[PATCH 2/3] vcs_info: Deduplicate calling the set-branch-format hook.

[Daniel Shahaf <d.s@xxxxxxxxxxxxxxxxxx>]

---
svk and p4 are untested.

 .../VCS_Info/Backends/VCS_INFO_get_data_bzr   | 11 ++--------
 .../VCS_Info/Backends/VCS_INFO_get_data_p4    | 10 ++-------
 .../VCS_Info/Backends/VCS_INFO_get_data_svk   | 10 ++-------
 .../VCS_Info/Backends/VCS_INFO_get_data_svn   | 10 ++-------
 Functions/VCS_Info/VCS_INFO_set-branch-format | 22 +++++++++++++++++++
 Functions/VCS_Info/vcs_info                   |  1 +
 6 files changed, 31 insertions(+), 33 deletions(-)
 create mode 100644 Functions/VCS_Info/VCS_INFO_set-branch-format

diff --git a/Functions/VCS_Info/Backends/VCS_INFO_get_data_bzr b/Functions/VCS_Info/Backends/VCS_INFO_get_data_bzr
index b30e0e12b..f1f5527e8 100644
--- a/Functions/VCS_Info/Backends/VCS_INFO_get_data_bzr
+++ b/Functions/VCS_Info/Backends/VCS_INFO_get_data_bzr
@@ -100,14 +100,7 @@ else
 fi
 
 rrn=${bzrbase:t}
-zstyle -s ":vcs_info:${vcs}:${usercontext}:${rrn}" branchformat bzrbr || bzrbr="%b:%r"
-hook_com=( branch "${bzrinfo[2]}" revision "${bzrinfo[1]}" )
-if VCS_INFO_hook 'set-branch-format' "${bzrbr}"; then
-    zformat -f bzrbr "${bzrbr}" "b:${hook_com[branch]}" "r:${hook_com[revision]}"
-else
-    bzrbr=${hook_com[branch-replace]}
-fi
-hook_com=()
-
+VCS_INFO_set-branch-format "${bzrinfo[2]}" "${bzrinfo[1]}" &&
+    bzrbr="${REPLY}"
 VCS_INFO_formats '' "${bzrbr}" "${bzrbase}" '' "${bzr_changes}" "${bzrinfo[1]}" "${bzr_changes}"
 return 0
diff --git a/Functions/VCS_Info/Backends/VCS_INFO_get_data_p4 b/Functions/VCS_Info/Backends/VCS_INFO_get_data_p4
index 815924c26..e8a08a663 100644
--- a/Functions/VCS_Info/Backends/VCS_INFO_get_data_p4
+++ b/Functions/VCS_Info/Backends/VCS_INFO_get_data_p4
@@ -18,13 +18,7 @@ local p4branch change
 # I suppose the following might be slow on a tortuous client view.
 change="${${$(${vcs_comm[cmd]} changes -m 1 ...\#have)##Change }%% *}"
 rrn=${p4base:t}
-zstyle -s ":vcs_info:${vcs}:${usercontext}:${rrn}" branchformat p4branch || p4branch="%b:%r"
-hook_com=( branch "${p4info[Client_name]}" revision "${change}" )
-if VCS_INFO_hook 'set-branch-format' "${p4branch}"; then
-    zformat -f p4branch "${p4branch}" "b:${hook_com[branch]}" "r:${hook_com[revision]}"
-else
-    p4branch=${hook_com[branch-replace]}
-fi
-hook_com=()
+VCS_INFO_set-branch-format "${p4info[Client_name]}" "${change}" &&
+    p4branch="${REPLY}"
 VCS_INFO_formats '' "${p4branch}" "${p4base}" '' '' "$change" ''
 return 0
diff --git a/Functions/VCS_Info/Backends/VCS_INFO_get_data_svk b/Functions/VCS_Info/Backends/VCS_INFO_get_data_svk
index 1d2d22ffb..149e30222 100644
--- a/Functions/VCS_Info/Backends/VCS_INFO_get_data_svk
+++ b/Functions/VCS_Info/Backends/VCS_INFO_get_data_svk
@@ -8,13 +8,7 @@ local -A hook_com
 
 svkbase=${vcs_comm[basedir]}
 rrn=${svkbase:t}
-zstyle -s ":vcs_info:${vcs}:${usercontext}:${rrn}" branchformat svkbranch || svkbranch="%b:%r"
-hook_com=( branch "${vcs_comm[branch]}" revision "${vcs_comm[revision]}" )
-if VCS_INFO_hook 'set-branch-format' "${svkbranch}"; then
-    zformat -f svkbranch "${svkbranch}" "b:${hook_com[branch]}" "r:${hook_com[revision]}"
-else
-    svkbranch=${hook_com[branch-replace]}
-fi
-hook_com=()
+VCS_INFO_set-branch-format "${vcs_comm[branch]}" "${vcs_comm[revision]}" &&
+    svkbranch="${REPLY}"
 VCS_INFO_formats '' "${svkbranch}" "${svkbase}" '' '' "${vcs_comm[revision]}" ''
 return 0
diff --git a/Functions/VCS_Info/Backends/VCS_INFO_get_data_svn b/Functions/VCS_Info/Backends/VCS_INFO_get_data_svn
index 21590addd..6fbd673a7 100644
--- a/Functions/VCS_Info/Backends/VCS_INFO_get_data_svn
+++ b/Functions/VCS_Info/Backends/VCS_INFO_get_data_svn
@@ -60,13 +60,7 @@ else
 fi
 
 rrn=${svnbase:t}
-zstyle -s ":vcs_info:${vcs}:${usercontext}:${rrn}" branchformat svnbranch || svnbranch="%b:%r"
-hook_com=( branch "${svninfo[URL]##*/}" revision "${cwdinfo[Revision]}" )
-if VCS_INFO_hook 'set-branch-format' "${svnbranch}"; then
-    zformat -f svnbranch "${svnbranch}" "b:${hook_com[branch]}" "r:${hook_com[revision]}"
-else
-    svnbranch=${hook_com[branch-replace]}
-fi
-hook_com=()
+VCS_INFO_set-branch-format "${svninfo[URL]##*/}" "${cwdinfo[Revision]}" &&
+    svnbranch="${REPLY}"
 VCS_INFO_formats '' "${svnbranch}" "${svnbase}" '' '' "${cwdinfo[Revision]}" ''
 return 0
diff --git a/Functions/VCS_Info/VCS_INFO_set-branch-format b/Functions/VCS_Info/VCS_INFO_set-branch-format
new file mode 100644
index 000000000..8cff51b9a
--- /dev/null
+++ b/Functions/VCS_Info/VCS_INFO_set-branch-format
@@ -0,0 +1,22 @@
+# A function for calling the branch-format hook
+#
+# Return the value to use in REPLY
+#
+# Parameters:
+readonly branch=$1
+readonly revision=$2
+#
+
+[[ -n $rrn ]] || return 1
+local -A hook_com
+local branchformat
+
+zstyle -s ":vcs_info:${vcs}:${usercontext}:${rrn}" branchformat branchformat || branchformat="%b:%r"
+hook_com=( branch "${branch}" revision "${revision}" )
+if VCS_INFO_hook 'set-branch-format' "${branchformat}"; then
+    zformat -f REPLY "${branchformat}" "b:${hook_com[branch]}" "r:${hook_com[revision]}"
+else
+    REPLY=${hook_com[branch-replace]}
+fi
+hook_com=()
+return 0
diff --git a/Functions/VCS_Info/vcs_info b/Functions/VCS_Info/vcs_info
index 9f48bee75..786b61918 100644
--- a/Functions/VCS_Info/vcs_info
+++ b/Functions/VCS_Info/vcs_info
@@ -22,6 +22,7 @@ static_functions=(
     VCS_INFO_hexdump
     VCS_INFO_hook
     VCS_INFO_set-patch-format
+    VCS_INFO_set-branch-format
     VCS_INFO_maxexports
     VCS_INFO_nvcsformats
     VCS_INFO_patch2subject