Re: [PATCH 2/2] difftool: don't assume that default sh is sane
On Tue, Jul 29, 2014 at 12:53:29AM -0700, David Aguilar wrote:
> On Sat, Jul 19, 2014 at 05:35:17PM +0100, Charles Bailey wrote:
> > diff --git a/git-difftool.perl b/git-difftool.perl
> > index 18ca61e..598fcc2 100755
> > --- a/git-difftool.perl
> > +++ b/git-difftool.perl
> > @@ -47,13 +47,9 @@ sub find_worktree
> >
> > sub print_tool_help
> > {
> > - my $cmd = 'TOOL_MODE=diff';
> > - $cmd .= ' && . "$(git --exec-path)/git-mergetool--lib"';
> > - $cmd .= ' && show_tool_help';
> > -
> > # See the comment at the bottom of file_diff() for the reason behind
> > # using system() followed by exit() instead of exec().
> > - my $rc = system('sh', '-c', $cmd);
> > + my $rc = system(qw(git mergetool --tool-help=diff));
>
> I believe qw() in list context is considered deprecated.
Sorry for the noise, I got my warnings mixed up.
It's only deprecated when used as parentheses, so this is fine as-is.
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David
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Re: [PATCH 2/2] difftool: don't assume that default sh is sane
On Sat, Jul 19, 2014 at 05:35:17PM +0100, Charles Bailey wrote:
> From: Charles Bailey
>
> git-difftool used to create a command list script containing $( ... )
> and explicitly call "sh -c" with this list.
>
> Instead, allow mergetool --tool-help to take a mode parameter and call
> mergetool directly to invoke the show_tool_help function. This mode
> parameter is intented for use solely by difftool.
>
> Signed-off-by: Charles Bailey
> ---
> Another issue for Solaris. Originally I had a fix for this that
> substituted "@SHELL_PATH@" even inside perl scripts but I felt that
> having an interface for show_tool_help was a little neater all round but
> I welcome alternative views.
I definitely agree that having an interface is nice and tidy.
> git-difftool.perl | 6 +-
> git-mergetool.sh | 12 +++-
> 2 files changed, 12 insertions(+), 6 deletions(-)
>
> diff --git a/git-difftool.perl b/git-difftool.perl
> index 18ca61e..598fcc2 100755
> --- a/git-difftool.perl
> +++ b/git-difftool.perl
> @@ -47,13 +47,9 @@ sub find_worktree
>
> sub print_tool_help
> {
> - my $cmd = 'TOOL_MODE=diff';
> - $cmd .= ' && . "$(git --exec-path)/git-mergetool--lib"';
> - $cmd .= ' && show_tool_help';
> -
> # See the comment at the bottom of file_diff() for the reason behind
> # using system() followed by exit() instead of exec().
> - my $rc = system('sh', '-c', $cmd);
> + my $rc = system(qw(git mergetool --tool-help=diff));
I believe qw() in list context is considered deprecated.
cheers,
--
David
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Re: [PATCH 2/2] difftool: don't assume that default sh is sane
On Sat, Jul 19, 2014 at 06:21:32PM +0100, John Keeping wrote:
>
> What's the reason for forcing `--tool-help` to be the last option?
> Wouldn't it be simpler to just change the top-level case statement to:
>
> --tool-help=*)
> TOOL_MODE=${1#--tool-help=}
> show_tool_help
> ;;
> --tool-help)
> show_tool_help
> ;;
It doesn't make sense to use --tool-help with other parameters so issuing
an error made sense to me at the time. You've pointed out to me that I
don't error when those other options come first so I'm now unsure how
valuable this behaviour is, now. (I can't immediately see a really neat way
to give a diagnostic if other options do come first.)
Your version is good, obviously simpler.
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Re: [PATCH 2/2] difftool: don't assume that default sh is sane
On Sat, Jul 19, 2014 at 05:35:17PM +0100, Charles Bailey wrote:
> From: Charles Bailey
>
> git-difftool used to create a command list script containing $( ... )
> and explicitly call "sh -c" with this list.
>
> Instead, allow mergetool --tool-help to take a mode parameter and call
> mergetool directly to invoke the show_tool_help function. This mode
> parameter is intented for use solely by difftool.
>
> Signed-off-by: Charles Bailey
> ---
> Another issue for Solaris. Originally I had a fix for this that
> substituted "@SHELL_PATH@" even inside perl scripts but I felt that
> having an interface for show_tool_help was a little neater all round but
> I welcome alternative views.
>
> git-difftool.perl | 6 +-
> git-mergetool.sh | 12 +++-
> 2 files changed, 12 insertions(+), 6 deletions(-)
>
> diff --git a/git-difftool.perl b/git-difftool.perl
> index 18ca61e..598fcc2 100755
> --- a/git-difftool.perl
> +++ b/git-difftool.perl
> @@ -47,13 +47,9 @@ sub find_worktree
>
> sub print_tool_help
> {
> - my $cmd = 'TOOL_MODE=diff';
> - $cmd .= ' && . "$(git --exec-path)/git-mergetool--lib"';
> - $cmd .= ' && show_tool_help';
> -
> # See the comment at the bottom of file_diff() for the reason behind
> # using system() followed by exit() instead of exec().
> - my $rc = system('sh', '-c', $cmd);
> + my $rc = system(qw(git mergetool --tool-help=diff));
> exit($rc | ($rc >> 8));
> }
>
> diff --git a/git-mergetool.sh b/git-mergetool.sh
> index e969dd0..d32b663 100755
> --- a/git-mergetool.sh
> +++ b/git-mergetool.sh
> @@ -320,7 +320,17 @@ guessed_merge_tool=false
> while test $# != 0
> do
> case "$1" in
> - --tool-help)
> + --tool-help*)
> + case "$#,$1" in
> + 1,*=*)
What's the reason for forcing `--tool-help` to be the last option?
Wouldn't it be simpler to just change the top-level case statement to:
--tool-help=*)
TOOL_MODE=${1#--tool-help=}
show_tool_help
;;
--tool-help)
show_tool_help
;;
> + TOOL_MODE=$(expr "z$1" : 'z-[^=]*=\(.*\)')
> + ;;
> + 1,--tool-help)
> + ;;
> + *)
> + usage
> + ;;
> + esac
> show_tool_help
> ;;
> -t|--tool*)
> --
> 2.0.2.611.g8c85416
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[PATCH 2/2] difftool: don't assume that default sh is sane
From: Charles Bailey
git-difftool used to create a command list script containing $( ... )
and explicitly call "sh -c" with this list.
Instead, allow mergetool --tool-help to take a mode parameter and call
mergetool directly to invoke the show_tool_help function. This mode
parameter is intented for use solely by difftool.
Signed-off-by: Charles Bailey
---
Another issue for Solaris. Originally I had a fix for this that
substituted "@SHELL_PATH@" even inside perl scripts but I felt that
having an interface for show_tool_help was a little neater all round but
I welcome alternative views.
git-difftool.perl | 6 +-
git-mergetool.sh | 12 +++-
2 files changed, 12 insertions(+), 6 deletions(-)
diff --git a/git-difftool.perl b/git-difftool.perl
index 18ca61e..598fcc2 100755
--- a/git-difftool.perl
+++ b/git-difftool.perl
@@ -47,13 +47,9 @@ sub find_worktree
sub print_tool_help
{
- my $cmd = 'TOOL_MODE=diff';
- $cmd .= ' && . "$(git --exec-path)/git-mergetool--lib"';
- $cmd .= ' && show_tool_help';
-
# See the comment at the bottom of file_diff() for the reason behind
# using system() followed by exit() instead of exec().
- my $rc = system('sh', '-c', $cmd);
+ my $rc = system(qw(git mergetool --tool-help=diff));
exit($rc | ($rc >> 8));
}
diff --git a/git-mergetool.sh b/git-mergetool.sh
index e969dd0..d32b663 100755
--- a/git-mergetool.sh
+++ b/git-mergetool.sh
@@ -320,7 +320,17 @@ guessed_merge_tool=false
while test $# != 0
do
case "$1" in
- --tool-help)
+ --tool-help*)
+ case "$#,$1" in
+ 1,*=*)
+ TOOL_MODE=$(expr "z$1" : 'z-[^=]*=\(.*\)')
+ ;;
+ 1,--tool-help)
+ ;;
+ *)
+ usage
+ ;;
+ esac
show_tool_help
;;
-t|--tool*)
--
2.0.2.611.g8c85416
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