Add libgcrypt as an explicit dependancy on Linux (#77926)

packages/flutter_tools/lib/src/base/user_messages.dart

@@ -236,6 +236,8 @@ class UserMessages {
       'It is likely available from your distribution (e.g.: apt install libblkid-dev)';
   String get lzmaLibraryMissing => 'The lzma development library is required for Linux development.\n'
       'It is likely available from your distribution (e.g.: apt install liblzma-dev)';
+  String get gcryptLibraryMissing => 'The gcrypt development library is required for Linux development.\n'
+      'It is likely available from your distribution (e.g.: apt install libgcrypt20-dev)';
 
   // Messages used in FlutterCommand
   String flutterElapsedTime(String name, String elapsedTime) => '"flutter $name" took $elapsedTime.';

packages/flutter_tools/lib/src/linux/linux_doctor.dart

@@ -159,6 +159,10 @@ class LinuxDoctorValidator extends DoctorValidator {
       validationType = ValidationType.missing;
       messages.add(ValidationMessage.error(_userMessages.lzmaLibraryMissing));
     }
+    if (!await _libraryIsPresent('libgcrypt')) {
+      validationType = ValidationType.missing;
+      messages.add(ValidationMessage.error(_userMessages.gcryptLibraryMissing));
+    }
 
     return ValidationResult(validationType, messages);
   }

packages/flutter_tools/templates/app/linux.tmpl/flutter/CMakeLists.txt

@@ -26,6 +26,7 @@ pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
 pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
 pkg_check_modules(BLKID REQUIRED IMPORTED_TARGET blkid)
 pkg_check_modules(LZMA REQUIRED IMPORTED_TARGET liblzma)
+pkg_check_modules(GCRYPT REQUIRED IMPORTED_TARGET libgcrypt)
 
 set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
 
@@ -69,6 +70,7 @@ target_link_libraries(flutter INTERFACE
   PkgConfig::GIO
   PkgConfig::BLKID
   PkgConfig::LZMA
+  PkgConfig::GCRYPT
 )
 add_dependencies(flutter flutter_assemble)
 

packages/flutter_tools/test/general.shard/linux/linux_doctor_test.dart

@@ -102,6 +102,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
       processManager: processManager,
@@ -127,6 +128,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
       processManager: processManager,
@@ -153,6 +155,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
       processManager: processManager,
@@ -179,6 +182,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
       processManager: processManager,
@@ -205,6 +209,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
       processManager: processManager,
@@ -231,6 +236,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final UserMessages userMessages = UserMessages();
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
@@ -257,6 +263,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final UserMessages userMessages = UserMessages();
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
@@ -283,6 +290,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final UserMessages userMessages = UserMessages();
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
@@ -309,6 +317,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final UserMessages userMessages = UserMessages();
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
@@ -335,6 +344,7 @@ void main() {
       ..._gtkLibrariesMissingCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final UserMessages userMessages = UserMessages();
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
@@ -362,6 +372,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid', exists: false),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final UserMessages userMessages = UserMessages();
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
@@ -389,6 +400,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma', exists: false),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final UserMessages userMessages = UserMessages();
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
@@ -407,6 +419,34 @@ void main() {
     ]);
   });
 
+  testWithoutContext('Missing validation when libgcrypt is not available', () async {
+    final ProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
+      _clangPresentCommand('4.0.1'),
+      _cmakePresentCommand('3.16.3'),
+      _ninjaPresentCommand('1.10.0'),
+      _pkgConfigPresentCommand('0.29'),
+      ..._gtkLibrariesPresentCommands(),
+      _libraryCheckCommand('blkid'),
+      _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt', exists: false),
+    ]);
+    final UserMessages userMessages = UserMessages();
+    final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
+      processManager: processManager,
+      userMessages: userMessages,
+    );
+    final ValidationResult result = await linuxDoctorValidator.validate();
+
+    expect(result.type, ValidationType.missing);
+    expect(result.messages, <ValidationMessage>[
+      const ValidationMessage('clang version 4.0.1-6+build1'),
+      const ValidationMessage('cmake version 3.16.3'),
+      const ValidationMessage('ninja version 1.10.0'),
+      const ValidationMessage('pkg-config version 0.29'),
+      ValidationMessage.error(userMessages.gcryptLibraryMissing),
+    ]);
+  });
+
   testWithoutContext('Missing validation when multiple dependencies are not available', () async {
     final ProcessManager processManager = FakeProcessManager.list(<FakeCommand>[
       _missingBinaryCommand('clang++'),
@@ -416,6 +456,7 @@ void main() {
       ..._gtkLibrariesPresentCommands(),
       _libraryCheckCommand('blkid'),
       _libraryCheckCommand('liblzma'),
+      _libraryCheckCommand('libgcrypt'),
     ]);
     final DoctorValidator linuxDoctorValidator = LinuxDoctorValidator(
       processManager: processManager,