git-gui: convert git_read*, git_write to be non-variadic

We are going to treat command arguments and redirections differently to
avoid passing arguments that look like redirections to the command
accidentally. To do so, it will be necessary to know which arguments
are intentional redirections. As a preparation, convert git_read,
git_read_nice, and git_write to take just a single argument that is
the command in a list. Adjust all call sites accordingly.

In the future, this argument will be the regular command arguments and
a second argument will be the redirection operations.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>

Signed-off-by: Taylor Blau <me@ttaylorr.com>

Author: j6t

git-gui.sh

@@ -621,7 +621,7 @@ proc _lappend_nice {cmd_var} {
 }
 
 proc git {args} {
-	set fd [eval [list git_read] $args]
+	set fd [git_read $args]
 	fconfigure $fd -translation binary -encoding utf-8
 	set result [string trimright [read $fd] "\n"]
 	close $fd
@@ -642,34 +642,34 @@ proc _open_stdout_stderr {cmd} {
 	return $fd
 }
 
-proc git_read {args} {
-	set cmdp [_git_cmd [lindex $args 0]]
-	set args [lrange $args 1 end]
+proc git_read {cmd} {
+	set cmdp [_git_cmd [lindex $cmd 0]]
+	set cmd [lrange $cmd 1 end]
 
-	return [_open_stdout_stderr [concat $cmdp $args]]
+	return [_open_stdout_stderr [concat $cmdp $cmd]]
 }
 
-proc git_read_nice {args} {
+proc git_read_nice {cmd} {
 	set opt [list]
 
 	_lappend_nice opt
 
-	set cmdp [_git_cmd [lindex $args 0]]
-	set args [lrange $args 1 end]
+	set cmdp [_git_cmd [lindex $cmd 0]]
+	set cmd [lrange $cmd 1 end]
 
-	return [_open_stdout_stderr [concat $opt $cmdp $args]]
+	return [_open_stdout_stderr [concat $opt $cmdp $cmd]]
 }
 
-proc git_write {args} {
-	set cmdp [_git_cmd [lindex $args 0]]
-	set args [lrange $args 1 end]
+proc git_write {cmd} {
+	set cmdp [_git_cmd [lindex $cmd 0]]
+	set cmd [lrange $cmd 1 end]
 
-	_trace_exec [concat $cmdp $args]
-	return [open [concat [list | ] $cmdp $args] w]
+	_trace_exec [concat $cmdp $cmd]
+	return [open [concat [list | ] $cmdp $cmd] w]
 }
 
 proc githook_read {hook_name args} {
-	git_read hook run --ignore-missing $hook_name -- $args 2>@1
+	git_read [concat [list hook run --ignore-missing $hook_name --] $args 2>@1]
 }
 
 proc kill_file_process {fd} {
@@ -1110,10 +1110,10 @@ proc _parse_config {arr_name args} {
 	array unset arr
 	set buf {}
 	catch {
-		set fd_rc [eval \
-			[list git_read config] \
+		set fd_rc [git_read \
+			[concat config \
 			$args \
-			[list --null --list]]
+			--null --list]]
 		fconfigure $fd_rc -translation binary -encoding utf-8
 		set buf [read $fd_rc]
 		close $fd_rc
@@ -1482,12 +1482,12 @@ proc rescan {after {honor_trustmtime 1}} {
 	} else {
 		set rescan_active 1
 		ui_status [mc "Refreshing file status..."]
-		set fd_rf [git_read update-index \
+		set fd_rf [git_read [list update-index \
 			-q \
 			--unmerged \
 			--ignore-missing \
 			--refresh \
-			]
+			]]
 		fconfigure $fd_rf -blocking 0 -translation binary
 		fileevent $fd_rf readable \
 			[list rescan_stage2 $fd_rf $after]
@@ -1527,11 +1527,11 @@ proc rescan_stage2 {fd after} {
 	set rescan_active 2
 	ui_status [mc "Scanning for modified files ..."]
 	if {[git-version >= "1.7.2"]} {
-		set fd_di [git_read diff-index --cached --ignore-submodules=dirty -z [PARENT]]
+		set fd_di [git_read [list diff-index --cached --ignore-submodules=dirty -z [PARENT]]]
 	} else {
-		set fd_di [git_read diff-index --cached -z [PARENT]]
+		set fd_di [git_read [list diff-index --cached -z [PARENT]]]
 	}
-	set fd_df [git_read diff-files -z]
+	set fd_df [git_read [list diff-files -z]]
 
 	fconfigure $fd_di -blocking 0 -translation binary -encoding binary
 	fconfigure $fd_df -blocking 0 -translation binary -encoding binary
@@ -1540,7 +1540,7 @@ proc rescan_stage2 {fd after} {
 	fileevent $fd_df readable [list read_diff_files $fd_df $after]
 
 	if {[is_config_true gui.displayuntracked]} {
-		set fd_lo [eval git_read ls-files --others -z $ls_others]
+		set fd_lo [git_read [concat ls-files --others -z $ls_others]]
 		fconfigure $fd_lo -blocking 0 -translation binary -encoding binary
 		fileevent $fd_lo readable [list read_ls_others $fd_lo $after]
 		incr rescan_active

lib/blame.tcl

@@ -486,9 +486,9 @@ method _load {jump} {
 		fconfigure $fd -eofchar {}
 	} else {
 		if {$do_textconv ne 0} {
-			set fd [git_read cat-file --textconv "$commit:$path"]
+			set fd [git_read [list cat-file --textconv "$commit:$path"]]
 		} else {
-			set fd [git_read cat-file blob "$commit:$path"]
+			set fd [git_read [list cat-file blob "$commit:$path"]]
 		}
 	}
 	fconfigure $fd \
@@ -617,7 +617,7 @@ method _exec_blame {cur_w cur_d options cur_s} {
 	}
 
 	lappend options -- $path
-	set fd [eval git_read_nice blame $options]
+	set fd [git_read_nice [concat blame $options]]
 	fconfigure $fd -blocking 0 -translation lf -encoding utf-8
 	fileevent $fd readable [cb _read_blame $fd $cur_w $cur_d]
 	set current_fd $fd
@@ -986,7 +986,7 @@ method _showcommit {cur_w lno} {
 		if {[catch {set msg $header($cmit,message)}]} {
 			set msg {}
 			catch {
-				set fd [git_read cat-file commit $cmit]
+				set fd [git_read [list cat-file commit $cmit]]
 				fconfigure $fd -encoding binary -translation lf
 				# By default commits are assumed to be in utf-8
 				set enc utf-8
@@ -1134,7 +1134,7 @@ method _blameparent {} {
 		} else {
 			set diffcmd [list diff-tree --unified=0 $cparent $cmit -- $new_path]
 		}
-		if {[catch {set fd [eval git_read $diffcmd]} err]} {
+		if {[catch {set fd [git_read $diffcmd]} err]} {
 			$status_operation stop [mc "Unable to display parent"]
 			error_popup [strcat [mc "Error loading diff:"] "\n\n$err"]
 			return

lib/branch.tcl

@@ -7,7 +7,7 @@ proc load_all_heads {} {
 	set rh refs/heads
 	set rh_len [expr {[string length $rh] + 1}]
 	set all_heads [list]
-	set fd [git_read for-each-ref --format=%(refname) $rh]
+	set fd [git_read [list for-each-ref --format=%(refname) $rh]]
 	fconfigure $fd -translation binary -encoding utf-8
 	while {[gets $fd line] > 0} {
 		if {!$some_heads_tracking || ![is_tracking_branch $line]} {
@@ -21,10 +21,10 @@ proc load_all_heads {} {
 
 proc load_all_tags {} {
 	set all_tags [list]
-	set fd [git_read for-each-ref \
+	set fd [git_read [list for-each-ref \
 		--sort=-taggerdate \
 		--format=%(refname) \
-		refs/tags]
+		refs/tags]]
 	fconfigure $fd -translation binary -encoding utf-8
 	while {[gets $fd line] > 0} {
 		if {![regsub ^refs/tags/ $line {} name]} continue

lib/browser.tcl

@@ -196,7 +196,7 @@ method _ls {tree_id {name {}}} {
 	lappend browser_stack [list $tree_id $name]
 	$w conf -state disabled
 
-	set fd [git_read ls-tree -z $tree_id]
+	set fd [git_read [list ls-tree -z $tree_id]]
 	fconfigure $fd -blocking 0 -translation binary -encoding utf-8
 	fileevent $fd readable [cb _read $fd]
 }

lib/checkout_op.tcl

@@ -304,12 +304,12 @@ The rescan will be automatically started now.
 		_readtree $this
 	} else {
 		ui_status [mc "Refreshing file status..."]
-		set fd [git_read update-index \
+		set fd [git_read [list update-index \
 			-q \
 			--unmerged \
 			--ignore-missing \
 			--refresh \
-			]
+			]]
 		fconfigure $fd -blocking 0 -translation binary
 		fileevent $fd readable [cb _refresh_wait $fd]
 	}
@@ -345,15 +345,15 @@ method _readtree {} {
 		[mc "Updating working directory to '%s'..." [_name $this]] \
 		[mc "files checked out"]]
 
-	set fd [git_read read-tree \
+	set fd [git_read [list read-tree \
 		-m \
 		-u \
 		-v \
 		--exclude-per-directory=.gitignore \
 		$HEAD \
 		$new_hash \
 		2>@1 \
-		]
+		]]
 	fconfigure $fd -blocking 0 -translation binary
 	fileevent $fd readable [cb _readtree_wait $fd $status_bar_operation]
 }
@@ -573,7 +573,7 @@ method _confirm_reset {cur} {
 	pack $w.buttons.cancel -side right -padx 5
 	pack $w.buttons -side bottom -fill x -pady 10 -padx 10
 
-	set fd [git_read rev-list --pretty=oneline $cur ^$new_hash]
+	set fd [git_read [list rev-list --pretty=oneline $cur ^$new_hash]]
 	while {[gets $fd line] > 0} {
 		set abbr [string range $line 0 7]
 		set subj [string range $line 41 end]

lib/choose_repository.tcl

@@ -818,9 +818,9 @@ method _clone_refs {} {
 		error_popup [mc "Not a Git repository: %s" [file tail $origin_url]]
 		return 0
 	}
-	set fd_in [git_read for-each-ref \
+	set fd_in [git_read [list for-each-ref \
 		--tcl \
-		{--format=list %(refname) %(objectname) %(*objectname)}]
+		{--format=list %(refname) %(objectname) %(*objectname)}]]
 	cd $pwd
 
 	set fd [safe_open_file [gitdir packed-refs] w]
@@ -953,14 +953,14 @@ method _do_clone_checkout {HEAD} {
 		[mc "files"]]
 
 	set readtree_err {}
-	set fd [git_read read-tree \
+	set fd [git_read [list read-tree \
 		-m \
 		-u \
 		-v \
 		HEAD \
 		HEAD \
 		2>@1 \
-		]
+		]]
 	fconfigure $fd -blocking 0 -translation binary
 	fileevent $fd readable [cb _readtree_wait $fd]
 }

lib/choose_rev.tcl

@@ -146,14 +146,14 @@ constructor _new {path unmerged_only title} {
 	append fmt { %(*subject)}
 	append fmt {]}
 	set all_refn [list]
-	set fr_fd [git_read for-each-ref \
+	set fr_fd [git_read [list for-each-ref \
 		--tcl \
 		--sort=-taggerdate \
 		--format=$fmt \
 		refs/heads \
 		refs/remotes \
 		refs/tags \
-		]
+		]]
 	fconfigure $fr_fd -translation lf -encoding utf-8
 	while {[gets $fr_fd line] > 0} {
 		set line [eval $line]
@@ -176,7 +176,7 @@ constructor _new {path unmerged_only title} {
 	close $fr_fd
 
 	if {$unmerged_only} {
-		set fr_fd [git_read rev-list --all ^$::HEAD]
+		set fr_fd [git_read [list rev-list --all ^$::HEAD]]
 		while {[gets $fr_fd sha1] > 0} {
 			if {[catch {set rlst $cmt_refn($sha1)}]} continue
 			foreach refn $rlst {

lib/commit.tcl

@@ -27,7 +27,7 @@ You are currently in the middle of a merge that has not been fully completed.  Y
 	if {[catch {
 			set name ""
 			set email ""
-			set fd [git_read cat-file commit $curHEAD]
+			set fd [git_read [list cat-file commit $curHEAD]]
 			fconfigure $fd -encoding binary -translation lf
 			# By default commits are assumed to be in utf-8
 			set enc utf-8
@@ -325,7 +325,7 @@ proc commit_commitmsg_wait {fd_ph curHEAD msg_p} {
 
 proc commit_writetree {curHEAD msg_p} {
 	ui_status [mc "Committing changes..."]
-	set fd_wt [git_read write-tree]
+	set fd_wt [git_read [list write-tree]]
 	fileevent $fd_wt readable \
 		[list commit_committree $fd_wt $curHEAD $msg_p]
 }
@@ -350,7 +350,7 @@ proc commit_committree {fd_wt curHEAD msg_p} {
 	# -- Verify this wasn't an empty change.
 	#
 	if {$commit_type eq {normal}} {
-		set fd_ot [git_read cat-file commit $PARENT]
+		set fd_ot [git_read [list cat-file commit $PARENT]]
 		fconfigure $fd_ot -encoding binary -translation lf
 		set old_tree [gets $fd_ot]
 		close $fd_ot

lib/console.tcl

@@ -93,7 +93,7 @@ method _init {} {
 method exec {cmd {after {}}} {
 	lappend cmd 2>@1
 	if {[lindex $cmd 0] eq {git}} {
-		set fd_f [eval git_read [lrange $cmd 1 end]]
+		set fd_f [git_read [lrange $cmd 1 end]]
 	} else {
 		set fd_f [_open_stdout_stderr $cmd]
 	}

lib/database.tcl

@@ -3,7 +3,7 @@
 
 proc do_stats {} {
 	global use_ttk NS
-	set fd [git_read count-objects -v]
+	set fd [git_read [list count-objects -v]]
 	while {[gets $fd line] > 0} {
 		if {[regexp {^([^:]+): (\d+)$} $line _ name value]} {
 			set stats($name) $value