Add a style that shows a commit relative to a tag/branch

Add a new style in the git plugin to get a commit name based on the closest branch/tag

plugins/git/functions/git-info

@@ -145,6 +145,10 @@ function git-info {
   local deleted=0
   local deleted_format
   local deleted_formatted
+  local describe
+  local describe_cmd
+  local describe_format
+  local describe_formatted
   local dirty=0
   local dirty_format
   local dirty_formatted
@@ -213,6 +217,9 @@ function git-info {
   # Gets the commit difference counts between local and remote.
   ahead_and_behind_cmd='git rev-list --count --left-right HEAD...@{upstream}'
 
+  # Use describe for approximative branch naming
+  describe_cmd='git describe --contains --all HEAD'
+
   # Ignore submodule status.
   zstyle -b \
     ':omz:plugin:git:prompt:ignore' submodule 'ignore_submodule'
@@ -286,6 +293,13 @@ function git-info {
         zformat -f behind_formatted "$behind_format" "B:$behind"
       fi
     fi
+  else
+    # Format describe.
+    describe=$(${(z)describe_cmd} 2>/dev/null)
+    if [[ -n "$describe" ]]; then
+      zstyle -s ':omz:plugin:git:prompt' describe 'describe_format'
+      zformat -f describe_formatted "$describe_format" "i:$describe"
+    fi
   fi
 
   # Format added.
@@ -349,6 +363,7 @@ function git-info {
       "c:$commit_formatted" \
       "d:$deleted_formatted" \
       "D:$dirty_formatted" \
+      "i:$describe_formatted" \
       "m:$modified_formatted" \
       "R:$remote_formatted" \
       "r:$renamed_formatted" \

plugins/git/style.zsh

@@ -29,6 +29,9 @@ zstyle ':omz:plugin:git:prompt' deleted 'deleted:%d'
 # %D - Indicator to notify of dirty files.
 zstyle ':omz:plugin:git:prompt' dirty 'dirty:%D'
 
+# %i - Closest branch/tag to the commit
+zstyle ':omz:plugin:git:prompt' describe '(%i)'
+
 # %m - Indicator to notify of modified files.
 zstyle ':omz:plugin:git:prompt' modified 'modified:%m'