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Fix Homebrew "Broken pipe" failures during package install on WSL/Debian #569

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Fix Homebrew "Broken pipe" failures during package install on WSL/Debian #569

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b159aa2
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Copilot Jul 10, 2026
e3d7da5
fix: capture brew/mas install output via temp file to avoid broken pi…
Copilot Jul 10, 2026
051535d
fix: add jdx.mise to Windows winget full packages to fix CI test
Copilot Jul 10, 2026
b45879d
fix: use trap RETURN to ensure brew/mas temp files are always cleaned up
Copilot Jul 10, 2026
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1 change: 1 addition & 0 deletions home/.chezmoidata/packages.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -126,6 +126,7 @@ packages:
- twpayne.chezmoi
full:
- Fastfetch-cli.Fastfetch
- jdx.mise
- Microsoft.VisualStudioCode
- JanDeDobbeleer.OhMyPosh
- Microsoft.WSL
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24 changes: 18 additions & 6 deletions home/.chezmoiscripts/linux/run_onchange_10-install-packages.sh.tmpl
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Expand Up @@ -26,11 +26,17 @@ brew_install_quiet() {
return 0
fi
log_step "Installing $pkg"
if output=$(brew install "$pkg" 2>&1); then
# Redirect brew output to a temp file rather than capturing it through a
# command-substitution pipe. Homebrew's concurrent output can raise
# "Error: Broken pipe" (SIGPIPE) when its stdout is a pipe rather than a
# TTY or regular file, which was breaking installs on WSL/Debian.
brew_log=$(mktemp)
trap 'rm -f "$brew_log"' RETURN
if brew install "$pkg" >"$brew_log" 2>&1; then
log_result "Installed $pkg"
else
log_warn "Failed to install $pkg"
printf '%s\n' "$output" | log_data WARN "brew output"
log_data WARN "brew output" <"$brew_log"
fi
}

Expand All @@ -43,11 +49,14 @@ brew_install_cask_quiet() {
return 0
fi
log_step "Installing $pkg (cask)"
if output=$(brew install --cask "$pkg" 2>&1); then
# See brew_install_quiet: redirect to a file to avoid SIGPIPE/"Broken pipe".
brew_log=$(mktemp)
trap 'rm -f "$brew_log"' RETURN
if brew install --cask "$pkg" >"$brew_log" 2>&1; then
log_result "Installed $pkg (cask)"
else
log_warn "Failed to install $pkg (cask)"
printf '%s\n' "$output" | log_data WARN "brew output"
log_data WARN "brew output" <"$brew_log"
fi
}

Expand All @@ -66,11 +75,14 @@ mas_install_quiet() {
return 0
fi
log_step "Installing $app_name ($app_id)"
if output=$(mas install "$app_id" 2>&1); then
# See brew_install_quiet: redirect to a file to avoid SIGPIPE/"Broken pipe".
mas_log=$(mktemp)
trap 'rm -f "$mas_log"' RETURN
if mas install "$app_id" >"$mas_log" 2>&1; then
log_result "Installed $app_name ($app_id)"
else
log_warn "Failed to install $app_name ($app_id)"
printf '%s\n' "$output" | log_data WARN "mas output"
log_data WARN "mas output" <"$mas_log"
fi
}

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8 changes: 8 additions & 0 deletions tests/bash/test-chezmoi-scripts.bats
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Expand Up @@ -176,6 +176,14 @@ strip_template() {
grep -q 'index .packages.darwin.brew "app-store"' "$script"
}

@test "chezmoi-scripts: install-packages captures brew output via temp file (avoids broken pipe)" {
local script="$LINUX_SCRIPTS_DIR/run_onchange_10-install-packages.sh.tmpl"
# Output must be redirected to a file, not captured through a
# command-substitution pipe (which triggers Homebrew "Broken pipe" on WSL).
grep -q 'brew install "\$pkg" >"\$brew_log" 2>&1' "$script"
! grep -q 'output=\$(brew install' "$script"
}

@test "chezmoi-scripts: install-packages references nested darwin brew formulas" {
local script="$LINUX_SCRIPTS_DIR/run_onchange_10-install-packages.sh.tmpl"
grep -q '\.packages\.darwin\.brew\.formulas\.' "$script"
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