Delete 'vcpkg cache'. (#1174)

* Delete 'vcpkg cache'.

'vcpkg cache' was a helper for folks to attempt to implement caching systems. It prints the contents of the "packages" directory. It was a kind of helper for before we had real binary caching support built into the tool proper.

@vicroms indicates that telemetry shows fewer than 100 invocations of `vcpkg cache` in the last 90 days, so this should be OK to outright remove without a deprecation period.

* Also get rid of unique messages.

include/vcpkg/base/message-data.inc.h

@@ -417,10 +417,6 @@ DECLARE_MESSAGE(BuildTroubleshootingMessage4,
                 "Please use the prefilled template from {path} when reporting your issue.")
 DECLARE_MESSAGE(BuiltInTriplets, (), "", "vcpkg built-in triplets:")
 DECLARE_MESSAGE(BuiltWithIncorrectArchitecture, (), "", "The following files were built for an incorrect architecture:")
-DECLARE_MESSAGE(CacheHelp,
-                (),
-                "",
-                "The argument should be a substring to search for or no argument to display all cached libraries.")
 DECLARE_MESSAGE(CheckedOutGitSha, (msg::commit_sha), "", "Checked out Git SHA: {commit_sha}")
 DECLARE_MESSAGE(CheckedOutObjectMissingManifest,
                 (),
@@ -1968,7 +1964,6 @@ DECLARE_MESSAGE(NewSpecifyNameVersionOrApplication,
                 "--application to indicate that the manifest is not intended to be used as a port.")
 DECLARE_MESSAGE(NewVersionCannotBeEmpty, (), "", "--version cannot be empty.")
 DECLARE_MESSAGE(NoArgumentsForOption, (msg::option), "", "The option --{option} does not accept an argument.")
-DECLARE_MESSAGE(NoCachedPackages, (), "", "No packages are cached.")
 DECLARE_MESSAGE(NoError, (), "", "no error")
 DECLARE_MESSAGE(NoInstalledPackages,
                 (),

locales/messages.json

@@ -275,7 +275,6 @@
   "_CMakeToolChainFile.comment": "An example of {path} is /foo/bar.",
   "CMakeUsingExportedLibs": "To use exported libraries in CMake projects, add {value} to your CMake command line.",
   "_CMakeUsingExportedLibs.comment": "{value} is a CMake command line switch of the form -DFOO=BAR",
-  "CacheHelp": "The argument should be a substring to search for or no argument to display all cached libraries.",
   "CheckedOutGitSha": "Checked out Git SHA: {commit_sha}",
   "_CheckedOutGitSha.comment": "An example of {commit_sha} is 7cfad47ae9f68b183983090afd6337cd60fd4949.",
   "CheckedOutObjectMissingManifest": "The checked-out object does not contain a CONTROL file or vcpkg.json file.",
@@ -1101,7 +1100,6 @@
   "NewVersionCannotBeEmpty": "--version cannot be empty.",
   "NoArgumentsForOption": "The option --{option} does not accept an argument.",
   "_NoArgumentsForOption.comment": "An example of {option} is editable.",
-  "NoCachedPackages": "No packages are cached.",
   "NoError": "no error",
   "NoInstalledPackages": "No packages are installed. Did you mean `search`?",
   "_NoInstalledPackages.comment": "The name 'search' is the name of a command that is not localized.",

src/vcpkg/commands.cpp

@@ -7,7 +7,6 @@
 #include <vcpkg/commands.bootstrap-standalone.h>
 #include <vcpkg/commands.build-external.h>
 #include <vcpkg/commands.build.h>
-#include <vcpkg/commands.cache.h>
 #include <vcpkg/commands.check-support.h>
 #include <vcpkg/commands.ci-clean.h>
 #include <vcpkg/commands.ci-verify-versions.h>
@@ -80,7 +79,6 @@ namespace vcpkg
         {"add", command_add_and_exit},
         {"x-add-version", command_add_version_and_exit},
         {"autocomplete", command_autocomplete_and_exit},
-        {"cache", command_cache_and_exit},
         {"x-ci-clean", command_ci_clean_and_exit},
         {"x-ci-verify-versions", command_ci_verify_versions_and_exit},
         {"create", command_create_and_exit},

src/vcpkg/commands.help.cpp

@@ -8,7 +8,6 @@
 #include <vcpkg/commands.add.h>
 #include <vcpkg/commands.build-external.h>
 #include <vcpkg/commands.build.h>
-#include <vcpkg/commands.cache.h>
 #include <vcpkg/commands.check-support.h>
 #include <vcpkg/commands.ci-clean.h>
 #include <vcpkg/commands.ci-verify-versions.h>
@@ -127,7 +126,6 @@ namespace
         // bootstrap-standalone intentionally has no help topic
         {"build", command_topic_fn<CommandBuildMetadata>},
         {"build-external", command_topic_fn<CommandBuildExternalMetadata>},
-        {"cache", command_topic_fn<CommandCacheMetadata>},
         {"x-check-support", command_topic_fn<CommandCheckSupportMetadata>},
         {"ci", command_topic_fn<CommandCiMetadata>},
         {"x-ci-clean", command_topic_fn<CommandCiCleanMetadata>},