Re: [TopGit PATCH v2] tg-patch: use pretty_tree

> This applies the same treatment to tg-patch like tg-files got in v2.
> 
> Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
> 
> ---
> 
> Basing the decision whether to use the ui diff or the porcelain diff-tree
> is probably very unorthodox, but also makes sense, doesn't it?

> Changes:
>  v2:
>   * apply suggestions from Uwe made to tg-files here too
>   * the running pager decides whether we use the ui diff or the porcelain
>     diff-tree
> 
>  tg-patch.sh |   67 +++++++++++++++++++++++++++++++++-------------------------
>  1 files changed, 38 insertions(+), 29 deletions(-)
> 
> diff --git a/tg-patch.sh b/tg-patch.sh
> index 7bafdfe..e88985a 100644 tg-patch.sh
> --- a/tg-patch.sh
> +++ b/tg-patch.sh
> @@ -4,24 +4,18 @@
>  # GPLv2
>  
>  name=
> -
>  topic=
> -diff_opts=
> -diff_committed_only=yes	# will be unset for index/worktree
> -
> +topic_for_pretty_tree=
>  
>  ## Parse options
>  
>  while [ -n "$1" ]; do
>  	arg="$1"; shift
>  	case "$arg" in
> -	-i)
> -		topic='(i)'
> -		diff_opts="$diff_opts --cached";
> -		diff_committed_only=;;
> -	-w)
> -		topic='(w)'
> -		diff_committed_only=;;
> +	-i|-w)
> +		[ -z "$topic" ] || die "-i and -w are mutually exclusive"
> +		topic="(${arg#-})"
> +		topic_for_pretty_tree="$arg";;
>  	-*)
>  		echo "Usage: tg [...] patch [-i | -w] [NAME]" >&2
>  		exit 1;;
> @@ -32,8 +26,8 @@ while [ -n "$1" ]; do
>  done
>  
>  
> -[ -n "$name"  -a  -z "$diff_committed_only" ]  &&
> -	die "-i/-w are mutually exclusive with NAME"
> +[ -n "$name" -a -n "$topic" ] &&
> +	die "$topic are mutually exclusive with NAME"
>  
>  [ -n "$name" ] || name="$(git symbolic-ref HEAD | sed 's#^refs/\(heads\|top-bases\)/##')"
>  base_rev="$(git rev-parse --short --verify "refs/top-bases/$name" 2>/dev/null)" ||
> @@ -46,22 +40,37 @@ base_rev="$(git rev-parse --short --verify "refs/top-bases/$name" 2>/dev/null)"
>  
>  setup_pager
>  
> -cat_file "$topic:.topmsg"
> -echo
> -[ -n "$(git grep $diff_opts '^[-]--' ${diff_committed_only:+"$name"} -- ".topmsg")" ] || echo '---'
> -
> -# Evil obnoxious hack to work around the lack of git diff --exclude
> -git_is_stupid="$(mktemp -t tg-patch-changes.XXXXXX)"
> -git diff --name-only $diff_opts "$base_rev" ${diff_committed_only:+"$name"} -- |
> -	fgrep -vx ".topdeps" |
> -	fgrep -vx ".topmsg" >"$git_is_stupid" || : # fgrep likes to fail randomly?
> -if [ -s "$git_is_stupid" ]; then
> -	cd "$root_dir"
> -	cat "$git_is_stupid" | xargs git diff -a --patch-with-stat $diff_opts "$base_rev" ${diff_committed_only:+"$name"} --
> -else
> -	echo "No changes."
> -fi
> -rm "$git_is_stupid"
> +# put out the commit message
> +# and put an empty line out, if the last one in the message was not an empty line
> +# and put out "---" if the commit message does not have one yet
> +cat_file "$topic:.topmsg" |
> +	awk '
> +/^---/ {
> +    has_3dash=1;
> +}
> +       {
> +    need_empty = 1;
> +    if ($0 == "")
> +        need_empty = 0;
> +    print;
> +}
> +END    {
> +    if (need_empty)
> +        print "";
> +    if (!has_3dash)
> +        print "---";
> +}
> +'
> +
> +b_tree=$(pretty_tree "$name" -b)
> +t_tree=$(pretty_tree "$name" $topic_for_pretty_tree)
> +
> +# use the ui diff command when the pager is active
> +diff_command=diff
> +[ "x$GIT_PAGER_IN_USE" = "x1" ] ||
> +	diff_command=diff-tree
> +
> +git $diff_command -p --stat $b_tree $t_tree
>  
>  echo '-- '
>  echo "tg: ($base_rev..) $name (depends on: $(cat_file "$topic:.topdeps" | paste -s -d' '))"
> -- 
> tg: (aaf1181..) bw/tg-patch-pretty_tree (depends on: bw/files)
>