git-p4: Unset P4DIFF environment variable when using 'p4 -du diff'

diff --git a/pager.c b/pager.c
index fb7a1a625abf07b0d896a270286ee422a700c14c..ca002f9f791b6cdb8257836be9e13fe648afa1cc 100644 (file)
--- a/pager.c
+++ b/pager.c
@@ -5,6 +5,8 @@
  * something different on Windows, for example.
  */
 
+static int spawned_pager;
+
 static void run_pager(const char *pager)
 {
        /*
@@ -41,7 +43,7 @@ void setup_pager(void)
        else if (!*pager || !strcmp(pager, "cat"))
                return;
 
-       pager_in_use = 1; /* means we are emitting to terminal */
+       spawned_pager = 1; /* means we are emitting to terminal */
 
        if (pipe(fd) < 0)
                return;
@@ -55,6 +57,7 @@ void setup_pager(void)
        /* return in the child */
        if (!pid) {
                dup2(fd[1], 1);
+               dup2(fd[1], 2);
                close(fd[0]);
                close(fd[1]);
                return;
@@ -70,3 +73,14 @@ void setup_pager(void)
        die("unable to execute pager '%s'", pager);
        exit(255);
 }
+
+int pager_in_use(void)
+{
+       const char *env;
+
+       if (spawned_pager)
+               return 1;
+
+       env = getenv("GIT_PAGER_IN_USE");
+       return env ? git_config_bool("GIT_PAGER_IN_USE", env) : 0;
+}