In PKGBUILD noextract=() was removed. Added CGO_* and custom GOPATH env vars. Also added PREFIX var.

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2021,2022 Alexander "Arav" Andreev <me@arav.top>
+Copyright (c) 2021-2023 Alexander "Arav" Andreev <me@arav.su>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 

Makefile

@@ -2,7 +2,9 @@ TARGET=httpprocprobed
 
 SYSDDIR_=${shell pkg-config systemd --variable=systemdsystemunitdir}
 SYSDDIR=${SYSDDIR_:/%=%}
+
 DESTDIR:=
+PREFIX:=/usr/local
 
 VERSION:=3.0.0
 
@@ -17,15 +19,15 @@ ${TARGET}: ${SOURCES}
 	go build ${LDFLAGS} ${FLAGS}
 
 install:
-	install -Dm 0755 ${TARGET} ${DESTDIR}usr/bin/${TARGET}
-	install -Dm 0644 configs/config.example.json ${DESTDIR}etc/${TARGET}.json
-	install -Dm 0644 LICENSE ${DESTDIR}usr/share/licenses/${TARGET}/LICENSE
-	install -Dm 0644 init/systemd.service ${DESTDIR}${SYSDDIR}/${TARGET}.service
+	install -Dm 0755 ${TARGET} ${DESTDIR}${PREFIX}/bin/${TARGET}
+	install -Dm 0644 configs/config.example.json ${DESTDIR}${PREFIX}etc/${TARGET}.json
+	install -Dm 0644 LICENSE ${DESTDIR}${PREFIX}/share/licenses/${TARGET}/LICENSE
+	install -Dm 0644 init/systemd.service ${DESTDIR}${PREFIX}${SYSDDIR}/${TARGET}.service
 
 uninstall:
-	rm ${DESTDIR}usr/bin/${TARGET}
-	rm ${DESTDIR}usr/share/licenses/${TARGET}
-	rm ${DESTDIR}${SYSDDIR}/${TARGET}.service
+	rm ${DESTDIR}${PREFIX}/bin/${TARGET}
+	rm ${DESTDIR}${PREFIX}/share/licenses/${TARGET}
+	rm ${DESTDIR}${PREFIX}${SYSDDIR}/${TARGET}.service
 
 clean:
-	go clean
+	rm httpprocprobed

build/archlinux/PKGBUILD

@@ -9,15 +9,19 @@ license=('MIT')
 makedepends=('go>=1.17')
 backup=('etc/httpprocprobed.json')
 source=("https://git.arav.su/Arav/httpprocprobed/archive/$pkgver.tar.gz")
-noextract=()
 md5sums=('SKIP')
 
 build() {
     cd "$srcdir/$pkgname"
-    make DESTDIR="$pkgdir/"
+    export GOPATH="$srcdir"/gopath
+    export CGO_CPPFLAGS="${CPPFLAGS}"
+    export CGO_CFLAGS="${CFLAGS}"
+    export CGO_CXXFLAGS="${CXXFLAGS}"
+    export CGO_LDFLAGS="${LDFLAGS}"
+    make VERSION=$pkgver DESTDIR="$pkgdir/" PREFIX="/usr"
 }
 
 package() {
     cd "$srcdir/$pkgname"
-    make DESTDIR="$pkgdir/" install
+    make DESTDIR="$pkgdir/" PREFIX="/usr" install
 }

http.go

@@ -1,24 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"log"
-	"net/http"
-)
-
-// AreProcessesUp sends back status of watched processes.
-func AreProcessesUp(processes *[]Process) func(http.ResponseWriter, *http.Request) {
-	return func(w http.ResponseWriter, r *http.Request) {
-		if r.Method != http.MethodGet {
-			w.WriteHeader(http.StatusMethodNotAllowed)
-			w.Header().Add("Allow", "GET")
-			return
-		}
-
-		w.Header().Add("Content-Type", "application/json")
-		if err := json.NewEncoder(w).Encode(GetProcessesState(processes)); err != nil {
-			w.WriteHeader(http.StatusInternalServerError)
-			log.Printf("Failed to encode a process list: %s\n", err)
-		}
-	}
-}

init/systemd.service

@@ -1,12 +1,12 @@
 [Unit]
-Description=HTTPProcProbeD
+Description=HTTP Process Prober Daemon
 After=network.target
 
 [Service]
 Type=simple
 DynamicUser=yes
 Restart=on-failure
-ExecStart=/usr/bin/httpprocprobed -c /etc/httpprocprobed.conf
+ExecStart=/usr/bin/httpprocprobed -c /etc/httpprocprobed.json
 ExecReload=kill -HUP $MAINPID
 
 ReadOnlyPaths=/

main.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"encoding/json"
 	"flag"
 	"fmt"
 	"log"
@@ -74,3 +75,20 @@ func main() {
 		}
 	}
 }
+
+// AreProcessesUp sends back status of watched processes.
+func AreProcessesUp(processes *[]Process) func(http.ResponseWriter, *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodGet {
+			w.WriteHeader(http.StatusMethodNotAllowed)
+			w.Header().Add("Allow", "GET")
+			return
+		}
+
+		w.Header().Add("Content-Type", "application/json")
+		if err := json.NewEncoder(w).Encode(GetProcessesState(processes)); err != nil {
+			w.WriteHeader(http.StatusInternalServerError)
+			log.Printf("Failed to encode a process list: %s\n", err)
+		}
+	}
+}

process.go

@@ -1,11 +1,5 @@
 package main
 
-import (
-	"os"
-	"strconv"
-	"strings"
-)
-
 // Process contains an alias that will be returned when queries, and a process
 // name to look for.
 type Process struct {
@@ -26,33 +20,3 @@ func GetProcessesState(procs *[]Process) (ps ProcessesState) {
 
 	return
 }
-
-// GetProcessPIDs returns a list of PIDs found for a process.
-func GetProcessPIDs(name string) (pids []int, err error) {
-	dir, err := os.ReadDir("/proc/")
-	if err != nil {
-		return nil, err
-	}
-
-	for _, entry := range dir {
-		// This line demands a little clarification. Here we are making sure
-		// that the first character of a directory name is numeric. In ASCII
-		// all numerals are laying within 0x30-0x39 range.
-		if entry.IsDir() && entry.Name()[0]>>0x4&0xf == 0x3 {
-			cmdline, err := os.ReadFile("/proc/" + entry.Name() + "/cmdline")
-			if err != nil {
-				return nil, err
-			}
-
-			if strings.Contains(string(cmdline), name) {
-				pid, err := strconv.Atoi(entry.Name())
-				if err != nil {
-					continue
-				}
-				pids = append(pids, pid)
-			}
-		}
-	}
-
-	return pids, nil
-}

process_unix.go

@@ -0,0 +1,40 @@
+//go:build unix
+// +build unix
+
+package main
+
+import (
+	"os"
+	"strconv"
+	"strings"
+)
+
+// GetProcessPIDs returns a list of PIDs found for a process.
+func GetProcessPIDs(name string) (pids []int, err error) {
+	dir, err := os.ReadDir("/proc/")
+	if err != nil {
+		return nil, err
+	}
+
+	for _, entry := range dir {
+		// This line demands a little clarification. Here we are making sure
+		// that the first character of a directory name is numeric. In ASCII
+		// all numerals are laying within 0x30-0x39 range.
+		if entry.IsDir() && entry.Name()[0]>>0x4&0xf == 0x3 {
+			cmdline, err := os.ReadFile("/proc/" + entry.Name() + "/cmdline")
+			if err != nil {
+				return nil, err
+			}
+
+			if strings.Contains(string(cmdline), name) {
+				pid, err := strconv.Atoi(entry.Name())
+				if err != nil {
+					continue
+				}
+				pids = append(pids, pid)
+			}
+		}
+	}
+
+	return pids, nil
+}