feat: nfpm symlinks

closes #1861

Signed-off-by: Carlos Alexandro Becker <caarlos0@gmail.com>

internal/pipe/nfpm/nfpm.go

@@ -169,6 +169,7 @@ func create(ctx *context.Context, fpm config.NFPM, format, arch string, binaries
 			EmptyFolders: overridden.EmptyFolders,
 			Files:        files,
 			ConfigFiles:  overridden.ConfigFiles,
+			Symlinks:     overridden.Symlinks,
 			Scripts: nfpm.Scripts{
 				PreInstall:  overridden.Scripts.PreInstall,
 				PostInstall: overridden.Scripts.PostInstall,

internal/pipe/nfpm/nfpm_test.go

@@ -112,6 +112,9 @@ func TestRunPipe(t *testing.T) {
 					ConfigFiles: map[string]string{
 						"./testdata/testfile.txt": "/etc/nope.conf",
 					},
+					Symlinks: map[string]string{
+						"/etc/nope2.conf": "/etc/nope.conf",
+					},
 					Replacements: map[string]string{
 						"linux": "Tux",
 					},

pkg/config/config.go

@@ -407,6 +407,7 @@ type NFPMOverridables struct {
 	EmptyFolders     []string          `yaml:"empty_folders,omitempty"`
 	Files            map[string]string `yaml:",omitempty"`
 	ConfigFiles      map[string]string `yaml:"config_files,omitempty"`
+	Symlinks         map[string]string `yaml:"symlinks,omitempty"`
 	Scripts          NFPMScripts       `yaml:"scripts,omitempty"`
 	RPM              NFPMRPM           `yaml:"rpm,omitempty"`
 	Deb              NFPMDeb           `yaml:"deb,omitempty"`

www/docs/customization/nfpm.md

@@ -128,6 +128,10 @@ nfpms:
       "tmp/app_generated.conf": "/etc/app.conf"
       "conf/*.conf": "/etc/foo/"
 
+    # Symlinks mapping from symlink name inside package to target inside package (overridable)
+    symlinks:
+      /sbin/foo: /usr/local/bin/foo
+
     # Scripts to execute during the installation of the package.
     # Keys are the possible targets during the installation process
     # Values are the paths to the scripts which will be executed