pager: exit cleanly on SIGPIPE (BC)
Changeset aaa751585325 removes SIGPIPE handling completely. This is wrong,
as it means that Mercurial does not exit when the pager does. Instead, raise
SignalInterrupt when SIGPIPE happens with a pager attached, to trigger the
normal exit path.
This will cause "killed!" to be printed to stderr (hence the BC warning),
but in the normal pager use case (where the pager gets both stderr and
stdout), this message is lost as we only get SIGPIPE when the pager quits.
Test EOL update
$ cat >> $HGRCPATH <<EOF
> [diff]
> git = 1
> EOF
$ seteol () {
> if [ $1 = "LF" ]; then
> EOL='\n'
> else
> EOL='\r\n'
> fi
> }
$ makerepo () {
> echo
> echo "# ==== setup repository ===="
> echo '% hg init'
> hg init repo
> cd repo
>
> cat > .hgeol <<EOF
> [patterns]
> **.txt = LF
> EOF
>
> printf "first\nsecond\nthird\n" > a.txt
> hg commit --addremove -m 'LF commit'
>
> cat > .hgeol <<EOF
> [patterns]
> **.txt = CRLF
> EOF
>
> printf "first\r\nsecond\r\nthird\r\n" > a.txt
> hg commit -m 'CRLF commit'
>
> cd ..
> }
$ dotest () {
> seteol $1
>
> echo
> echo "% hg clone repo repo-$1"
> hg clone --noupdate repo repo-$1
> cd repo-$1
>
> cat > .hg/hgrc <<EOF
> [extensions]
> eol =
> EOF
>
> hg update
>
> echo '% a.txt (before)'
> cat a.txt
>
> printf "first${EOL}third${EOL}" > a.txt
>
> echo '% a.txt (after)'
> cat a.txt
> echo '% hg diff'
> hg diff
>
> echo '% hg update 0'
> hg update 0
>
> echo '% a.txt'
> cat a.txt
> echo '% hg diff'
> hg diff
>
>
> cd ..
> rm -r repo-$1
> }
$ makerepo
# ==== setup repository ====
% hg init
adding .hgeol
adding a.txt
$ dotest LF
% hg clone repo repo-LF
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% a.txt (before)
first\r (esc)
second\r (esc)
third\r (esc)
% a.txt (after)
first
third
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first\r (esc)
-second\r (esc)
third\r (esc)
% hg update 0
merging a.txt
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
% a.txt
first
third
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first
-second
third
$ dotest CRLF
% hg clone repo repo-CRLF
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
% a.txt (before)
first\r (esc)
second\r (esc)
third\r (esc)
% a.txt (after)
first\r (esc)
third\r (esc)
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first\r (esc)
-second\r (esc)
third\r (esc)
% hg update 0
merging a.txt
1 files updated, 1 files merged, 0 files removed, 0 files unresolved
% a.txt
first
third
% hg diff
diff --git a/a.txt b/a.txt
--- a/a.txt
+++ b/a.txt
@@ -1,3 +1,2 @@
first
-second
third
$ rm -r repo