[PATCH 2/2] _git: When completing worktrees, show the ref and hash of each worktree.

[Daniel Shahaf <d.s@daniel.shahaf.name>]

---
This part is independently useful.

The hash is truncated to 9 nibbles; should that be changed?

Mikael, interesting idea.  I think I'll try this:

    _git-cd() {
      (( ${+functions[_git]} )) || { autoload +X -U _git && _git }
      __git_worktrees "$@" || ${_comps[cd]} "$@"
    }
    git() {
      if [[ $1 == cd ]]; then
        shift ; builtin cd "$@" ; return $?
      fi
      ⋮
    }

Cheers,

Daniel

 Completion/Unix/Command/_git | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/Completion/Unix/Command/_git b/Completion/Unix/Command/_git
index b2f93ff0f..32e5566e9 100644
--- a/Completion/Unix/Command/_git
+++ b/Completion/Unix/Command/_git
@@ -7561,8 +7561,25 @@ __git_browsers () {
 }
 
 __git_worktrees () {
-  _wanted directories expl 'working tree' compadd -S ' ' -f -M 'r:|/=* r:|=*' \
-    ${${(M)${(f)"$(_call_program directories git worktree list --porcelain)"}:#worktree*}#* }
+  local -a records=( ${(ps.\n\n.)"$(_call_program directories git worktree list --porcelain)"} )
+  local -a directories descriptions
+  local i hash branch
+  for i in $records; do
+    directories+=( ${${i%%$'\n'*}#worktree } )
+    hash=${${${"${(f)i}"[2]}#HEAD }[1,9]}
+    branch=${${"${(f)i}"[3]}#branch refs/heads/}
+
+    # Simulate the non-porcelain output
+    if [[ $branch == detached ]]; then
+      # TODO: show a ref that points at $hash here, like vcs_info does?
+      branch="(detached HEAD)"
+    else
+      branch="[$branch]"
+    fi
+
+    descriptions+=( "${directories[-1]}"$'\t'"$hash $branch" )
+  done
+  _wanted directories expl 'working tree' compadd -ld descriptions -S ' ' -f -M 'r:|/=* r:|=*' -a directories
 }
 
 (( $+functions[__git_difftools] )) ||