pipe: run commands with sh -ccmdline

Now that all commands get the full command line as specified by the
user, it is possible to pass it down verbatim to sh -c.

Requested-by: Vitaly Ovchinnikov <v@postbox.nz>
Signed-off-by: Robin Jarry <robin@jarry.cc>

3 files changed, 19 insertions, 15 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74cb6999..96856337 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -38,6 +38,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - `:save -a` now works with multiple attachments with the same filename
 - `:open` uses the attachment extension for temporary files, if possible
 - memory leak when using notmuch with threading
+- `:pipe <cmd>` now executes `sh -c "<cmd>"` as indicated in the man page.
 
 ### Changed
 
diff --git a/commands/msg/pipe.go b/commands/msg/pipe.go
index d37ab0ff..e972b133 100644
--- a/commands/msg/pipe.go
+++ b/commands/msg/pipe.go
@@ -7,6 +7,7 @@ import (
 	"os/exec"
 	"regexp"
 	"sort"
+	"strings"
 	"time"
 
 	"git.sr.ht/~rjarry/aerc/commands"
@@ -17,10 +18,10 @@ import (
 )
 
 type Pipe struct {
-	Background bool     `opt:"-b"`
-	Full       bool     `opt:"-m"`
-	Part       bool     `opt:"-p"`
-	Cmd        []string `opt:"..."`
+	Background bool   `opt:"-b"`
+	Full       bool   `opt:"-m"`
+	Part       bool   `opt:"-p"`
+	Cmd        string `opt:"..."`
 }
 
 func init() {
@@ -39,6 +40,7 @@ func (p Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 	if p.Full && p.Part {
 		return errors.New("-m and -p are mutually exclusive")
 	}
+	name, _, _ := strings.Cut(p.Cmd, " ")
 
 	provider := aerc.SelectedTabContent().(widgets.ProvidesMessage)
 	if !p.Full && !p.Part {
@@ -53,7 +55,8 @@ func (p Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 	}
 
 	doTerm := func(reader io.Reader, name string) {
-		term, err := commands.QuickTerm(aerc, p.Cmd, reader)
+		cmd := []string{"sh", "-c", p.Cmd}
+		term, err := commands.QuickTerm(aerc, cmd, reader)
 		if err != nil {
 			aerc.PushError(err.Error())
 			return
@@ -62,7 +65,7 @@ func (p Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 	}
 
 	doExec := func(reader io.Reader) {
-		ecmd := exec.Command(p.Cmd[0], p.Cmd[1:]...)
+		ecmd := exec.Command("sh", "-c", p.Cmd)
 		pipe, err := ecmd.StdinPipe()
 		if err != nil {
 			return
@@ -82,11 +85,11 @@ func (p Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 		} else {
 			if ecmd.ProcessState.ExitCode() != 0 {
 				aerc.PushError(fmt.Sprintf(
-					"%s: completed with status %d", p.Cmd[0],
+					"%s: completed with status %d", name,
 					ecmd.ProcessState.ExitCode()))
 			} else {
 				aerc.PushStatus(fmt.Sprintf(
-					"%s: completed with status %d", p.Cmd[0],
+					"%s: completed with status %d", name,
 					ecmd.ProcessState.ExitCode()), 10*time.Second)
 			}
 		}
@@ -106,7 +109,7 @@ func (p Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 					} else {
 						doTerm(reader,
 							fmt.Sprintf("%s <%s",
-								p.Cmd[0], title))
+								name, title))
 					}
 				})
 				return nil
@@ -181,7 +184,7 @@ func (p Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 			if p.Background {
 				doExec(reader)
 			} else {
-				doTerm(reader, fmt.Sprintf("%s <%s", p.Cmd[0], title))
+				doTerm(reader, fmt.Sprintf("%s <%s", name, title))
 			}
 		}()
 	} else if p.Part {
@@ -198,7 +201,7 @@ func (p Pipe) Execute(aerc *widgets.Aerc, args []string) error {
 				doExec(reader)
 			} else {
 				name := fmt.Sprintf("%s <%s/[%d]",
-					p.Cmd[0], part.Msg.Envelope.Subject, part.Index)
+					name, part.Msg.Envelope.Subject, part.Index)
 				doTerm(reader, name)
 			}
 		})
diff --git a/doc/aerc.1.scd b/doc/aerc.1.scd
index b2123a54..bb1ea2d8 100644
--- a/doc/aerc.1.scd
+++ b/doc/aerc.1.scd
@@ -247,10 +247,10 @@ message list, the message in the message viewer, etc).
 	Moves the selected message to the target folder.
 
 *:pipe* [*-bmp*] _<cmd>_
-	Downloads and pipes the selected message into the given shell command, and
-	opens a new terminal tab to show the result. By default, the selected
-	message part is used in the message viewer and the full message is used in
-	the message list.
+	Downloads and pipes the selected message into the given shell command
+	(executed with _sh -c "<cmd>"_), and opens a new terminal tab to show
+	the result. By default, the selected message part is used in the message
+	viewer and the full message is used in the message list.
 
 	Operates on multiple messages when they are marked. When piping multiple
 	messages, aerc will write them with mbox format separators.