@@ -682,3 +682,63 @@ (define-public fatrace
power saving.")
(home-page "https://github.com/martinpitt/fatrace")
(license license:gpl3+)))
+
+(define-public pw
+ (package
+ (name "pw")
+ (version "2")
+ (source
+ (origin
+ (method git-fetch)
+ (uri (git-reference
+ (url "https://www.kylheku.com/git/pw")
+ (commit (string-append "pw-" version))))
+ (file-name (git-file-name name version))
+ (sha256
+ (base32 "1xn3qnzz48xan78cp83hfrcifrxx9lgnm14134qhyr5wvj7dk246"))))
+ (build-system gnu-build-system)
+ (arguments
+ (list #:tests? #f ; There are no tests
+ #:make-flags
+ #~(list (string-append "CC=" #$(cc-for-target))
+ (string-append "DESTDIR=" #$output))
+ #:phases
+ #~(modify-phases %standard-phases
+ (add-after 'unpack 'fix-makefile
+ (lambda _
+ (substitute* "Makefile"
+ (("/share/man/man1 \\\\") "/share/man/man1; \\"))))
+ (delete 'configure)
+ (add-before 'install 'make-install-dirs
+ (lambda _
+ (mkdir-p (string-append #$output "/bin"))
+ (mkdir-p (string-append #$output "/share/man/man1"))
+ (mkdir-p (string-append #$output "/share/man/man5")))))))
+ (home-page "https://www.kylheku.com/cgit/pw/")
+ (synopsis "Monitor recent lines of output from pipe")
+ (description
+ "@command{pw} is Pipe Watch, a utility that continuously reads lines of
+text from a pipe or pipe-like source, passes them through a FIFO buffer, and
+maintains a display based on the occasional sampling of the contents of the
+FIFO buffer, with useful features such as triggering and filtering.
+
+With @command{pw} you can:
+
+@itemize
+@item Interactively apply and remove filters on-the-fly, without interrupting
+the source.
+
+@item Make recurring patterns in the stream appear to ``freeze'' on the
+screen, using triggers.
+
+@item Prevent the overwhelming amount of output from a program from flooding
+the terminal, while consuming all of that output so that the program isn't
+blocked. @command{pw} can pause its display updates entirely.
+
+@item Juggle multiple shell background jobs that produce output, yet execute
+indefinitely without blocking. When @command{pw} runs as part of a shell
+background job, it continues to consume input, process filters and take
+snapshots, without displaying anything. When put into the foreground again,
+display resumes.
+@end itemize")
+ (license license:bsd-2)))