add riscv support

promu.spec

@@ -2,7 +2,7 @@
 
 Name:    promu
 Version: 0.7.0
-Release: 3
+Release: 4
 Summary: Prometheus Utility Tool
 License: ASL 2.0
 URL:     https://github.com/prometheus/promu
@@ -10,6 +10,8 @@ URL:     https://github.com/prometheus/promu
 Source0: https://github.com/prometheus/promu/archive/v%{version}.tar.gz
 Patch0:	 add-parameters-to-solve-the-strip.patch
 
+#RISC-V support
+Patch100: riscv64-support.patch
 
 BuildRequires: golang >= 1.13
 BuildRequires: gcc
@@ -23,6 +25,9 @@ promu is the utility tool for building and releasing Prometheus projects
 %prep
 %setup -q -T -n %{name}-%{version} -b 0
 %patch0 -p1
+%ifarch riscv64
+%patch100 -p1
+%endif
 
 %build
 export GOFLAGS="-mod=vendor -buildmode=pie"
@@ -36,6 +41,9 @@ install -D -m 755 %{name}-%{version} %{buildroot}%{_bindir}/promu
 %{_bindir}/promu
 
 %changelog
+* Wed Jun 14 2023 EastDong <xudong23@iscas.ac.cn> - 0.7.0-4
+- backport to support riscv
+
 * Fri Mar 10 2023 caodongxia <caodongxia@h-partners.com> - 0.7.0-3
 - remove linkmode external
 

riscv64-support.patch

@@ -0,0 +1,84 @@
+diff --git a/vendor/github.com/prometheus/procfs/cpuinfo.go b/vendor/github.com/prometheus/procfs/cpuinfo.go
+index 31d42f7..02693d1 100644
+--- a/vendor/github.com/prometheus/procfs/cpuinfo.go
++++ b/vendor/github.com/prometheus/procfs/cpuinfo.go
+@@ -19,6 +19,7 @@ import (
+ 	"bufio"
+ 	"bytes"
+ 	"errors"
++	"fmt"
+ 	"regexp"
+ 	"strconv"
+ 	"strings"
+@@ -407,6 +408,46 @@ func parseCPUInfoPPC(info []byte) ([]CPUInfo, error) {
+ 	return cpuinfo, nil
+ }
+ 
++func parseCPUInfoRISCV(info []byte) ([]CPUInfo, error) {
++	scanner := bufio.NewScanner(bytes.NewReader(info))
++
++	firstLine := firstNonEmptyLine(scanner)
++	if !strings.HasPrefix(firstLine, "processor") || !strings.Contains(firstLine, ":") {
++		return nil, fmt.Errorf("invalid cpuinfo file: %q", firstLine)
++	}
++	field := strings.SplitN(firstLine, ": ", 2)
++	v, err := strconv.ParseUint(field[1], 0, 32)
++	if err != nil {
++		return nil, err
++	}
++	firstcpu := CPUInfo{Processor: uint(v)}
++	cpuinfo := []CPUInfo{firstcpu}
++	i := 0
++
++	for scanner.Scan() {
++		line := scanner.Text()
++		if !strings.Contains(line, ":") {
++			continue
++		}
++		field := strings.SplitN(line, ": ", 2)
++		switch strings.TrimSpace(field[0]) {
++		case "processor":
++			v, err := strconv.ParseUint(field[1], 0, 32)
++			if err != nil {
++				return nil, err
++			}
++			i = int(v)
++			cpuinfo = append(cpuinfo, CPUInfo{}) // start of the next processor
++			cpuinfo[i].Processor = uint(v)
++		case "hart":
++			cpuinfo[i].CoreID = field[1]
++		case "isa":
++			cpuinfo[i].ModelName = field[1]
++		}
++	}
++	return cpuinfo, nil
++}
++
+ // firstNonEmptyLine advances the scanner to the first non-empty line
+ // and returns the contents of that line
+ func firstNonEmptyLine(scanner *bufio.Scanner) string {
+diff --git a/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go b/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go
+new file mode 100644
+index 0000000..e83c2e2
+--- /dev/null
++++ b/vendor/github.com/prometheus/procfs/cpuinfo_riscvx.go
+@@ -0,0 +1,19 @@
++// Copyright 2020 The Prometheus Authors
++// Licensed under the Apache License, Version 2.0 (the "License");
++// you may not use this file except in compliance with the License.
++// You may obtain a copy of the License at
++//
++// http://www.apache.org/licenses/LICENSE-2.0
++//
++// Unless required by applicable law or agreed to in writing, software
++// distributed under the License is distributed on an "AS IS" BASIS,
++// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
++// See the License for the specific language governing permissions and
++// limitations under the License.
++
++// +build linux
++// +build riscv riscv64
++
++package procfs
++
++var parseCPUInfo = parseCPUInfoRISCV