profile: add --all option to match any package

src/nix/profile-remove.md

@@ -11,9 +11,16 @@ R""(
 * Remove all packages:
 
   ```console
-  # nix profile remove --regex '.*'
+  # nix profile remove --all
   ```
 
+* Remove packages by regular expression:
+
+  ```console
+  # nix profile remove --regex '.*vim.*'
+  ```
+
+
 * Remove a package by store path:
 
   ```console

src/nix/profile-upgrade.md

@@ -6,7 +6,7 @@ R""(
   reference:
 
   ```console
-  # nix profile upgrade --regex '.*'
+  # nix profile upgrade --all
   ```
 
 * Upgrade a specific package by name:
@@ -15,6 +15,12 @@ R""(
   # nix profile upgrade hello
   ```
 
+* Upgrade all packages that include 'vim' in their name:
+
+  ```console
+  # nix profile upgrade --regex '.*vim.*'
+  ```
+
 # Description
 
 This command upgrades a previously installed package in a Nix profile,

src/nix/profile.cc

@@ -458,6 +458,7 @@ enum MatcherType
     Regex,
     StorePath,
     Name,
+    All,
 };
 
 struct Matcher
@@ -500,6 +501,14 @@ Matcher createNameMatcher(const std::string & name) {
     };
 }
 
+Matcher all = {
+    .type = MatcherType::All,
+    .title = "--all",
+    .matches = [](const std::string &name, const ProfileElement & element) {
+        return true;
+    }
+};
+
 class MixProfileElementMatchers : virtual Args, virtual StoreCommand
 {
     std::vector<Matcher> _matchers;
@@ -508,6 +517,13 @@ public:
 
     MixProfileElementMatchers()
     {
+        addFlag({
+            .longName = "all",
+            .description = "Match all packages in the profile.",
+            .handler = {[this]() {
+                _matchers.push_back(all);
+            }},
+        });
         addFlag({
             .longName = "regex",
             .description = "A regular expression to match one or more packages in the profile.",