style(3p/nix): Reformat project in Google C++ style r/740

Reformatted with:

    fd . -e hh -e cc | xargs clang-format -i

1 files changed, 212 insertions, 210 deletions

diff --git a/third_party/nix/src/nix-channel/nix-channel.cc b/third_party/nix/src/nix-channel/nix-channel.cc
index 70aa5c96669d..eda8d827ae30 100755..100644
--- a/third_party/nix/src/nix-channel/nix-channel.cc
+++ b/third_party/nix/src/nix-channel/nix-channel.cc
@@ -1,248 +1,250 @@
-#include "shared.hh"
-#include "globals.hh"
-#include "download.hh"
-#include "store-api.hh"
-#include "legacy.hh"
-
 #include <fcntl.h>
-#include <regex>
 #include <pwd.h>
+#include <regex>
+#include "download.hh"
+#include "globals.hh"
+#include "legacy.hh"
+#include "shared.hh"
+#include "store-api.hh"
 
 using namespace nix;
 
-typedef std::map<string,string> Channels;
+typedef std::map<string, string> Channels;
 
 static Channels channels;
 static Path channelsList;
 
 // Reads the list of channels.
-static void readChannels()
-{
-    if (!pathExists(channelsList)) return;
-    auto channelsFile = readFile(channelsList);
-
-    for (const auto & line : tokenizeString<std::vector<string>>(channelsFile, "\n")) {
-        chomp(line);
-        if (std::regex_search(line, std::regex("^\\s*\\#")))
-            continue;
-        auto split = tokenizeString<std::vector<string>>(line, " ");
-        auto url = std::regex_replace(split[0], std::regex("/*$"), "");
-        auto name = split.size() > 1 ? split[1] : baseNameOf(url);
-        channels[name] = url;
-    }
+static void readChannels() {
+  if (!pathExists(channelsList)) return;
+  auto channelsFile = readFile(channelsList);
+
+  for (const auto& line :
+       tokenizeString<std::vector<string>>(channelsFile, "\n")) {
+    chomp(line);
+    if (std::regex_search(line, std::regex("^\\s*\\#"))) continue;
+    auto split = tokenizeString<std::vector<string>>(line, " ");
+    auto url = std::regex_replace(split[0], std::regex("/*$"), "");
+    auto name = split.size() > 1 ? split[1] : baseNameOf(url);
+    channels[name] = url;
+  }
 }
 
 // Writes the list of channels.
-static void writeChannels()
-{
-    auto channelsFD = AutoCloseFD{open(channelsList.c_str(), O_WRONLY | O_CLOEXEC | O_CREAT | O_TRUNC, 0644)};
-    if (!channelsFD)
-        throw SysError(format("opening '%1%' for writing") % channelsList);
-    for (const auto & channel : channels)
-        writeFull(channelsFD.get(), channel.second + " " + channel.first + "\n");
+static void writeChannels() {
+  auto channelsFD = AutoCloseFD{open(
+      channelsList.c_str(), O_WRONLY | O_CLOEXEC | O_CREAT | O_TRUNC, 0644)};
+  if (!channelsFD)
+    throw SysError(format("opening '%1%' for writing") % channelsList);
+  for (const auto& channel : channels)
+    writeFull(channelsFD.get(), channel.second + " " + channel.first + "\n");
 }
 
 // Adds a channel.
-static void addChannel(const string & url, const string & name)
-{
-    if (!regex_search(url, std::regex("^(file|http|https)://")))
-        throw Error(format("invalid channel URL '%1%'") % url);
-    if (!regex_search(name, std::regex("^[a-zA-Z0-9_][a-zA-Z0-9_\\.-]*$")))
-        throw Error(format("invalid channel identifier '%1%'") % name);
-    readChannels();
-    channels[name] = url;
-    writeChannels();
+static void addChannel(const string& url, const string& name) {
+  if (!regex_search(url, std::regex("^(file|http|https)://")))
+    throw Error(format("invalid channel URL '%1%'") % url);
+  if (!regex_search(name, std::regex("^[a-zA-Z0-9_][a-zA-Z0-9_\\.-]*$")))
+    throw Error(format("invalid channel identifier '%1%'") % name);
+  readChannels();
+  channels[name] = url;
+  writeChannels();
 }
 
 static Path profile;
 
 // Remove a channel.
-static void removeChannel(const string & name)
-{
-    readChannels();
-    channels.erase(name);
-    writeChannels();
+static void removeChannel(const string& name) {
+  readChannels();
+  channels.erase(name);
+  writeChannels();
 
-    runProgram(settings.nixBinDir + "/nix-env", true, { "--profile", profile, "--uninstall", name });
+  runProgram(settings.nixBinDir + "/nix-env", true,
+             {"--profile", profile, "--uninstall", name});
 }
 
 static Path nixDefExpr;
 
 // Fetch Nix expressions and binary cache URLs from the subscribed channels.
-static void update(const StringSet & channelNames)
-{
-    readChannels();
-
-    auto store = openStore();
-
-    // Download each channel.
-    Strings exprs;
-    for (const auto & channel : channels) {
-        auto name = channel.first;
-        auto url = channel.second;
-        if (!(channelNames.empty() || channelNames.count(name)))
-            continue;
-
-        // We want to download the url to a file to see if it's a tarball while also checking if we
-        // got redirected in the process, so that we can grab the various parts of a nix channel
-        // definition from a consistent location if the redirect changes mid-download.
-        CachedDownloadRequest request(url);
-        request.ttl = 0;
-        auto dl = getDownloader();
-        auto result = dl->downloadCached(store, request);
-        auto filename = result.path;
-        url = chomp(result.effectiveUri);
-
-        // If the URL contains a version number, append it to the name
-        // attribute (so that "nix-env -q" on the channels profile
-        // shows something useful).
-        auto cname = name;
-        std::smatch match;
-        auto urlBase = baseNameOf(url);
-        if (std::regex_search(urlBase, match, std::regex("(-\\d.*)$"))) {
-            cname = cname + (string) match[1];
-        }
-
-        std::string extraAttrs;
-
-        bool unpacked = false;
-        if (std::regex_search(filename, std::regex("\\.tar\\.(gz|bz2|xz)$"))) {
-            runProgram(settings.nixBinDir + "/nix-build", false, { "--no-out-link", "--expr", "import <nix/unpack-channel.nix> "
-                        "{ name = \"" + cname + "\"; channelName = \"" + name + "\"; src = builtins.storePath \"" + filename + "\"; }" });
-            unpacked = true;
-        }
-
-        if (!unpacked) {
-            // Download the channel tarball.
-            try {
-                filename = dl->downloadCached(store, CachedDownloadRequest(url + "/nixexprs.tar.xz")).path;
-            } catch (DownloadError & e) {
-                filename = dl->downloadCached(store, CachedDownloadRequest(url + "/nixexprs.tar.bz2")).path;
-            }
-            chomp(filename);
-        }
+static void update(const StringSet& channelNames) {
+  readChannels();
+
+  auto store = openStore();
+
+  // Download each channel.
+  Strings exprs;
+  for (const auto& channel : channels) {
+    auto name = channel.first;
+    auto url = channel.second;
+    if (!(channelNames.empty() || channelNames.count(name))) continue;
+
+    // We want to download the url to a file to see if it's a tarball while also
+    // checking if we got redirected in the process, so that we can grab the
+    // various parts of a nix channel definition from a consistent location if
+    // the redirect changes mid-download.
+    CachedDownloadRequest request(url);
+    request.ttl = 0;
+    auto dl = getDownloader();
+    auto result = dl->downloadCached(store, request);
+    auto filename = result.path;
+    url = chomp(result.effectiveUri);
+
+    // If the URL contains a version number, append it to the name
+    // attribute (so that "nix-env -q" on the channels profile
+    // shows something useful).
+    auto cname = name;
+    std::smatch match;
+    auto urlBase = baseNameOf(url);
+    if (std::regex_search(urlBase, match, std::regex("(-\\d.*)$"))) {
+      cname = cname + (string)match[1];
+    }
 
-        // Regardless of where it came from, add the expression representing this channel to accumulated expression
-        exprs.push_back("f: f { name = \"" + cname + "\"; channelName = \"" + name + "\"; src = builtins.storePath \"" + filename + "\"; " + extraAttrs + " }");
+    std::string extraAttrs;
+
+    bool unpacked = false;
+    if (std::regex_search(filename, std::regex("\\.tar\\.(gz|bz2|xz)$"))) {
+      runProgram(settings.nixBinDir + "/nix-build", false,
+                 {"--no-out-link", "--expr",
+                  "import <nix/unpack-channel.nix> "
+                  "{ name = \"" +
+                      cname + "\"; channelName = \"" + name +
+                      "\"; src = builtins.storePath \"" + filename + "\"; }"});
+      unpacked = true;
     }
 
-    // Unpack the channel tarballs into the Nix store and install them
-    // into the channels profile.
-    std::cerr << "unpacking channels...\n";
-    Strings envArgs{ "--profile", profile, "--file", "<nix/unpack-channel.nix>", "--install", "--from-expression" };
-    for (auto & expr : exprs)
-        envArgs.push_back(std::move(expr));
-    envArgs.push_back("--quiet");
-    runProgram(settings.nixBinDir + "/nix-env", false, envArgs);
-
-    // Make the channels appear in nix-env.
-    struct stat st;
-    if (lstat(nixDefExpr.c_str(), &st) == 0) {
-        if (S_ISLNK(st.st_mode))
-            // old-skool ~/.nix-defexpr
-            if (unlink(nixDefExpr.c_str()) == -1)
-                throw SysError(format("unlinking %1%") % nixDefExpr);
-    } else if (errno != ENOENT) {
-        throw SysError(format("getting status of %1%") % nixDefExpr);
+    if (!unpacked) {
+      // Download the channel tarball.
+      try {
+        filename = dl->downloadCached(
+                         store, CachedDownloadRequest(url + "/nixexprs.tar.xz"))
+                       .path;
+      } catch (DownloadError& e) {
+        filename =
+            dl->downloadCached(store,
+                               CachedDownloadRequest(url + "/nixexprs.tar.bz2"))
+                .path;
+      }
+      chomp(filename);
     }
-    createDirs(nixDefExpr);
-    auto channelLink = nixDefExpr + "/channels";
-    replaceSymlink(profile, channelLink);
+
+    // Regardless of where it came from, add the expression representing this
+    // channel to accumulated expression
+    exprs.push_back("f: f { name = \"" + cname + "\"; channelName = \"" + name +
+                    "\"; src = builtins.storePath \"" + filename + "\"; " +
+                    extraAttrs + " }");
+  }
+
+  // Unpack the channel tarballs into the Nix store and install them
+  // into the channels profile.
+  std::cerr << "unpacking channels...\n";
+  Strings envArgs{"--profile", profile,
+                  "--file",    "<nix/unpack-channel.nix>",
+                  "--install", "--from-expression"};
+  for (auto& expr : exprs) envArgs.push_back(std::move(expr));
+  envArgs.push_back("--quiet");
+  runProgram(settings.nixBinDir + "/nix-env", false, envArgs);
+
+  // Make the channels appear in nix-env.
+  struct stat st;
+  if (lstat(nixDefExpr.c_str(), &st) == 0) {
+    if (S_ISLNK(st.st_mode))
+      // old-skool ~/.nix-defexpr
+      if (unlink(nixDefExpr.c_str()) == -1)
+        throw SysError(format("unlinking %1%") % nixDefExpr);
+  } else if (errno != ENOENT) {
+    throw SysError(format("getting status of %1%") % nixDefExpr);
+  }
+  createDirs(nixDefExpr);
+  auto channelLink = nixDefExpr + "/channels";
+  replaceSymlink(profile, channelLink);
 }
 
-static int _main(int argc, char ** argv)
-{
-    {
-        // Figure out the name of the `.nix-channels' file to use
-        auto home = getHome();
-        channelsList = home + "/.nix-channels";
-        nixDefExpr = home + "/.nix-defexpr";
-
-        // Figure out the name of the channels profile.
-        profile = fmt("%s/profiles/per-user/%s/channels", settings.nixStateDir, getUserName());
-
-        enum {
-            cNone,
-            cAdd,
-            cRemove,
-            cList,
-            cUpdate,
-            cRollback
-        } cmd = cNone;
-        std::vector<string> args;
-        parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
-            if (*arg == "--help") {
-                showManPage("nix-channel");
-            } else if (*arg == "--version") {
-                printVersion("nix-channel");
-            } else if (*arg == "--add") {
-                cmd = cAdd;
-            } else if (*arg == "--remove") {
-                cmd = cRemove;
-            } else if (*arg == "--list") {
-                cmd = cList;
-            } else if (*arg == "--update") {
-                cmd = cUpdate;
-            } else if (*arg == "--rollback") {
-                cmd = cRollback;
-            } else {
-                args.push_back(std::move(*arg));
-            }
-            return true;
-        });
-
-        initPlugins();
-
-        switch (cmd) {
-            case cNone:
-                throw UsageError("no command specified");
-            case cAdd:
-                if (args.size() < 1 || args.size() > 2)
-                    throw UsageError("'--add' requires one or two arguments");
-                {
-                auto url = args[0];
-                std::string name;
-                if (args.size() == 2) {
-                    name = args[1];
-                } else {
-                    name = baseNameOf(url);
-                    name = std::regex_replace(name, std::regex("-unstable$"), "");
-                    name = std::regex_replace(name, std::regex("-stable$"), "");
-                }
-                addChannel(url, name);
-                }
-                break;
-            case cRemove:
-                if (args.size() != 1)
-                    throw UsageError("'--remove' requires one argument");
-                removeChannel(args[0]);
-                break;
-            case cList:
-                if (!args.empty())
-                    throw UsageError("'--list' expects no arguments");
-                readChannels();
-                for (const auto & channel : channels)
-                    std::cout << channel.first << ' ' << channel.second << '\n';
-                break;
-            case cUpdate:
-                update(StringSet(args.begin(), args.end()));
-                break;
-            case cRollback:
-                if (args.size() > 1)
-                    throw UsageError("'--rollback' has at most one argument");
-                Strings envArgs{"--profile", profile};
-                if (args.size() == 1) {
-                    envArgs.push_back("--switch-generation");
-                    envArgs.push_back(args[0]);
-                } else {
-                    envArgs.push_back("--rollback");
-                }
-                runProgram(settings.nixBinDir + "/nix-env", false, envArgs);
-                break;
+static int _main(int argc, char** argv) {
+  {
+    // Figure out the name of the `.nix-channels' file to use
+    auto home = getHome();
+    channelsList = home + "/.nix-channels";
+    nixDefExpr = home + "/.nix-defexpr";
+
+    // Figure out the name of the channels profile.
+    profile = fmt("%s/profiles/per-user/%s/channels", settings.nixStateDir,
+                  getUserName());
+
+    enum { cNone, cAdd, cRemove, cList, cUpdate, cRollback } cmd = cNone;
+    std::vector<string> args;
+    parseCmdLine(argc, argv,
+                 [&](Strings::iterator& arg, const Strings::iterator& end) {
+                   if (*arg == "--help") {
+                     showManPage("nix-channel");
+                   } else if (*arg == "--version") {
+                     printVersion("nix-channel");
+                   } else if (*arg == "--add") {
+                     cmd = cAdd;
+                   } else if (*arg == "--remove") {
+                     cmd = cRemove;
+                   } else if (*arg == "--list") {
+                     cmd = cList;
+                   } else if (*arg == "--update") {
+                     cmd = cUpdate;
+                   } else if (*arg == "--rollback") {
+                     cmd = cRollback;
+                   } else {
+                     args.push_back(std::move(*arg));
+                   }
+                   return true;
+                 });
+
+    initPlugins();
+
+    switch (cmd) {
+      case cNone:
+        throw UsageError("no command specified");
+      case cAdd:
+        if (args.size() < 1 || args.size() > 2)
+          throw UsageError("'--add' requires one or two arguments");
+        {
+          auto url = args[0];
+          std::string name;
+          if (args.size() == 2) {
+            name = args[1];
+          } else {
+            name = baseNameOf(url);
+            name = std::regex_replace(name, std::regex("-unstable$"), "");
+            name = std::regex_replace(name, std::regex("-stable$"), "");
+          }
+          addChannel(url, name);
         }
-
-        return 0;
+        break;
+      case cRemove:
+        if (args.size() != 1)
+          throw UsageError("'--remove' requires one argument");
+        removeChannel(args[0]);
+        break;
+      case cList:
+        if (!args.empty()) throw UsageError("'--list' expects no arguments");
+        readChannels();
+        for (const auto& channel : channels)
+          std::cout << channel.first << ' ' << channel.second << '\n';
+        break;
+      case cUpdate:
+        update(StringSet(args.begin(), args.end()));
+        break;
+      case cRollback:
+        if (args.size() > 1)
+          throw UsageError("'--rollback' has at most one argument");
+        Strings envArgs{"--profile", profile};
+        if (args.size() == 1) {
+          envArgs.push_back("--switch-generation");
+          envArgs.push_back(args[0]);
+        } else {
+          envArgs.push_back("--rollback");
+        }
+        runProgram(settings.nixBinDir + "/nix-env", false, envArgs);
+        break;
     }
+
+    return 0;
+  }
 }
 
 static RegisterLegacyCommand s1("nix-channel", _main);