feat: nfpm rpm.summary and nfpm.ghost_files (#1892)

* feat: nfpm rpm.summary and nfpm.ghost_files

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

* fix: fmt

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

internal/pipe/nfpm/nfpm.go

@@ -197,8 +197,10 @@ func create(ctx *context.Context, fpm config.NFPM, format, arch string, binaries
 				},
 			},
 			RPM: nfpm.RPM{
+				Summary:              overridden.RPM.Summary,
 				Group:                overridden.RPM.Group,
 				Compression:          overridden.RPM.Compression,
+				GhostFiles:           overridden.RPM.GhostFiles,
 				ConfigNoReplaceFiles: overridden.RPM.ConfigNoReplaceFiles,
 				Signature: nfpm.RPMSignature{
 					KeyFile:       overridden.RPM.Signature.KeyFile,

pkg/config/config.go

@@ -331,10 +331,12 @@ type NFPMRPMSignature struct {
 
 // NFPMRPM is custom configs that are only available on RPM packages.
 type NFPMRPM struct {
+	Summary     string `yaml:"summary,omitempty"`
 	Group       string `yaml:"group,omitempty"`
 	Compression string `yaml:"compression,omitempty"`
 	// https://www.cl.cam.ac.uk/~jw35/docs/rpm_config.html
 	ConfigNoReplaceFiles map[string]string `yaml:"config_noreplace_files,omitempty"`
+	GhostFiles           []string          `yaml:"ghost_files,omitempty"`
 	Signature            NFPMRPMSignature  `yaml:"signature,omitempty"`
 }
 

www/docs/customization/nfpm.md

@@ -165,6 +165,10 @@ nfpms:
 
     # Custon configuration applied only to the RPM packager.
     rpm:
+      # The package summary.
+      # Defaults to the first line of the description.
+      summary: Explicit Summary for Sample Package
+
       # The package group. This option is deprecated by most distros
       # but required by old distros like CentOS 5 / EL 5 and earlier.
       group: Unspecified
@@ -177,6 +181,20 @@ nfpms:
       config_noreplace_files:
         path/to/local/bar.con: /etc/bar.conf
 
+      # These files are not actually present in the package, but the file names
+      # are added to the package header. From the RPM directives documentation:
+      #
+      # "There are times when a file should be owned by the package but not
+      # installed - log files and state files are good examples of cases you might
+      # desire this to happen."
+      #
+      # "The way to achieve this, is to use the %ghost directive. By adding this
+      # directive to the line containing a file, RPM will know about the ghosted
+      # file, but will not add it to the package."
+      ghost_files:
+        - /etc/casper.conf
+        - /var/log/boo.log
+
       # The package is signed if a key_file is set
       signature:
         # PGP secret key (can also be ASCII-armored). The passphrase is taken