From 764a931dca59999138753d2b2830dc2fbaeb9ecb Mon Sep 17 00:00:00 2001
From: David Norton <david@platformers.dev>
Date: Wed, 13 May 2026 17:45:26 -0500
Subject: [PATCH 1/2] wip

---
 cmd/exec.go      | 24 ++++++++++++++++++------
 cmd/exec_test.go |  7 ++++++-
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/cmd/exec.go b/cmd/exec.go
index 520fd42..51cb229 100644
--- a/cmd/exec.go
+++ b/cmd/exec.go
@@ -27,13 +27,19 @@ func stderrIsTerminal() bool {
 	return term.IsTerminal(int(os.Stderr.Fd()))
 }
 
-const progressBarWidth = 30
-
 var partialBlocks = []string{" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"}
 
 const lerpFactor = 0.15
 const lerpSnap = 0.05
 
+func terminalWidth() int {
+	w, _, err := term.GetSize(int(os.Stderr.Fd()))
+	if err != nil || w <= 0 {
+		return 80
+	}
+	return w
+}
+
 func lerp(display, target float64) float64 {
 	display += (target - display) * lerpFactor
 	if math.Abs(target-display) < lerpSnap {
@@ -47,11 +53,17 @@ func renderProgressBar(displayStarted, displayCompleted float64, total int) stri
 		return ""
 	}
 
-	cEighths := int(displayCompleted * float64(progressBarWidth) * 8 / float64(total))
-	sEighths := int(displayStarted * float64(progressBarWidth) * 8 / float64(total))
+	suffix := fmt.Sprintf(" %d/%d complete", int(displayCompleted), total)
+	barWidth := terminalWidth() - 1 - len(suffix)
+	if barWidth < 10 {
+		barWidth = 10
+	}
+
+	cEighths := int(displayCompleted * float64(barWidth) * 8 / float64(total))
+	sEighths := int(displayStarted * float64(barWidth) * 8 / float64(total))
 
 	var bar strings.Builder
-	for i := 0; i < progressBarWidth; i++ {
+	for i := 0; i < barWidth; i++ {
 		left := i * 8
 		right := (i + 1) * 8
 
@@ -70,7 +82,7 @@ func renderProgressBar(displayStarted, displayCompleted float64, total int) stri
 	}
 	bar.WriteString(colorReset)
 
-	return fmt.Sprintf("\r\033[K %s %d/%d complete", bar.String(), int(displayCompleted), total)
+	return fmt.Sprintf("\r\033[K %s%s", bar.String(), suffix)
 }
 
 func clearProgress() {
diff --git a/cmd/exec_test.go b/cmd/exec_test.go
index 5f853bd..13f883e 100644
--- a/cmd/exec_test.go
+++ b/cmd/exec_test.go
@@ -308,7 +308,12 @@ func TestRenderProgressBar(t *testing.T) {
 
 func TestRenderProgressBarWidth(t *testing.T) {
 	result := renderProgressBar(30, 30, 30)
-	assert.Equal(t, strings.Count(result, "█"), progressBarWidth, "fully completed bar should have exactly progressBarWidth full blocks")
+	suffix := fmt.Sprintf(" %d/%d complete", 30, 30)
+	expectedBarWidth := terminalWidth() - 1 - len(suffix)
+	if expectedBarWidth < 10 {
+		expectedBarWidth = 10
+	}
+	assert.Equal(t, expectedBarWidth, strings.Count(result, "█"), "fully completed bar should fill the terminal width")
 	assert.NotContains(t, result, "░")
 }
 

From 2497799d14aff12a0c1f5aa051f39b3000a220ec Mon Sep 17 00:00:00 2001
From: David Norton <david@platformers.dev>
Date: Wed, 13 May 2026 17:58:35 -0500
Subject: [PATCH 2/2] wip

---
 cmd/exec.go | 31 +++++++++++++++++++++++++------
 1 file changed, 25 insertions(+), 6 deletions(-)

diff --git a/cmd/exec.go b/cmd/exec.go
index 51cb229..7013002 100644
--- a/cmd/exec.go
+++ b/cmd/exec.go
@@ -63,26 +63,45 @@ func renderProgressBar(displayStarted, displayCompleted float64, total int) stri
 	sEighths := int(displayStarted * float64(barWidth) * 8 / float64(total))
 
 	var bar strings.Builder
+	currentColor := ""
+	setColor := func(c string) {
+		if c != currentColor {
+			bar.WriteString(c)
+			currentColor = c
+		}
+	}
+
 	for i := 0; i < barWidth; i++ {
 		left := i * 8
 		right := (i + 1) * 8
 
 		switch {
 		case right <= cEighths:
-			bar.WriteString(colorWhite + "█")
+			setColor(colorWhite)
+			bar.WriteString("█")
 		case left >= sEighths:
-			bar.WriteString(colorGray + "░")
+			setColor(colorGray)
+			bar.WriteString("░")
 		case left >= cEighths && right <= sEighths:
-			bar.WriteString(colorGray + "█")
+			setColor(colorGray)
+			bar.WriteString("█")
 		case left < cEighths:
-			bar.WriteString(colorWhite + partialBlocks[cEighths-left])
+			setColor(colorWhite)
+			bar.WriteString(partialBlocks[cEighths-left])
 		default:
-			bar.WriteString(colorGray + partialBlocks[sEighths-left])
+			setColor(colorGray)
+			bar.WriteString(partialBlocks[sEighths-left])
 		}
 	}
 	bar.WriteString(colorReset)
 
-	return fmt.Sprintf("\r\033[K %s%s", bar.String(), suffix)
+	line := fmt.Sprintf(" %s%s", bar.String(), suffix)
+	// Pad to terminal width so \r overwrites the previous line without an erase sequence.
+	visibleLen := 1 + barWidth + len(suffix)
+	if pad := terminalWidth() - visibleLen; pad > 0 {
+		line += strings.Repeat(" ", pad)
+	}
+	return "\r" + line
 }
 
 func clearProgress() {