From 1d3e221a7a20bfd03517e3ae1e35e4a309a69b6a Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 10 Dec 2017 01:10:48 +0100
Subject: Add support for dependencies in global lib dir

Global lib dir is located at ~/.sibs/lib
TODO: If global lib dir doesn't exist, download it from github/server
---
 src/PkgConfig.cpp | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 src/PkgConfig.cpp

(limited to 'src/PkgConfig.cpp')

diff --git a/src/PkgConfig.cpp b/src/PkgConfig.cpp
new file mode 100644
index 0000000..11e1cf0
--- /dev/null
+++ b/src/PkgConfig.cpp
@@ -0,0 +1,131 @@
+#include "../include/PkgConfig.hpp"
+#include "../include/Exec.hpp"
+
+using namespace std;
+
+namespace sibs
+{
+    string trimRight(const string &input)
+    {
+        for(int i = input.size() - 1; i >= 0; --i)
+        {
+            if(!isspace(input[i]))
+                return input.substr(0, i + 1);
+        }
+        return input;
+    }
+
+    Result<bool> PkgConfig::validatePackageExists(const string &name)
+    {
+        string command = "pkg-config --exists '";
+        command += name;
+        command += "'";
+        Result<ExecResult> execResult = exec(command.c_str());
+        if(execResult.isErr())
+        {
+            return Result<bool>::Err(execResult.getErrMsg());
+        }
+
+        if(execResult.unwrap().exitCode == 1)
+        {
+            string errMsg = "pkg-config dependency not found: ";
+            errMsg += name;
+            return Result<bool>::Err(errMsg);
+        }
+        else if(execResult.unwrap().exitCode == 127)
+        {
+            return Result<bool>::Err("pkg-config is not installed");
+        }
+        else if(execResult.unwrap().exitCode != 0)
+        {
+            string errMsg = "Failed to check if dependency exists, Unknown error, exit code: ";
+            errMsg += to_string(execResult.unwrap().exitCode);
+            return Result<bool>::Err(errMsg);
+        }
+
+        return Result<bool>::Ok(true);
+    }
+
+    Result<bool> PkgConfig::validatePackageVersionAtLeast(const string &name, const string &version)
+    {
+        // TODO: Instead of checking if package version is same or newer, check if package is same major version
+        // and same or newer minor version
+
+        // Use --modversion instead and check if the version returned is newer or equal to dependency version.
+        // This way we can output installed version vs expected dependency version
+        string command = "pkg-config '--atleast-version=";
+        command += version;
+        command += "' '";
+        command += name;
+        command += "'";
+        Result<ExecResult> execResult = exec(command.c_str());
+        if(execResult.isErr())
+        {
+            return Result<bool>::Err(execResult.getErrMsg());
+        }
+
+        if(execResult.unwrap().exitCode == 1)
+        {
+            string errMsg = "Dependency ";
+            errMsg += name;
+            errMsg += " is installed but the version older than ";
+            errMsg += version;
+            return Result<bool>::Err(errMsg);
+        }
+        else if(execResult.unwrap().exitCode == 127)
+        {
+            return Result<bool>::Err("pkg-config is not installed");
+        }
+        else if(execResult.unwrap().exitCode != 0)
+        {
+            string errMsg = "Failed to check dependency version, Unknown error, exit code: ";
+            errMsg += to_string(execResult.unwrap().exitCode);
+            return Result<bool>::Err(errMsg);
+        }
+
+        return Result<bool>::Ok(true);
+    }
+
+    Result<string> PkgConfig::getDynamicLibsLinkerFlags(const vector<string> &libs)
+    {
+        if(libs.empty()) return Result<string>::Ok("");
+
+        string args;
+        for(const string &lib : libs)
+        {
+            args += " '";
+            args += lib;
+            args += "'";
+        }
+
+        string command = "pkg-config --libs";
+        command += args;
+        Result<ExecResult> execResult = exec(command.c_str());
+        if(execResult.isErr())
+            return Result<string>::Err(execResult.getErrMsg());
+
+        if(execResult.unwrap().exitCode == 0)
+        {
+            execResult.unwrap().execStdout = trimRight(execResult.unwrap().execStdout);
+            return Result<string>::Ok(execResult.unwrap().execStdout);
+        }
+        else if(execResult.unwrap().exitCode == 1)
+        {
+            // TODO: This shouldn't happen because we check if each dependency is installed before this,
+            // but maybe the package is uninstalled somewhere between here...
+            // Would be better to recheck if each package is installed here again
+            // to know which package was uninstalled
+            return Result<string>::Err("Packages not found");
+        }
+        else if(execResult.unwrap().exitCode == 127)
+        {
+            return Result<string>::Err("pkg-config is not installed");
+        }
+        else
+        {
+            string errMsg = "Failed to get package dynamic lib linking flags, Unknown error, exit code: ";
+            errMsg += to_string(execResult.unwrap().exitCode);
+            return Result<string>::Err(errMsg);
+        }
+    }
+}
\ No newline at end of file
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