prompt: fix missing file errors in zsh

zsh seems to have a bug while redirecting the stderr of the 'read'
command:

    % read foo 2>/dev/null <foo
    zsh: no such file or directory: foo

Which causes errors to be displayed when certain files are missing.
Let's add a convenience function to manually check if the file is
readable before calling "read".

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Felipe Contreras 2014-04-11 18:32:25 -05:00 committed by Junio C Hamano
parent 68773ac915
commit 59d3924fbb

View File

@ -259,6 +259,13 @@ __git_ps1_colorize_gitstring ()
r="$c_clear$r"
}
eread ()
{
f="$1"
shift
test -r "$f" && read "$@" <"$f"
}
# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
# when called from PS1 using command substitution
# in this mode it prints text to add to bash PS1 prompt (includes branch name)
@ -321,9 +328,9 @@ __git_ps1 ()
local step=""
local total=""
if [ -d "$g/rebase-merge" ]; then
read b 2>/dev/null <"$g/rebase-merge/head-name"
read step 2>/dev/null <"$g/rebase-merge/msgnum"
read total 2>/dev/null <"$g/rebase-merge/end"
eread "$g/rebase-merge/head-name" b
eread "$g/rebase-merge/msgnum" step
eread "$g/rebase-merge/end" total
if [ -f "$g/rebase-merge/interactive" ]; then
r="|REBASE-i"
else
@ -331,10 +338,10 @@ __git_ps1 ()
fi
else
if [ -d "$g/rebase-apply" ]; then
read step 2>/dev/null <"$g/rebase-apply/next"
read total 2>/dev/null <"$g/rebase-apply/last"
eread "$g/rebase-apply/next" step
eread "$g/rebase-apply/last" total
if [ -f "$g/rebase-apply/rebasing" ]; then
read b 2>/dev/null <"$g/rebase-apply/head-name"
eread "$g/rebase-apply/head-name" b
r="|REBASE"
elif [ -f "$g/rebase-apply/applying" ]; then
r="|AM"
@ -358,7 +365,7 @@ __git_ps1 ()
b="$(git symbolic-ref HEAD 2>/dev/null)"
else
local head=""
if ! read head 2>/dev/null <"$g/HEAD"; then
if ! eread "$g/HEAD" head; then
if [ $pcmode = yes ]; then
PS1="$ps1pc_start$ps1pc_end"
fi