setup_pager() spawns a pager process and redirect the rest of our output
to it.
This will be needed to fix `tg patch` output in the next commit.
Signed-off-by: Kirill Smelkov <kirr@xxxxxxxxxxxxxxxxxxx>
---
tg.sh | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/tg.sh b/tg.sh
index 8c23d26..51a82af 100644
--- a/tg.sh
+++ b/tg.sh
@@ -243,6 +243,59 @@ do_help()
fi
}
+## Pager stuff
+
+# isatty FD
+isatty()
+{
+ tty -s 0<&$1 || return 1
+ return 0
+}
+
+# setup_pager
+# Spawn pager process and redirect the rest of our output to it
+setup_pager()
+{
+ isatty 1 || return 0
+
+ # TG_PAGER = GIT_PAGER | PAGER
+ # http://unix.derkeiler.com/Newsgroups/comp.unix.shell/2004-03/0792.html
+ case ${GIT_PAGER+XXX} in
+ '')
+ case ${PAGER+XXX} in
+ '')
+ # both GIT_PAGER & PAGER unset
+ TG_PAGER=''
+ ;;
+ *)
+ TG_PAGER="$PAGER"
+ ;;
+ esac
+ ;;
+ *)
+ TG_PAGER="$GIT_PAGER"
+ ;;
+ esac
+
+ [ -z "$TG_PAGER" -o "$TG_PAGER" = "cat" ] && return 0
+
+
+ # now spawn pager
+ export LESS=${LESS:-FRSX} # as in pager.c:pager_preexec()
+
+ _pager_fifo="$(mktemp -t tg-pager-fifo.XXXXXX)"
+ rm "$_pager_fifo" && mkfifo -m 600 "$_pager_fifo"
+
+ "$TG_PAGER" < "$_pager_fifo" &
+ exec > "$_pager_fifo" # dup2(pager_fifo.in, 1)
+
+ # this is needed so e.g. `git diff` will still colorize it's output if
+ # requested in ~/.gitconfig with color.diff=auto
+ export GIT_PAGER_IN_USE=1
+
+ # atexit(close(1); wait pager)
+ trap "exec >&-; rm $_pager_fifo; wait" EXIT
+}
## Startup
--
1.6.1.48.ge9b8
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