Updated vendoring

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/eiannone/keyboard v0.0.0-20200508000154-caf4b762e807
 	github.com/fsnotify/fsnotify v1.4.9 // indirect
 	github.com/gdamore/tcell v1.4.0
+	github.com/mackerelio/go-osstat v0.1.0
 	github.com/rivo/tview v0.0.0-20200818120338-53d50e499bf9
 	gopkg.in/fsnotify.v1 v1.4.7 // indirect
 )

go.sum

@@ -21,6 +21,8 @@ github.com/gdamore/tcell v1.4.0/go.mod h1:vxEiSDZdW3L+Uhjii9c3375IlDmR05bzxY404Z
 github.com/lucasb-eyer/go-colorful v1.0.2/go.mod h1:0MS4r+7BZKSJ5mw4/S5MPN+qHFF1fYclkSPilDOKW0s=
 github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
 github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mackerelio/go-osstat v0.1.0 h1:e57QHeHob8kKJ5FhcXGdzx5O6Ktuc5RHMDIkeqhgkFA=
+github.com/mackerelio/go-osstat v0.1.0/go.mod h1:1K3NeYLhMHPvzUu+ePYXtoB58wkaRpxZsGClZBJyIFw=
 github.com/mattn/go-runewidth v0.0.4/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
 github.com/mattn/go-runewidth v0.0.9 h1:Lm995f3rfxdpd6TSmuVCHVb/QhupuXlYr8sCI/QdE+0=
@@ -29,6 +31,7 @@ github.com/rivo/tview v0.0.0-20200818120338-53d50e499bf9 h1:csnip7QsoiE2Ee0RkELN
 github.com/rivo/tview v0.0.0-20200818120338-53d50e499bf9/go.mod h1:xV4Aw4WIX8cmhg71U7MUHBdpIQ7zSEXdRruGHLaEAOc=
 github.com/rivo/uniseg v0.1.0 h1:+2KBaVoUmb9XzDsrx/Ct0W/EYOSFf/nWTauy++DprtY=
 github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+golang.org/x/sys v0.0.0-20190410235845-0ad05ae3009d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626150813-e07cf5db2756/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9 h1:L2auWcuQIvxz9xSEqzESnV/QN/gNRXNApHi3fYwl2w0=
 golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/mackerelio/go-osstat/LICENSE.txt

@@ -0,0 +1,178 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
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+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+      institute patent litigation against any entity (including a
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+      or contributory patent infringement, then any patent licenses
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+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
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+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+

vendor/github.com/mackerelio/go-osstat/memory/memory_darwin.go

@@ -0,0 +1,126 @@
+// +build darwin
+
+package memory
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"io"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	// Reference: man 1 vm_stat
+	cmd := exec.CommandContext(ctx, "vm_stat")
+	out, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+	if err := cmd.Start(); err != nil {
+		return nil, err
+	}
+	memory, err := collectMemoryStats(out)
+	if err != nil {
+		go cmd.Wait()
+		return nil, err
+	}
+	if err := cmd.Wait(); err != nil {
+		return nil, err
+	}
+
+	// Reference: sys/sysctl.h, man 3 sysctl, sysctl vm.swapusage
+	ret, err := unix.SysctlRaw("vm.swapusage")
+	if err != nil {
+		return nil, fmt.Errorf("failed in sysctl vm.swapusage: %s", err)
+	}
+	swap, err := collectSwapStats(ret)
+	if err != nil {
+		return nil, err
+	}
+	memory.SwapTotal = swap.Total
+	memory.SwapUsed = swap.Used
+	memory.SwapFree = swap.Avail
+
+	return memory, nil
+}
+
+// Stats represents memory statistics for darwin
+type Stats struct {
+	Total, Used, Cached, Free, Active, Inactive, SwapTotal, SwapUsed, SwapFree uint64
+}
+
+// References:
+//   - https://support.apple.com/en-us/HT201464#memory
+//   - https://developer.apple.com/library/content/documentation/Performance/Conceptual/ManagingMemoryStats/Articles/AboutMemoryStats.html
+//   - https://opensource.apple.com/source/system_cmds/system_cmds-790/vm_stat.tproj/
+func collectMemoryStats(out io.Reader) (*Stats, error) {
+	scanner := bufio.NewScanner(out)
+	if !scanner.Scan() {
+		return nil, fmt.Errorf("failed to scan output of vm_stat")
+	}
+	line := scanner.Text()
+	if !strings.HasPrefix(line, "Mach Virtual Memory Statistics:") {
+		return nil, fmt.Errorf("unexpected output of vm_stat: %s", line)
+	}
+
+	var memory Stats
+	var speculative, wired, purgeable, fileBacked, compressed uint64
+	memStats := map[string]*uint64{
+		"Pages free":                   &memory.Free,
+		"Pages active":                 &memory.Active,
+		"Pages inactive":               &memory.Inactive,
+		"Pages speculative":            &speculative,
+		"Pages wired down":             &wired,
+		"Pages purgeable":              &purgeable,
+		"File-backed pages":            &fileBacked,
+		"Pages occupied by compressor": &compressed,
+	}
+	for scanner.Scan() {
+		line := scanner.Text()
+		i := strings.IndexRune(line, ':')
+		if i < 0 {
+			continue
+		}
+		if ptr := memStats[line[:i]]; ptr != nil {
+			val := strings.TrimRight(strings.TrimSpace(line[i+1:]), ".")
+			if v, err := strconv.ParseUint(val, 10, 64); err == nil {
+				*ptr = v * 4096
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("scan error for vm_stat: %s", err)
+	}
+
+	memory.Cached = purgeable + fileBacked
+	memory.Used = wired + compressed + memory.Active + memory.Inactive + speculative - memory.Cached
+	memory.Total = memory.Used + memory.Cached + memory.Free
+	return &memory, nil
+}
+
+// xsw_usage in sys/sysctl.h
+type swapUsage struct {
+	Total     uint64
+	Avail     uint64
+	Used      uint64
+	Pagesize  int32
+	Encrypted bool
+}
+
+func collectSwapStats(out []byte) (*swapUsage, error) {
+	if len(out) != 32 {
+		return nil, fmt.Errorf("unexpected output of sysctl vm.swapusage: %v (len: %d)", out, len(out))
+	}
+	return (*swapUsage)(unsafe.Pointer(&out[0])), nil
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_freebsd.go

@@ -0,0 +1,118 @@
+// +build freebsd
+
+package memory
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"io"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	return collectMemoryStats()
+}
+
+// Stats represents memory statistics for freebsd
+type Stats struct {
+	Total, Used, Cached, Free, Active, Inactive, Wired,
+	SwapTotal, SwapUsed, SwapFree uint64
+}
+
+type memStat struct {
+	name  string
+	ptr   *uint64
+	scale *uint64
+}
+
+func collectMemoryStats() (*Stats, error) {
+	var pageSize uint64
+	one := uint64(1)
+
+	var memory Stats
+	memStats := []memStat{
+		{"vm.stats.vm.v_page_size", &pageSize, &one},
+		{"hw.physmem", &memory.Total, &one},
+		{"vm.stats.vm.v_cache_count", &memory.Cached, &pageSize},
+		{"vm.stats.vm.v_free_count", &memory.Free, &pageSize},
+		{"vm.stats.vm.v_active_count", &memory.Active, &pageSize},
+		{"vm.stats.vm.v_inactive_count", &memory.Inactive, &pageSize},
+		{"vm.stats.vm.v_wire_count", &memory.Wired, &pageSize},
+	}
+
+	for _, stat := range memStats {
+		ret, err := unix.SysctlRaw(stat.name)
+		if err != nil {
+			return nil, fmt.Errorf("failed in sysctl %s: %s", stat.name, err)
+		}
+		if len(ret) == 8 {
+			*stat.ptr = *(*uint64)(unsafe.Pointer(&ret[0])) * *stat.scale
+		} else if len(ret) == 4 {
+			*stat.ptr = uint64(*(*uint32)(unsafe.Pointer(&ret[0]))) * *stat.scale
+		} else {
+			return nil, fmt.Errorf("failed in sysctl %s: %s", stat.name, err)
+		}
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	// collect swap statistics from swapinfo command
+	cmd := exec.CommandContext(ctx, "swapinfo", "-k")
+	out, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+	if err := cmd.Start(); err != nil {
+		return nil, err
+	}
+	memory.SwapTotal, memory.SwapUsed, err = collectSwapStats(out)
+	if err != nil {
+		go cmd.Wait()
+		return nil, err
+	}
+	if err := cmd.Wait(); err != nil {
+		return nil, err
+	}
+
+	memory.Used = memory.Total - memory.Free - memory.Cached - memory.Inactive
+	memory.SwapFree = memory.SwapTotal - memory.SwapUsed
+
+	return &memory, nil
+}
+
+func collectSwapStats(out io.Reader) (uint64, uint64, error) {
+	scanner := bufio.NewScanner(out)
+	if !scanner.Scan() {
+		return 0, 0, fmt.Errorf("failed to scan output of swapinfo")
+	}
+	line := scanner.Text()
+	if !strings.HasPrefix(line, "Device") {
+		return 0, 0, fmt.Errorf("unexpected output of swapinfo: %s", line)
+	}
+
+	var total, used uint64
+	for scanner.Scan() {
+		line := scanner.Text()
+		fields := strings.Fields(line)
+		if len(fields) < 5 {
+			continue
+		}
+		if v, err := strconv.ParseUint(fields[1], 10, 64); err == nil {
+			total += v * 1024
+		}
+		if v, err := strconv.ParseUint(fields[2], 10, 64); err == nil {
+			used += v * 1024
+		}
+	}
+
+	return total, used, nil
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_linux.go

@@ -0,0 +1,77 @@
+// +build linux
+
+package memory
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	// Reference: man 5 proc, Documentation/filesystems/proc.txt in Linux source code
+	file, err := os.Open("/proc/meminfo")
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return collectMemoryStats(file)
+}
+
+// Stats represents memory statistics for linux
+type Stats struct {
+	Total, Used, Buffers, Cached, Free, Available, Active, Inactive,
+	SwapTotal, SwapUsed, SwapCached, SwapFree uint64
+	MemAvailableEnabled bool
+}
+
+func collectMemoryStats(out io.Reader) (*Stats, error) {
+	scanner := bufio.NewScanner(out)
+	var memory Stats
+	memStats := map[string]*uint64{
+		"MemTotal":     &memory.Total,
+		"MemFree":      &memory.Free,
+		"MemAvailable": &memory.Available,
+		"Buffers":      &memory.Buffers,
+		"Cached":       &memory.Cached,
+		"Active":       &memory.Active,
+		"Inactive":     &memory.Inactive,
+		"SwapCached":   &memory.SwapCached,
+		"SwapTotal":    &memory.SwapTotal,
+		"SwapFree":     &memory.SwapFree,
+	}
+	for scanner.Scan() {
+		line := scanner.Text()
+		i := strings.IndexRune(line, ':')
+		if i < 0 {
+			continue
+		}
+		fld := line[:i]
+		if ptr := memStats[fld]; ptr != nil {
+			val := strings.TrimSpace(strings.TrimRight(line[i+1:], "kB"))
+			if v, err := strconv.ParseUint(val, 10, 64); err == nil {
+				*ptr = v * 1024
+			}
+			if fld == "MemAvailable" {
+				memory.MemAvailableEnabled = true
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("scan error for /proc/meminfo: %s", err)
+	}
+
+	memory.SwapUsed = memory.SwapTotal - memory.SwapFree
+
+	if memory.MemAvailableEnabled {
+		memory.Used = memory.Total - memory.Available
+	} else {
+		memory.Used = memory.Total - memory.Free - memory.Buffers - memory.Cached
+	}
+
+	return &memory, nil
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_other.go

@@ -0,0 +1,18 @@
+// +build !linux,!darwin,!windows,!freebsd
+
+package memory
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	return nil, fmt.Errorf("memory statistics not implemented for: %s", runtime.GOOS)
+}
+
+// Stats represents memory statistics
+type Stats struct {
+	Total, Used, Cached, Free, Active, Inactive, SwapTotal, SwapUsed, SwapFree uint64
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_windows.go

@@ -0,0 +1,53 @@
+// +build windows
+
+package memory
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+)
+
+var (
+	kernel32             = syscall.NewLazyDLL("kernel32.dll")
+	globalMemoryStatusEx = kernel32.NewProc("GlobalMemoryStatusEx")
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	var memoryStatus memoryStatusEx
+	memoryStatus.Length = uint32(unsafe.Sizeof(memoryStatus))
+
+	ret, _, err := globalMemoryStatusEx.Call(uintptr(unsafe.Pointer(&memoryStatus)))
+	if ret == 0 {
+		return nil, fmt.Errorf("failed in GlobalMemoryStatusEx: %s", err)
+	}
+
+	var memory Stats
+	memory.Free = memoryStatus.AvailPhys
+	memory.Total = memoryStatus.TotalPhys
+	memory.Used = memory.Total - memory.Free
+	memory.PageFileTotal = memoryStatus.TotalPageFile
+	memory.PageFileFree = memoryStatus.AvailPageFile
+	memory.VirtualTotal = memoryStatus.TotalVirtual
+	memory.VirtualFree = memoryStatus.AvailVirtual
+
+	return &memory, nil
+}
+
+type memoryStatusEx struct {
+	Length               uint32
+	MemoryLoad           uint32
+	TotalPhys            uint64
+	AvailPhys            uint64
+	TotalPageFile        uint64
+	AvailPageFile        uint64
+	TotalVirtual         uint64
+	AvailVirtual         uint64
+	AvailExtendedVirtual uint64
+}
+
+// Stats represents memory statistics for Windows
+type Stats struct {
+	Total, Used, Free, PageFileTotal, PageFileFree, VirtualTotal, VirtualFree uint64
+}

vendor/modules.txt

@@ -70,6 +70,9 @@ github.com/gdamore/tcell/terminfo/x/xterm
 github.com/gdamore/tcell/terminfo/x/xterm_kitty
 # github.com/lucasb-eyer/go-colorful v1.0.3
 github.com/lucasb-eyer/go-colorful
+# github.com/mackerelio/go-osstat v0.1.0
+## explicit
+github.com/mackerelio/go-osstat/memory
 # github.com/mattn/go-runewidth v0.0.9
 github.com/mattn/go-runewidth
 # github.com/rivo/tview v0.0.0-20200818120338-53d50e499bf9