[PATCH v4 4/8] completion: new function __git_complete_log_opts

[Britton Leo Kerin <britton.kerin@gmail.com>]

The options accepted by git-log are also accepted by at least one other
command (git-bisect).  Prepare to factor out the common option and
option argument completion code by defining a new function.

Signed-off-by: Britton Leo Kerin <britton.kerin@gmail.com>
---
 contrib/completion/git-completion.bash | 101 +++++++++++++++++++++++++
 1 file changed, 101 insertions(+)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 2ed600244a..dfd504c37e 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2089,6 +2089,107 @@ __git_diff_merges_opts="off none on first-parent 1 separate m combined c dense-c
 __git_log_pretty_formats="oneline short medium full fuller reference email raw format: tformat: mboxrd"
 __git_log_date_formats="relative iso8601 iso8601-strict rfc2822 short local default human raw unix auto: format:"
 
+# Complete porcelain (i.e. not git-rev-list) options and at least some
+# option arguments accepted by git-log.  Note that this same set of options
+# are also accepted by some other git commands besides git-log.
+__git_complete_log_opts ()
+{
+        COMPREPLY=""
+
+	local merge=""
+	if [ -f "$__git_repo_path/MERGE_HEAD" ]; then
+		merge="--merge"
+	fi
+	case "$prev,$cur" in
+	-L,:*:*)
+		return	# fall back to Bash filename completion
+		;;
+	-L,:*)
+		__git_complete_symbol --cur="${cur#:}" --sfx=":"
+		return
+		;;
+	-G,*|-S,*)
+		__git_complete_symbol
+		return
+		;;
+	esac
+	case "$cur" in
+	--pretty=*|--format=*)
+		__gitcomp "$__git_log_pretty_formats $(__git_pretty_aliases)
+			" "" "${cur#*=}"
+		return
+		;;
+	--date=*)
+		__gitcomp "$__git_log_date_formats" "" "${cur##--date=}"
+		return
+		;;
+	--decorate=*)
+		__gitcomp "full short no" "" "${cur##--decorate=}"
+		return
+		;;
+	--diff-algorithm=*)
+		__gitcomp "$__git_diff_algorithms" "" "${cur##--diff-algorithm=}"
+		return
+		;;
+	--submodule=*)
+		__gitcomp "$__git_diff_submodule_formats" "" "${cur##--submodule=}"
+		return
+		;;
+	--ws-error-highlight=*)
+		__gitcomp "$__git_ws_error_highlight_opts" "" "${cur##--ws-error-highlight=}"
+		return
+		;;
+	--no-walk=*)
+		__gitcomp "sorted unsorted" "" "${cur##--no-walk=}"
+		return
+		;;
+	--diff-merges=*)
+                __gitcomp "$__git_diff_merges_opts" "" "${cur##--diff-merges=}"
+                return
+                ;;
+	--*)
+		__gitcomp "
+			$__git_log_common_options
+			$__git_log_shortlog_options
+			$__git_log_gitk_options
+			$__git_log_show_options
+			--root --topo-order --date-order --reverse
+			--follow --full-diff
+			--abbrev-commit --no-abbrev-commit --abbrev=
+			--relative-date --date=
+			--pretty= --format= --oneline
+			--show-signature
+			--cherry-mark
+			--cherry-pick
+			--graph
+			--decorate --decorate= --no-decorate
+			--walk-reflogs
+			--no-walk --no-walk= --do-walk
+			--parents --children
+			--expand-tabs --expand-tabs= --no-expand-tabs
+			$merge
+			$__git_diff_common_options
+			"
+		return
+		;;
+	-L:*:*)
+		return	# fall back to Bash filename completion
+		;;
+	-L:*)
+		__git_complete_symbol --cur="${cur#-L:}" --sfx=":"
+		return
+		;;
+	-G*)
+		__git_complete_symbol --pfx="-G" --cur="${cur#-G}"
+		return
+		;;
+	-S*)
+		__git_complete_symbol --pfx="-S" --cur="${cur#-S}"
+		return
+		;;
+	esac
+}
+
 _git_log ()
 {
 	__git_has_doubledash && return
-- 
2.43.0