ci/profiles: rewrite in Perl

Reading os-release(5) is a bit more painful, now; and still
requires using the shell.  However, sharing code between *BSDs
and being able to use v-strings for version comparisons is much
easier.

Test profiles for *BSDs are also trimmed down and more focused
on portability stuff.

3 files changed, 98 insertions, 99 deletions

diff --git a/ci/profiles.perl b/ci/profiles.perl
new file mode 100755
index 00000000..3d67143a
--- /dev/null
+++ b/ci/profiles.perl
@@ -0,0 +1,97 @@
+# Copyright (C) all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+# Prints OS-specific package profiles to stdout (one per line) to use
+# as command-line args for ci/deps.perl.  Called automatically by ci/run.sh
+eval 'exec perl -wS $0 ${1+"$@"}' # no shebang
+if 0; # running under some shell
+use v5.12;
+our ($ID, $PRETTY_NAME, $VERSION_ID); # same vars as os-release(5)
+my ($release, $version); # from uname
+if ($^O eq 'linux') { # try using os-release(5)
+        for my $f (qw(/etc/os-release /usr/lib/os-release)) {
+                next unless -f $f;
+                my @echo = map {
+                        qq{echo "\$"$_" = qq[\$$_];"; }
+                } qw(ID PRETTY_NAME VERSION_ID);
+                # rely on sh(1) to handle interpolation and such:
+                my $vars = `sh -c '. $f; @echo'`;
+                die "sh \$?=$?" if $?;
+                eval $vars;
+                die $@ if $@;
+                $VERSION_ID //= '';
+                $ID //= '';
+                if ($ID eq 'debian') {
+                        if ($PRETTY_NAME =~ m!/sid\z!) {
+                                $VERSION_ID = 'sid';
+                        } else {
+                                open my $fh, '<', $f or die "open($f): $!";
+                                my $msg = do { local $/; <$fh> };
+                                die <<EOM;
+ID=$ID, but no VERSION_ID
+==> $f <==
+$msg
+EOM
+                        }
+                }
+                last if $ID ne '' && $VERSION_ID ne '';
+        }
+        $ID = 'linux' if $ID eq ''; # cf. os-release(5)
+} elsif ($^O =~ m!\A(?:free|net|open)bsd\z!) { # TODO: net? dragonfly?
+        $ID = $^O;
+        require POSIX;
+        (undef, undef, $release, $version) = POSIX::uname();
+        $VERSION_ID = lc $release;
+        $VERSION_ID =~ s/[^0-9a-z\.\_\-]//sg; # cf. os-release(5)
+} else { # only support POSIX-like and Free systems:
+        die "$^O unsupported";
+}
+$VERSION_ID //= 0; # numeric? could be 'sid', actually...
+my %MIN_VER = (freebsd => v11, openbsd => v7.3, netbsd => v9.3);
+
+if (defined(my $min_ver = $MIN_VER{$^O})) {
+        my $vstr = eval "v$VERSION_ID";
+        die <<EOM if $vstr lt $min_ver;
+ID=$ID release=$release ($version) too old to support
+EOM
+}
+my $PKG_FMT = do {
+        if ($ID eq 'freebsd') { 'pkg' }
+        # *shrug*, as long as the name doesn't conflict with FreeBSD's
+        elsif ($ID eq 'openbsd') { 'pkg_add' }
+        elsif ($ID =~ m!\A(?:debian|ubuntu)\z!) { 'deb' }
+        elsif ($ID =~ m!\A(?:centos|redhat|fedora)\z!) { 'rpm' }
+        else { die "PKG_FMT undefined for ID=$ID" }
+};
+
+# these package group names and '-' syntax are passed to ci/deps.perl
+my $TASKS = do {
+        if ($ID eq 'freebsd') { <<EOM
+all devtest IO::KQueue-
+all devtest IO::KQueue
+all devtest Inline::C-
+all devtest Inline::C
+EOM
+        } elsif ($ID eq 'debian') { <<EOM
+all devtest
+all devtest Search::Xapian-
+all devtest-
+v2essential
+essential
+essential devtest-
+EOM
+        } elsif ($ID eq 'centos') { <<EOM
+v2essential devtest
+essential devtest
+all Search::Xapian-
+EOM
+        } elsif ($ID eq 'openbsd') { <<EOM
+all devtest Inline::C-
+all devtest Inline::C
+all devtest IO::KQueue-
+all devtest IO::KQueue
+EOM
+        } else { die "TODO: support ID=$ID VERSION_ID=$VERSION_ID" }
+};
+
+$TASKS =~ s/^/$PKG_FMT /gms;
+print $TASKS;
diff --git a/ci/profiles.sh b/ci/profiles.sh
deleted file mode 100755
index 04cefa15..00000000
--- a/ci/profiles.sh
+++ /dev/null
@@ -1,98 +0,0 @@
-#!/bin/sh
-# Copyright (C) all contributors <meta@public-inbox.org>
-# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
-
-# Prints OS-specific package profiles to stdout (one per line) to use
-# as command-line args for ci/deps.perl.  Called automatically by ci/run.sh
-
-# set by os-release(5) or similar
-ID= VERSION_ID=
-case $(uname -o 2>/dev/null || uname -s) in
-GNU/Linux)
-        for f in /etc/os-release /usr/lib/os-release
-        do
-                test -f $f || continue
-                . $f
-
-                # Debian sid (and testing) have no VERSION_ID
-                case $ID--$VERSION_ID in
-                debian--)
-                        case $PRETTY_NAME in
-                        */sid) VERSION_ID=sid ;;
-                        *)
-                                echo >&2 "$ID, but no VERSION_ID"
-                                echo >&2 "==> $f <=="
-                                cat >&2 $f
-                                exit 1
-                                ;;
-                        esac
-                        ;;
-                esac
-
-                case $ID--$VERSION_ID in
-                *--|--*) continue ;;
-                *) break ;;
-                esac
-        done
-        ;;
-FreeBSD)
-        ID=freebsd
-        VERSION_ID=$(uname -r | cut -d . -f 1)
-        test "$VERSION_ID" -lt 11 && {
-                echo >&2 "ID=$ID $(uname -r) too old to support";
-                exit 1
-        }
-        ;;
-OpenBSD)
-        ID=openbsd
-        VERSION_ID=$(uname -r | cut -d . -f 1)
-        test "$VERSION_ID" -lt 7 && {
-                echo >&2 "ID=$ID $(uname -r) too old to support";
-                exit 1
-        }
-        ;;
-esac
-
-case $ID in
-freebsd) PKG_FMT=pkg ;;
-debian|ubuntu) PKG_FMT=deb ;;
-centos|redhat|fedora) PKG_FMT=rpm ;;
-openbsd) PKG_FMT=pkg_add ;; # unsure about name, but it's not FreeBSD `pkg'
-*) echo >&2 "PKG_FMT undefined for ID=$ID in $0"
-esac
-
-case $ID-$VERSION_ID in
-freebsd-11|freebsd-12) sed "s/^/$PKG_FMT /" <<EOF
-all devtest-
-all devtest IO::KQueue-
-all devtest IO::KQueue
-v2essential
-essential
-essential devtest-
-EOF
-        ;;
-debian-sid|debian-9|debian-10) sed "s/^/$PKG_FMT /" <<EOF
-all devtest
-all devtest Search::Xapian-
-all devtest-
-v2essential
-essential
-essential devtest-
-EOF
-        ;;
-centos-7) sed "s/^/$PKG_FMT /" <<EOF
-v2essential devtest
-essential devtest
-all Search::Xapian-
-EOF
-        ;;
-openbsd-7) sed "s/^/$PKG_FMT /" <<EOF
-all devtest-
-all devtest Inline::C-
-all devtest Inline::C
-v2essential
-essential
-essential devtest-
-EOF
-        ;;
-esac
diff --git a/ci/run.sh b/ci/run.sh
index 1faf92c2..8f717508 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -13,7 +13,7 @@ fi
 NPROC=${NPROC-$({ getconf _NPROCESSORS_ONLN || getconf NPROCESSORS_ONLN ||
         gnproc || nproc || echo 2; } 2>/dev/null)}
 
-./ci/profiles.sh | while read args
+$PERL -w ci/profiles.perl | while read args
 do
         $DO $SUDO $PERL -w ci/deps.perl $args
         $DO $PERL Makefile.PL