Fix truncated package metadata in additional packages preview (#3580)

archinstall/lib/models/packages.py

@@ -1,3 +1,5 @@
+import os
+import textwrap
 from dataclasses import dataclass, field
 from enum import Enum
 from functools import cached_property
@@ -134,13 +136,32 @@ class AvailablePackage(BaseModel):
 
 	# return all package info line by line
 	def info(self) -> str:
-		output = ''
-		for key, value in self.model_dump().items():
-			key = key.replace('_', ' ').capitalize()
-			key = key.ljust(self.longest_key)
-			output += f'{key} : {value}\n'
+		# Preview pane occupies roughly half the terminal width when shown
+		# alongside the option list. Wrap each value to fit so long fields
+		# (Description, Optional Deps, etc.) do not produce horizontal scroll.
+		try:
+			cols = os.get_terminal_size().columns
+		except OSError:
+			cols = 80
+		preview_width = max(40, cols // 2 - 5)
+		indent = ' ' * (self.longest_key + 3)
 
-		return output
+		lines: list[str] = []
+		for key, value in self.model_dump().items():
+			key_label = key.replace('_', ' ').capitalize().ljust(self.longest_key)
+			prefix = f'{key_label} : '
+			lines.append(
+				textwrap.fill(
+					str(value),
+					width=preview_width,
+					initial_indent=prefix,
+					subsequent_indent=indent,
+					break_long_words=False,
+					break_on_hyphens=False,
+				),
+			)
+
+		return '\n'.join(lines) + '\n'
 
 	@cached_property
 	def get_depends_on(self) -> list[str]:

archinstall/lib/packages/packages.py

@@ -9,6 +9,12 @@ from archinstall.lib.translationhandler import tr
 from archinstall.tui.ui.menu_item import MenuItem, MenuItemGroup
 from archinstall.tui.ui.result import ResultType
 
+# Force pacman to emit untruncated single-line field values. With the default
+# pty width of 80 columns, pacman wraps long fields like Description across
+# multiple lines, and our line-based parser ends up dropping the continuation
+# lines after they get pre-stripped of their leading whitespace. See #3580.
+_WIDE_PACMAN_ENV = {'COLUMNS': '500'}
+
 
 def installed_package(package: str) -> LocalPackage | None:
 	try:
@@ -52,7 +58,7 @@ def package_group_info(package: str) -> PackageGroup | None:
 def available_package(package: str) -> AvailablePackage | None:
 	try:
 		package_info: list[str] = []
-		for line in Pacman.run(f'-S --info {package}'):
+		for line in Pacman.run(f'-S --info {package}', environment_vars=_WIDE_PACMAN_ENV):
 			package_info.append(line.decode().strip())
 
 		return _parse_package_output(package_info, AvailablePackage)
@@ -78,7 +84,7 @@ def list_available_packages(
 	except Exception as e:
 		debug(f'Failed to sync Arch Linux package database: {e}')
 
-	for line in Pacman.run('-S --info'):
+	for line in Pacman.run('-S --info', environment_vars=_WIDE_PACMAN_ENV):
 		dec_line = line.decode().strip()
 		current_package.append(dec_line)
 

archinstall/lib/pacman/pacman.py

@@ -18,7 +18,11 @@ class Pacman:
 		self.target = target
 
 	@staticmethod
-	def run(args: str, default_cmd: str = 'pacman') -> SysCommand:
+	def run(
+		args: str,
+		default_cmd: str = 'pacman',
+		environment_vars: dict[str, str] | None = None,
+	) -> SysCommand:
 		"""
 		A centralized function to call `pacman` from.
 		It also protects us from colliding with other running pacman sessions (if used locally).
@@ -37,7 +41,7 @@ class Pacman:
 				error(tr('Pre-existing pacman lock never exited. Please clean up any existing pacman sessions before using archinstall.'))
 				sys.exit(1)
 
-		return SysCommand(f'{default_cmd} {args}')
+		return SysCommand(f'{default_cmd} {args}', environment_vars=environment_vars)
 
 	def ask(self, error_message: str, bail_message: str, func: Callable, *args, **kwargs) -> None:  # type: ignore[no-untyped-def, type-arg]
 		while True: