.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
sha1_name.c | 83 ++++++++++++++++++++++++++++++++++++++-----------------------
1 file changed, 52 insertions(+), 31 deletions(-)
diff --git a/sha1_name.c b/sha1_name.c
index 0c50801..50df5d4 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -1052,6 +1052,54 @@ static int reinterpret(const char *name, int namelen, int len, struct strbuf *bu
return ret - used + len;
}
+static void set_shortened_ref(struct strbuf *buf, const char *ref)
+{
+ char *s = shorten_unambiguous_ref(ref, 0);
+ strbuf_reset(buf);
+ strbuf_addstr(buf, s);
+ free(s);
+}
+
+static const char *get_upstream_branch(const char *branch_buf, int len)
+{
+ char *branch = xstrndup(branch_buf, len);
+ struct branch *upstream = branch_get(*branch ? branch : NULL);
+
+ /*
+ * Upstream can be NULL only if branch refers to HEAD and HEAD
+ * points to something different than a branch.
+ */
+ if (!upstream)
+ die(_("HEAD does not point to a branch"));
+ if (!upstream->merge || !upstream->merge[0]->dst) {
+ if (!ref_exists(upstream->refname))
+ die(_("No such branch: '%s'"), branch);
+ if (!upstream->merge) {
+ die(_("No upstream configured for branch '%s'"),
+ upstream->name);
+ }
+ die(
+ _("Upstream branch '%s' not stored as a remote-tracking branch"),
+ upstream->merge[0]->src);
+ }
+ free(branch);
+
+ return upstream->merge[0]->dst;
+}
+
+static int interpret_upstream_mark(const char *name, int namelen,
+ int at, struct strbuf *buf)
+{
+ int len;
+
+ len = upstream_mark(name + at, namelen - at);
+ if (!len)
+ return -1;
+
+ set_shortened_ref(buf, get_upstream_branch(name, at));
+ return len + at;
+}
+
/*
* This reads short-hand syntax that not only evaluates to a commit
* object name, but also can act as if the end user spelled the name
@@ -1076,9 +1124,7 @@ static int reinterpret(const char *name, int namelen, int len, struct strbuf *bu
int interpret_branch_name(const char *name, int namelen, struct strbuf *buf)
{
char *cp;
- struct branch *upstream;
int len = interpret_nth_prior_checkout(name, buf);
- int tmp_len;
if (!namelen)
namelen = strlen(name);
@@ -1100,36 +1146,11 @@ int interpret_branch_name(const char *name, int namelen, struct strbuf *buf)
if (len > 0)
return reinterpret(name, namelen, len, buf);
- tmp_len = upstream_mark(cp, namelen - (cp - name));
- if (!tmp_len)
- return -1;
+ len = interpret_upstream_mark(name, namelen, cp - name, buf);
+ if (len > 0)
+ return len;
- len = cp + tmp_len - name;
- cp = xstrndup(name, cp - name);
- upstream = branch_get(*cp ? cp : NULL);
- /*
- * Upstream can be NULL only if cp refers to HEAD and HEAD
- * points to something different than a branch.
- */
- if (!upstream)
- die(_("HEAD does not point to a branch"));
- if (!upstream->merge || !upstream->merge[0]->dst) {
- if (!ref_exists(upstream->refname))
- die(_("No such branch: '%s'"), cp);
- if (!upstream->merge) {
- die(_("No upstream configured for branch '%s'"),
- upstream->name);
- }
- die(
- _("Upstream branch '%s' not stored as a remote-tracking branch"),
- upstream->merge[0]->src);
- }
- free(cp);
- cp = shorten_unambiguous_ref(upstream->merge[0]->dst, 0);
- strbuf_reset(buf);
- strbuf_addstr(buf, cp);
- free(cp);
- return len;
+ return -1;
}
int strbuf_branchname(struct strbuf *sb, const char *name)
--
1.8.5.2.500.g8060133
--
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