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{ Arch, copyDir, copyFile, exec, exists, InvalidConfigurationError, log } from \"builder-util\"\nimport * as fs from \"fs-extra\"\nimport * as path from \"path\"\nimport { FileAssociation } from \"../../options/FileAssociation\"\nimport { getAppImageTools } from \"../../toolsets/linux\"\nimport { copyIcons, copyMimeTypes } from \"./appLauncher\"\nimport { appendBlockmap } from \"../differentialUpdateInfoBuilder\"\nimport { BlockMapDataHolder } from \"builder-util-runtime\"\nimport { APP_RUN_ENTRYPOINT } from \"./AppImageTarget\"\nimport { ToolsetConfig } from \"../../configuration\"\nimport { IconInfo } from \"../../util/iconConverter\"\n\ninterface Options {\n productName: string\n productFilename: string\n executableName: string\n desktopEntry: string\n icons: IconInfo[]\n license?: string | null\n fileAssociations: FileAssociation[]\n /**\n * The compression type available for static runtime is limited as it's only compiled with support for gzip and zstd.\n * \"xz\" is only valid for the legacy FUSE2 (0.0.0) toolset.\n *\n * [stderr] Squashfs image uses lzo compression, this version supports only zlib, zstd.\n * Failed to open squashfs image\n * Failed to extract AppImage\n *\n */\n compression?: \"gzip\" | \"zstd\" | \"xz\"\n /** Pre-computed desktop basename (already validated). When absent, falls back to `executableName`. */\n desktopBaseName?: string\n}\n\nexport interface AppImageBuilderOptions {\n appDir: string\n stageDir: string\n arch: Arch\n output: string\n options: Options\n}\n\nexport async function buildStaticRuntimeAppImage(appimageToolVersion: ToolsetConfig[\"appimage\"], opts: AppImageBuilderOptions): Promise {\n const { stageDir, output, appDir, options, arch } = opts\n\n try {\n await fs.remove(output)\n\n // Write AppRun launcher and related files\n await writeAppLauncherAndRelatedFiles(opts)\n\n const { runtimeLibraries: libraries, runtime, mksquashfs } = await getAppImageTools(appimageToolVersion, arch)\n await copyDir(libraries, path.join(stageDir, \"usr\", \"lib\"))\n\n // Copy app directory to stage\n // mksquashfs doesn't support merging, so we copy the entire app dir\n await copyDir(appDir, stageDir)\n\n const runtimeData = await fs.readFile(runtime)\n\n // Create squashfs with offset for runtime\n const args: string[] = [stageDir, output, \"-offset\", runtimeData.length.toString(), \"-all-root\", \"-noappend\", \"-no-progress\", \"-quiet\", \"-no-xattrs\", \"-no-fragments\"]\n if (options.compression) {\n args.push(\"-comp\", options.compression)\n }\n await exec(mksquashfs, args, {\n cwd: stageDir,\n })\n\n // Write runtime data at the beginning of the file\n await writeRuntimeData(output, runtimeData)\n\n // Make executable\n await fs.chmod(output, 0o755)\n\n // Append blockmap inside try block to ensure cleanup on failure\n const updateInfo = await appendBlockmap(output)\n return updateInfo\n } catch (error) {\n // Clean up partial build on failure\n await fs.remove(output).catch(() => {})\n throw error\n }\n}\n\nexport async function buildLegacyFuse2AppImage(opts: AppImageBuilderOptions): Promise {\n const { stageDir, output, appDir, options, arch } = opts\n\n try {\n await fs.remove(output)\n\n await writeAppLauncherAndRelatedFiles(opts)\n\n const { runtime, mksquashfs, runtimeLibraries } = await getAppImageTools(\"0.0.0\", arch)\n // Mirror the app-builder-lib Go implementation: bundle lib/ into usr/lib for x64 and ia32.\n // arm targets don't have a dedicated lib dir in the FUSE2 toolset.\n if (arch === Arch.x64 || arch === Arch.ia32) {\n await copyDir(runtimeLibraries, path.join(stageDir, \"usr\", \"lib\"))\n }\n await copyDir(appDir, stageDir)\n\n const runtimeData = await fs.readFile(runtime)\n\n const args: string[] = [stageDir, output, \"-offset\", runtimeData.length.toString(), \"-all-root\", \"-noappend\", \"-no-progress\", \"-quiet\", \"-no-xattrs\", \"-no-fragments\"]\n if (options.compression) {\n args.push(\"-comp\", options.compression)\n if (options.compression === \"xz\") {\n // Match the dictionary/block-size settings used by the original app-builder Go implementation\n args.push(\"-Xdict-size\", \"100%\", \"-b\", \"1048576\")\n }\n }\n await exec(mksquashfs, args, { cwd: stageDir })\n\n await writeRuntimeData(output, runtimeData)\n await fs.chmod(output, 0o755)\n\n const updateInfo = await appendBlockmap(output)\n return updateInfo\n } catch (error) {\n await fs.remove(output).catch(() => {})\n throw error\n }\n}\n\nasync function writeRuntimeData(filePath: string, runtimeData: Buffer): Promise {\n const fd = await fs.open(filePath, \"r+\")\n try {\n await fs.write(fd, runtimeData, 0, runtimeData.length, 0)\n } finally {\n try {\n await fs.close(fd)\n } catch (closeError: any) {\n // Log but don't throw - preserve original error if any\n log.warn({ message: closeError.message, file: filePath }, `failed to close file descriptor`)\n }\n }\n}\n\n/**\n * Escapes a string for safe use in shell scripts by wrapping in single quotes\n * and escaping any single quotes within the string.\n *\n * This allows strings with spaces, special characters, etc. to be safely used.\n */\nfunction escapeShellString(str: string): string {\n // Escape single quotes by replacing ' with '\\''\n // Then wrap the whole string in single quotes\n return `'${str.replace(/'/g, \"'\\\\''\")}'`\n}\n\n/**\n * Validates that critical path fields (executable name, product filename, license filename)\n * contain only characters that are safe for use in filesystem paths and embedded bash strings.\n * Allowed: Unicode letters, digits, dots, underscores, hyphens, and spaces.\n */\nexport function validateCriticalPathString(str: string, fieldName: string): void {\n if (!/^[\\p{L}\\p{N}._\\- ]+$/u.test(str)) {\n throw new InvalidConfigurationError(\n `${fieldName} contains characters that cannot be safely used in file paths: ${str}. Please use only letters, digits, hyphens, underscores, dots, and spaces.`\n )\n }\n}\n\nasync function writeAppLauncherAndRelatedFiles(opts: AppImageBuilderOptions): Promise {\n const {\n stageDir,\n options: { license, executableName, productFilename, productName, desktopEntry, desktopBaseName },\n } = opts\n\n // executableName and productFilename are embedded directly into double-quoted bash strings\n // and used as filesystem paths, so they must pass the whitelist.\n // productName is not validated here because it is only ever passed through escapeShellString().\n validateCriticalPathString(executableName, \"executableName\")\n validateCriticalPathString(productFilename, \"productFilename\")\n\n // Write desktop file\n const desktopFileName = `${desktopBaseName ?? executableName}.desktop`\n await fs.writeFile(path.join(stageDir, desktopFileName), desktopEntry, { mode: 0o644 })\n await copyIcons(opts)\n\n const templateConfig: AppRunScriptBase = {\n DesktopFileName: desktopFileName,\n ExecutableName: executableName,\n ProductName: productName,\n ProductFilename: productFilename,\n ResourceName: `appimagekit-${executableName}`,\n }\n\n const mimeTypeFile = await copyMimeTypes(stageDir, opts.options)\n if (mimeTypeFile) {\n templateConfig.MimeTypeFile = mimeTypeFile\n }\n\n let finalConfig: AppRunScript = templateConfig\n\n // Copy license file if provided\n if (license) {\n // Validate license file exists\n if (!(await exists(license))) {\n throw new InvalidConfigurationError(`License file not found: ${license}`)\n }\n\n const licenseBaseName = path.basename(license)\n const ext = path.extname(license).toLowerCase()\n\n // Validate license filename for path safety\n validateCriticalPathString(licenseBaseName, \"licenseBaseName\")\n\n // Validate extension\n if (![\".txt\", \".html\"].includes(ext)) {\n log.warn({ license, expected: \".txt or .html\" }, `license file has unexpected extension`)\n }\n\n await copyFile(license, path.join(stageDir, licenseBaseName))\n\n finalConfig = {\n ...templateConfig,\n EulaFile: licenseBaseName,\n IsHtmlEula: ext === \".html\",\n }\n }\n\n const appRunContent = generateAppRunScript(finalConfig)\n await fs.writeFile(path.join(stageDir, APP_RUN_ENTRYPOINT), appRunContent, { mode: 0o755 })\n}\n\nexport type AppRunScriptBase = {\n ExecutableName: string\n DesktopFileName: string\n ProductFilename: string\n ProductName: string\n ResourceName: string\n MimeTypeFile?: string\n}\n\nexport type AppRunScriptWithEula = AppRunScriptBase & {\n EulaFile: string\n IsHtmlEula: boolean\n}\n\nexport type AppRunScript = AppRunScriptBase | AppRunScriptWithEula\n\nfunction hasEula(config: AppRunScript): config is AppRunScriptWithEula {\n return \"EulaFile\" in config && typeof config.EulaFile === \"string\"\n}\n\nexport function generateAppRunScript(config: AppRunScript): string {\n const eulaEnabled = hasEula(config)\n\n return `#!/usr/bin/env bash\nset -e\n\nTHIS=\"$0\"\n# http://stackoverflow.com/questions/3190818/\nargs=(\"$@\")\nNUMBER_OF_ARGS=\"$#\"\n\nif [ -z \"$APPDIR\" ] ; then\n # Find the AppDir. It is the directory that contains AppRun.\n # This assumes that this script resides inside the AppDir or a subdirectory.\n # If this script is run inside an AppImage, then the AppImage runtime likely has already set $APPDIR\n path=\"$(dirname \"$(readlink -f \"\\${THIS}\")\")\"\n while [[ \"$path\" != \"\" && ! -e \"$path/${APP_RUN_ENTRYPOINT}\" ]]; do\n path=\\${path%/*}\n done\n APPDIR=\"$path\"\nfi\n\nif [ -z \"$APPDIR\" ] ; then\n echo \"ERROR: could not locate the AppDir. Ensure this script is run from within a properly structured AppImage.\" >&2\n exit 1\nfi\n\nexport PATH=\"\\${APPDIR}:\\${APPDIR}/usr/sbin\\${PATH:+:\\${PATH}}\"\nexport XDG_DATA_DIRS=\"\\${APPDIR}/usr/share/\\${XDG_DATA_DIRS:+:\\${XDG_DATA_DIRS}}:/usr/share/gnome:/usr/local/share/:/usr/share/\"\nexport LD_LIBRARY_PATH=\"\\${APPDIR}/usr/lib\\${LD_LIBRARY_PATH:+:\\${LD_LIBRARY_PATH}}\"\nexport GSETTINGS_SCHEMA_DIR=\"\\${APPDIR}/usr/share/glib-2.0/schemas\\${GSETTINGS_SCHEMA_DIR:+:\\${GSETTINGS_SCHEMA_DIR}}\"\n\nBIN=\"$APPDIR/${config.ExecutableName}\"\n\nif [ -z \"$APPIMAGE_EXIT_AFTER_INSTALL\" ] ; then\n trap atexit EXIT\nfi\n\nisEulaAccepted=1\n\nHAVE_NO_SANDBOX=0\nfor arg in \"\\${args[@]}\" ; do\n if [ \"$arg\" = --no-sandbox ] ; then\n HAVE_NO_SANDBOX=1\n break\n fi\ndone\nNO_SANDBOX=()\n# Use 'unshare -Ur true' as a heuristic to detect whether user namespaces are available.\n# Notes:\n# - When running as root, this check will always succeed even if the sandbox configuration\n# actually relies on unprivileged user namespaces. In practice, Chrome/Electron usually\n# disables or adjusts the sandbox separately when running as root, so this probe is mostly\n# a no-op in that scenario.\n# - On minimal systems (e.g. Alpine or stripped-down containers) 'unshare' may not exist.\n# In that case the shell will return exit code 127 (\"command not found\"), which will cause\n# us to add '--no-sandbox'. This is an intentional fail-safe: we prefer the app to start\n# without sandboxing rather than crash on startup.\nif [ $HAVE_NO_SANDBOX -eq 0 ] && ! unshare -Ur true 2>/dev/null ; then\n NO_SANDBOX=(--no-sandbox)\nfi\n\natexit()\n{\n if [ $isEulaAccepted == 1 ] ; then\n if [ $NUMBER_OF_ARGS -eq 0 ] ; then\n exec \"$BIN\" \"\\${NO_SANDBOX[@]}\"\n else\n exec \"$BIN\" \"\\${NO_SANDBOX[@]}\" \"\\${args[@]}\"\n fi\n fi\n}\n\nerror()\n{\n if [ -x /usr/bin/zenity ] ; then\n LD_LIBRARY_PATH=\"\" zenity --error --text \"\\${1}\" 2>/dev/null\n elif [ -x /usr/bin/kdialog ] ; then\n LD_LIBRARY_PATH=\"\" kdialog --msgbox \"\\${1}\" 2>/dev/null\n elif [ -x /usr/bin/Xdialog ] ; then\n LD_LIBRARY_PATH=\"\" Xdialog --msgbox \"\\${1}\" 2>/dev/null\n else\n echo \"\\${1}\"\n fi\n exit 1\n}\n\nyesno()\n{\n TITLE=$1\n TEXT=$2\n if [ -x /usr/bin/zenity ] ; then\n LD_LIBRARY_PATH=\"\" zenity --question --title=\"$TITLE\" --text=\"$TEXT\" 2>/dev/null || exit 0\n elif [ -x /usr/bin/kdialog ] ; then\n LD_LIBRARY_PATH=\"\" kdialog --title \"$TITLE\" --yesno \"$TEXT\" || exit 0\n elif [ -x /usr/bin/Xdialog ] ; then\n LD_LIBRARY_PATH=\"\" Xdialog --title \"$TITLE\" --clear --yesno \"$TEXT\" 10 80 || exit 0\n else\n echo \"zenity, kdialog, Xdialog missing. Skipping \\${THIS}.\"\n exit 0\n fi\n}\n\ncheck_dep()\n{\n DEP=$1\n if ! command -v \"$DEP\" &>/dev/null ; then\n echo \"$DEP is missing. Skipping \\${THIS}.\"\n exit 0\n fi\n}\n\nif [ -z \"$APPIMAGE\" ] ; then\n APPIMAGE=\"$APPDIR/${APP_RUN_ENTRYPOINT}\"\n # not running from within an AppImage; hence using the AppRun for Exec=\nfi\n\n${\n eulaEnabled\n ? `if [ -z \"$APPIMAGE_SILENT_INSTALL\" ] ; then\n EULA_MARK_DIR=\"\\${XDG_CONFIG_HOME:-$HOME/.config}/${config.ProductFilename}\"\n EULA_MARK_FILE=\"$EULA_MARK_DIR/eulaAccepted\"\n # show EULA only if desktop file doesn't exist\n if [ ! -e \"$EULA_MARK_FILE\" ] ; then\n if [ -x /usr/bin/zenity ] ; then\n # on cancel simply exits and our trap handler launches app, so, $isEulaAccepted is set here to 0 and then to 1 if EULA accepted\n isEulaAccepted=0\n LD_LIBRARY_PATH=\"\" zenity --text-info --title=${escapeShellString(config.ProductName)} --filename=\"$APPDIR/${config.EulaFile}\" --ok-label=Agree --cancel-label=Disagree ${config.IsHtmlEula ? \"--html\" : \"\"}\n elif [ -x /usr/bin/Xdialog ] ; then\n isEulaAccepted=0\n LD_LIBRARY_PATH=\"\" Xdialog --title ${escapeShellString(config.ProductName)} --textbox \"$APPDIR/${config.EulaFile}\" 30 80 --ok-label Agree --cancel-label Disagree\n elif [ -x /usr/bin/kdialog ] ; then\n # cannot find any option to force Agree/Disagree buttons for kdialog. And official example exactly with OK button https://techbase.kde.org/Development/Tutorials/Shell_Scripting_with_KDE_Dialogs#Example_21._--textbox_dialog_box\n # in any case we pass labels text\n isEulaAccepted=0\n LD_LIBRARY_PATH=\"\" kdialog --textbox \"$APPDIR/${config.EulaFile}\" --yes-label Agree --cancel-label \"Disagree\"\n fi\n\n case $? in\n 0)\n isEulaAccepted=1\n echo \"License accepted\"\n mkdir -p \"$EULA_MARK_DIR\"\n touch \"$EULA_MARK_FILE\"\n ;;\n 1)\n echo \"License not accepted\"\n exit 0\n ;;\n -1)\n echo \"An unexpected error has occurred.\"\n isEulaAccepted=1\n ;;\n esac\n fi\nfi`\n : \"\"\n}\n`\n}\n"]}